SiteList review score
Langwatch gives technical AI teams concrete testing and production signals. Slow mobile loads and feature-led comparisons make evaluation harder than it needs to be.
Reviewed on Oct 14, 2026
Langwatch
langwatch.ai
Unclaimed listingWhat it does
LangWatch is an AI agent engineering platform for testing and evaluating agents, with simulations, evaluations, observability, prompt management, and governance features.
Two ratings
Verified user rating
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No verified reviews yet — the evidence locker is empty.
Screenshots
Captured during our latest review on Oct 14, 2026
Pricing details
Developer plan is free forever; Growth is $34 per core seat per month, plus charges for events sent. Billed monthly. free plan · Developer plan is free forever; no credit card is required.
| Plan | Price | Details |
|---|---|---|
| Developer | $0 one time per free forever | Everything needed to start building and testing agents. 50k events per month · 14-day data access · 2 users · 3 scenarios, 3 simulations, and 3 custom evals · Community support View source |
| Growth | $34 monthly per per core seat | For teams shipping agents to production. View source |
Key features
Agent simulations
Testing
Runs realistic text and voice user scenarios against an agent before production.
LLM evaluation
Evaluation
Measures response quality and accuracy for agents.
LLM observability
Observability
Traces agent steps and monitors cost and latency.
AI gateway
AI infrastructure
Routes AI calls through one endpoint using customer-provided keys and budgets.
Prompt management
Prompt engineering
Versions, deploys, and A/B tests prompts with GitHub sync.
Voice AI testing
Testing
Tests and simulates voice AI agents at scale.
LLM red-teaming
Security testing
Uses simulated attacks to identify safety and security gaps in AI agents.
Who it’s for
AI agent testing
Run realistic user scenarios against agents before production.
Production agent monitoring
Trace agent steps and monitor cost and latency in production.
Prompt and agent improvement
Turn production traces into simulations and use evaluations to verify fixes.
Voice agent testing
Test voice AI agents with simulated conversations.
Buyer questions
Questions buyers actually ask
What is an automated AI engineer?
A coding agent embedded in the platform that performs agent evaluation and testing, trace analysis, prompt and code changes, and pull requests for team review.
Can Langy test voice agents?
Yes. Langy can test voice agents with simulated conversations scored against a rubric.
How do I track my Claude Code usage?
Run npx langwatch claude to configure Claude Code's native OpenTelemetry export to LangWatch; sessions are stored as traces with model turns, tool calls, tokens, and theoretical cost.
Product FAQ information · View source
The expert review
Langwatch scores 69/100, with strong technical positioning, concrete integrations, and useful benchmark evidence.
69/100: strong technical product, weak performance and comparison clarity
Verified user reviews
0 verifiedNo reviews yet. The evidence locker is empty.
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Scores across 13 dimensions
Brand & experience
Performance
Content & editorial
Trust & decision surfaces
Search & discoverability
Docs & measurement
- Domain
- langwatch.ai
- Category
- LLM observability & evaluation
- Pricing
- Freemium · $34/mo
- Platforms
- web, api
- Founded
- 2023
- Last checked
- Oct 14, 2026
- Public dimensions
- 13
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