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 leads on both fronts — more capital raised ($125M) and a lower entry price than Vercel AI SDK.
| Metric | LangChain | Vercel AI SDK |
|---|---|---|
| Taglinei | Build context-aware AI applications | A unified TypeScript SDK for building AI apps with modern streaming, fallbacks, and multi-model support. |
| Foundedi | 2022🏆 | — |
| HQi | San Francisco, US | — |
| Employeesi | 50-100🏆 | — |
| Neuron scorei | 54 | 57🏆 |
| Total fundingi | $125M🏆 | Undisclosed |
| Latest roundi | Series B · Oct 2025 | — |
| Valuationi | $1.3B🏆 | — |
| Cheapest paid plani | Plus · $39/mo🏆 | Pricing not disclosed |
| Free plani | ✓ Developer | ✓ |
| Free triali | ✗ | ✗ |
| Top tier pricei | Plus · $39/mo | Pricing not disclosed |
| Pricing summaryi | 3 published plans | Open source |
| Categoriesi |
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 ($125M vs Undisclosed)
- Lower starting price ($39/mo)
- Newer company (2022)
- Verified profile
🔵 Strengths of Vercel AI SDK
- Higher Neuron score (57 vs 54)
- 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 $125M, 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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