Overview
ProductRatingMost Used ByProduct SummaryStarting Price
Drupal
Score 8.2 out of 10
N/A
Drupal is a free, open-source content management system written in PHP that competes primarily with Joomla and Plone. The standard release of Drupal, known as Drupal core, contains basic features such as account and menu management, RSS feeds, page layout customization, and system administration.N/A
Joomla
Score 7.4 out of 10
N/A
Joomla! is a free and open source content management system used to publish web content. Included features are page caching, RSS feeds, printable versions of pages, news flashes, blogs, polls, a search function, and support for language internationalization.N/A
WordPress
Score 8.5 out of 10
N/A
Wordpress is an open-source publishing platform popular with bloggers, and a content management system, known for its simplicity and modifiability. Websites may host their own blogging communities, controlling and moderating content from a single dashboard.N/A
Pricing
DrupalJoomla!WordPress
Editions & Modules
No answers on this topic
No answers on this topic
No answers on this topic
Offerings
Pricing Offerings
DrupalJoomlaWordPress
Free Trial
NoNoNo
Free/Freemium Version
NoNoNo
Premium Consulting/Integration Services
NoNoNo
Entry-level Setup FeeNo setup feeNo setup feeNo setup fee
Additional Details
More Pricing Information
Community Pulse
DrupalJoomla!WordPress
Considered Multiple Products
Drupal
Chose Drupal
Joomla is terrible. I would never recommend Joomla over Drupal. Drupal's community is much more active and new product updates come out much more quickly.

Chose Drupal
Drupal is similar to WordPress when discussing content management and WYSIWYG capabilities. That is where the similarities end from a functional standpoint. WordPress is a top contender for blog sites, whereas Drupal is for sellable content, i.e. products and services. Both …
Chose Drupal
We have previously used WordPress, we found that the site is limited in its potential compared to Drupal. The biggest slow down we have seen is in the use of plug ins, unlike Drupal, WordPress experienced severe slowdowns. The user interface is rather slow and unrefined …
Chose Drupal
WordPress would be the best alternative to Drupal that I've seen, but in my experience, Drupal is better at complex websites that need a lot of customization. WordPress would be much better suited for a blog than Drupal.

I only briefly looked at Joomla, and I wasn't impressed.
Chose Drupal
Drupal has strong role-based permissions for users, powerful content blocks for editing, and granular customizing options in their views. For a company or organization requiring a lot of customization, Drupal can be a really powerful tool. However, Drupal does require …
Chose Drupal
In my mind, Drupal and WordPress are the top open source CMSes, and I rarely recommend not going with an open source CMS. WordPress can be great, especially for single developers, but I find that the code structure and extensibility of Drupal makes it superior for many use …
Chose Drupal
I selected Drupal because of the simplicity upon going live. "Simple" is not the word I would use prior to the site going live though. I have used Jumla (which I believe was part of Drupal as one CMS about 12 or 15 years ago). Jumla is almost identical in capabilities to …
Chose Drupal
Security-wise and traffic-wise Drupal is built to handle a lot. While the other platforms mentioned ( mainly WordPress ) are great and have a large community, I would only use Drupal for an Enterprise level platform to build a website on. I first learned about Drupal about 10 …
Chose Drupal
I've used WordPress sparingly when helping a client with an existing website. I find it much less powerful and robust, and frankly confusing. The way WordPress websites are set up in the backend doesn't make sense to me after getting used to how Drupal is set up. They're …
Chose Drupal
We did a comparison of Drupal against Joomla, WordPress, and Ingeniux. We found that its multiple themes available for web pages, user management, comment management, and form generation stands apart from its competitors.
Chose Drupal
Drupal is far more usable and stable than Joomla!, and the developer community support is significantly stronger. While Drupal is often compared to WordPress, they are fundamentally different platforms, and in most projects, it's very clear when the requirements are beyond what …
Chose Drupal
We first had a WordPress-based website, that evolved to a custom third-party developed content management system. In both cases, that involved additional costs for any change request, any security or any scalability need.
WordPress didn't meet enterprise requirements. That also …
Chose Drupal
We use both, for different projects (Joomla and Drupal). Drupal proved to be more robust, more secure and more integrable with PHP applications.
Drupal requires a more senior technical team but allows for more complex activities. It's great if you have a medium to a large …
Chose Drupal
WordPress for sure has a bigger community, a lot of paid extensions which sometimes is easier to purchase and get started, a lot of pre-designed templates to get you going, but nowadays with the scale of the projects we've been working with, and the need for custom-tailored …
Chose Drupal
Drupal requires less to no coding abilities to spin up sites.
Even if someone is preparing to develop sites that require technical know how then Drupal provides role based systems to seperate developers from content writers.
Drupal 8 and 9 now have a vast array of plugins. Now …
Chose Drupal
Drupal is really the only well-supported open-source CMS that is designed for large, data-rich websites. There just really weren't any good alternatives. There are plenty of CMSs that excel at small to medium-sized websites. But for a large website with lots of structured data, …
Chose Drupal
Although Drupal is not the most used, it has great performance and is more used in professional projects. It allows us to expand without starting from scratch.
Chose Drupal
Drupal supports lots of devices like Mac, Windows, Linux etc. easily, and it is an open source product so there's no cost required. Lots of other products require purchasing, costing a high amount. The support system of Drupal is also good in comparison to other products. The …
Chose Drupal
Drupal is certainly a more complex animal, comparatively. But its power lies in its flexibility, extensibility, and stability. And the API is fantastic. There's really nothing else like it.
Chose Drupal
When selected, Drupal was the tool that had enough power to create a robust intranet while not being too overly complicated. It allowed for custom integrations that were developed from IT, and it was able to handle the mass amount of users we needed, many of whom are not overly …
Chose Drupal
Drupal is more robust in every way than these other CMS options. The module library, the vast theme options, and the user defined roles make this the CMS for any job.
Chose Drupal
We decided to go with Drupal because of the immense community and library of add on modules available within drupal as well as the availability to customize it and finally the vast availability of developers also helped sway our choice to go with Drupal. Drupal had the best …
Joomla
Chose Joomla!
Joomla and Concrete5 have about the same capability and similar issues. Purchasing a SAAS like Squarespace, Weebly or Wix would be worth the price to remove the hassle of Joomla. A more robust free CMS like WordPress or Drupal would be a better solution if you wanted to remain …
Chose Joomla!
For complex websites, with unique customizations, Joomla is my go to. If my clients want a user-friendly administration and plan on making changes to their website content themselves, I choose WordPress. Joomla's templating system is quicker and simpler to create completely …
Chose Joomla!
Joomla is one of the least intuitive options and has had some issues with updates in the past, as compared to WordPress. Magento has similar issues, but Joomla doesn't have as much flexibility as Magento (and of course, Joomla does not have e-commerce features built-in). …
Chose Joomla!
I have selected Joomla when I needed an easy content management platform for a team of beginners. It's not as easy to customize or optimize like WordPress or Wix sites, but it's a great introduction until you are ready for the more advanced features offered by these alternative …
Chose Joomla!
I think Joomla is on-par with Drupal and Umbraco and similar platforms, but WordPress does seem to be above it. WordPress has become so common that there are more and more features becoming available to it that exceed the Joomla platform and make it hard to compete with. WordPre…
Chose Joomla!
Joomla! is the #2 Open Source CMS behind WordPress, which we also use, and ahead of Drupal, which we have evaluated but decided not to pursue. Joomla! generally performs better than WP for clients that need more complexity to their websites, including flexibility in templating, …
Chose Joomla!
We chose Joomla! over Drupal or WordPress because it's in the middle ground between those two systems. We needed something that can be extended down the road if we need it, but at the same time, it can't be too complex. We felt Drupal is too complex and WordPress seems to be …
Chose Joomla!
WordPress is probably the most popular CMS, followed by Joomla! For me, I find Joomla! much more intuitive. Both use themes and can provide excellent results, however I prefer Joomla!
Chose Joomla!
WordPress is designed in a way to make it fairly fool-proof for the admin, but in this approach, it handcuffs the user from having control or making it easy to do, in many cases, what are basic things (changing the title, URL segment, etc...). With the exception of the …
Chose Joomla!
Part of Joomla core, which is what comes with Joomla when you install it, is it's Access Control Lists. It allows you to not only control which users can access what, but allows you to create custom groups and have unique access per group. WordPress can't do that without a …
Chose Joomla!
I like Joomla! a lot more than WordPress, as I find this constrictive in the way that they have made it a one size fits all CMS. I also find that their vulnerabilities are far bigger than Joomla's.
Chose Joomla!
There are many themes and other design assets for Joomla! we can use from paid and free libraries throughout the internet. WordPress on the other hand is also very good and useful, comparatively Joomla! offered more features and at a better price.
Chose Joomla!
Joomla is more of a developer's CMS. It is much more customizable than WordPress.
Chose Joomla!
As a user, it is more than OK for those standard daily operations like publishing and editing or comment management. As a developer, I have a very different perspective. Joomla! is not my favorite platform. Only ready-to-use tools like Wix can be less friendly than having to …
Chose Joomla!
We tested other platforms like WordPress, Magento and some local CMS. 
But Joomla offered us better resources for generating content.
Joomla is a CMS suitable for many types of projects, especially if you have several people editing content at the same time. 
Chose Joomla!
Simpler and easy to visually understand elements and tools. We don't need to do any fancy coding or use too many plugins. çompared with WordPress and Webflow, we believe Joomla! has a more accurate and easy interface that allows the user to finish tasks in less time than the …
Chose Joomla!
All the reviews I read are lazy. They all say the same old, WP is easy, Joomla! harder but good and Drupal security. But that's so old, as they were measuring a decade ago. Joomla! has moved ahead. Its got over 70 languages and has been multi-language from the start. [It] was …
Chose Joomla!
I don't believe Joomla compares to any other programs I have used. There are similar products, but none that are quite as easy.
Chose Joomla!
At the starting of my career, I got Joomla! to work on, SO I learned about Joomla!. Initially, it was tough to learn component development but after [learning] something, I like to do it.
Chose Joomla!
We have used other online website builders as well as CMS systems. In my humble opinion, joomla! is much more versatile and there are so much better extensions available for Jooma! than any of the others.
Chose Joomla!
We selected Joomla because of the available extensions met are needs at the time.
Chose Joomla!
Joomla has a more general and wide use, more documentation, forums and community that develops many templates and extensions for almost all purposes. It has a great web-based administration environment and, with the correct permissions setting, it can be prepared for a regular …
Chose Joomla!
Overall, I think Joomla! stacks up low compared to the above platforms, particularly through a lens of SEO and mobile responsiveness.
WordPress
Chose WordPress
Drupal is a much more complex beast. While simple sites can be created with Drupal, it has a larger learning curve. Additionally, upgrading to newer versions of Drupal is wrought with difficulty. There has been no clear upgrade path for the last 4 or 5 versions, often …
Chose WordPress
It was important for our business needs that it be easy to manage our website for non-technical staff. WordPress was significantly easier to use compared to Drupal. While it is possible that staff could have been trained on Drupal, WordPress required minimal training in order …
Chose WordPress
Wix was considered but was then rejected once we realized we could not self-host. WordPress allows self-hosting, while Wix does not.

Joomla was considered but required much more technical experience on behalf of the people who would be posting content. WordPress is much easier …
Chose WordPress
WordPress is easier to use than Drupal or Wix. Drupal still requires an IT back-end admin to upgrade the code and successfully manage the site. Wix provides full user control of the user experience but acts as a page builder vs. a content management system. All are good …
Chose WordPress
While still being relatively user-friendly (or at least pretty easy to learn the basics), WordPress blows the other hosted, 'out of the box' platforms like Wix and Squarespace out of the water. They simply can't compete when it comes to customizability, especially back-end and …
Chose WordPress
The almost unlimited functionality provided in WordPress is versatile and its ability to self host your own installation makes it less likely to get locked into a service provider. For example, other CMS like Wix and those provided by many hosting companies effectively lock you …
Chose WordPress
WordPress is WAY easier to get into than Drupal. Despite a lot of initial complaints about their editor, Gutenberg, I loved it. The auto-updates can actually work, unlike Drupal that often have more issues probably because Drupal requires a lot more custom work and it's …
Chose WordPress
WordPress is more flexible and/or easier to use than the platforms above. While Wix and Squarespace are good for non-developers, and Drupal is good only for developers, WordPress can work well for both the end user, the viewer, and the developer.
Chose WordPress
WordPress is more popular and has more default templates for website creation. Moreover, it is easy to use. The availability of large communities makes it easier to fix any encountered bug or problem during the development process. Apart from this, WordPress is open source and …
Chose WordPress
We only build and support websites on WordPress and Joomla!. In general, WordPress is a good fit for our smaller clients who want to handle all of the maintenance and updates themselves. Our clients with larger and more complex content needs, or more sophisticated …
Chose WordPress
WordPress relatively easy to use, especially for beginners, with an intuitive UI. WordPress has a massive user base, extensive plugin library, and support forums, making it easier to find solutions to problems or get assistance, if we stuck anywhere during the setup of website. …
Chose WordPress
I used Wix and Squarespace for a few projects then I found WordPress, as a developer with programming background I needed the flexibility of adding a touch of code on my website be Wix did not allow me or give me that flexibility. WordPress gave me the room for customization …
Chose WordPress
WordPress is by far the best website CMS available on the market. It is an open-source free solution with endless possibilities of websites that you can build. You don't need to be a developer to build a site, but there are options to use code to take your website to the next …
Chose WordPress
WordPress has the largest community of users, selection of plugins and themes, and the best third party support on the market.

It's tempting to go with something that is less customizable and therefore requires less maintenance, but if you desire flexibility, WordPress is a good …
Chose WordPress
WordPress is free and so easy to use. I would recommend it over any competitor except for e-commerce. For an e-commerce website in most cases, I would recommend Shopify because of their shopping cart and processing speed. Shopify does charge monthly, as opposed to using …
Chose WordPress
I prefer Wordpress because it is open source and has a huge community of users and developers. So it is incredibly flexible already because of the plugins available, and it can be further customized to any extent by readily available developer talent.
Chose WordPress
In my opinion, WordPress has the best documentation compared to the rest. If the built-in functionality is not enough, WordPress has a great variety of plugins, which is not always the same for competitors.
Chose WordPress
WordPress is much more user-friendly than systems such as AEM and Oracle, and thus more accessible and easy to onboard people to. It is also much more budget-friendly. WordPress is the most widely-used CMS on the market for a reason. WordPress does lack the power and other …
Chose WordPress
WordPress has a larger market share and it is friendly and widely used. Across organizations, it shows ease of use, ability to integrate, multiple paths for creating sites, designs, and much more. For volunteer based organizations, WordPress is ideal and provides a path to …
Chose WordPress
WordPress has so many incredible features, it allows users to build a professional website and users can customize the themes even from the front-end and also from the code editor. WordPress plugins are more professional and useful if we compare them with other content …
Chose WordPress
WordPress is perhaps the best developed and most active community simply for its sheer size. It is extendable and has plentiful existing extensions.
Chose WordPress
We chose WordPress because our interest at the moment is geared towards an institutional presentation and opening a new channel of communication with the client, and WordPress has one of these premises as its native. Speaking on the communication channel, we created a page with …
Chose WordPress
While all these three products have special functions on their own, WordPress has the ability to expand itself to be used in place of any of them. The major advantage with WordPress is the flexibility of creating a simple, low-maintenance, low resource-consuming website as well …
Top Pros
Top Cons
Features
DrupalJoomla!WordPress
Security
Comparison of Security features of Product A and Product B
Drupal
10.0
65 Ratings
22% above category average
Joomla!
7.0
44 Ratings
14% below category average
WordPress
8.2
127 Ratings
2% above category average
Role-based user permissions10.065 Ratings7.044 Ratings8.2127 Ratings
Platform & Infrastructure
Comparison of Platform & Infrastructure features of Product A and Product B
Drupal
9.5
62 Ratings
21% above category average
Joomla!
6.5
41 Ratings
17% below category average
WordPress
6.4
104 Ratings
18% below category average
API9.158 Ratings7.039 Ratings6.394 Ratings
Internationalization / multi-language10.053 Ratings6.140 Ratings6.579 Ratings
Web Content Creation
Comparison of Web Content Creation features of Product A and Product B
Drupal
9.4
68 Ratings
21% above category average
Joomla!
7.2
47 Ratings
5% below category average
WordPress
8.0
133 Ratings
5% above category average
WYSIWYG editor9.161 Ratings6.046 Ratings8.3120 Ratings
Code quality / cleanliness9.166 Ratings8.044 Ratings7.3121 Ratings
Admin section9.568 Ratings8.443 Ratings8.6131 Ratings
Page templates9.567 Ratings7.045 Ratings8.2128 Ratings
Library of website themes8.658 Ratings9.043 Ratings8.4130 Ratings
Mobile optimization / responsive design10.063 Ratings7.043 Ratings8.5129 Ratings
Publishing workflow9.167 Ratings6.143 Ratings8.5125 Ratings
Form generator10.063 Ratings6.039 Ratings6.3104 Ratings
Web Content Management
Comparison of Web Content Management features of Product A and Product B
Drupal
9.5
67 Ratings
26% above category average
Joomla!
6.6
45 Ratings
10% below category average
WordPress
7.9
131 Ratings
8% above category average
Content taxonomy10.063 Ratings8.044 Ratings6.9113 Ratings
SEO support10.062 Ratings7.044 Ratings8.2118 Ratings
Bulk management10.059 Ratings4.142 Ratings7.5100 Ratings
Availability / breadth of extensions8.761 Ratings8.045 Ratings8.5121 Ratings
Community / comment management9.161 Ratings6.143 Ratings8.5120 Ratings
Best Alternatives
DrupalJoomla!WordPress
Small Businesses
Divi
Divi
Score 9.8 out of 10
Divi
Divi
Score 9.8 out of 10
Divi
Divi
Score 9.8 out of 10
Medium-sized Companies
Image Relay
Image Relay
Score 9.5 out of 10
Image Relay
Image Relay
Score 9.5 out of 10
Image Relay
Image Relay
Score 9.5 out of 10
Enterprises
Tridion
Tridion
Score 9.0 out of 10
Tridion
Tridion
Score 9.0 out of 10
Tridion
Tridion
Score 9.0 out of 10
All AlternativesView all alternativesView all alternativesView all alternatives
User Ratings
DrupalJoomla!WordPress
Likelihood to Recommend
10.0
(77 ratings)
6.1
(68 ratings)
8.9
(169 ratings)
Likelihood to Renew
8.2
(18 ratings)
10.0
(28 ratings)
9.4
(36 ratings)
Usability
10.0
(9 ratings)
9.9
(7 ratings)
9.6
(16 ratings)
Availability
9.7
(3 ratings)
9.9
(2 ratings)
9.5
(3 ratings)
Performance
8.9
(2 ratings)
7.8
(2 ratings)
8.6
(2 ratings)
Support Rating
5.0
(4 ratings)
10.0
(4 ratings)
10.0
(10 ratings)
In-Person Training
8.0
(1 ratings)
-
(0 ratings)
7.0
(1 ratings)
Online Training
6.0
(2 ratings)
8.0
(2 ratings)
10.0
(1 ratings)
Implementation Rating
5.1
(4 ratings)
8.7
(3 ratings)
9.0
(9 ratings)
Configurability
-
(0 ratings)
-
(0 ratings)
10.0
(1 ratings)
Ease of integration
9.0
(1 ratings)
-
(0 ratings)
8.0
(1 ratings)
Product Scalability
8.0
(2 ratings)
9.9
(3 ratings)
10.0
(1 ratings)
Vendor post-sale
-
(0 ratings)
-
(0 ratings)
10.0
(1 ratings)
Vendor pre-sale
-
(0 ratings)
-
(0 ratings)
10.0
(1 ratings)
User Testimonials
DrupalJoomla!WordPress
Likelihood to Recommend
Drupal.org
Well, I'm definitely biased, I've been working with Drupal for 12+ years, and I can say it's appropriate for any size/scale of a project, whether it's a small catalog website or a huge corporation. If I want to dial it down to a specific use case, Drupal is best what most customers/clients that have high-security standards, and need to have extensive editorial experience and control over their website's architecture. Due to its core design, Drupal can connect with each part of its own and any external third-party resources quite easily. For a less-suited scenario, I might say that if you don't have enough budget to get proper work done, sometimes just using WordPress with a pre-designed theme might sound better to you, but if you have the budget and the time, always go with Drupal
Read full review
The Joomla Project
It seems with the release of Joomla! 4 that the weak areas have all been covered. Its always been good for the mid-level small to large business, the blogging was WP, and the large-scale enterprise was probably bespoke. But the new interface is so simple it seems pointless using WP when Joomla! is as easy and can then grow as big as you like. The Workflows feature which allows you to set up work pipelines easily is going to be a boom to any larger enterprise sites. Couples with the new API which I got to see at one of their user groups, is amazing. They were creating articles on one site then another site was taking the feed directly for just certain categories. Really blows your mind what you could do with that and the new workflows.
Read full review
Automattic
If your business relies heavily on content creation, and particularly on blog posts, then WordPress is really the best option you have. But if you don't have a blog, you only need static pages, or you want to build an eCommerce site, then you might want to explore other alternatives.
Read full review
Pros
Drupal.org
  • Content Types... these are amazing. Whereas a more simplistic CMS like Wordpress will basically allow you to make posts and build pages, Drupal 8 gives you the ability to define different types of content that behave differently, and are served up differently in different areas of the website.
  • Extensibility... it scales, ohhhh does it scale. They've really figured out server-side caching, and it makes all the difference. Once a page has been cached, it's available instantly to all users worldwide; and when coupled with AWS, global redundancy and localization mean that no matter where you're accessing the site, it always loads fast and crisp.
  • Workflows... you have the ability to define very specific roles and/or user-based editorial workflows, allowing for as many touchpoints and reviews between content creation and publication as you'll require.
Read full review
The Joomla Project
  • We use Joomla to build our websites and web applications because of its incredible intuitiveness and tools to make everything more manageable.
  • Its working environment is quite comfortable for my development team, and its web design resources significantly speed up our work when carrying out web development projects.
  • It allows you to use blocks to create and visually manage websites and divide them into different categories without programming knowledge.
Read full review
Automattic
  • WordPress is incredibly easy to set up and get running with little to no technical knowledge. Most web hosts will do it for you, since it's so easy.
  • With thousands of themes available for free and for low cost, WordPress can accommodate any design you can imagine.
  • The community behind WordPress is generous, and there are loads of educational opportunities both online and in person to learn and connect with other users.
Read full review
Cons
Drupal.org
  • Security and new release notifications are a hassle as they happen too often
  • Allowing them to write PHP modules is a big advantage, but sometimes integrating them is a small challenge due to the version the developer is working on.
  • Steep learning curve, but worth it
Read full review
The Joomla Project
  • Because Joomla's user community is smaller than WP, it lacks as many choices from 3rd party developers, meaning it can be a little more difficult to find the right extension for what you need to accomplish
  • Along the same vein, most of the best 3rd-party software for Joomla! is paid
  • Simple features such as Add to Menu and Cache cleaners should be adopted as part of the Joomla! core, though they are available as extensions
  • Joomla! could use a simpler and easier URL rewriting process
Read full review
Automattic
  • WordPress breaks often so you need to have someone who understands how to troubleshoot, which can take time and money.
  • Some plugins are easier to customize than others, for example, some don't require any coding knowledge while others do. This can limit your project if you are not a coder.
  • WordPress can be easily hacked, so you also need someone who can ensure your sites are secure.
Read full review
Likelihood to Renew
Drupal.org
The time and money invested into this platform were too great to discontinue it at this point. I'm sure it will be in use for a while. We have also spent time training many employees how to use it. All of these things add up to quite an investment in the product. Lastly, it basically fulfills what we need our intranet site to do.
Read full review
The Joomla Project
I gave it a rating of 10 because I just love how Joomla! works, how it is set up and how it handles many users. Also it is very fast, and there is no overload on the MySQL database or servers ever.
Read full review
Automattic
My rating is based on the knowledge I have of the community that WordPress has had built around it for years now. It's as solid as it comes when you talk about community involvement and expansion. There's no other CMS out there that can match-up with it, hands down.
Read full review
Usability
Drupal.org
It's a great CMS platform and there are a ton of plugins to add some serious functionality, but the security updates are too complex to implement and considering the complexity of the platform, security updates are a must. I don't want my site breached because they make it too difficult to keep it up to date.
Read full review
The Joomla Project
Joomla! 3.x is easily installed either manually or via a script provided by your host. It contains most of the tools needed to begin creating websites right from the start. Those features that it doesn't have are easily installed via links and buttons from the thousands of extensions available in the community
Read full review
Automattic
It's a sophisticated but easy to use piece of software. Many of the content addition pieces are familiar from other pieces of software so there isn't a huge learning curve. And for new areas, there is a lot of info on WordPress.org as well as other WordPress help sites.
Read full review
Reliability and Availability
Drupal.org
Drupal itself does not tend to have bugs that cause sporadic outages. When deployed on a well-configured LAMP stack, deployment and maintenance problems are minimal, and in general no exotic tuning or configuration is required. For highest uptime, putting a caching proxy like Varnish in front of Drupal (or a CDN that supports dynamic applications).
Read full review
The Joomla Project
No answers on this topic
Automattic
Anyone can visit WordPress.org and download a fully functional copy of WordPress free of charge. Additionally, WordPress is offered to users as open-source software, which means that anyone can customize the code to create new applications and make these available to other WordPress users.
Read full review
Performance
Drupal.org
Drupal page loads can be slow, as a great many database calls may be required to generate a page. It is highly recommended to use caching systems, both built-in and external to lessen such database loads and improve performance. I haven't had any problems with behind-the-scenes integrations with external systems.
Read full review
The Joomla Project
Today's Modern Joomla performs very well and is robust and durable. The pages load faster than they ever did in the past and Modern Joomla's integration into other software or systems has become seamless. Modern Joomla sites will last long and will stay running forever.
Read full review
Automattic
Mostly, any performance issues have to do with using too many plugins and these can sometimes slow down the overall performance of your site. It is very tempting to start adding lots of plugins to your WordPress site, however, as there are thousands of great plugins to choose from and so many of them help you do amazing things on your site. If you begin to notice performance issues with your WordPress site (e.g. pages being slow to load), there are ways to optimize the performance of your site, but this requires learning the process. WordPress users can learn how to optimize their WordPress sites by downloading the WPTrainMe WordPress training plugin (WPTrainMe.com) and going through the detailed step-by-step WordPress optimization tutorials.
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Support Rating
Drupal.org
As noted earlier, the support of the community can be rather variable, with some modules attracting more attraction and action in their issue queues, but overall, the development community for Drupal is second to none. It probably the single greatest aspect of being involved in this open-source project.
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The Joomla Project
Between the core Joomla developers who are excellent at answering questions and providing support, you have a whole community of developers who work with Joomla and are happy to help fellow developers out answering questions and supporting the Joomla project. Out of the many communities I am involved in for open-source software, Joomla's community is by far the best.
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Automattic
WordPress itself only has community service so your experience will depend on where you turn. Online, through forums and community boards, support is rudimentary but effective. You can easily turn to your local community and find exceptional individuals who know and use WordPress regularly for more advanced, inexpensive, support. I'm rating this less than 10 because of the lack of any formal support provided by a company.
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In-Person Training
Drupal.org
I was part of the team that conducted the training. Our training was fine, but we could have been better informed on Drupal before we started providing it. If we did not have answers to tough questions, we had more technical staff we could consult with. We did provide hands-on practice time for the learners, which I would always recommend. That is where the best learning occurred.
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The Joomla Project
No answers on this topic
Automattic
Varies by the person providing training. High marks as it's incredibly easy to find experienced individuals in your community to provide training on any aspect of WordPress from content marketing, SEO, plugin development, theme design, etc. Less than 10 though as the training is community based and expectations for a session you find may fall short.
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Online Training
Drupal.org
The on-line training was not as ideal as the face-to-face training. It was done remotely and only allowed for the trainers to present information to the learners and demonstrate the platform online. There was not a good way to allow for the learners to practice, ask questions and have them answered all in the same session.
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The Joomla Project
It is good if you know Joomla! if not it can get a bit confusing
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Automattic
It is very easy to find online resources to learn how to do just about anything with WordPress.
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Implementation Rating
Drupal.org
Plan ahead as much you can. You really need to know how to build what you want with the modules available to you, or that you might need to code yourself, in order to make the best use of Drupal. I recommend you analyze the most technically difficult workflows and other aspects of your implementation, and try building some test versions of those first. Get feedback from stakeholders early and often, because you can easily find yourself in a situation where your implementation does 90% of what you want, but, due to something you didn't plan for, foresee, or know about, there's no feasible way to get past the last 10%
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The Joomla Project
Joomla has gone through tremendous growing pains. It is now better than ever. But before, when it was going from 1.5-2.5, the templates and plugins would break over and over again. If you don't understand what Joomla was trying to do back then, you might have a bad attitude toward it. Today, those pains are over and things don't break like they used to during that time period.
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Automattic
WordPress is not a great solution if you have: 1) A larger site with performance / availability requirements. 2) Multiple types of content you want to share - each with its own underlying data structure. 3) Multiple sites you need to manage. For very small sites where these needs are not paramount, WordPress is a decent solution
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Alternatives Considered
Drupal.org
Drupal is community-backed making it more accessible and growing at a faster rate than Sitefinity which is a proprietary product built on .NET. Drupal is PHP-based using some but not all Symphony codebase. Updates for Drupal are frequent and so are feature adds.
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The Joomla Project
We tested other platforms like WordPress, Magento and some local CMS. 
But Joomla offered us better resources for generating content.
Joomla is a CMS suitable for many types of projects, especially if you have several people editing content at the same time.
It allows you to maintain visual standardization and offers many options for working with images.
With its ability to control access to different articles, categories or even different components, it is a great tool, even if they are managed by different people.
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Automattic
We have considered and operated within Shopify and Squarespace. Both serve their purpose for niche clients, but we do recommend WordPress as being the superior option. We find that WordPress is easier to use and offers maximum scalability while the others are more challenging to design, code, configure and launch.
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Scalability
Drupal.org
Drupal is well known to be scalable, although it requires solid knowledge of MySQL best practices, caching mechanisms, and other server-level best practices. I have never personally dealt with an especially large site, so I can speak well to the issues associated with Drupal scaling.
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The Joomla Project
No answers on this topic
Automattic
WordPress is completely scalable. You can get started immediately with a very simple "out-of-the box" WordPress installation and then add whatever functionality you need as and when you need it, and continue expanding. Often we will create various WordPress sites on the same domain to handle different aspects of our strategy (e.g. one site for the sales pages, product information and/or a marketing blog, another for delivering products securely through a private membership site, and another for running an affiliate program or other application), and then ties all of these sites together using a common theme and links on each of the site's menus. Additionally, WordPress offers a multisite function that allows organizations and institutions to manage networks of sites managed by separate individual site owners, but centrally administered by the parent organization. You can also expand WordPress into a social networking or community site, forums, etc. The same scalability applies to web design. You can start with a simple design and then scale things up to display sites with amazing visual features, including animations and video effects, sliding images and animated product image galleries, elements that appear and fade from visitor browsers, etc. The scaling possibilities of WordPress are truly endless.
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Return on Investment
Drupal.org
  • Drupal has allowed us to build up a library of code and base sites we can reuse to save time which has increased our efficiency and thus had a positive financial impact.
  • Drupal has allowed us to take on projects we otherwise would not have been able to, having a further impact.
  • Drupal has allowed us to build great solutions for our clients which give them an excellent ROI.
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The Joomla Project
  • Joomla has reduced our costs of rolling out a new website because it uses less developer time and can be rolled out by individual users as needed.
  • Joomla has a lot of extensions and add-ons that make it easy to create and implement advanced solutions quickly.
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Automattic
  • WordPress helps us reduce website management costs because we can oversee updates in-house.
  • WordPress is easy to use, reducing the amount of time we spend on website management.
  • The ease of use enables us to offer website management for clients, helping us grow our capabilities/business.
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