Project Mariner alternatives

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. Full Project Mariner record →

What the maintainers say

Google Labs says Project Mariner was shut down on 2026-05-04 and points users to Gemini Spark for complex tasks.

  1. Move browser-task workflows to Gemini, using Gemini Spark for complex multi-step tasks as the Mariner page recommends

Sources: labs.google.com · checked 2026-10-27

Other live alternatives

  1. 1 Browser Use Computer-use & desktop agents

    also in Computer-use & desktop agents · same storage (kv) · same retrieval (injection) · same conflict handling (stateless) · same memory unit (turn) · also offered managed

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 119k MIT Compare with Project Mariner →

  2. 2 UI-TARS Computer-use & desktop agents

    also in Computer-use & desktop agents · same storage (kv) · same retrieval (injection) · same conflict handling (stateless) · same memory unit (turn) · also offered managed

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 40k released 2026-10-09 Apache-2.0 Compare with Project Mariner →

  3. 3 Steel.dev Computer-use & desktop agents

    also in Computer-use & desktop agents · same storage (kv) · same retrieval (injection) · same conflict handling (stateless) · same memory unit (turn) · also offered managed

    OSS ✓ Self-host ✓ Managed ✓ MCP ? ★ 7.6k released 2026-08-25 Apache-2.0 Compare with Project Mariner →

  4. 4 Anthropic Computer Use Computer-use & desktop agents

    also in Computer-use & desktop agents · same storage (kv) · same retrieval (injection) · same conflict handling (stateless) · same memory unit (turn) · also offered managed

    OSS — Self-host — Managed ✓ MCP — proprietary (Claude API feature) Compare with Project Mariner →

  5. 5 Claude for Chrome Computer-use & desktop agents

    also in Computer-use & desktop agents · same storage (kv) · same retrieval (injection) · same conflict handling (stateless) · same memory unit (turn) · also offered managed

    OSS ? Self-host — Managed ✓ MCP ? Compare with Project Mariner →

  6. 6 Highlight AI Computer-use & desktop agents

    also in Computer-use & desktop agents · same storage (kv) · same retrieval (injection) · same conflict handling (stateless) · same memory unit (turn) · also offered managed

    OSS ? Self-host ✓ Managed ✓ MCP ? released 2026-10-20 Compare with Project Mariner →

  7. 7 Hyperbrowser Computer-use & desktop agents

    also in Computer-use & desktop agents · same storage (kv) · same retrieval (injection) · same conflict handling (stateless) · same memory unit (turn) · also offered managed

    OSS ? Self-host ✓ Managed ✓ MCP ✓ Compare with Project Mariner →

  8. 8 Pipecat (Daily) Voice agent platforms

    same storage (kv) · same retrieval (injection) · same conflict handling (stateless) · same memory unit (turn) · also offered managed

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 17k released 2026-08-01 BSD-2-Clause Compare with Project Mariner →

Ranked by shared memory design (storage, retrieval, conflict handling, memory unit), same section and shared must-haves (open source, self-hosting, MCP), with adoption as a tie-breaker. ✓ confirmed · — no · ? not in the catalog yet. Want picks for your own requirements? Use the chooser. Checking a whole project? Check your stack.