One API key for hundreds of AI models from every major provider
#1LangWatch records 52,098 monthly visits with +73% month-over-month growth and Contact for Pricing pricing. Treg records 452,935 monthly visits with +223.4% growth and Freemium pricing.

Agent observability, evals and governance for AI platform teams
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | langwatch.ai | treg.to |
| Pricing Model | Contact for Pricing | Freemium |
| Monthly Visits | 52.1K (52,098) | 452.94K (452,935) |
| MoM Traffic Delta |
| +21.98K (+73%) |
| +312.9K (+223.4%) |
| Primary Market & Share | 🇺🇸 United States (46.7%) | 🇺🇸 United States (36.8%) |
|---|
| Direct Visits / mo | 28.99K | 235.3K |
|---|
| User Rating | 4.6 | 4.5 |
|---|
| 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.

One key for 4,100+ agent tools, pay per call
A single treg token routes to 4,100+ endpoints across 127 providers, so no per-provider signups or scattered key files.
See each provider's price plus measured success rate, speed, and last-answer time, and pin a preferred vendor when you want.
Pay fractions of a cent per call with the price shown before you commit, no monthly seats required.
Route calls through your existing provider keys at no markup; credentials are injected server-side and never stored on a machine.
One API key for hundreds of AI models from every major provider
#1
Provides comprehensive pre-built tool integrations for AI agents, but lacks Treg's open-source pay-per-call API catalog.

SpecialistProvides advanced browser automation and live web fetching, but lacks a general pay-per-call API marketplace.
#3
SpecialistExcels at AI-optimized web search and crawling data, but lacks broader multi-app tool integration capabilities.
One OpenAI-compatible gateway for adaptive LLM routing, guardrails, and spend control

Free / Open-sourceOffers an open-source AI gateway for model routing, but focuses on LLMs rather than general data endpoints.


Offers universal B2B data and tool integrations for agents, but focuses less on pay-per-call API monetization.

Delivers robust managed integration workflows and triggers for agents, but offers fewer native MCP-specific endpoints.

Free / Open-sourceAgent observability, evaluation, and continuous improvement for production AI

One universal API for 500+ AI models and 1,000+ agentic tools
Provides enterprise-grade AI gateway features and observability, but lacks open-source pay-per-call API monetization tools.
Free / Open-sourceDelivers open-source routing and failover for foundation models, but lacks Treg's extensive data endpoint catalog.
Provides comprehensive pre-built tool integrations for AI agents, but lacks Treg's open-source pay-per-call API catalog.
One OpenAI-compatible gateway for adaptive LLM routing, guardrails, and spend control
Free / Open-sourceAgent observability, evaluation, and continuous improvement for production AI
Provides enterprise-grade AI gateway features and observability, but lacks open-source pay-per-call API monetization tools.
Free / Open-sourceDelivers open-source routing and failover for foundation models, but lacks Treg's extensive data endpoint catalog.