Dev tools · alternatives · 2026
24 alternatives to InboxKitten
An open-source, disposable email service 💌
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites, 1 of them free or with a free tier. InboxKitten launched in 2018; newer entries below may have overtaken it.
- 1
Inbox Zeroâ–²821Clean Up Your Inbox In Minutes Newsletter management, AI automation, and email analytics. Inbox Zero is the open-source email app that puts you back in control of your inbox.
2023 · getinboxzero.com · its alternatives →
- 2OS
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 →
- 3
InboxSDKâ–²508First usable API to write Gmail Apps for 1B active users
2015 · inboxsdk.com · its alternatives →
- 4
Inbox Zero Tabsâ–²398Split inbox tabs for Gmail. 100% private. 100% free
2025 · chromewebstore.google.com · its alternatives →
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Inbixâ–²74Cloudflare-native Email Infrastructure for Developers
Jul 2026 · inbix.xyz · its alternatives →
- 7
Maildrop provides free disposable e-mail addresses for use in web forms, app signups, or any other place you'd like to protect your privacy.
2013 · maildrop.cc · its alternatives →
- 8
Mailtrainâ–²323Self hosted newsletter app (Mailchimp clone)
2016 · github.com · its alternatives →
- 9
lockrMailâ–²195Own the power to organize and protect your email inbox
2021 · app.lockrmail.com · its alternatives →
- 10
1SecMailâ–²112Free disposable email that actually arrives in real time
2025 · tmaily.com · its alternatives →
- 11
Forage Mailâ–²306AI that solves email overwhelm. Not another mail app.
2025 · foragemail.com · its alternatives →
- 12
opensend.ccfreeâ–²160The open source email platform that runs on your server
21d ago · opensend.cc · its alternatives →
- 13
Inboxer▲212A clean, open-source desktop client for Google Inbox 💌
2018 · denysdovhan.com · its alternatives →
- 14
The <Inbox /> infrastructure for modern products. Novu has 98 repositories available. Follow their code on GitHub.
2023 · github.com · its alternatives →
- 15
SupportKit.ioâ–²123Speak to users of your mobile app, from inside your inbox.
2014 · its alternatives →
- 16
Skiff Mailâ–²165Private, end-to-end encrypted, open-source mail
2022 · skiff.com · its alternatives →
- 17
Kanmail▲101Hey HN! Been a while.. last post for reference in 2020: https://news.ycombinator.com/item?id=22985055. Moved city, job and had two children since then which is wild :) Been working away shifting Kanmail over to a Go backend (using the excellent wails) and rewriting the frontend in TypeScript. This "new" v2 is much quicker, overcomes a bunch of old limitations (no age limit on paginating folders) and finally gets a working Linux AppImage (*my Linux test setup is somewhat limited and I expect there's plenty of edge cases here - hit me up if you have issues). Anyway, would love…
2020 · kanmail.io · its alternatives →
- 18
- 19CS
Exploring CreatorKit - an OSS Self-Hosting alternative to Mailchimp and Disqus
2023 · servicestack.net · its alternatives →
- 20WM
Hi HN! We're a 5 person team working on simplifying the creation of email apps. Right now, most email services focus on outbound emails (newsletters, transactional, delivery), but that doesn't solve the fact that we all hate receiving them. You can try it at https://mailscript.com Mailscript lets you create programmable email addresses. It works headless, via the CLI, API (we use Swagger to support most languages). You can even run it as a daemon on a server (to run functions when emails arrive). Once you get [email protected], you can create as many aliases as you'd like…
2021 · its alternatives →
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Hello HN! I'm excited to introduce Swift Mail, a native macOS email client purpose-built for the JMAP mail standard. Primarily constructed with SwiftUI and occasional AppKit elements, Swift Mail combines the speed and efficiency of a modern mail standard with desktop-centric features such as system notifications, keyboard shortcuts, quick look, multiple windows, state restoration, dark mode, and more. Swift Mail distinguishes itself from other email clients with its steadfast commitment to the JMAP standard over the traditional IMAP implementation, facilitating seamless alignment with modern…
2024 · swiftmail.io · its alternatives →
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Empower your product manager. Let them decide what the messages to your users say, when those messages are triggered, as well as how they are sent (sms, email, etc.) while you focus on building product features. They'll be able to use trusted providers like sendgrid, twilio and apple so you don't have to worry about message delivery.
2013 · outbound.io · 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 →