# Fortio

> Fortio is an open source, self-hosted protocol and API load tool from Fortio project, scripted in Go.

- Canonical: https://perf.jmeter.ai/tools/fortio/
- Official: https://fortio.org/
- Source: https://github.com/fortio/fortio
- Vendor: Fortio project
- Category: Protocol/API Load
- License: Open Source — Free; Apache License 2.0.
- Deployment: Self-hosted
- Status: Active
- Scripting: Go
- Protocols: HTTP, HTTPS, gRPC
- OS support: Windows, macOS, Linux
- First released: 2017
- Latest release: 1.75.2 (2026-06-11)
- Last verified: 2026-08-11

## What it is
Fortio provides a CLI, REST API, and web UI for generating traffic and measuring latency distributions. It supports HTTP, HTTPS, and gRPC workloads.

## Choose it when
- API and protocol throughput or latency campaigns
- Teams that prefer open-source licensing and self-hosting options
- Groups comfortable scripting in Go

## Look elsewhere when
- Teams unwilling to operate generators, results storage, and scaling

## Architecture
Fortio is commonly operated as self-hosted software with scenario authoring in Go. Concurrency and distribution depend on how you size workers or injectors.

## Pricing
Open-source (no cost).

## Compare
- [Fortio alternatives](https://perf.jmeter.ai/alternatives/fortio/)

## FAQ
### Who is Fortio for?
Fortio is best for engineers focused on API and protocol-level throughput and latency. It is open source, so teams can self-host and extend it. Vendor: Fortio project. Deployment model: self-hosted. Free; Apache License 2.0. Confirm details against the official site and a short proof-of-concept in your environment.

### How does Fortio differ from Artillery?
Compared with Artillery, scripting centers on Go rather than JavaScript, TypeScript. Fortio lists protocols HTTP, HTTPS, gRPC; Artillery lists HTTP, HTTPS, WebSocket, Socket.IO, MQTT. Status is active versus active. Use the Test Rig to compare full specs side by side before a proof-of-concept.

### What scripting language and concurrency model does Fortio use?
Fortio uses Go for scripting or scenario definition. Runtime model: code-first scenarios where virtual users execute scripted behavior under load. OS support: Windows, macOS, Linux. Protocols: HTTP, HTTPS, gRPC. Match these to how your team already authors tests and which systems you must drive under load.

### What is the cloud or enterprise path for Fortio?
Fortio is primarily self-hosted; teams typically run generators on their own machines, CI runners, or private cloud. Plan for generator capacity, network access to targets, and result storage yourself. As open source, commercial support or hosted siblings may exist separately. Check the official site. Pricing note: Free; Apache License 2.0.

### What are known limitations of Fortio?
Fortio limitations to weigh: self-hosted tools require you to provision, scale, and observe load generators yourself. Status: active. Always validate against your target protocols and scale with a proof-of-concept. Confirm details against the official site and a short proof-of-concept in your environment.

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Curated by NaveenKumar Namachivayam (QAInsights) · methodology: https://perf.jmeter.ai/about/#methodology · corrections: https://github.com/QAInsights/Performance-Testing-Tools/issues/new?title=Tool%20submission%3A%20&body=Tool%20name%3A%20%0AOfficial%20URL%3A%20%0AWhat%20should%20be%20added%20or%20corrected%3F%20%0A