head to head · open source
Bluesky vs postmarks
Bluesky has 18,364 GitHub stars, 2,872 forks, 2,400 open issues and last shipped yesterday. postmarks has 547 stars, 43 forks, 78 open issues and last shipped 6 months ago. Bluesky leads on adoption by 3,257% (18,364 vs 547 stars). Bluesky is written in TypeScript under MIT; postmarks is written in JavaScript under MIT. Bluesky has attracted 16% as many forks as stars, postmarks 8%. Bluesky was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Bluesky | postmarks | |
|---|---|---|
| GitHub stars | ★ 18K | ★ 547 |
| License | MIT | MIT |
| Written in | TypeScript | JavaScript |
| Last push | 2026-11-02 | 2026-05-15 |
| Forks | ⑂ 2.9K | ⑂ 43 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Bluesky if
- You weight community size — 18K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick postmarks if
- You want the postmarks feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches JavaScript
- You evaluated both and postmarks fits your workflow better
About Bluesky
Bluesky Social App Welcome friends! This is the codebase for the Bluesky Social app. Get the app itself: Web: bsky.app iOS: App Store Android: Play Store Development Resources This is a React Native application, written in the TypeScript programming language. It builds on the atproto TypeScript packages (like @atproto/api ), which are also open source, but in a different git repository. There is a small amount of Go language source code (in ./bskyweb/ ), for a web service that returns the React Native Web application. The Build Instructions are a good place to get started with the app itself. The Authenticated…
read the full Bluesky overview →
About postmarks
Postmarks About this project Postmarks is a bookmarking site that you own yourself and can connect the Fediverse, interacting with other Postmarks sites as well as Mastodon/FireFish/any text based ActivityPub platform. You can read more about it here: Getting Started Ethos Future Ideas The site allows the owner to add, edit and delete bookmarks, but only if a valid login is provided. Check the setup below to understand how to do that! Setting up your site To set your app up: Create a .env file in the root of the project. Add the line PUBLIC BASE URL= to your .env where \ is the hostname of your instance. Add the…
read the full postmarks overview →
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Frequently asked questions
Is Bluesky or postmarks more popular?
Bluesky has 18,364 GitHub stars and postmarks has 547. Bluesky has the larger community by that measure.
Are Bluesky and postmarks free?
Both are open source. Bluesky is licensed under MIT and postmarks under MIT. Neither carries a licence fee.
What is the difference between Bluesky and postmarks?
Bluesky is written in TypeScript and postmarks in JavaScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Bluesky or postmarks?
Choose Bluesky if you want the larger community (18,364 stars) or its MIT licence terms. Choose postmarks if its feature set, stack or MIT licence fits better. Both are self-hostable.