How do their growth rates compare?

LangWatch has a month-over-month growth rate of +73%; Respan has -14.5%.

How does pricing compare?

LangWatch: Contact for Pricing. LangWatch publishes a dedicated pricing page alongside a book-a-demo path, with plans that scale from individual and team use to enterprise. Self-hosting is available as an option, and the project has open-source roots, but specific tier prices, seat limits and credit allowances should be confirmed on the vendor's current pricing page. Respan: Freemium. Freemium. There is a free tier plus volume-based and enterprise options that require contacting sales; token pricing varies by model, and Respan advertises bulk rates with a 0% routing fee. Verify current figures on the official pricing page.

What are alternatives to LangWatch and Respan?

Other tools in related categories include OpenRouter, OrcaRouter, LiteLLM, Arize AI, Portkey.

LangWatch vs Respan — Traffic (52.1K vs 91.5K), Pricing & Verdict

Open AI Tools

LangWatch vs Respan — Traffic (52.1K vs 91.5K), Pricing & Verdict | Open AI Tools

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	LangWatch	Respan
Official Domain	langwatch.ai	respan.ai
Pricing Model	Contact for Pricing	Freemium
Monthly Visits	52.1K (52,098)	91.5K (91,503)
MoM Traffic Delta	+21.98K (+73%)	-15.53K (-14.5%)
Primary Market & Share	🇺🇸 United States (46.7%)	🇺🇸 United States (28.8%)
Direct Visits / mo	28.99K	23.12K
User Rating	4.6	4.5
Supported Platforms	Website	Website

LangWatch

Agent observability, evals and governance for AI platform teams

OpenTelemetry-native tracing

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.

Offline and online evaluations

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.

Agentic testing and simulations

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.

AI Gateway and budgets

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.

Strengths & Pros

+OpenTelemetry-native with broad framework support, so adoption usually requires no rewrite
+Combines tracing, evals, agentic testing, gateway and red-teaming rather than covering only one layer
+Self-hosted, hybrid and cloud deployment options plus ISO 27001 and GDPR statements for security reviews