Vercel AI SDK vs LangChain
A side-by-side look at scores, pricing and features — with RECATOOLS' ASEAN-aware verdict for each.
Vercel AI SDK
Provider-agnostic TypeScript SDK for streaming AI apps
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LangChain
Most popular framework for building LLM applications
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| RECATOOLS Score | 8.4 / 10 | 8.1 / 10 |
| Capability | ||
| Value for money | ||
| Ease of use | ||
| ASEAN readiness | ||
| API quality | ||
| Pricing | Open Source | Open Source |
| Free tier | — | Open source framework is free; LangSmith has a free developer tier |
| Paid from | — | $39/month (LangSmith Plus) |
| Has API | ✓ | ✓ |
| Open source | ✓ | ✓ |
| Free to use | ✓ | ✓ |
| Users | — | 1m+ developers |
| Founded | 2023 | 2022 |
| Maker | — | Harrison Chase |
| Verdict | The Vercel AI SDK has become the default way JavaScript developers wire an LLM into an app — a single interface over OpenAI, Anthropic, Google and more than a dozen other providers, with streaming, structured output and... |
Still the default starting point for LLM apps, and meaningfully more stable since LangChain 1.0 and LangGraph 1.0 shipped in October 2025 — agents now run on LangGraph's durable runtime, and the team has promised no brea... |
| Full review → | Full review → |
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Comparisons cover up to 4 tools. Scores are RECATOOLS editorial assessments; verify current pricing on each vendor's site.