AWS Lambda vs. Heroku Platform

Scenarios where AWS Lambda is well suited: 1. When we need to run a periodic task few times in a day or every hour, we may deploy it on AWS Lambda so it would not increase load on our server which is handling client requests and at the same time we don't have to pay for AWS Lambda when it is not running. So, overall we only pay for few function invocations. 2. When some compute intensive processing is to be done but the number of requests per unit of time fluctuates. For example, we had deployed an AWS Lambda for processing images into different sizes and storing them on AWS S3 once user uploads them. Now, this is something that may happen few times every hour on a particular day or may not happen even once on other days. To handle this kind of tasks AWS Lambda is a better choice as we don't have to pay for the idle time of the server and also we don't have to worry about scaling when the load is high. Scenarios where AWS Lambda is not appropriate to use: 1. When we expect a large request volume continuously on the server. 2. When we don't want latency even in case of concurrent requests.

Incentivized

Heroku is very well-suited to early stage and/or rapidly changing projects. It is great for getting moving quickly or changing direction quickly. In scenarios where there is already scale or well-defined requirements, it may be preferable to set things up directly on AWS or another cloud provider to avoid the additional costs of Heroku as the middleman.

Incentivized

• AWS Lambda is a welcoming platform, supporting several languages, including Java, Go, PowerShell, Node.js, C#, Python, and Ruby. And if you need to deploy a Lambda function in another language, AWS offers a Runtime API for integration.
• We really appreciate how AWS Lambda is always-on for our functions, with only a brief "cold-start" waiting period the first time a function is called after being dormant.
• In addition to only generating costs when it's actually being used, AWS Lambda really puts the "serverless" in serverless architecture, offering turnkey scaleability and high availability for our code with zero effort on our part.

Incentivized

• Amazingly clear and straightforward documentation (versus the quagmire of AWS docs).
• Deploy your entire site in one command.
• Setting up asynchronous job processing for long running operations (e.g. sending emails, making external API calls).
• A wonderful portfolio of tightly-integrated add-ons in their marketplace.

Incentivized

• The UI and Developer experience is not so great. IF you use an abstraction like Serverless Application Model (SAM), things get pretty easy, but it's still AWS UI/DX you're working with after that (which is to say, not their strength).
• Documentation is always a mixed bag. Sometimes it's just easier to google your specific problem and see how others have solved it. This can be much faster than trying to find an example that may or may not be there in the documentation (which oftentimes has multiple versions and revisions).

Incentivized

• Could be less expensive, although you get what you pay for
• Sleeping apps can be an annoyance: Heroku automatically puts your apps in sleep mode and they have to spin back up after periods of inactivity. Much of this can be solved but it requires working around the built-in functionality. I understand why they do it but it's an area that could be improved.
• Restrictions to server access means you can't customize as much as you could if you owned the server. But again, this is also a benefit because it's about convention over configuration. So you can't configure as much, but then, you typically don't have to.

Incentivized

Heroku is a critical and core part of our infrastructure that is serving our customers well. We are very satisfied with the cost of our solution. While it would be difficult to move away from Heroku, we have no plans to do so. We have had no major issues with it and it is a pleasure to use. Other products on the market might offer comparable functionality, but until we expose a need that Heroku cannot satisfy, we'll stay the course.

Incentivized

It is very easy to get started with AWS Lambda and create your first function. The user interface makes it easy to add AWS services to be inputs or outputs to the function, meaning it can be configured in many different ways for different needs. This makes it ideal for various scenarios in AWS.

Incentivized

Deploying apps, scaling , managing environment is very simple. Clean interface for logs, metrics and app settings. Deployment is fast. Don't need deep knowledege of devops or cloud. Buildpacks, pipelines, and review apps makes work easier. Detailed guides help solve common problems fast.


Pricing is higher at scale. Autoscaling options are limited.

Incentivized

Heroku availability correlates pretty strongly to AWS US EAST availability. We had a couple of times where there was a Heroku-specific issue but not for the last 7-8 months.

The only issue that I ever have is that about 1 out of 20 deployments (git push) will hang and need to be cancelled and done again.

As this is a product where a great part of errors can be at the source code level, AWS support team doesn't dive that further. I mean they don't evaluate problems more complex related to your code, [which] is totally understandable, but this make[s] debug process more tough and painful.

Incentivized

I've used it for many years without facing any major problem. It's not hard at all to get used to it, it's documentation is outstanding and simple. We are close to 2020 and I don't think most of the existing companies or startups should still face old problems such as wasting time deploying code and calculate computing resources.

Incentivized

Be ready to pay a bit more than expected in the beginning if you're migrating from a big server. The application is probably not ready for the change and you have to keep improving it with time.

It's also important to consider that you can't save anything to the disc as it will be lost when your application restarts, so you have to think about using something like S3.

Incentivized

It's fine, it works as the others would have, except EC2. We are migrating back to EC2 for dedicated compute because we have scaled to a point where we have consistent traffic. The tradeoff of maintaining infrastructure in-house outweighs the benefits of moving quickly through our roadmap.

Incentivized

Heroku has advantages over Docker, Google App Engine and AWS products, but it depends largely on your use case. If you are already in AWS, it's probably in your best interest to stay with AWS products. However, other "Cloud Formation/Orchestration" products like Docker are typically lacking the ease-of-use factor that allows you to get up and running with Heroku quickly.

Incentivized

• We have simplified log fiie ingestion using Lambda functions. The return has been less time worrying about getting logs from source to ingestion; one the process is in place the team is nearly 100% hands off.
• We have begun taking a more API focused approach by using API Gateway as the interface to business processes and Lambda as the back end compute. Moving away from server based back ends places us on a path to reducing overall spend in compute costs.
• Lambda functions allow us to easily interface with third party services through APIs. This simplifies access management since the function can be granted permissions and access to the function can be gated with API keys and other authentication methods.

Incentivized

• It has been critical in seamlessly operating our platform with runs all of our programs.
• It has been impressive with its ability to scale quickly which results in the growth of our work.
• It allows for tracking of different features which allows for quick problem solving which saves us time.