Open-source AI workflow automation tools (2026)

Open-source platforms for chaining apps, triggers and AI steps into workflows you can self-host. Here are the top 25 of 89 from the AgentScout directory.

Updated October 19, 2026

How we picked and ranked: tools are matched by category, the pricing each maker states and what each tool says it does. They are ranked by GitHub stars as recorded on each listing (link checks 2026-10-21); tools without a tracked repo follow, by listing maturity. No paid placements.

1. 

   1. OpenClaw

   personal agentsOpen source★ 391,938 GitHub stars

   Open-source personal agent you run yourself and reach over chat apps.

   Pricing (as stated): Open source · Active

2. 

   2. REA

   MCP serversOpen source★ 301,645 GitHub stars

   MCP server and CLI that lets coding agents reverse engineer native binaries, Electron and JavaScript apps, .NET assemblies and live websites, using Ghidra, Hopper or IDA under the hood.

   Pricing (as stated): Open source · Mature

3. 

   3. Langflow

   no-code buildersOpen source + cloud★ 155,757 GitHub stars

   Visual drag-and-drop builder for AI agents and workflows that you can run locally, deploy as an API or expose as an MCP server.

   Pricing (as stated): Open source + cloud · Mature

4. 

   4. Ruflo

   frameworksOpen source★ 74,609 GitHub stars

   Open-source multi-agent meta-harness for Claude Code, Codex, and MCP clients; Oct 13 release adds Mods (mission workflows) and a single control plane with human approval.

   Pricing (as stated): Open source (MIT); model costs still apply · Active

5. 

   5. CowAgent

   personal agentsOpen source★ 47,434 GitHub stars

   Open-source personal assistant and agent harness that plans tasks, runs tools and skills and connects to chat apps.

   Pricing (as stated): Open source · Mature

6. 

   6. LangGraph

   frameworksOpen source★ 43,237 GitHub stars

   Framework for stateful, graph-based agent workflows.

   Pricing (as stated): Open source · Mature

7. 

   7. AstrBot

   frameworksOpen source★ 42,095 GitHub stars

   Open-source agent chatbot platform and framework that connects LLMs, plugins and tools to mainstream messaging apps for assistants, support bots and knowledge bases.

   Pricing (as stated): Open source · Mature

8. 

   8. CopilotKit

   frameworksOpen source + cloud★ 38,064 GitHub stars

   Frontend stack for putting agents and generative UI into React and other apps, from the makers of the AG-UI protocol.

   Pricing (as stated): Open source + cloud · Mature

9. 

   9. Lightpanda

   browser/computer useOpen source + cloud★ 36,657 GitHub stars

   Headless browser written from scratch in Zig for AI agents and automation, built for speed and low memory rather than forked from Chromium.

   Pricing (as stated): Open source + cloud · Mature

10. 

    10. Orkes

    frameworksOpen source + cloud★ 32,319 GitHub stars

    Orchestration platform built on Conductor for durable workflows and AI agents.

    Pricing (as stated): Open source + cloud · Mature

11. 

    11. OpenAI Agents SDK (Python)

    frameworksOpen source★ 30,023 GitHub stars

    OpenAI's Python SDK for building multi-agent workflows; v0.23.0/0.23.1 released Oct 1-2.

    Pricing (as stated): Open source · Mature, official SDK

12. 

    12. Sim Studio

    no-code buildersOpen source + cloud★ 29,835 GitHub stars

    Workspace for visually building, deploying and monitoring AI agents and workflows.

    Pricing (as stated): Open source + cloud · Mature

13. 

    13. MLflow

    evals & observabilityOpen source + cloud★ 28,418 GitHub stars

    Open-source platform for tracing, evaluating and managing agents, LLM apps and ML models.

    Pricing (as stated): Open source + cloud · Mature

14. 

    14. Haystack

    frameworksOpen source + cloud★ 26,748 GitHub stars

    Open-source orchestration framework for building production LLM apps, RAG and agents.

    Pricing (as stated): Open source + cloud · Mature

15. 

    15. Activepieces

    no-code buildersOpen source + cloud★ 25,073 GitHub stars

    Open-source automation platform with AI agents and hundreds of pieces usable as MCP servers.

    Pricing (as stated): Open source + cloud · Mature

16. 

    16. n8n-MCP

    MCP serversOpen source★ 23,089 GitHub stars

    MCP server that lets Claude, Cursor and other agents build n8n workflows for you.

    Pricing (as stated): Open source · Mature

17. 

    17. Go Micro

    frameworksOpen source★ 23,086 GitHub stars

    Go framework for distributed systems where services double as tools for AI agents, with RPC, discovery, messaging and agent workflows.

    Pricing (as stated): Open source · Mature

18. 

    18. MaxKB

    no-code buildersOpen source★ 22,986 GitHub stars

    Open-source platform for building enterprise agents and knowledge-base assistants.

    Pricing (as stated): Open source · Mature

19. 

    19. Opik

    evals & observabilityOpen source + cloud★ 22,700 GitHub stars

    Comet's open-source platform for tracing, evaluating and monitoring LLM apps, RAG systems and agent workflows, self-hosted or in the cloud.

    Pricing (as stated): Open source + cloud · Mature

20. 

    20. RocketRide

    frameworksOpen source★ 17,753 GitHub stars

    AI pipeline engine with a C++ core and 50+ Python nodes for building, debugging and deploying LLM workflows and agents from VS Code or the CLI.

    Pricing (as stated): Open source · Mature

21. 

    21. Browser Use Web UI

    browser/computer useOpen source★ 16,618 GitHub stars

    Gradio web interface for the Browser Use agent that runs AI browser automation tasks with many LLM providers and your own browser.

    Pricing (as stated): Open source · Mature

22. 

    22. Trigger.dev

    frameworksOpen source + cloud★ 16,558 GitHub stars

    Platform for building and deploying durable background AI agents and workflows in TypeScript.

    Pricing (as stated): Open source + cloud · Mature

23. 

    23. Eigent

    personal agentsOpen source★ 15,571 GitHub stars

    Open-source cowork desktop app that runs multi-agent workflows locally.

    Pricing (as stated): Open source · Mature

24. 

    24. Botpress

    no-code buildersOpen source + cloud★ 14,956 GitHub stars

    Platform for building and deploying LLM-powered chatbots and agents, with a visual studio, integrations hub, CLI and SDK.

    Pricing (as stated): Free plan; Plus $150/mo and Team $750/mo billed annually; Enterprise custom · Mature

25. 

    25. Corsair

    agent infraOpen source★ 14,922 GitHub stars

    Integration layer for connecting your users' apps to agents.

    Pricing (as stated): Open source · Mature

FAQ

What are the best open-source workflow automation?

Ranked by tracked GitHub stars, the top open-source workflow automation in our directory are OpenClaw, REA, Langflow, Ruflo, CowAgent. Stars measure popularity, not fit, so compare a few against your own task.

How many open-source workflow automation does AgentScout list?

89 tools match. This page shows the top 25. Pricing mix on this page: Open source (14), Open source + cloud (11).

How much do these tools cost?

Pricing is what each maker states on their site. Open-source tools are free to self-host but may need a paid model API key or offer paid cloud plans; freemium tools have a free plan with limits. Check each official site.

Where can I see every tool for automating workflows?

Our task page lists all 189 tools we match to automating workflows.

Related: All tools for automating workflows · Best No-Code AI Agent Builders · frameworks (24) · browser/computer use (17) · no-code builders (13) · MCP servers (10)

Similar searches: Free no-code AI agent builders · Free AI workflow automation tools

By role: For data engineers · For operations teams · For automation engineers

All popular searches · AI agents by role · Free tools

Related categories: Frameworks · No-code builders · Personal agents

Facts come from our directory listings; pricing is as each maker states it and can change. Check official sites before you choose.