LangWatch
Open-source LLMOps platform for tracing, evaluation and optimization
Overview
LangWatch is an open-source LLMOps platform offering real-time tracing, offline and online evaluations, dataset curation, prompt optimization and human-in-the-loop annotations in one framework-agnostic toolbox. It is OpenTelemetry-native and also includes an AI gateway with virtual keys, budgets, guardrails and provider fallback. It can be used free in the cloud, self-hosted or deployed on-prem.
Pricing
Pricing shown for reference only. These figures reflect RECATOOLS research as of 4 Jun 2026 and may be out of date or incomplete. This is not financial or purchasing advice — always confirm the current price on the provider’s official website before making any decision.
ASEAN Perspective
LangWatch in Southeast Asia
ASEAN-region availability and pricing notes coming soon. Drop the editorial team a note via /contact/ if you can supply local context (Singapore/Malaysia/Indonesia/Thailand/Vietnam).
LangWatch bundles observability, evaluation, prompt optimization and even an AI gateway into a single OpenTelemetry-native platform, which is broader scope than most evaluation-only tools. Self-host, on-prem and free cloud options give teams deployment flexibility.
It sits alongside Langfuse, LangSmith and Arize Phoenix in the open LLMOps space. The combined eval-plus-gateway story is appealing for teams that want fewer moving parts, though each individual capability faces strong specialist competition.
About this listing
This entry was compiled from publicly available data including LangWatch's official website, press releases, documentation, and reputable third-party publications. RECATOOLS is not affiliated with LangWatch unless explicitly stated.
Third-party AI tools update their pricing, features, availability, and policies frequently. Information here may be outdated by the time you read this — we make reasonable efforts to keep listings current, but cannot guarantee absolute accuracy.
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