Choose Langfuse if you need
- Integration with OpenAI, LangChain or LiteLLM. We haven't found them on W&B Weave's website.
- SOC 2, ISO 27001 or GDPR. We haven't found them on W&B Weave's website.
At a glance
- Langfuse has a free plan. We haven't confirmed one for W&B Weave.
- W&B Weave offers a free trial (length not stated). We haven't confirmed one for Langfuse.
- Langfuse's lowest paid plan is Core at $29 per month, as of November 14, 2026.
- They list no integrations in common.
- Both list HIPAA and SSO.
- Only Langfuse lists SOC 2, ISO 27001 and GDPR.
- Langfuse has a public API. We haven't confirmed one for W&B Weave.
- Both can be self-hosted.
From each tool's own website, checked on the dates below, and from published reviews.
Which to choose
From the facts checked for both tools, not from opinion. A fact we haven't confirmed for one of them is never counted.
Choose W&B Weave if you need
- Integration with Slack or Claude Code. We haven't found them on Langfuse's website.
Langfuse
Nobody has reviewed Langfuse yet. Its rating shows once it has 3 reviews.
Review Langfuse
W&B Weave
Nobody has reviewed W&B Weave yet. Its rating shows once it has 3 reviews.
Review W&B WeaveThe facts
- What it does
- LangfuseTrace, evaluate, and improve AI agents with one open platform.
- W&B WeaveObservability and continuous improvement for production agents.
- Free plan
- LangfuseYes
- W&B WeaveNot confirmed
- Pricing
- LangfuseNot confirmed
- W&B WeaveNot confirmed
- Paid plans from
- Langfuse
What they share
From the platforms and integrations each website lists.
Integrations
BothNone in common
Only Langfuse
- OpenAI
- LangChain
- LiteLLM
- Anthropic
- OpenRouter
- PostHog
Only W&B Weave
- Slack
- Claude Code
People who switched
Reviewers who say they used one of these before the other.
No reviewer has said they moved between Langfuse and W&B Weave yet.
Used either of them?
Your review makes this comparison better for the next person. Review Langfuse or review W&B Weave.