Respan
Nested traces for every LLM call, tool run, and agent turn
36 Best Laminar Alternatives for Agent Observability (2026)
The top alternatives to Laminar in the Observability, Prompts & Evals space, compared on features, pricing, and what they're best at.
Updated October 6, 2026
Why look beyond Laminar?
Laminar is an open-source observability platform built for agents, with tracing, Signals that detect and cluster failures, evals on production data, and SQL access over everything it stores. People look for Laminar alternatives when they want prompt management in the same tool, a gateway for routing and failover, or pricing that meters something other than data volume.
Respan is the closest fit, bringing tracing, evals, prompt management, and an AI router into one platform. A failing trace becomes a dataset, the fix is tested against real cases, and the new prompt version ships without a code deploy, with every step tied back to the trace that started it.
Among the other tools on this list, Langfuse and Arize Phoenix are open-source and self-hostable, and Langfuse adds prompt management on top of tracing. LangSmith fits teams already built on LangChain and LangGraph, Braintrust is organized around running evals in CI, and AgentOps takes a session-replay approach to debugging agents.
Common reasons users explore alternatives
- No prompt management, so prompt versions live in a separate tool
- No LLM gateway, so routing, failover, and spend limits need another product
- Signals bill by usage on top of the plan, and the free tier gets only a one-time credit
- Free tier is limited to 1 project, 1 seat, and 7-day retention
Top alternatives to Laminar
Run Observability, Prompts & Evals in production with Respan
One platform for routing, observability, tracing, and evals across every LLM provider.
Trace, evaluate, and fix agents in one platform
10KFree traces/mo
1,000+Models
