LangWatch records 52,098 monthly visits with +73% month-over-month growth and Contact for Pricing pricing. Mastra records 318,954 monthly visits with -5% growth and Freemium, Contact for Pricing pricing.
Agent observability, evals and governance for AI platform teams
The TypeScript framework for building, deploying, and observing AI agents
| Dimension / Metric | | |
|---|---|---|
| Official Domain | langwatch.ai | mastra.ai |
| Pricing Model | Contact for Pricing | Freemium, Contact for Pricing |
| Monthly Visits | 52.1K (52,098) | 318.95K (318,954) |
| MoM Traffic Delta | +21.98K (+73%) | -16.74K (-5%) |
| Primary Market & Share | 🇺🇸 United States (46.7%) | 🇺🇸 United States (21.3%) |
| Direct Visits / mo | 28.99K | 139.22K |
| User Rating | 4.6 | 4.6 |
| Supported Platforms | Website | Website |
Agent observability, evals and governance for AI platform teams
Full GenAI spec support means traces from LangChain, LangGraph, CrewAI, Mastra, Pydantic AI, the Vercel AI SDK and any OTel-compatible stack land in the same view, with tokens, cost and cache accounted per span.
Score single outputs or entire conversations with an LLM judge, custom code or a workflow, run evals from a notebook or UI, and evaluate live production traffic in real time.
Simulated text and voice users push agents turn after turn in realistic scenarios, runnable locally and in CI, with tools, skills and MCP servers traced and mockable.
Route OpenAI, Anthropic, Google, Bedrock, Mistral and other providers through one endpoint using your own keys, with budgets per person, team and customer and around 11 microseconds of overhead.
The TypeScript framework for building, deploying, and observing AI agents
Define agents with instructions, models, tools, and runtime behavior, then compose typed workflow steps with retries and branching in TypeScript.
Give agents long-lived context with observational memory, semantic recall, and thread-aware storage.
Traces, metrics, logs, and datasets show every model call, tool call, and handoff in a searchable timeline.
Score agent runs against repeatable checks and experiments before changes reach production.
SpecialistA robust workflow automation platform uniting visual node-based building with AI agent orchestration and extensive app connectors.
SpecialistA robust workflow automation platform uniting visual node-based building with AI agent orchestration and extensive app connectors.
SpecialistA developer platform providing pre-built integrations, authentication, and execution tools specifically for AI agents across third-party apps.
SpecialistA developer platform providing pre-built integrations, authentication, and execution tools specifically for AI agents across third-party apps.
Free / Open-sourceA comprehensive visual platform for building agent workflows and RAG pipelines via a no-code canvas instead of TypeScript.
Free / Open-sourceA comprehensive visual platform for building agent workflows and RAG pipelines via a no-code canvas instead of TypeScript.
Free / Open-sourceAn open-source AI automation platform combining conversational workflow drafting, visual flow builders, and prebuilt app connectors.
Free / Open-sourceAn open-source AI automation platform combining conversational workflow drafting, visual flow builders, and prebuilt app connectors.
Free / Open-sourceAgent observability, evaluation, and continuous improvement for production AI
Free / Open-sourceAgent observability, evaluation, and continuous improvement for production AI
Free / Open-sourceAI gateway, observability and guardrails for production LLM apps
Free / Open-sourceAI gateway, observability and guardrails for production LLM apps
SpecialistAn open-source AI workspace combining visual workflows and code for building and governing agent systems.
Free / Open-sourceA popular Python-based agent framework offering modular building blocks, tailored for Python developers rather than TypeScript.
Free / Open-sourceBuild, simulate, evaluate and monitor self-improving AI agents
Free / Open-sourceBuild, simulate, evaluate and monitor self-improving AI agents
Free / Open-sourceEvaluate, monitor, and govern your AI applications in production
Free / Open-sourceEvaluate, monitor, and govern your AI applications in production
Free / Open-sourceOpen-source AI gateway with observability and evals built in
Free / Open-sourceOpen-source AI gateway with observability and evals built in
Free / Open-sourceThe collaboration layer for AI engineering teams
Free / Open-sourceThe collaboration layer for AI engineering teams
