Project Mariner
https://labs.google.com/mariner/
Google DeepMind's experimental browser agent built on Gemini 2.0, a Chrome extension that took actions on the user's behalf. Research preview launched Dec 2024 as Google's answer to OpenAI Operator / Anthropic Computer Use. Shut down on 2026-05-04; Google directs users to Gemini for complex agentic tasks.
Archived · Verified 2026-10-31 · fresh as of 2026-10-31 · 58 cited facts, 0 with a third-party source · 2 recorded changes · Suggest a correction
At a glance
- Type
- Google DeepMind browser-agent (research preview) vendor fix
- Tier
- T1
- Section
- Computer-use & desktop agents
- Latest release
- not applicable — not OSS fix
- License
- not applicable — not OSS fix
- GitHub
- not applicable — no GitHub repo fix
- Pricing
- Bundled with Gemini Advanced ($19.99/mo) vendor fix
- Funding
- Google DeepMind parent (Alphabet) vendor fix
- Freshness
- 2026-10-31 fix
- Layer
- agent-infra repo fix
- Licensing
- commercial vendor fix
When to use
Optimised for: Gemini 2.0-powered Chrome agent
Anti-fit: Research preview only; Chrome only; Gemini Advanced tier
Pros & cons
Pros
Strong WebVoyager numbers; Google distribution; A2A first-party adjacency.
Cons
Research preview; Chrome / Gemini Advanced tier; closed source.
Claims & capabilities
Powered by Gemini 2.0; WebVoyager 83.5% per launch eval; research preview Dec-2024
Technical surface
- API surface
- Chrome extension; underlying Gemini 2.0 API
- Backend storage
- Google-managed session state
- Deployment
- Chrome extension + Google Cloud
- Embedding model
- not applicable — not a memory product
- Multi-tenancy
- Single-tenant per Google account
- MCP
- searched not found
- A2A
- Google's own A2A protocol — likely first-party compatible
- OpenTelemetry
- searched not found
Alternatives to Project Mariner → live options ranked by shared design, licence, hosting and MCP support
Similar systems
Other computer-use & desktop agents in the catalog, ranked by inbound references.
- Browser Use T1
Python library that turns any LLM into a browser agent — extracts DOM into a structured representation the LLM can act on (rather than pure screenshot). Browser Use Inc. raised $17M seed Q1 2025 (Felicis); cloud product at cloud.browser-use.com. Project is one of the most-starred browser-agent OSS repos.
- Stagehand T1
Open-source browser-automation framework by Browserbase (TypeScript core plus Python and Go SDKs). Mixes Playwright-style code with natural-language act/extract/observe; pairs with Browserbase Cloud.
- Hyperbrowser T2
Cloud-hosted headless browser API tuned for AI agents — captcha solving, stealth mode, session recordings. Y Combinator S24; pitched as a faster / cheaper Browserbase alternative. Used as substrate by agents that need browser execution but don't want to run their own Chromium fleet.
- UI-TARS T2
ByteDance Seed's open-source GUI-agent foundation model — released Jan 2025; trained end-to-end on screenshot → action pairs. Comes with UI-TARS-Desktop (Electron app) that runs the model against the user's screen. SOTA on OSWorld at release; weights on HuggingFace.
- Anthropic Computer Use T1
Anthropic's API-surface capability that lets Claude control a virtual desktop — see screenshots, type, click. Launched 2024-10 as a public beta. Not a finished IDE itself; it's the substrate that other harnesses (and Anthropic's own Claude apps) use to operate a computer.
- Skyvern T2
Open-source autonomous browser agent that uses computer vision + LLMs to navigate websites. Workflow-based: agents follow recorded plans that adapt to layout changes. Skyvern Inc. raised $4.5M seed (Sep-2024, Felicis lead). Self-hostable; cloud version on skyvern.com.
Sources (57 cited facts, 0 third-party)
Each fact links to the page it came from; the badge says who published it (how to read sources).
- What it is Google DeepMind browser-agent (research preview) vendor
- What it does & what's distinct Google DeepMind's experimental browser agent built on Gemini 2.0, a Chrome extension tha… vendor
- Claims / benefits Powered by Gemini 2.0; WebVoyager 83.5% per launch eval; research preview Dec-2024 vendor
- Modalities text + DOM + screen images vendor
- Created 2024-12 vendor
- Mindshare Major launch coverage Dec-2024; integrated into Gemini app 2025 vendor
- Funding Google DeepMind parent (Alphabet) vendor
- Customers / scale Trusted-tester preview → Gemini Advanced subscribers vendor
- Pricing Bundled with Gemini Advanced ($19.99/mo) vendor
- Compliance Google Cloud SOC 2 / ISO 27001 (parent) vendor
- Data handling Watch-mode for sensitive sites; standard Google data policy vendor
- Deployment Chrome extension + Google Cloud vendor
- HQ UK / US (Google DeepMind) vendor
- Founders / pedigree Google DeepMind; CEO Demis Hassabis vendor
- Performance WebVoyager 83.5%; published at launch vendor
- API surface Chrome extension; underlying Gemini 2.0 API vendor
- Backend storage Google-managed session state vendor
- Multi-tenancy Single-tenant per Google account vendor
- Encryption Google Cloud encryption stack vendor
- SSO / RBAC via Google Workspace / Identity vendor
- Tombstoning User-initiated history delete vendor
- Namespace primitives per-Google-account vendor
- Forgetting policy Sessions clear by default vendor
- A2A support Google's own A2A protocol — likely first-party compatible vendor
- Validated verticals consumer browser tasks (research, shopping, scheduling) vendor
- Time to running <5min (Chrome extension + Gemini Advanced) vendor
- Anti-fit Research preview only; Chrome only; Gemini Advanced tier vendor
- Optimised for Gemini 2.0-powered Chrome agent vendor
- Adjacent infrastructure Gemini 2.0; Google Cloud; Chrome; Google A2A protocol vendor
- Pros Strong WebVoyager numbers; Google distribution; A2A first-party adjacency. vendor
- Cons Research preview; Chrome / Gemini Advanced tier; closed source. vendor
- Project & sources deepmind.google/technologies/project-mariner vendor
- obs-langsmith no vendor
- obs-opentelemetry no vendor
- obs-datadog no vendor
- obs-helicone no vendor
- obs-weave no vendor
- obs-langfuse no vendor
- obs-arize no vendor
- obs-custom Closed research preview; no developer observability surface vendor
- cost-token-budget no vendor
- cost-prompt-caching no vendor
- cost-semantic-caching no vendor
- cost-batching no vendor
- cost-model-routing no vendor
- cost-streaming-only no vendor
- cost-observability-cost-attribution no vendor
- eval-langsmith-evals no vendor
- eval-braintrust no vendor
- eval-weights-and-biases-agent no vendor
- eval-helicone-evals no vendor
- eval-custom-test-harness no vendor
- eval-human-loop no vendor
- eval-production-traffic-replay no vendor
- capability-benchmark-sources webvoyager: 83.5% (Project Mariner, Gemini 2.0, single-agent setup, Google blog 2024-12-… vendor
- licensing-bucket commercial vendor
- taxonomy-three-layer-rollup agent-infra repo
What changed
Changes to this record's lifecycle, licence, release, pricing and hosting facts, from the catalog's git history. Subscribe (Atom)
Related systems
References (1)
- Google Gemini 3 family depends on at runtime — Google DeepMind's experimental browser agent built on Gemini 2.0, a Chrome extension that took actions on the user's behalf.