The best open source alternative to Microsoft Copilot Studio is Agenta. If that doesn't suit you, we've compiled a ranked list of other open source Microsoft Copilot Studio alternatives to help you find a suitable replacement.
Microsoft Copilot Studio alternatives are mainly LLM Observability & Evaluation. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Microsoft Copilot Studio.
Open-source workspace for building and running AI agents: chat-driven development, scheduling, human-in-the-loop approvals, versioning, and tracing. Self-host or use the cloud.

Agenta is a workspace for teams building and operating AI agents. It's built around a simple idea: you should be able to work with an agent in chat, then turn that same conversation into an automated workflow without rewriting anything.
You start by describing what you want done. The agent works with your files, apps, and integrations to get it done. When you're satisfied, you tell it when to run on its own. That's the whole loop.
Key capabilities:
Agenta ships with templates for common jobs: code review, customer support, sales outreach, knowledge retrieval, and operations. The code review agent template, for instance, reads pull request diffs, flags bugs and security issues inline, and tags code owners when sensitive areas like auth or billing are touched.
For teams concerned about data residency, Agenta is MIT-licensed and fully self-hostable. The self-hosted version runs the same code as Agenta Cloud, with no feature gaps or lock-in. When running locally, you can use your existing Claude or ChatGPT subscription rather than paying for a separate API key.
Agenta fits teams that want to move agents from prototype to production without losing visibility into what's actually happening at runtime.