head to head · open source
huginn vs viztracer
huginn has 49,967 GitHub stars, 4,298 forks, 698 open issues and last shipped 2 days ago. viztracer has 7,743 stars, 475 forks, 33 open issues and last shipped yesterday. huginn leads on adoption by 545% (49,967 vs 7,743 stars). huginn is written in Ruby under MIT; viztracer is written in Python under Apache-2.0. huginn has attracted 9% as many forks as stars, viztracer 6%. viztracer 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
| huginn | viztracer | |
|---|---|---|
| GitHub stars | ★ 50K | ★ 7.7K |
| License | MIT | Apache-2.0 |
| Written in | Ruby | Python |
| Last push | 2026-09-16 | 2026-09-17 |
| Forks | ⑂ 4.3K | ⑂ 475 |
| 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 viztracer if
- You want the viztracer 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 viztracer 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 viztracer
VizTracer is a low overhead Python tracing, debugging and profiling tool that records code execution and renders it as an interactive timeline with source code, built for Python developers who need to see what their scripts, threads, subprocesses, async tasks and PyTorch calls are actually doing.
read the full viztracer overview →
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Frequently asked questions
Is huginn or viztracer more popular?
huginn has 49,967 GitHub stars and viztracer has 7,743. huginn has the larger community by that measure.
Are huginn and viztracer free?
Both are open source. huginn is licensed under MIT and viztracer under Apache-2.0. Neither carries a licence fee.
What is the difference between huginn and viztracer?
huginn is written in Ruby and viztracer 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, huginn or viztracer?
Choose huginn if you want the larger community (49,967 stars) or its MIT licence terms. Choose viztracer if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.