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120 free browser-based developer utilities. No sign-up required.

Novu
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OneSignal
Twilio
MagicBell
Brevo
Courier is a notification API built for developers. Design once, and deliver to any channel – email, Slack, SMS, push, and more – all through a single API.

Which is more popular?
Based on our record, Courier seems to be more popular. It has been mentioned 3 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | devtoolstack.io | courier.com |
| Pricing | ||
| Company | — | Startup from the United States · 2019 |
| Listed in |
What each product offers, as listed by its team.


Possible disadvantages
Walkthroughs and reviews on video.
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The Courier.com Notifications API Demo
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using DeveloperToolStack and Courier. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


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Courier follows the Design Once Deliver to Many approaches, which makes it possible to design notifications using a single API and deliver them to several channels such as push notifications, direct messages for Slack...
Recommendations tracked on public social media and blogs since March 2021.


Tracking DeveloperToolStack since Aug 2026.
Background: I'm the solo founder of Courier (courier.com). We build APIs that help developers easily build notifications for their products for any channel - email, SMS, Slack, push, inbox, etc. These days we're ~40 people, Series B,... Source: over 3 years ago
Roll your own like me so far, or do you use 3rd-party notification tools like Courier or Knock? Source: over 3 years ago
Courier is ideal for this kind of application since it makes it simple to integrate notification systems. We will be using the Courier API to send email notifications for now, but it is quite easy to extend it to use SMS or other... - Source: dev.to / over 3 years ago
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