head to head · open source
Coder vs mantis
Coder has 17,263 GitHub stars, 1,644 forks, 996 open issues and last shipped yesterday. mantis has 2,704 stars, 224 forks, 1 open issues and last shipped 2 days ago. Coder leads on adoption by 538% (17,263 vs 2,704 stars). Coder is written in Go under AGPL-3.0; mantis is written in Python under Apache-2.0. Coder has attracted 10% as many forks as stars, mantis 8%. Coder 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
| Coder | mantis | |
|---|---|---|
| GitHub stars | ★ 17K | ★ 2.7K |
| License | AGPL-3.0 | Apache-2.0 |
| Written in | Go | Python |
| Last push | 2026-11-04 | 2026-11-03 |
| Forks | ⑂ 1.6K | ⑂ 224 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Coder if
- You weight community size — 17K stars and counting
- You want the AGPL-3.0 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 Coder
Self Hosted Cloud Development Environments and AI Agents Quickstart Docs Why Coder Premium Coder is a self hosted platform for cloud development environments and AI coding agents. Workspaces are defined with Terraform, connected through a secure Wireguard® tunnel, and automatically shut down when not used. Coder Agents runs a native AI coding agent whose loop executes in the control plane on your infrastructure, with no API keys in workspaces. Define cloud development environments in Terraform EC2 VMs, Kubernetes Pods, Docker Containers, etc. Automatically shutdown idle resources to save on costs Onboard…
read the full Coder 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 Coder or mantis more popular?
Coder has 17,263 GitHub stars and mantis has 2,704. Coder has the larger community by that measure.
Are Coder and mantis free?
Both are open source. Coder is licensed under AGPL-3.0 and mantis under Apache-2.0. Neither carries a licence fee.
What is the difference between Coder and mantis?
Coder 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, Coder or mantis?
Choose Coder if you want the larger community (17,263 stars) or its AGPL-3.0 licence terms. Choose mantis if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.