head to head · open source
huginn vs nginx-lua-prometheus
huginn has 49,969 GitHub stars, 4,299 forks, 698 open issues and last shipped yesterday. nginx-lua-prometheus has 1,566 stars, 238 forks, 5 open issues and last shipped 8 days ago. huginn leads on adoption by 3,091% (49,969 vs 1,566 stars). huginn is written in Ruby under MIT; nginx-lua-prometheus is written in Lua under MIT. huginn has attracted 9% as many forks as stars, nginx-lua-prometheus 15%. 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 | nginx-lua-prometheus | |
|---|---|---|
| GitHub stars | ★ 50K | ★ 1.6K |
| License | MIT | MIT |
| Written in | Ruby | Lua |
| Last push | 2026-09-18 | 2026-09-11 |
| Forks | ⑂ 4.3K | ⑂ 238 |
| 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 nginx-lua-prometheus if
- You want the nginx-lua-prometheus feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Lua
- You evaluated both and nginx-lua-prometheus fits your workflow better
About huginn
Huginn is an open source system for building agents that perform automated tasks online, written in Ruby and released under the MIT license. Its agents read the web, watch for events, and take actions on the user's behalf. Internally, agents create and consume events that propagate along a directed graph, which means one agent's output becomes another agent's input and a chain of small steps can be composed into a larger workflow. The project lives in the Ruby ecosystem and is distributed as an official Docker image or installed locally from a forked repository.
read the full huginn overview →
About nginx-lua-prometheus
nginx lua prometheus is an MIT licensed Lua library that lets Nginx record counters, gauges, and histograms inside a shared dictionary and expose them on a dedicated HTTP endpoint for Prometheus to scrape, and it is aimed at operators running OpenResty or a Lua enabled Nginx who want to instrument the request path directly rather than through a sidecar.
read the full nginx-lua-prometheus overview →
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Frequently asked questions
Is huginn or nginx-lua-prometheus more popular?
huginn has 49,969 GitHub stars and nginx-lua-prometheus has 1,566. huginn has the larger community by that measure.
Are huginn and nginx-lua-prometheus free?
Both are open source. huginn is licensed under MIT and nginx-lua-prometheus under MIT. Neither carries a licence fee.
What is the difference between huginn and nginx-lua-prometheus?
huginn is written in Ruby and nginx-lua-prometheus in Lua. 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 nginx-lua-prometheus?
Choose huginn if you want the larger community (49,969 stars) or its MIT licence terms. Choose nginx-lua-prometheus if its feature set, stack or MIT licence fits better. Both are self-hostable.