Customer.io vs. Twilio SendGrid

Overview
ProductRatingMost Used ByProduct SummaryStarting Price
Customer.io
Score 8.4 out of 10
Small Businesses (1-50 employees)
Customer.io is a customer engagement platform that enables marketers to build sophisticated automated messaging campaigns. With access to real-time behavioral data, users can create personalized and relevant messages to engage and retain customers. This includes sending emails, push notifications, SMS, in-app messages, and more through a visual building experience. Built for scale, Customer.io boasts users among over 5,300 companies, sending over 17 billion messages per year.
$100
per month
Twilio SendGrid
Score 7.4 out of 10
N/A
Twilio SendGrid Marketing Campaigns provides users with segmentation, campaign editing, and deliverability. According to the vendor, Twilio SendGrid Marketing Campaigns is trusted by over 80,000 customers globally, including Airbnb, Spotify and Uber. Twilio SendGrid Marketing Campaigns aims to help users by providing: MORE EFFICIENT EMAIL BUILDING The campaign building process is free from frustrating, rigid step-by-step wizards that slow users down. The vendor says…
$15
per month
Pricing
Customer.ioTwilio SendGrid
Editions & Modules
No answers on this topic
Basic
$15
per month
Advanced
$60
per month
Free
Free
Offerings
Pricing Offerings
Customer.ioTwilio SendGrid
Free Trial
YesNo
Free/Freemium Version
NoNo
Premium Consulting/Integration Services
YesNo
Entry-level Setup FeeOptionalNo setup fee
Additional DetailsEssentials: For startups and small teams engaging customers on their mobile and web apps. - Up to 5,000 profiles*, Send Emails, Push, In-App, and SMS, Visual Workflow Builder, Segmentation, Two Workspaces, Email Support, Customer Community Premium: For high-growth companies looking for greater control over their messaging outcomes. - Everything in Essentials, Custom Data + Message Volume, Premium Product Features, Additional Workspaces, 90-day Onboarding Program, Premium Email & Chat Support, Managed Deliverability, Dedicated IPs, Parcel Pro Licenses, HIPAA Compliance Enterprise: For at-scale companies looking to create world-class customer experiences. - Everything in Premium, Managed Infrastructure*, Customer Success Manager, Quarterly Success Reviews, Technical Account Manager*, Audit Logging & Data Governance*, Parcel Business Licenses, Migration Support*, *Available by consultation.
More Pricing Information
Community Pulse
Customer.ioTwilio SendGrid
Considered Both Products
Customer.io
Chose Customer.io
Customer.io is much more comprehensive and powerful. It takes some getting used to but once you understand how it works, you have a ton of control when it comes to email marketing.
Chose Customer.io
Customer.io was really the first pure, full-featured drip email program on the market and as far as I know, it's still the simplest and best overall for that specific function. SendGrid has also added drip campaign features, but I would seriously evaluate Customer.io against …
Twilio SendGrid

No answer on this topic

Top Pros
Top Cons
Features
Customer.ioTwilio SendGrid
Email & Online Marketing
Comparison of Email & Online Marketing features of Product A and Product B
Customer.io
-
Ratings
Twilio SendGrid
7.7
46 Ratings
5% below category average
WYSIWYG email editor00 Ratings7.733 Ratings
Dynamic content00 Ratings7.936 Ratings
Ability to test dynamic content00 Ratings8.034 Ratings
Landing pages00 Ratings7.522 Ratings
A/B testing00 Ratings8.526 Ratings
Mobile optimization00 Ratings9.034 Ratings
Email deliverability reporting00 Ratings7.546 Ratings
List management00 Ratings5.940 Ratings
Triggered drip sequences00 Ratings7.520 Ratings
Reporting & Analytics
Comparison of Reporting & Analytics features of Product A and Product B
Customer.io
-
Ratings
Twilio SendGrid
8.0
46 Ratings
4% above category average
Dashboards00 Ratings8.544 Ratings
Standard reports00 Ratings8.544 Ratings
Custom reports00 Ratings7.028 Ratings
Pre-Send Testing
Comparison of Pre-Send Testing features of Product A and Product B
Customer.io
-
Ratings
Twilio SendGrid
9.1
8 Ratings
7% above category average
URL Validation00 Ratings9.38 Ratings
Link Tracking00 Ratings9.08 Ratings
Image Validation00 Ratings9.07 Ratings
Inbox Display00 Ratings9.38 Ratings
Email Accessibility Tools00 Ratings9.08 Ratings
Spelling and Grammar Check00 Ratings8.66 Ratings
Spam Testing00 Ratings9.38 Ratings
Email Previews00 Ratings9.08 Ratings
Best Alternatives
Customer.ioTwilio SendGrid
Small Businesses
Simplify360
Simplify360
Score 7.8 out of 10
VerticalResponse
VerticalResponse
Score 10.0 out of 10
Medium-sized Companies
Bright Pattern Contact Center
Bright Pattern Contact Center
Score 10.0 out of 10
VerticalResponse
VerticalResponse
Score 10.0 out of 10
Enterprises
Conversica
Conversica
Score 9.4 out of 10
Emma by Marigold
Emma by Marigold
Score 8.6 out of 10
All AlternativesView all alternativesView all alternatives
User Ratings
Customer.ioTwilio SendGrid
Likelihood to Recommend
9.8
(8 ratings)
5.5
(57 ratings)
Likelihood to Renew
-
(0 ratings)
7.0
(1 ratings)
Usability
-
(0 ratings)
1.0
(4 ratings)
Support Rating
-
(0 ratings)
3.0
(9 ratings)
User Testimonials
Customer.ioTwilio SendGrid
Likelihood to Recommend
Customer.io
This tool is well-suited for companies looking to run email marketing campaigns or send out newsletters regularly to their users/customers. The workflow setup is especially useful for companies who want to send specific emails based on user behavior - i.e. they've not logged in recently, have bought a specific product, haven't opened any emails, etc. This could also be useful for freelancers like me since you can create different workspaces within Customer.io. I have configured it this way to handle email marketing for a few of my clients, and the software keeps everything organized and separate. This might not be the best tool for small businesses, considering the price. It may be better to start out with a cheaper email marketing tool, and then if/when necessary, scale-up with a tool like Customer.io.
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Twilio
I think Sendgrid is a great tool for sending out emails of all types. I've primarily used it for transactional emails as we've had other solutions for marketing emails, but I'm sure it would do just a good job - there is a "Marketing" section within the app you can use. Sendgrid integrates really easily with the development frameworks I've used, such as Laravel and Lumen; I've also integrated it with Moodle with ease.
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Pros
Customer.io
  • Managing users, attributes and events. You are easily able to modify any user, based on their ID, and add or remove attributes, assign events to them. That makes it very easy to segment later and to assign them to several campaigns based on behavior. Just a warning: this integration isn't so easy (at least it wasn't for us).
  • Creating workflows of campaigns is very easy. You can quickly create behavioral campaigns based on attributes, segments and add elements to the workflow. You can send an email, then wait, then send another, then exit the campaign if they converted, etc. The workflow is easy to configure and very powerful for automation.
  • We don't use many email templates (we make them in MJML) but it's very easy to add senders, to change templates and in general to test designs.
  • Deliverability works very well, at least for us. It sends emails pretty fast and without issues.
  • Exporting is very quick and easy. Importing wasn't a feature until recently, but it works well too.
  • Seeing activity it's also useful. In general, logs are awesome (be it of a customer, of activity on the site, email sends, etc.).
  • We don't use environments, but it might be very useful for a bigger company.
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Twilio
  • Managing email lists / audiences is easy with features like groups and segments.
  • They provide pre-built email templates that are very easy to modify. It is also super easy to create new email templates with their drag-and-drop email builder.
  • Provides clear / easy-to-read analytics of email campaigns.
  • I can easily import large email contact lists all at once or add a user manually one-at-a-time, when needed.
Read full review
Cons
Customer.io
  • Push notifications are very rudimentary. Everything has to be done by hand unless you're sending an extremely simple message.
  • A bit too email centric.
  • Lacks an ability to schedule messages on a daily, weekly, etc. basis.
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Twilio
  • Not necessarily their Email API but their email in general - they are currently in beta for automated email sequences but are still bare bones. Much more work is needed before it can be used mainstream and be able to convert everything to SendGrid.
  • Helping with warming up our dedicated IP for the best-sending score.
  • We seem to hit the promotions folder a decent amount (maybe the IP problem above) and even a lot of their emails hit my spam or promotions folder (whether they be transactional or marketing) which isn't a great sign when trusting an ESP.
  • Transactional email sequences would be a huge plus.
  • Now that Twilio owns SenGrid, having an integrated platform where you could see all our transactional emails together.
  • Better reporting and split reporting between transactional and marketing emails.
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Usability
Customer.io
No answers on this topic
Twilio
It has the potential to be really cool. However, it feels as if it was created by developers for developers (and I work with developers, yet even for me the instrument was somewhat not easy to use - just read SendGrid's help manuals...) However, if you are into data and your way of thinking is more mathematical rather than lyrical, you'll enjoy this instrument
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Support Rating
Customer.io
No answers on this topic
Twilio
Twilio SendGrid Email API is everything we want it to be, and we have no reason to look for any other solution. Features and pricing match exactly what we need. As developers for SaaS products, Twilio SendGrid Email API provides a great service. I hope that they stay this way and don't inflate the service with too many marketing oriented features, because there are other tools for that and Twilio SendGrid Email API is a API for sending email first and foremost.
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Alternatives Considered
Customer.io
Customer.io was really the first pure, full-featured drip email program on the market and as far as I know, it's still the simplest and best overall for that specific function. SendGrid has also added drip campaign features, but I would seriously evaluate Customer.io against any other drip email provider because they really have all the key elements you need to make it work.
Read full review
Twilio
If given a choice between the two, I would pick Mandrill over SendGrid. Mandrill is slightly more expensive but the data & reports that you receive from it make the service worth it. Mandrill lets you export reports over a period of time, view the actual content of emails that you've dispatched and the customer support is way better. If you can bear the slightly higher cost, Mandrill would be a better choice.
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Return on Investment
Customer.io
  • Fast testing for new products to specific groups. It saves a lot of time and money.
  • Removed workload from marketing = more time to make it better.
  • Better contact with specific groups, seeing a increase in sales because of this.
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Twilio
  • Our clients experience significant ROI from their web forms - without receipt of forms, many of them would not still be in business.
  • As a solution for clients' sites, we find SendGrid is a fast installation and a 1 stop problem solver, saving us man-hours.
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ScreenShots

Customer.io Screenshots

Screenshot of data-driven or manual segments that can be created in the no-code builder for recipient lists, campaign triggers, filters, and conversion goals.Screenshot of the code editor for email, that helps navigate code and iterate.Screenshot of account performance, visible at a glance from the Dashboard view.Screenshot of drag and drop messages, time delays, and branches where desired, to build cross-channel campaigns.Screenshot of triggered campaigns based on forms submissions, customer attributes, customer actions, and dates.Screenshot of localization for global audiences. One message can be delivered in multiple languages.