InboxSDK by Streak (YC S11) – Build Apps inside Gmail
The InboxSDK is high level Javascript library used to easily build browser extensions that interact with Gmail
InboxSDK by Streak (YC S11) – Build Apps inside Gmail launched on May 21, 2015 with 176 votes, #132 of 3,670 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 11 years on.
In plain words
InboxSDK is a JavaScript library that enables developers to build browser extensions for Gmail without directly manipulating its underlying code structure. It provides high-level classes and straightforward methods that abstract away Gmail's DOM complexity, allowing developers to add custom UI elements, buttons, and functionality. The library eliminates the need to find selectors, test multiple Gmail configurations, or worry about breaking changes when Gmail updates, making it easier for developers to create extensions that interact with Gmail's interface.
written from the facts on this page · September 2026
From the sources
Using the InboxSDK means no more lost time hacking Gmail's DOM. No more finding intricate selectors to insert your own UI. No more testing every configuration of Gmail to make sure everything still works. No more guessing how the compose area will appear. No more late nights when Gmail slightly changes their DOM. Instead, with InboxSDK, you interact with simple high level classes like ComposeView. You call straightforward methods (like adding buttons or getting the subject) on the class and the SDK abstracts the entire DOM away from you. Gmail is the standard communication platform for hundreds of millions of people. Plus, with millions of paid Google Apps users, applications built on the…from inboxsdk.com
Does a similar job
all alternatives →- OSOpen-Sourcing InboxSDK (YC S11) – Build Apps in Gmail2022 · ▲257
Hi HN! We’re Aleem, Chris, Borys, Meichen and Zach from Streak (YC S11) and today we’re open sourcing our InboxSDK https://www.inboxsdk.com, which makes it easy to build apps for Gmail. Over 1.8B users spend their days in Gmail! Having your app built into the Gmail workflow is a better user experience and gives you great user retention. InboxSDK gives you a high-level, declarative API to insert your UI into Gmail without having to directly manipulate the DOM yourself. End users install a browser extension to use your app. The SDK can add UI to multiple areas of Gmail. For example,…
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