Dev tools · alternatives · 2026
24 alternatives to Open-Sourcing InboxSDK (YC S11) – Build Apps in Gmail
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,…
InboxSDK is an open-source software development kit that enables developers to build browser extension applications for Gmail. It provides a high-level API for inserting user interface elements into Gmail without… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Open-Sourcing InboxSDK (YC S11) – Build Apps in Gmail launched in 2022; newer entries below may have overtaken it.
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InboxSDK▲508First usable API to write Gmail Apps for 1B active users
2015 · inboxsdk.com · its alternatives →
- 2
The InboxSDK is high level Javascript library used to easily build browser extensions that interact with Gmail
2015 · inboxsdk.com · its alternatives →
- 3EE
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 →
- 4
Inbox Zero Tabs▲398Split inbox tabs for Gmail. 100% private. 100% free
2025 · chromewebstore.google.com · its alternatives →
- 5
- 6IM
2013 · khamidou.github.io · its alternatives →
- 7
Create & customize Gmail templates that live in your inbox 💌
2017 · templatesforgmail.com · its alternatives →
- 8
Inboxer▲212A clean, open-source desktop client for Google Inbox 💌
2018 · denysdovhan.com · its alternatives →
- 9
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Hello Inbox▲283Hey HN, I built an email deliverability SaaS with a RAG system. It's trained on all my knowledge and hundreds of real deliverability use cases from 4+ years experience as an Email Deliverability Specialist on Upwork. It solves a frustration problem a lot of businesses are experiencing. I'm looking for feedback so let me know in the comments.
Aug 2026 · helloinbox.email · its alternatives →
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- 14
MailToDock▲70Turn Gmail into Google Tasks with AI-powered
Apr 2026 · mailtodock.vercel.app · its alternatives →
- 15
Ovy▲268One click AI-generated email replies for Gmail
2022 · chromewebstore.google.com · its alternatives →
- 16
A native macOS email client for Gmail
2020 · mimestream.com · its alternatives →
- 17
InboxPro▲174Boost your productivity & turn Gmail into a powerful machine
2022 · inboxpro.io · its alternatives →
- 18
Gmail JavaScript API. Contribute to KartikTalwar/gmail.js development by creating an account on GitHub.
2013 · github.com · its alternatives →
- 19
Drag Pro▲305Transform Gmail into organized To Do lists (like Trello)
2018 · dragapp.com · its alternatives →
- 20
Simplify / Gmail▲255Chrome extension that simplifies Gmail to the bare minimum
2019 · chromewebstore.google.com · its alternatives →
- 21
Free and open-source. Simple alternative to cal.com / calendly, built on Google-App-Script for Gmail users. Built with modern technologies like React, TypeScript, Shadcn/UI, and Vite.
2024 · github.com · its alternatives →
- 22
Drag Free▲207Transform your Gmail into organized task lists
2017 · chromewebstore.google.com · its alternatives →
- 23
Asana for Gmail▲216Turn emails into tasks without leaving your Gmail inbox
2017 · asana.com · its alternatives →
- 24
A privacy-oriented Gmail add on against marketing email
2024 · cleaninboxforgmail.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 →