Life & fun · alternatives · 2026
24 alternatives to 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 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… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. InboxSDK by Streak (YC S11) – Build Apps inside Gmail launched in 2015; newer entries below may have overtaken it.
- 1OS
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,…
2022 · its alternatives →
- 2
InboxSDK▲508First usable API to write Gmail Apps for 1B active users
2015 · inboxsdk.com · its alternatives →
- 3
Inbox Zero Tabs▲398Split inbox tabs for Gmail. 100% private. 100% free
2025 · chromewebstore.google.com · its alternatives →
- 4
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Create & customize Gmail templates that live in your inbox 💌
2017 · templatesforgmail.com · its alternatives →
- 6
MailtoUI.js▲357Enhance your mailto links with a convenient user interface.
2019 · mailtoui.com · its alternatives →
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Simplify / Gmail▲255Chrome extension that simplifies Gmail to the bare minimum
2019 · chromewebstore.google.com · its alternatives →
- 9
I got frustrated with Gmail's lack of customization, and built an extension for myself. It doesn't do much other than modify how Gmail is displayed in Chrome. Does it as minimally as possible (that I can engineer). Done locally, zero remote processing. Currently built the following settings (want to add more soon): Conversations: * Show newest message first * Show every message in a thread (sometimes they're collapsed into numbered bubbles) * Remove AI overviews (retches) Layout/UI: * Minimize the search & top bar * Minimize the far left "rail" (Mail/Chat/Meet) * Hide a bunch…
Mar 2026 · chromewebstore.google.com · its alternatives →
- 10
Gmail JavaScript API. Contribute to KartikTalwar/gmail.js development by creating an account on GitHub.
2013 · github.com · its alternatives →
- 11
A native macOS email client for Gmail
2020 · mimestream.com · its alternatives →
- 12
Preview, analyze & test emails with one click
2022 · inboxpirates.com · its alternatives →
- 13
The ultimate toolbox to control sending/receiving emails
2014 · boomeranggmail.com · its alternatives →
- 14
it will contain different utilities for GMail API over OAuth2 - abhishekkr/gmail-helper
2020 · github.com · its alternatives →
- 15
Your Gmail Contacts. On steroids.
2014 · fullcontact.com · its alternatives →
- 16EE
Manage sales and customer relationships directly inside Gmail. Streak is the CRM your team will actually use—integrated, smart, and loved by 750,000+ users.
2013 · streak.com · its alternatives →
- 17
MailToDock▲70Turn Gmail into Google Tasks with AI-powered
Apr 2026 · mailtodock.vercel.app · its alternatives →
- 18
The Gmail experience you deserve with one Chrome extension
2023 · mailtaco.gumroad.com · its alternatives →
- 19
Inbox When Ready▲116Protect your focus... hide your Gmail inbox by default
2016 · chromewebstore.google.com · its alternatives →
- 20
Hi everyone, My motivation for building this was to address the trouble of mass unsubscribing from unwanted emails and deleting bulk emails while ensuring privacy and control over the process. With this Chrome extension, emails are not sent to any external servers. All calls to the Gmail API happen locally on your device. Feedback and suggestions are welcome!
2024 · inboxpurge.com · its alternatives →
- 21
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Hyperise Beta▲2482X your email CTR with dynamic personalised images.
2019 · chromewebstore.google.com · its alternatives →
- 23
Ovy▲268One click AI-generated email replies for Gmail
2022 · chromewebstore.google.com · its alternatives →
- 24
Inboxer▲212A clean, open-source desktop client for Google Inbox 💌
2018 · denysdovhan.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →