Langfuse competitors

Developer-first application monitoring platform that uses AI to achieve 95% root-cause accuracy on errors and is expanding into automated code remediation and AI code review.

Observability and AI Monitoring · Series E $90M

Observability and AI Monitoring

Series E

$90M

HQ

Provides the dominant open-source framework for building AI agents plus LangSmith, a commercial platform for tracing, evaluating, and monitoring LLM-powered applications in production.

Observability and AI Monitoring · Series B $125M

Observability and AI Monitoring

Series B

$125M

HQ

Observability platform built for high-cardinality data exploration, using AI-powered querying and anomaly detection to help engineering teams understand complex distributed systems.

Observability and AI Monitoring · Series D $50M

Observability and AI Monitoring

Series D

$50M

HQ

ML and LLM observability platform with OpenTelemetry-based tracing, real-time evaluations, and agent observability for multi-step AI agent traces in production.

Observability and AI Monitoring · Series C $70M

Observability and AI Monitoring

Series C

$70M

HQ