Flowise vs Sim
A side-by-side comparison of capabilities, autonomy, integrations, and pricing to help you choose.
Short answer: choose Flowise if you want open-source drag-and-drop builder for ai agents and llm workflows (Supervised agent, freemium); choose Sim if you want open-source visual platform to build, deploy, and manage ai agent workflows (Supervised agent, freemium).
| Flowise | Sim | |
|---|---|---|
| What it is | Open-source drag-and-drop builder for AI agents and LLM workflows | Open-source visual platform to build, deploy, and manage AI agent workflows |
| Type | platform | platform |
| Autonomy | Supervised agent | Supervised agent |
| Pricing | freemium · Self-host free (open source); Flowise Cloud paid plans | freemium · Free (Community); Pro $25/mo |
| Best for | developers, smb | developers, smb, mid-market, enterprise |
| Deployment | self-hosted, saas | saas, self-hosted, api |
| Modalities | text, api | text, api, code |
| Models | model-agnostic, open-source | model-agnostic, open-source |
| Protocols | function-calling, rest-api, mcp | mcp, rest-api, function-calling |
| Integrations | LangChain, OpenAI, Anthropic, AWS, Azure, GCP | Slack, Gmail, GitHub, Notion, Airtable, HubSpot |
| Capabilities | 3 documented | 4 documented |
Flowise
- +Open source and free to self-host with no orchestration code required
- +Accessible to both technical and non-technical builders
- +Supports single-agent, multi-agent, and full workflow orchestration
- -A building platform: you design the flow and its guardrails
- -Heritage on LangChain means some complexity leaks through for advanced flows
Sim
- +Genuinely open-source (Apache 2.0) with first-class self-hosting via Docker, npm, and local models (Ollama, vLLM)
- +Broad model and integration coverage plus multiple deployment modes (API, chat, schedule, webhook, MCP server)
- +Strong momentum: YC-backed with a Series A and tens of thousands of GitHub stars
- -Young company (founded 2025) with a small team and limited enterprise support track record
- -Paid cloud tiers are credit-metered, making costs harder to predict for heavy workloads
Which should you choose?
Flowise is open-source drag-and-drop builder for ai agents and llm workflows, best for developers, smb. Sim is open-source visual platform to build, deploy, and manage ai agent workflows, best for developers, smb, mid-market, enterprise. The right choice depends on the autonomy level you want, your existing integrations, and your budget, all compared above.
This comparison is generated from the sourced Flowise and Sim profiles. Open either profile to review its evidence and last-reviewed date.