head to head · open source
devdocs vs utopia
devdocs has 39,461 GitHub stars, 2,643 forks, 196 open issues and last shipped 3 days ago. utopia has 7,976 stars, 1,025 forks, 27 open issues and last shipped yesterday. devdocs leads on adoption by 395% (39,461 vs 7,976 stars). devdocs is written in Ruby under MPL-2.0; utopia is written in Rust under Apache-2.0. devdocs has attracted 7% as many forks as stars, utopia 13%. utopia 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
| devdocs | utopia | |
|---|---|---|
| GitHub stars | ★ 39K | ★ 8.0K |
| License | MPL-2.0 | Apache-2.0 |
| Written in | Ruby | Rust |
| Last push | 2026-09-15 | 2026-09-17 |
| Forks | ⑂ 2.6K | ⑂ 1.0K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick devdocs if
- You weight community size — 39K stars and counting
- You want the MPL-2.0 license terms
- Your stack matches Ruby
- You value the larger contributor base for long-term maintenance
pick utopia if
- You want the utopia feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Rust
- You evaluated both and utopia fits your workflow better
About devdocs
DevDocs is an API documentation browser that combines multiple developer documentations into a single, clean and organized web UI with instant search, offline support, a mobile version, a dark theme and keyboard shortcuts, and it is aimed at developers who need to read and search API and reference documentation quickly.
read the full devdocs overview →
About utopia
Utopia is the world's first open source enterprise world model: a self hosted knowledge substrate with a bitemporal graph and an ontology at its base layer, built by DeepLethe for teams that need agent memory, governed knowledge, and a trustworthy decision core running on hardware they control.
read the full utopia overview →
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Frequently asked questions
Is devdocs or utopia more popular?
devdocs has 39,461 GitHub stars and utopia has 7,976. devdocs has the larger community by that measure.
Are devdocs and utopia free?
Both are open source. devdocs is licensed under MPL-2.0 and utopia under Apache-2.0. Neither carries a licence fee.
What is the difference between devdocs and utopia?
devdocs is written in Ruby and utopia in Rust. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, devdocs or utopia?
Choose devdocs if you want the larger community (39,461 stars) or its MPL-2.0 licence terms. Choose utopia if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.