deer-flow vs Weaver
deer-flow ranks higher on current evidence: 1532 commits by 292 contributors in the last 90 days (871 in the last 30).
| deer-flow | Weaver | |
|---|---|---|
| Grade | B | F |
| Verdict | Active1 major behind | Dormant2+ majors behind |
| Category rank | #12 | #84 |
| Model | Free | Free |
| Commits, 90 days | 1532 | 0 |
| Contributors, 90 days | 292 | 0 |
| Last activity | Oct 19, 2026 | Apr 9, 2026 |
| Listed price | Free | Free |
| Evidence source | Code | Code |
| Latest release | v2.1.0 | v0.6.7 |
| License | MIT | MIT |
| TypeScript | 5.8.2 (latest 7.0.2) | 5.9.3 (latest 7.0.2) |
| FastAPI | 0.115.0 (latest 0.146.0) | 0.134.0 (latest 0.146.0) |
| Vercel AI SDK | 6.0.33 (latest 7.0.143) | 3.4.0 (latest 7.0.143) |
| Zod | 3.24.2 (latest 4.6.7) | — |
| Next.js | 16.3.8 ✓ | 14.2.0 (latest 16.4.2) |
| React | 19.0.0 ✓ | 18.3.0 (latest 19.3.1) |
| Tailwind CSS | 4.0.15 ✓ | 3.4.1 (latest 4.3.3) |
| OpenAI SDK | — | 1.0.0 (latest 3.35.1) |
| LangChain | — | 1.0.0 ✓ |
| LangGraph | — | 1.0.0 ✓ |
| Pydantic | — | 2.12.5 ✓ |
| SQLAlchemy | — | 2.0.25 ✓ |
| Framework | Next.js, FastAPI | Next.js, FastAPI |
| UI | Tailwind CSS, Radix UI | Tailwind CSS, Radix UI |
| AI | Vercel AI SDK | Vercel AI SDK, OpenAI SDK, LangChain, LangGraph, MCP SDK |
| API layer | TanStack Query, Uvicorn | Pydantic, Uvicorn |
| Testing | Playwright | — |
| Database / ORM | — | SQLAlchemy, PostgreSQL (psycopg) |
Evidence checked . ✓ = on the latest major version. "Claimed" = a version the vendor's public pages mention, not verified code. Evidence as of Oct 19, 2026. Rankings never depend on affiliate or paid status. Method.