Agenta · The agent harness as a product — an open-source workspace that versions an agent's instructions, skills and tools like code and evaluates a change before it ships, which is the layer the whole "build your own system" argument runs through.

An open-source workspace where you build an agent by describing the job in chat — instructions, skills, tools, files — then keep improving it with feedback from real runs, version every change like code, evaluate a change against a test set before it ships, and trace each run's steps and cost. You run it on their cloud or self-host it. Since 21 July 2026 that is the whole pitch; before that they sold prompt management, evaluation and observability for LLM apps (source: https://agenta.ai/docs/changelog entry *"Agenta Is Now a Workspace for Building Agents"*, 21 July 2026, v0.105.7, read 2026-09-15).

Sector

Agent frameworks

On the roster since

15 Sept 2026