fortio/fortio
Fortio load testing library, command line tool, advanced echo server and web UI in go (golang). Allows to specify a set query-per-second load and record latency histograms and other useful stats. observed · 2026-10-14
Health v2 · maintenance only
99/100
- Activity 99
- Release rhythm 99
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-10-21. Adoption (stars, forks) is never an input.
- gap_med: 19.5
- age_days: 3298
- days_rel: 10
- days_push: 10
- n_releases_24m: 23
Adoption not part of the score
3734 stars · 282 forks observed · 2026-10-14
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
Fortio is a Go-based load testing library, CLI tool, and web UI originally built for Istio. It generates load at a specified queries-per-second rate and records latency histograms and percentiles, and also provides echo/debug server features for HTTP, gRPC, and TCP.
Use cases
- load test an HTTP API at a fixed QPS and get p99 latency
- stress test a gRPC service
- measure latency histograms and percentiles for microservices
- run a fault-injection echo server that adds latency or errors
- compare performance of multiple runs graphically via web UI
- load test a service until interrupted at max speed
When to choose
- you need precise QPS-controlled load generation with latency percentile stats
- you want a small, fast, embeddable Go load testing library
- you're testing Istio or other microservice meshes
- you need HTTP, gRPC, and TCP load testing in one tool
When to avoid
- you need distributed load generation across many machines out of the box
- you need browser-level or scripted user-journey testing
- you prefer a GUI-first tool like JMeter or k6's ecosystem
Facets
cli-tool · maturity stable
benchmarking http-client testing load-testing developer-tools performance testing microservices go windows cli load-testing stress-testing latency-histograms grpc echo-server istio web-ui qps linux macos docker web-server
2 sources
- readme: https://github.com/fortio/fortio · fetched 2026-10-14 · 2f131a81a888
- homepage: https://fortio.org · fetched 2026-08-29 · aaafec4d8b1e
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| fortio/fortio | main | 99 |
For agents
Data as of 2026-10-19T08:05:51.212177+00:00 · Report a problem