compare
Langflow vs Sim
The same facts for both, read from GitHub every night, and the relation a person reviewed.
| Fact | Langflow | Sim |
|---|---|---|
| Language | Python | TypeScript |
| Licence | MIT | Apache-2.0 |
| Stars | 156k | 30k |
| Latest | v1.12.4 | v0.9.14 |
| Last push | 2026-10-06 | 2026-10-06 |
| Release cadence | about 7 days between releases | about 1 day between releases |
| Active contributors | 33+ commit authors on the default branch in the last 90 days | 7+ commit authors on the default branch in the last 90 days |
| Flags | none | none |
How they relate
Both replace Microsoft Copilot Studio. Alternatives to Microsoft Copilot Studio →
PartialLangflowA visual editor for agent and RAG flows, served behind an API or as an MCP server.
PartialSimA visual builder for agent workflows with many integrations, on your own server.
Langflow
Sim
- v0.9.142026-10-05fix(mothership): preserve workflow identity in background confirmations (#8615)
- v0.9.132026-10-04feat(library): Slack AI Agent Security: Permissions, Data, and Audit Guide (#8600)
- v0.9.122026-10-03feat(forks): compare last synced source deployments (#8586)
- typescript-sdk-v0.2.12026-10-03TypeScript SDK v0.2.1
- python-sdk-v0.2.12026-10-03Python SDK v0.2.1
Langflow
✓ signed The latest release, v1.12.4, carries a signature GitHub verified.
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Sim
✓ signed The latest release, v0.9.14, carries a signature GitHub verified.
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