W&B Weave alternatives
6 evaluation tools in the same lane as W&B Weave, ranked by editorial score.
OP
Opik
Evaluation · Multi-model
7.3
Open-source LLM observability and evaluation platform for debugging and monitoring AI agents in production.
Freemium· Free open-source self-host; free Cloud tier (no card); Enterprise contact salesllm-tracingagent-evaluation
WB
Weights & Biases
Evaluation · Platform (any LLM)
8.4
The ML experiment tracker, now with LLM eval features.
Freemium· Free: $0/mo · Pro: Starts at $60/month · Enterprise: Custom plans · Personal: $0/mo · Advanced Enterprise: Custom planML experimentsLLM eval
HO
HoneyHive
Evaluation · Multi-model
8.1
OpenTelemetry-native observability and evaluation platform for LLM agents in production.
Freemium· Free tier available; paid/enterprise tiers via salesagent-observabilityllm-evaluation
AG
Agenta
Evaluation · Multi-model
6.9
Open-source LLMOps platform for prompt engineering, evaluation, and observability in one workspace.
Freemium· Hobby: $0 forever · Pro: $29 /month · Business: $299 /month · Enterprise: Custom · Open source: Free foreverprompt-engineeringllm-evaluation
TR
TruLens
Evaluation · Multi-model (LLM-as-judge)
8.1
Open-source evaluation and tracing framework for LLM apps and agents, built on OpenTelemetry.
Free· Free, open source (Apache-licensed Python package)llm-evaluationrag-evaluation
LA
Langfuse
Evaluation · Model-agnostic
7.3
Open-source LLM observability, prompt management, and evaluation in one platform.
Freemium· Free self-host & Hobby tier; Core $29/mo, Pro $199/mo, Enterprise $2,499/mollm-observabilityprompt-management