Agentic Index
Langflow vs Sim (2026)
Both are open source visual builders for agent workflows, at 10 and 12.5 of 14.
Langflow is a visual builder for language model flows with a large community and Python extensibility. Sim is an open source workspace where teams build, deploy and manage agent workflows visually, conversationally through Mothership, or in code, at 25 dollars a month for Pro. Sim documents considerably more and its three ways into the same workflow suit a mixed team; Langflow has the larger community behind it.
Choose Langflow if
- Community size and reference density matter for a foundational choice.
- Python extensibility is how your team will customize this.
- You want a builder, not a workspace to adopt.
Choose Sim if
- Documented coverage is materially deeper across the matrix.
- Visual, conversational and code paths to the same workflow suits your mixed team.
- Twenty five dollars a month with managed hosting removes the operational burden.
Vendor data for this comparison is unavailable.
Browse the full vendor directory