Espial vs Promnesia
A side-by-side comparison of two self-hosted bookmarks & read-it-later options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Espial | Promnesia |
|---|---|---|
| Deploy effort | Under-an-hour setup | Read-the-docs project |
| Health score | 80 · Excellent | 83 · Excellent |
| Category | Bookmarks & Read-It-Later | Bookmarks & Read-It-Later |
| License | AGPL-3.0 | MIT |
| Language | Haskell | Python |
| Setup difficulty | Medium | Hard |
| Min. RAM | 128 MB | 256 MB |
| Deployment | docker, binary | binary, source |
| GitHub stars | ★ 919 | ★ 1,900 |
| First released | 2019 | 2019 |
| Replaces | Pinboard, Pocket | Pocket, Raindrop.io |
What are Espial and Promnesia?
Espial
Espial is an open-source, web-based bookmarking server that you can deploy yourself. It is inspired by Pinboard and supports tagging, private and public bookmarks, and import from Pinboard.
- Pinboard-style bookmarking
- Public and private bookmarks
- Pinboard import support
Promnesia
Promnesia is a browser extension and backend that helps you remember which pages you have visited and how. It connects your browsing history with bookmarks, notes, and other tools.
- Annotates pages you have visited
- Connects history with notes
- Local data ownership
Espial vs Promnesia: key differences
Espial is written in Haskell, while Promnesia is built with Python. Licensing differs — AGPL-3.0 for Espial versus MIT for Promnesia. Espial is the lighter option, starting around 128 MB of RAM against 256 MB for Promnesia. Promnesia has the considerably larger community, at 1,900 GitHub stars versus 919. Espial lists first-class Docker deployment; Promnesia does not.
Why pick each one
Choose Espial if…
- Released under the AGPL-3.0 license
- First-class Docker support for quick deployment
- Written in Haskell
- Tiny footprint — runs in 128 MB RAM
Choose Promnesia if…
- Released under the MIT license
- Active community (1.9k GitHub stars)
- Written in Python
- Tiny footprint — runs in 256 MB RAM
Frequently asked questions
Is Espial or Promnesia better?
Neither is universally better. Promnesia has the larger community, while Espial is simpler to set up (medium difficulty). Choose based on the comparison table above and your own setup.
Are Espial and Promnesia free and open-source?
Yes. Espial is licensed under AGPL-3.0 and Promnesia under MIT. Both can be self-hosted at no software cost.
Can I run Espial and Promnesia with Docker?
Espial: yes. Promnesia: check the project docs for container support.
Which is lighter on resources, Espial or Promnesia?
Espial has the smaller minimum footprint at 128 MB of RAM, compared to about 256 MB for Promnesia. Real-world usage depends on library size, user count, and enabled features.