Langfuse

Open source

Open source platform for tracing, monitoring, and evaluating LLM applications.

Pricing: free, subscription
Free tier: true
License: open-source
Open source: Yes

Editorial review

Langfuse has not yet been editorially reviewed. User reviews and published field data below are unaffected — we say so rather than implying an editorial verdict.

Facts & attributes

Every value carries its evidence state. “—” means unknown — never a silent default (P-02).

Identity · Taxonomy

Tags(open-source;cloud-native): llm evaluation, observability, open-source, tracingVerification pending

Platform · Deployment

Delivery model(SaaS;self-hosted;desktop;mobile;embedded;managed-cloud;appliance): SaaS, self-hostedVerification pending

Pricing · Licensing

Free plan(true/false): trueVerification pending
License model(proprietary;open-source;source-available;dual-license): open-sourceVerified
Pricing model(free;subscription;usage;seat;asset;transaction;revenue-share;perpetual;custom): free, subscriptionVerified
Source repository(HTTPS URL): https://github.com/langfuse/langfuseVerified
Starting price(29): 29Verified

Features · Product · Fit

Core capabilities(authoring;automation;analytics): LLM tracing and observability, LLM-as-a-judge and human evaluation, prompt management with versioning, playground and experiments, cost and latency monitoringVerification pending

Api · Integrations · Ecosystem

API available(true/false): trueVerification pending

Security · Privacy · Compliance

Security certifications(SOC 2 Type II;ISO 27001): SOC 2, ISO 27001Verification pending

Support · Docs · Services

Support channels(email;ticket;chat;phone;community): community forum, vendor supportVerification pending

Audience · Use · Case

Best for(Neutral editorial summary): Open-source agent evaluation and observability platform with a free cloud tier, self-hosting and 100+ integrations.Verification pending
Company-size fit(individual;SMB;mid-market;enterprise): individual, SMB, mid-market, enterpriseVerification pending
Primary use cases(build;monitor;automate): AI agent observability, LLM application evaluation, prompt managementVerification pending

Lifecycle · Versioning

Maintenance status(active;maintenance;deprecated;EOL;archived): activeVerified

User reviews

Review policy

No published reviews yet.