Best alternatives to LangSmith (2026)
15 verified code alternatives to LangSmith, machine-checked for live status, real pricing, and genuine free tiers.
| Tool | Free tier | API | Freshness | Key difference |
|---|---|---|---|---|
| SoftrFreemium | ✓ | ✓ | 100 | Verified free tier |
| Lumen5Freemium | — | — | 100 | No public API |
| ContinueOpen source | — | — | 100 | Open source |
| LocofyFreemium | — | — | 100 | No public API |
| RevidFreemium | ✓ | ✓ | 100 | Verified free tier |
| VEED.IOFreemium | ✓ | — | 100 | Verified free tier |
| Krea AIFreemium | ✓ | — | 100 | Verified free tier |
| Stack AIFreemium | — | ✓ | 100 | No-code AI agent builder. |
| Blackbox AIFreemium | — | — | 100 | No public API |
| OpenHandsOpen source | ✓ | ✓ | 100 | Open source |
| E2BUsage-based | — | ✓ | 100 | Open source |
| Plus AISubscription | ✓ | — | 100 | Verified free tier |
| Beautiful.aiSubscription | — | — | 100 | No public API |
| TraeFree | ✓ | — | 100 | Verified free tier |
| Steve AIFreemium | ✓ | — | 100 | Verified free tier |