BrowserOS neo vs LangWatch: Which is Better in 2026?

as of Sep 30, 2026

• Developer:$0/mo

as of Sep 12, 2026

• Local-first AI agents
• Chrome-compatible interface
• Uses real logged-in sessions
• MCP integration

• Simulate real users
• Write scenarios in Claude Code
• Local and CI
• Red teaming
• JudgeAgent
• +14 more

BrowserOS neo is an open-source, Chromium-based agentic browser positioned as a privacy-first alternative to cloud-run browser agents like Perplexity's Comet. It has a Chrome-like interface and supports existing Chrome extensions, but adds a local AI agent layer that can browse and take actions on a user's behalf using either the user's own API keys or fully local models via Ollama — keeping browsing data on the user's own machine rather than sending it to a cloud AI provider. Because agents run in the user's actual browser rather than a headless cloud instance, they inherit the user's real logins and sessions instead of needing separate authentication. BrowserOS also exposes an MCP-compatible interface, so external coding agents like Claude Code, Cursor, Codex, VS Code, Zed, or GitHub Copilot can drive the browser directly with a one-click install. The project is licensed under AGPL-3.0 and its source is maintained across several repositories under the browseros-ai GitHub organization.

LangWatch is an open-source, framework-agnostic platform for testing, evaluating, observing, and optimizing AI agents and LLM applications. It uses simulation-based testing with real-user text and voice conversations, LLM-as-a-judge evaluations, red teaming, and OpenTelemetry-native observability to catch issues and prevent regressions. It supports collaboration between technical and non-technical teams and can be deployed as cloud, self-hosted, or hybrid.