Respan
LLM tracing, evals, and gateway
The top alternatives to Chamber in the Observability, Prompts & Evals space, compared on features, pricing, and what they're best at.
Updated March 27, 2026
Chamber built Chambie, an AI-powered AIOps agent that autonomously monitors, root-causes, and remediates GPU infrastructure issues across clouds. Part of YC W2026, the company was founded by four ex-Amazon engineers: Charles Ding (CEO, second-time founder with a .5M ARR exit), Andreas Bloomquist (launched AWS CloudWatch Application Signals), Jason Ong (GPU scheduling at Amazon), and Shaocheng Wang (9.5+ years at AWS).
Respan
LLM tracing, evals, and gateway
LangSmith
Trace visualization for LLM chains
MLflow
OpenTelemetry-native tracing
Weights & Biases
ML experiment tracking
Langfuse
Open-source LLM observability
Arize AI
ML observability with LLM support
Traceloop
OpenTelemetry
Datadog LLM
LLM monitoring within Datadog platform
Helicone
Braintrust
Real-time LLM logging and tracing
HoneyHive
Prompt management
Patronus AI
Automated LLM evaluation platform
Phoenix
OpenTelemetry-based LLM and agent tracing
Promptfoo
Portkey
Humanloop
Ragas
RAG-specific evaluation framework
Sentry
DeepEval
LangWatch
Multi-turn agent simulation testing
Galileo AI
LLM output quality evaluation
PromptLayer
Maxim AI
Distributed tracing for LLM and agent apps
Confident AI
DeepEval open-source evaluation framework
Opik
Agenta
Future AGI
Multimodal evaluation (text, image, audio, video)
Lunary
Parea AI
Moda
Hallucination detection
Ashr
Multi-modal synthetic testing
Sentrial
Agent failure root cause analysis
Athina AI
One platform for routing, observability, tracing, and evals across every LLM provider.