Startup
Chunk by CircleCI
Local validation for your agent's code
Chunk is a CircleCI tool that validates code written by Claude Code, Cursor or other agents before it is pushed to CI. It syncs local code to a remote Linux microVM sidecar and runs tests there as 'microbuilds' inside the agent loop, using hooks to give deterministic feedback. Sidecars can run integration suites with services like Postgres and Redis. It is free on every CircleCI plan.
Neighbours in the directory
San Francisco, CA · Est. 2022
The de-facto standard toolkit for building LLM applications and agents.
LangChain makes the LangChain framework and LangGraph, the low-level orchestration standard for stateful, controllable agents, plus the LangSmith platform for tracing, evaluating and monitoring them in production.
~$75M raised
San Francisco, CA · Est. 2023
Devin, the AI software engineer, and the Windsurf IDE.
Cognition builds Devin, an autonomous AI software engineer that plans and executes engineering tasks end-to-end, and acquired the Windsurf agentic IDE in 2025. One of the defining startups of the coding-agent wave.
~$10.2B valuation (Sep 2025)
Prague, Czechia · Est. 2023
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.
Connections
Relations from the Harness Hub knowledge graph, as charted in the State of Harness reports.
Built on · 1
- Claude CodeProject
Sources
Verified Oct 29, 2026