head to head · open source
open-code-review vs mantis
open-code-review has 49,287 GitHub stars, 3,614 forks, 160 open issues and last shipped yesterday. mantis has 2,695 stars, 224 forks, 1 open issues and last shipped 4 days ago. open-code-review leads on adoption by 1,729% (49,287 vs 2,695 stars). open-code-review is written in Go under Apache-2.0; mantis is written in Python under Apache-2.0. open-code-review has attracted 7% as many forks as stars, mantis 8%. open-code-review was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (code-review), so they are genuine substitutes rather than adjacent tools.
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
| open-code-review | mantis | |
|---|---|---|
| GitHub stars | ★ 49K | ★ 2.7K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Go | Python |
| Last push | 2026-11-02 | 2026-10-30 |
| Forks | ⑂ 3.6K | ⑂ 224 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick open-code-review if
- You weight community size — 49K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick mantis if
- You want the mantis feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and mantis fits your workflow better
About open-code-review
OpenCodeReview English 简体中文 日本語 한국어 Русский What is Open Code Review? Open Code Review is an AI powered code review CLI tool. It originated as Alibaba Group's internal official AI code review assistant — over the past two years, it has served tens of thousands of developers and identified millions of code defects. After thorough validation at massive scale, we incubated it into an open source project for the community. Simply configure a model endpoint to get started. It reads Git diffs, sends changed files to a configurable LLM via an agent with tool use capabilities, and generates structured review comments…
read the full open-code-review overview →
About mantis
Mantis: Portable Toolkit for Building Secure Software [!CAUTION] USE AT YOUR OWN RISK. BE EXTREMELY CAREFUL. This suite is designed to generate and execute autonomously generated code that may be unstable or perform unexpected actions. USE THIS ONLY IN ISOLATED, RESTRICTED ENVIRONMENTS. Never run this suite on a machine with access to production systems, sensitive data, or internal networks. [!IMPORTANT] RESPONSIBLE USE AI models are non deterministic and can hallucinate findings or generate incorrect patches. All findings must be manually verified by a security expert before being reported. Do not mass file…
read the full mantis overview →
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Frequently asked questions
Is open-code-review or mantis more popular?
open-code-review has 49,287 GitHub stars and mantis has 2,695. open-code-review has the larger community by that measure.
Are open-code-review and mantis free?
Both are open source. open-code-review is licensed under Apache-2.0 and mantis under Apache-2.0. Neither carries a licence fee.
What is the difference between open-code-review and mantis?
open-code-review is written in Go and mantis in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, open-code-review or mantis?
Choose open-code-review if you want the larger community (49,287 stars) or its Apache-2.0 licence terms. Choose mantis if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.