head to head · open source
beelzebub vs coi
beelzebub has 2,188 GitHub stars, 213 forks, 5 open issues and last shipped 3 days ago. coi has 732 stars, 64 forks, 29 open issues and last shipped yesterday. beelzebub leads on adoption by 199% (2,188 vs 732 stars). beelzebub is written in Go under GPL-3.0; coi is written in Go under MIT. beelzebub has attracted 10% as many forks as stars, coi 9%. coi 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
| beelzebub | coi | |
|---|---|---|
| GitHub stars | ★ 2.2K | ★ 732 |
| License | GPL-3.0 | MIT |
| Written in | Go | Go |
| Last push | 2026-09-28 | 2026-09-30 |
| Forks | ⑂ 213 | ⑂ 64 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick beelzebub if
- You weight community size — 2.2K stars and counting
- You want the GPL-3.0 license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick coi if
- You want the coi feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Go
- You evaluated both and coi fits your workflow better
About beelzebub
Beelzebub is an open source deception runtime framework written in Go and released under GPL 3.0. It operates in the cybersecurity and AI security ecosystem, where teams need controlled systems that attract and record activity aimed at decoy services. The project is a configurable runtime for honeypots, decoys, and agent facing bait tools, with documentation at docs.beelzebub.ai.
read the full beelzebub overview →
About coi
Coi (Code on Incus) is an MIT licensed Go tool that gives each AI coding agent its own isolated Incus system container — a full Linux machine with root, systemd, and Docker — for developers who want agents to work like they would on a real server without exposing the host or its credentials.
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Frequently asked questions
Is beelzebub or coi more popular?
beelzebub has 2,188 GitHub stars and coi has 732. beelzebub has the larger community by that measure.
Are beelzebub and coi free?
Both are open source. beelzebub is licensed under GPL-3.0 and coi under MIT. Neither carries a licence fee.
What is the difference between beelzebub and coi?
beelzebub is written in Go and coi 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, beelzebub or coi?
Choose beelzebub if you want the larger community (2,188 stars) or its GPL-3.0 licence terms. Choose coi if its feature set, stack or MIT licence fits better. Both are self-hostable.