LangWatch vs Traceloop
Which Evaluation AI tool is better in 2026?
LangWatch
Platform for LLM evaluations, agent testing and observability
Traceloop
LLM observability and reliability built on the open-source OpenLLMetry standard
Side-by-side
Traceloop is the more established option (raised $6.1M); pricing is comparable on both sides.
| Metric | LangWatch | Traceloop |
|---|---|---|
| Taglinei | Platform for LLM evaluations, agent testing and observability | LLM observability and reliability built on the open-source OpenLLMetry standard |
| Foundedi | 2023 | 2023 |
| HQi | Amsterdam, NL | Tel Aviv, Israel |
| Employeesi | 1-10 | 1-10 |
| Neuron scorei | 49 | 64🏆 |
| Total fundingi | $1.1M | $6.1M🏆 |
| Latest roundi | Pre-Seed · Jan 2024 | Seed · May 2025 |
| Valuationi | — | — |
| Cheapest paid plani | Pricing not disclosed | Pricing not disclosed |
| Free plani | ✓ | ✓ |
| Free triali | ✗ | ✓ |
| Top tier pricei | Pricing not disclosed | Pricing not disclosed |
| Pricing summaryi | Open source | Free |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for LangWatch and Traceloop.
| Capability | LangWatch | Traceloop |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✓ | ✓ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | — |
| Free plan | ✓ | ✓ |
| Free trial | ✗ | ✓ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of LangWatch
- Strong in AI Evaluation
🔵 Strengths of Traceloop
- Has raised more capital ($6.1M vs $1.1M)
- Higher Neuron score (64 vs 49)
- Offers a free trial
Which should you choose?
Choose Traceloop if price matters most — it starts at Free, which is friendlier for teams watching burn. Both AI Evaluation tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose Traceloop if you want the most established option — it has raised $6.1M, 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
LangWatch vs Traceloop — which is better?
It depends on your priority. LangWatch is the leaner option; Traceloop has broader feature depth. See the side-by-side table above.
Is LangWatch cheaper than Traceloop?
No — Traceloop's cheapest paid plan is Free, while LangWatch's is Open source.
Do LangWatch and Traceloop offer free plans?
LangWatch: Yes, has a free plan. Traceloop: Yes, has a free plan.
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