head to head · open source
gofr vs viztracer
gofr has 20,909 GitHub stars, 1,760 forks, 132 open issues and last shipped 2 days ago. viztracer has 7,746 stars, 475 forks, 33 open issues and last shipped 2 days ago. gofr leads on adoption by 170% (20,909 vs 7,746 stars). gofr is written in Go under Apache-2.0; viztracer is written in Python under Apache-2.0. gofr has attracted 8% as many forks as stars, viztracer 6%. gofr was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (logging), 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
| gofr | viztracer | |
|---|---|---|
| GitHub stars | ★ 21K | ★ 7.7K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Go | Python |
| Last push | 2026-09-18 | 2026-09-18 |
| Forks | ⑂ 1.8K | ⑂ 475 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick gofr if
- You weight community size — 21K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Go
- 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 gofr
GoFr is an opinionated Go framework for building microservices, aimed at Go developers and platform teams who want HTTP, gRPC, data access and observability built in rather than assembled from separate libraries.
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 gofr or viztracer more popular?
gofr has 20,909 GitHub stars and viztracer has 7,746. gofr has the larger community by that measure.
Are gofr and viztracer free?
Both are open source. gofr is licensed under Apache-2.0 and viztracer under Apache-2.0. Neither carries a licence fee.
What is the difference between gofr and viztracer?
gofr is written in Go 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, gofr or viztracer?
Choose gofr if you want the larger community (20,909 stars) or its Apache-2.0 licence terms. Choose viztracer if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.