head to head · open source
huginn vs sloth
huginn has 50,269 GitHub stars, 4,339 forks, 698 open issues and last shipped yesterday. sloth has 2,566 stars, 232 forks, 25 open issues and last shipped 6 days ago. huginn leads on adoption by 1,859% (50,269 vs 2,566 stars). huginn is written in Ruby under MIT; sloth is written in Go under Apache-2.0. huginn has attracted 9% as many forks as stars, sloth 9%. huginn was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (monitoring), 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
| huginn | sloth | |
|---|---|---|
| GitHub stars | ★ 50K | ★ 2.6K |
| License | MIT | Apache-2.0 |
| Written in | Ruby | Go |
| Last push | 2026-11-02 | 2026-10-28 |
| Forks | ⑂ 4.3K | ⑂ 232 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick huginn if
- You weight community size — 50K stars and counting
- You want the MIT license terms
- Your stack matches Ruby
- You value the larger contributor base for long-term maintenance
pick sloth if
- You want the sloth feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Go
- You evaluated both and sloth fits your workflow better
About huginn
What is Huginn? Huginn is a system for building agents that perform automated tasks for you online. They can read the web, watch for events, and take actions on your behalf. Huginn's Agents create and consume events, propagating them along a directed graph. Think of it as a hackable version of IFTTT or Zapier on your own server. You always know who has your data. You do. Here are some of the things that you can do with Huginn: Track the weather and get an email when it's going to rain (or snow) tomorrow ("Don't forget your umbrella!") List terms that you care about and receive email when their occurrence on…
read the full huginn overview →
About sloth
Sloth Project status Sloth is actively maintained and in continuous development. We’re currently working on internal improvements to make Sloth even more extensible and adaptable to real world use cases. While Sloth already supports custom SLI plugins, upcoming changes will bring more flexibility to how SLOs are generated, making it easier to adapt Sloth to your custom needs. Stay tuned for updates! Introduction Meet the easiest way to generate [SLOs][google slo] for Prometheus. Sloth generates understandable, uniform and reliable Prometheus SLOs for any kind of service. Using a simple SLO spec that results in…
read the full sloth overview →
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Frequently asked questions
Is huginn or sloth more popular?
huginn has 50,269 GitHub stars and sloth has 2,566. huginn has the larger community by that measure.
Are huginn and sloth free?
Both are open source. huginn is licensed under MIT and sloth under Apache-2.0. Neither carries a licence fee.
What is the difference between huginn and sloth?
huginn is written in Ruby and sloth 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, huginn or sloth?
Choose huginn if you want the larger community (50,269 stars) or its MIT licence terms. Choose sloth if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.