Best alternatives to Vercel AI SDK (2026)
15 verified developer tools alternatives to Vercel AI SDK, machine-checked for live status, real pricing, and genuine free tiers.
| Tool | Free tier | API | Freshness | Key difference |
|---|---|---|---|---|
| SpeakeasyFreemium | ✓ | ✓ | 100 | Verified free tier |
| SoftrFreemium | ✓ | ✓ | 100 | Verified free tier |
| ContinueOpen source | — | — | 100 | No public API |
| LocofyFreemium | — | — | 100 | No public API |
| LangSmithFreemium | — | ✓ | 100 | Freemium pricing |
| Weights & BiasesFreemium | — | ✓ | 100 | Freemium pricing |
| Stack AIFreemium | — | ✓ | 100 | Freemium pricing |
| LlamaIndexOpen source | — | ✓ | 100 | Data framework for LLM apps. |
| E2BUsage-based | — | ✓ | 100 | Usage-based pricing |
| Hotpot.aiFreemium | — | ✓ | 100 | Freemium pricing |
| Hugging FaceFreemium | — | ✓ | 100 | Freemium pricing |
| BriaFreemium | — | ✓ | 100 | Freemium pricing |
| WarpFreemium | — | — | 100 | No public API |
| LiteLLMOpen source | — | ✓ | 100 | Call 100+ LLMs with one SDK. |
| HumanloopFreemium | ✓ | ✓ | 100 | Verified free tier |