We track and rank the best AI workflow agents built for Open Source businesses. Every agent below is evaluated on pricing, deployment complexity, integrations, and capability depth — so you can choose the right tool to automate business processes and orchestrate tasks in Open Source.
6 agents indexed· Updated September 2026
Mastra (ex-Gatsby team)
Open-source TypeScript AI agent framework by the Gatsby team. v1.0 January 2026. YC W25, $13M seed. Used by Replit, Salesforce, SoftBank and Factorial. Framework free, Mastra Cloud from $250/mo (USD).
Sampark Inc
AI tool-calling platform connecting 1,000+ integrations to AI agents via MCP Gateway and function calling, with usage-based pricing starting free at 20,000 tool calls per month.
Nous Research
Open-source autonomous AI agent by Nous Research with a self-improving learning loop. Runs on your server or desktop app, remembers what it learns. 209.8k GitHub stars.
Browser Use
Open-source Python library for AI browser automation with LLMs and computer vision. Free tier (10 tasks/mo); cloud Dev from $24/mo billed annually. MCP server and client. 100,000+ GitHub stars.
Topoteretes
Open-source AI memory platform for agents, using a hybrid graph and vector architecture and an ECL pipeline. $7.5M seed, Berlin. Python, TypeScript and Rust SDKs. Free tier, then usage-based from $2.50 per 1M tokens.
n8n GmbH
Open-source workflow automation platform with 400+ integrations, 70+ AI agent nodes, and MCP support. Visual editor plus inline code. Self-hosted free; cloud from EUR 20/mo.
Based on our index, the top AI workflow agents for Open Source are Mastra, Composio, Hermes Agent. These are ranked by rating and capability depth across 6 indexed agents.
When evaluating AI workflow agents for Open Source, consider pricing model (free vs subscription vs usage-based), deployment difficulty, integrations with your existing stack, and whether the agent specialises in Open Source workflows. Every agent on this page includes structured data on all of these dimensions.
Yes — several AI workflow agents offer free or freemium plans. Use the filter pills above to narrow by pricing, or browse the full AI Workflow Agents index.