Tandem Browser

Windows · Mac · Linux · API

Freedom report

Three barsScore 6.5

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely3 of 6 device platforms
DocumentedPlans, terms and facts published

Tandem Browser is ranked #10 of 23 in AI browsers on Freedom251. It runs on API, Linux, macOS, Windows. There is a free plan.

Tandem Browser plans and pricing

All plans

Free Free Free and open source · no subscription tandembrowser.org · 30 Sept 2026

Compared on AI browsers

Free plan: Yes
Page summaries: Yes
AI research mode: Yes
Browser agent: Yes
Supported platforms: macOS Apple Silicon, Windows 11 x64, Linux (best-effort)
Browser engine: chromium
Privacy model: local

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The record

Product: Tandem Browser is an open-source, local-first browser where AI agents share the user's browser session, tabs, cookies, and DOM.
License and stage: The site identifies Tandem Browser as MIT licensed and in developer preview.
Page access: Agents can work with the accessibility tree, rendered DOM, network requests, console output, and DevTools.
Human handoff: When an agent encounters a CAPTCHA, unclear form, or judgment call, it pauses and asks the user for help.
Model integrations: The maker says agents that speak MCP or HTTP can connect, including Claude, GPT, Gemini, OpenClaw, Ollama, LM Studio, and custom scripts.
Agent connections: Agents can connect on the same machine or remotely over a private Tailscale network; each agent can have its own workspace, with tab locks to prevent conflicts.
API: The API page documents more than 280 HTTP endpoints and 257 MCP tools, with bearer-token authentication.
Security: The maker describes an eight-layer security pipeline with an 811K-plus-entry blocklist, YARA-style rules, AST fingerprinting, entropy detection, and 51 automated tests.
Data handling: The FAQ says there is no Tandem Browser cloud backend, subscription, or telemetry, and that browsing data stays on the user's machine unless they choose to send it elsewhere.
Offline use: The FAQ says Tandem Browser can run fully offline when used with a local model such as Ollama or LM Studio.
Platforms: The FAQ lists macOS Apple Silicon and Windows 11 x64 as supported, with Linux described as best-effort; it says macOS builds are signed and notarized while Windows builds are unsigned.
Browser features: The maker lists workspaces, extensions, bookmarks, history, a local password vault, and sidebar apps among its daily-driver browser features.
Sidebar integrations: The repository lists Telegram, WhatsApp, Discord, Slack, Gmail, Calendar, Instagram, and X as sidebar apps.
Support: The maker directs users to GitHub Discussions for questions and troubleshooting, and GitHub issues for bugs and concrete feature requests.
Price from: Free

Where it ranks on Freedom251

Best AI Browsers in 2026#10 of 23

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Sources

tandembrowser.org· checked 30 Sept 2026
tandembrowser.org/api· checked 30 Sept 2026
github.com/hydro13/tandem-browser· checked 30 Sept 2026