LangChain vs Vercel AI SDK
Which Agents AI tool is better in 2026?
LangChain
Build context-aware AI applications
Vercel AI SDK
A unified TypeScript SDK for building AI apps with modern streaming, fallbacks, and multi-model support.
Side-by-side
| LangChain | Vercel AI SDK | |
|---|---|---|
| Tagline | Build context-aware AI applications | A unified TypeScript SDK for building AI apps with modern streaming, fallbacks, and multi-model support. |
| Founded | 2022 | — |
| HQ | San Francisco, US | — |
| Employees | 50-100 | — |
| Total funding | $35M | Undisclosed |
| Latest round | Seed | — |
| Valuation | $200M | — |
| Cheapest paid plan | Plus · $39/mo | Pricing not disclosed |
| Free plan | ✓ Developer | ✓ |
| Free trial | ✗ | ✗ |
| Top tier price | Plus · $39/mo | Pricing not disclosed |
| Pricing summary | 3 published plans | Open source |
| Categories |
Capability matrix
Developer-facing capabilities and access signals for LangChain and Vercel AI SDK.
| Capability | LangChain | Vercel AI SDK |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✓ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | 4 (Python, TypeScript, Go, Java) | 2 (TypeScript, JavaScript) |
| Free plan | ✓ | ✓ |
| Free trial | ✗ | ✗ |
| Verified | ✓ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of LangChain
- Has raised more capital ($35M vs Undisclosed)
- Higher Neuron score (50 vs 12)
- Lower starting price ($39/mo)
- Newer company (2022)
🔵 Strengths of Vercel AI SDK
- Offers a free plan
Which should you choose?
Choose LangChain if price matters most — it starts at Freemium · From $39/mo, which is friendlier for teams watching burn. Both AI Agents tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose LangChain if you want the most established option — it has raised $35M, suggesting more runway for enterprise features, support, and long-term roadmap. For mission-critical workflows or larger teams, that stability often outweighs a lower monthly price.
Frequently asked questions
LangChain vs Vercel AI SDK — which is better?
It depends on your priority. LangChain has raised more capital and is the more established option; Vercel AI SDK has broader feature depth. See the side-by-side table above.
Is LangChain cheaper than Vercel AI SDK?
Yes — LangChain's cheapest paid plan is Plus · $39/mo, while Vercel AI SDK's is Open source.
Do LangChain and Vercel AI SDK offer free plans?
LangChain: Yes, has a free plan. Vercel AI SDK: Yes, has a free plan.
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