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Anchor Browser

Cloud-hosted browser infrastructure for computer-use and browser agents

Anchor describes itself as a cloud-hosted browser that lets AI agents use the web the way a person would. Features include Anchor Chromium (a stealth Chromium fork), OmniConnect for login handling, a built-in VPN and a Web Action Cache that turns planned tasks into deterministic code. It can be deployed in the customer's own cloud and is reachable through an SDK or MCP.

E2B

Open-source sandboxes for running AI-generated code.

E2B gives agents secure, isolated cloud micro-VMs to execute code and commands — the execution runtime layer of the harness, used by many coding and data-analysis agents.

4 pros · 3 cons

Elastic sandboxes for running AI-generated code.

Daytona provides secure, OCI-compatible sandbox 'computers' that spin up in under 90ms — with snapshots for persistent agent state. In 2026 it moved core development to a private codebase while continuing to run as a commercial platform.

3 pros · 4 cons

The integration layer: hundreds of managed tools your agents can call.

Composio handles auth, schemas, observability and reliability for the external SaaS tools an agent uses — 'plumbing for agentic actions' across Slack, GitHub, Salesforce and 250+ other surfaces.

4 pros · 4 cons

Connections

Relations from the Harness Hub knowledge graph, as charted in the State of Harness reports.

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