head to head · open source
OpenViking vs kin-openapi
OpenViking has 41,383 GitHub stars, 3,362 forks, 999 open issues and last shipped yesterday. kin-openapi has 3,318 stars, 538 forks, 114 open issues and last shipped yesterday. OpenViking leads on adoption by 1,147% (41,383 vs 3,318 stars). OpenViking is written in Python under AGPL-3.0; kin-openapi is written in Go under MIT. OpenViking has attracted 8% as many forks as stars, kin-openapi 16%. OpenViking 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
| OpenViking | kin-openapi | |
|---|---|---|
| GitHub stars | ★ 41K | ★ 3.3K |
| License | AGPL-3.0 | MIT |
| Written in | Python | Go |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 3.4K | ⑂ 538 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick OpenViking if
- You weight community size — 41K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick kin-openapi if
- You want the kin-openapi feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Go
- You evaluated both and kin-openapi fits your workflow better
About OpenViking
The Context Database for AI Agents English / 中文 / 日本語 Website · Live Demo · GitHub · Issues · Docs · Blog Lark · WeChat · Discord · X What is OpenViking OpenViking is an open source context database for AI agents — one filesystem for everything an agent knows: knowledge, memory, and skills. Most agent memory is a black box: text goes in, embeddings come out, and nobody can see what was actually stored. OpenViking organizes context as a virtual filesystem under viking:// instead. Agents navigate it like files — ls , tree , read , write , grep — and you can open any directory to inspect and edit what your agent…
read the full OpenViking overview →
About kin-openapi
Introduction A Go project for handling OpenAPI files. We target: OpenAPI v2.0 (formerly known as Swagger) OpenAPI v3.0 OpenAPI v3.1 OpenAPI v3.2 Partially: Media Type Object itemSchema , Path Item Object query (the HTTP QUERY method) and additionalOperations (custom HTTP methods). Licensed under the MIT License. Contributors, users and sponsors The project has received pull requests from many people. Thanks to everyone! Please, give back to this project by becoming a sponsor. Here's some projects that depend on kin openapi : github.com/go fuego/fuego "Framework generating OpenAPI 3 spec from source code"…
read the full kin-openapi overview →
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Frequently asked questions
Is OpenViking or kin-openapi more popular?
OpenViking has 41,383 GitHub stars and kin-openapi has 3,318. OpenViking has the larger community by that measure.
Are OpenViking and kin-openapi free?
Both are open source. OpenViking is licensed under AGPL-3.0 and kin-openapi under MIT. Neither carries a licence fee.
What is the difference between OpenViking and kin-openapi?
OpenViking is written in Python and kin-openapi in Go. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, OpenViking or kin-openapi?
Choose OpenViking if you want the larger community (41,383 stars) or its AGPL-3.0 licence terms. Choose kin-openapi if its feature set, stack or MIT licence fits better. Both are self-hostable.