The Best Open-Source Browser Agents in 2026

Updated 2026-06-23

TL;DRIf you want one open-source browser agent in 2026, start with browser-use (~89% WebVoyager, huge community). Pick Skyvern for structured, repeatable workflows, and watch Magnitude, which reports state-of-the-art ~94% WebVoyager. The open-source field has caught up to — and in places passed — the commercial agents.

The short answer

The open-source gap has closed. In 2024 commercial agents led; in 2026 open-source browser-use beats OpenAI's Operator on WebVoyager (~89% vs ~87%), and Magnitude reports state-of-the-art around 94%. For most people, browser-use is the right default; the rest depend on your use case.

Comparison table

Agent	WebVoyager (approx.)	Best for	Language
browser-use	~89%	General use, biggest community	Python
Magnitude	~94% (reported)	Maximum success rate	Python/TS
Skyvern	~85%	Structured workflows, JSON output	Python
Stagehand	—	Developers who want fine control	TypeScript
LaVague	—	Learning / experimentation	Python

Scores move fast and depend on the underlying model — treat them as a snapshot, not gospel.

browser-use — the default

The most popular open-source browser agent, with a very large community and strong WebVoyager performance. It's model-agnostic, well-documented, and the fastest way to get an agent doing real work. If you're not sure, start here.

Skyvern — for repeatable workflows

Skyvern leans into structured, production-style workflows and returns structured JSON, which makes it a good fit when you need the same multi-step task run reliably and parsed downstream — think form-filling pipelines and data collection at scale.

Magnitude — for raw success rate

Magnitude reports state-of-the-art WebVoyager results (~94%). If the single thing you care about is how often the agent completes the task, it's worth benchmarking on your own workload.

Stagehand & LaVague — control and learning

Stagehand (TypeScript) gives developers granular control and composes well with existing Playwright code. LaVague is a friendly entry point for understanding how web agents work.

How to choose

Just want it to work? browser-use.
Production pipeline with structured output? Skyvern.
Chasing the highest success rate? Benchmark Magnitude on your tasks.
TypeScript shop / want control? Stagehand.

A note on benchmarks

WebVoyager is the most-cited benchmark (643 tasks, 15 real sites), but it's nearly saturated at the top in 2026. If you're evaluating seriously, also look at BrowseComp and WebChoreArena, and — most importantly — measure on a sample of your own tasks. A leaderboard win doesn't guarantee success on your weird internal admin panel.

New to the space? Start with what an autonomous web agent is.