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AI & Automation

Open-source alternatives to Zapier

Four hand-approved projects in our catalog replace Zapier. They are mainly workflow automation, also agents. n8n has the most GitHub stars (209.2K). Tick what matters to you and the list re-sorts so the closest fits come first. n8n is source-available (SUL-1.0), not open source.

What matters to you?

Each choice is checked against live catalog data. Counts show how many alternatives meet it.

Licence
Activity
Language
Catalog

The alternatives

Pick what matters below. For now the four alternatives are in order of GitHub stars.

Order: GitHub stars

n8n

Workflow automation

Visual workflow automation with code-level control.

  • Connect more than 500 integrations and arbitrary APIs
  • Mix visual nodes with JavaScript or Python logic
  • Trace, test, govern, and self-host AI agents and workflows
Does not meet: Permissive licenceDoes not meet: Open-source licenceMeets: Released ≤ 90 daysMeets: Gaining starsMeets: Written in TypeScriptMeets: In a stack
209.2K starsSUL-1.0source-availableTypeScriptLatest release yesterdayWebsite ↗Full profile →

Flowise

Workflow automation

An archived visual builder for AI agents and workflows.

  • Compose chat, agent, and multi-agent flows visually
  • Add retrieval, tool calling, human review, and execution tracing
  • Expose flows through APIs, SDKs, or embedded chat
Meets: Permissive licenceMeets: Open-source licenceDoes not meet: Released ≤ 90 daysDoes not meet: Gaining starsMeets: Written in TypeScriptDoes not meet: In a stack
55.4K starsApache-2.0TypeScriptLatest release Jul 2026Website ↗Full profile →

Sim

Agents

Build AI agents and workflows on a visual canvas and deploy them.

  • Builds workflows from Agent, Function, Condition, Router, Loop and Parallel blocks.
  • Deploys a workflow as an API, a chat interface or an MCP server.
  • Starts runs from schedules, webhooks, RSS feeds, tables or integration events.
Meets: Permissive licenceMeets: Open-source licenceMeets: Released ≤ 90 daysDoes not meet: Gaining starsMeets: Written in TypeScriptDoes not meet: In a stack
29.9K starsApache-2.0TypeScriptLatest release todayWebsite ↗Full profile →

Activepieces

Workflow automation

Open-source, AI-first automation for technical and non-technical teams.

  • Build flows with loops, branches, retries, HTTP and code steps in a no-code builder.
  • Connect 280+ pieces, each also usable as an MCP server for AI assistants.
  • Add human approval steps, chat and form interfaces, and native AI pieces.
Meets: Permissive licenceMeets: Open-source licenceMeets: Released ≤ 90 daysDoes not meet: Gaining starsMeets: Written in TypeScriptDoes not meet: In a stack
25.3K starsMITTypeScriptLatest release 2 days agoWebsite ↗Full profile →

Data from GitHub and our catalog. Every listing is hand-approved. List prices are what the vendor publishes, not a quote, and self-hosting has its own running costs.