W&B Weave
Tracing, evaluation and production monitoring for LLM and agent applications, capturing each call so prompts and outputs can be scored over time.
Find alternatives to W&B Weave
One plan set covers both products with separate seat quotas: a Free tier, Pro from $60/month, and Enterprise on request, plus a $0 self-hosted Personal tier.
What it does
- Evaluation and observability
Sources
- Pricing
- Sold within
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The plan table lists "Free" at "$0/mo" including "AI application tracing", and meters "Weave data ingestion" per plan, with "Additional data ingestion $0.10/MB" on Free and "Additional data ingestion $0.20/MB" on Pro.
Also from Weights & Biases
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W&B Models Platform
Experiment tracking for model training runs, recording hyperparameters, metrics and artifacts so runs can be compared, swept and reproduced.
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W&B Registry Platform
Curated central repository providing versioning, aliases, lineage tracking and governance for models and datasets across the ML lifecycle.
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W&B Serverless Inference API service
Hosted inference service for open-source and commercial LLMs (OpenAI, Qwen, Llama, Kimi, Phi, DeepSeek, Z.AI) without managing infrastructure.
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W&B Serverless RL Platform
Managed reinforcement-learning fine-tuning service for LLMs on CoreWeave's managed GPU cluster, billed per-token for rollouts with automatic scale-to-zero.
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W&B Serverless SFT Platform
Serverless supervised fine-tuning for LLMs on CoreWeave's managed GPU cluster, run alongside Serverless RL in a unified workflow via the Agent Reinforcement Trainer (ART) API.
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