✓ LangWatch
Simulate, evaluate, and trace AI agents to catch failures before they hit production.
Why we recommend them
LangWatch is a platform for testing, evaluating, and monitoring LLM-based agents, covering simulated user conversations, LLM-as-judge scoring, prompt versioning, and full OpenTelemetry-based tracing of tool calls, cost, and latency. It's built for teams shipping AI agents (chat, voice, or coding agents) who need to catch regressions and safety issues before and after release. It also includes red-teaming, governance controls for models/keys, and integrations with frameworks like Claude Code and Codex.
✓Self-hostable in about 15 minutes, or available as a hosted platform
✓OpenTelemetry-native tracing with full GenAI span support across any agent framework
✓Combines agent simulation testing, LLM evaluation, and production observability in one tool
What we actually verified
8.5/10 TrustScore—Money-back guarantee verified
✓Free trial available“…atch live on your stack, end to end. Talk to an engineer or start free in 5 minutes LangWatch The LLM engineering platform for te”
✓Reachable customer service“…V. · Built in Amsterdam. Privacy Terms Trust center Status mailto:[email protected] LangWatch pricing: free to start, scal…”
✓No fine-print return conditions
✓No unrealistic claims detected
Vetted 2026-07-13 · How we vet →
Straight referral — we earn nothing from this link.
Common questions about LangWatch
Is LangWatch legit and safe to buy from?
Yes — LangWatch passed the WhatiseBrokering.com vetting checklist (try before you buy, no fine-print returns, a real way to reach them, realistic claims only) before being listed. We remove companies that stop meeting the standard.
Can I try LangWatch before committing?
Yes — our vetting verified that LangWatch offers a free trial, so you can try before you pay. No fine-print traps were detected at the time of vetting.
How do I reach LangWatch if something goes wrong?
LangWatch publishes a real customer-service contact (phone or email) — that's a listing requirement. If you can't get a response, tell us at [email protected] and we'll review their listing.
Why is LangWatch listed on WhatiseBrokering.com?
We discovered and vetted LangWatch ourselves. They don't pay us anything — they're listed purely because they meet the standard.
Had a bad experience with LangWatch?
This directory only works if every listing keeps earning its place. If LangWatch didn't live up to the standard — refused a return, unreachable support, misleading claims, anything — tell us. We'll re-review them against our vetting criteria, and if they're not abiding by our rules, we remove the listing. No exceptions, no pay-to-stay.