LangWatch
By Reasoning Engine B.V.
AI platform and engineering teams with agents already in or nearing production that need regression testing, automated scoring and production trace visibility across Python, TypeScript or OpenTelemetry instrumentation. Also fits data-sovereignty-sensitive organisations that need self-hosted, VPC or air-gapped deployment.
Metered SaaS plus seats, not a flat subscription. Developer tier is €0 with 50k events/month, 14-day data access, 2 users and limits of 3 scenarios, 3 simulations and 3 custom evals. Growth is €29 per core seat per month with 200k events included, then €5 per 100k events, and 30-day retention includ
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