Developer frameworks for building AI agents and multi-agent systems — 12 tools reviewed and compared.
| Tool | Rating | Pricing | Starting Price | Free Tier |
|---|---|---|---|---|
| CrewAI | ★ 4.6 | open-source | $0 | Yes |
| Autogen | ★ 4.5 | open-source | $0 | Yes |
| Devin | ★ 4.5 | subscription | — | No |
| LangChain | ★ 4.5 | open-source | $39/month | Yes |
| Synthflow | ★ 4.5 | usage-based | $0.09/min | Yes |
| Browserbase | ★ 4.2 | freemium | $20/month | Yes |
| Composio | ★ 4.2 | freemium | $29/month | Yes |
| MetaGPT | ★ 4.2 | freemium | $20/month | Yes |
| MultiOn | ★ 4.2 | freemium | $10/month | Yes |
| AutoGPT | ★ 4.0 | open-source | $0 | Yes |
| Relevance AI | ★ 4.0 | freemium | $0/month | Yes |
| Vapi | ★ 3.5 | freemium | $0.05/min | Yes |