Langfuse

Visit site Alternatives

Score6.9

Rank#7 of 32

From$29/mo

Free planYes

Runs onAPI, Self-hosted, Web

Summary

Langfuse is an open-source AI engineering platform for teams debugging, analyzing, and iterating on AI agent applications. Its tracing records prompts, model responses, token usage, latency, tool calls, retrieval steps, and metadata. Prompt Management stores, versions, deploys, and tests prompts, linking them to traces. Evaluation tools include LLM-as-a-judge, code evaluators, user feedback, manual labeling, datasets, and experiments. Integrations include Python and JS/TS SDKs, OpenTelemetry, an API, CLI, MCP Server, and popular AI frameworks. Teams can self-host the MIT-licensed core on their infrastructure using Docker, with options including Docker Compose, Kubernetes, AWS, and Azure. Langfuse reports annual SOC 2 Type 2 and ISO 27001 audits, external penetration tests, GDPR compliance, a DPA, and a HIPAA-ready region. Cloud traffic uses TLS 1.2+ and stored data uses AES-256 encryption. The free Hobby plan includes 50k units per month, 30 days of data access, and two users. Core costs $29 per month, billed monthly.

Who it is for

Langfuse suits teams building AI agent applications that need tracing, prompt management, and evaluation tools. It also supports teams that want to self-host the core on their own infrastructure.

What is good

Traces prompts, tool calls, and retrieval steps
Prompt tools link versions to traces
Self-hostable MIT-licensed core
Includes multiple evaluation approaches

What to know first

Hobby includes two users
Hobby data access lasts 30 days
Core costs $29 per month, billed monthly

Verdict

Langfuse combines observability, prompt management, and evaluation for AI application teams. Its free Hobby plan has limits on users and data access, while Core is a paid monthly option.

Langfuse plans and pricing

All plans

Hobby Free 50k units / month included · 30 days data access · 2 users · Community support via GitHub langfuse.com · 30 Sept 2026

Core $29/mo monthly 100k units / month included · additional $8/100k units · 90 days data access · Unlimited users · In-app support langfuse.com · 30 Sept 2026

Pro $199/mo monthly 100k units / month included · additional $8/100k units · 3 years data access · Unlimited annotation queues · High rate limits · Prioritized in-app support langfuse.com · 30 Sept 2026

Teams Add-on $300/mo monthly Enterprise SSO · SSO enforcement · Fine-grained RBAC · Dedicated Slack / MS Teams Channel support langfuse.com · 30 Sept 2026

Enterprise $2,499/mo monthly 100k units / month included · additional $8/100k units · Audit Logs · SCIM API · Custom rate limits · Uptime SLA · Support SLA · Named lead support engineer langfuse.com · 30 Sept 2026

Compared on AI agent observability tools

Free plan: Yeslangfuse.com
Paid from: $29/molangfuse.com
Cost tracking: Yeslangfuse.com

Facts

Product: Langfuse is an open-source AI engineering platform that helps teams collaboratively debug, analyze, and iterate on AI agent applications.langfuse.com · 30 Sept 2026
Observability: Langfuse tracing records prompts, model responses, token usage, latency, tool calls, retrieval steps, and metadata.langfuse.com · 30 Sept 2026
Prompt management: Prompt Management stores, versions, deploys, tests, and links prompts to traces.langfuse.com · 30 Sept 2026
Evaluation: Evaluation features include LLM-as-a-judge, code evaluators, user feedback, manual labeling, datasets, and experiments.langfuse.com · 30 Sept 2026
Integrations: Langfuse supports Python and JS/TS SDKs, OpenTelemetry, API, CLI, MCP Server, and integrations with popular AI frameworks.langfuse.com · 30 Sept 2026
Self-hosting: Langfuse can be self-hosted with Docker on customer infrastructure, including Docker Compose, Kubernetes, AWS, and Azure deployment options.langfuse.com · 30 Sept 2026
Open source license: The core of Langfuse is MIT-licensed and available for self-hosting.langfuse.com · 30 Sept 2026
Security compliance: Langfuse reports annual SOC 2 Type 2 and ISO 27001 audits, external penetration tests, GDPR compliance, a DPA, and a HIPAA-ready region.langfuse.com · 30 Sept 2026
Encryption: Langfuse Cloud protects traffic with TLS 1.2+ and stored data with AES-256 encryption.langfuse.com · 30 Sept 2026
Access control: Langfuse supports role-based access control and enterprise single sign-on through OIDC.langfuse.com · 30 Sept 2026
Support: Hobby includes community support via GitHub, Core includes in-app support, Pro includes prioritized in-app support, and Enterprise includes support SLA and a named lead support engineer.langfuse.com · 30 Sept 2026
Company status: Langfuse joined ClickHouse in January 2026.langfuse.com · 30 Sept 2026