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Langfuse vs Weights & Biases

Langfuse or Weights & Biases? Their plans monthly and yearly, the capabilities their makers state, security and latest updates, side by side — read from the makers' own pages.

In short

  • Both: Command line, Self-hosted, API, Official SDKs, Traces and evaluates
  • Only Langfuse states: Choice of models
  • Only Weights & Biases states: Runs models for you, Builds agents and workflows

Langfuse

Langfuse traces, evaluates, and monitors AI agents and LLM applications, with prompt management, experiments, and cost analytics.

Plans

Hobby

Free

  • 50k units / month included
  • 30 days data access
  • 2 users
  • Community support via GitHub
  • All platform features (with limits)

Core

  • $29 / month
  • $8/100k units
  • 100k units / month included
  • 90 days data access
  • Unlimited users
  • In-app support
  • Everything in Hobby

Pro

  • $199 / month
  • $8/100k units
  • 100k units / month included
  • 3 years data access
  • Data retention management
  • Unlimited annotation queues
  • High rate limits
  • Prioritized in-app support

Enterprise

  • $2499 / month
  • $8/100k units
  • 100k units / month included
  • Audit Logs
  • SCIM API
  • Custom rate limits
  • Uptime SLA
  • Named lead support engineer

Prices checked 2026-09-25 on the maker’s page.

Capabilities

  • Command line — “Langfuse CLI Full API access from the terminal for agent workflows, scripts, and CI/CD.” source
  • Choice of models — “Test prompts on real production inputs and compare models side-by-side.” source
  • Self-hosted — “Self-host at scale” source
  • API — “REST APIs for everything” source
  • Official SDKs — “Best-in-class SDKs: Native SDKs for Python and JavaScript” source
  • Traces and evaluates — “Trace, evaluate, and improve AI agents with one open platform.” source

Security

  • SOC 2 Type II — “The production service is based on the same open-source Langfuse codebase, is covered by SOC 2 Type II and ISO 27001 audits, and undergoes annual third-party penetration tests.” source
  • SOC 2 — “We take active steps to demonstrate our commitment to data security and privacy such as annual SOC2 Type 2 and ISO27001 audits as well as External Penetration Tests.” source
  • ISO 27001 — “The production service is based on the same open-source Langfuse codebase, is covered by SOC 2 Type II and ISO 27001 audits, and undergoes annual third-party penetration tests.” source
  • GDPR — “Langfuse is GDPR compliant, and offers data retention, data masking and data deletion capabilities to manage the processing of personal data .” source
  • HIPAA — “We offer a DPA , provide a HIPAA-ready region , and adhere to our Privacy Policy .” source
  • Data kept in the EU — “Langfuse Cloud – fully-managed SaaS (multi-tenant) with US, EU, Japan, and HIPAA data regions” source

Latest updates

About Langfuse

Weights & Biases

AI developer platform for tracking experiments, managing models and datasets, and evaluating and monitoring AI applications.

Plans

Free

Free

  • AI application evaluations
  • AI application tracing
  • AI application scorers
  • AI model experiment tracking
  • AI assets registry & lineage tracking
  • Community Support

Pro

  • Starts at $60/month, billed monthly
  • Unlimited teams for collaboration
  • Team-based access controls
  • Service Accounts
  • Priority email & chat support
  • CI/CD automations
  • Slack and email alerts

Enterprise

Price on request

  • Single tenant option with choice of region
  • HIPAA compliant option
  • Secure private connectivity
  • Customer-managed encryption key
  • Single Sign On
  • Automated user provisioning

Personal

Free

  • 1 user seat
  • Experiment tracking
  • Registry & lineage tracking
  • Run a W&B server locally on any machine with Docker and Python installed
  • For personal projects only. Corporate use is not allowed.

Advanced Enterprise

Price on request

  • Flexible deployment options
  • HIPAA compliant option
  • Secure private connectivity
  • Customer-managed encryption key
  • Single Sign On
  • Automated user provisioning

Free forever for academic research

Free

  • All the product features included on Pro
  • Unlimited tracked hours
  • 200GB of cloud storage
  • Up to 25GB/mo of Weave data ingestion
  • Up to 100 seats
  • Additional cloud storage can be purchased for $0.03 per GB, billed monthly

Prices checked 2026-09-25 on the maker’s page.

Capabilities

  • Command line — “You can then use the command line to start the server.” source
  • Self-hosted — “Self-hosting allows you to run Weights & Biases on your own infrastructure, giving you full control over your data and privacy.” source
  • API — “Each inference API has different costs for input and output tokens.” source
  • Official SDKs — “Core | Reports | Automations | SDK” source
  • Runs models for you — “Inference Access and explore hosted AI models” source
  • Builds agents and workflows — “W&B Weave: Build agentic AI applications” source
  • Traces and evaluates — “Monitor and analyze the performance of your GenAI models during development and in production, capturing inputs, outputs, and metadata for each inference.” source

Security

  • SOC 2 Type II — “We are certified under ISO/IEC 27001:2022, ISO/IEC 27017:2015, and ISO/IEC 27018:2019, and remain compliant with SOC 2 Type 2 and HIPAA standards.” source
  • SOC 2 — “We are certified under ISO/IEC 27001:2022, ISO/IEC 27017:2015, and ISO/IEC 27018:2019, and remain compliant with SOC 2 Type 2 and HIPAA standards.” source
  • ISO 27001 — “We are certified under ISO/IEC 27001:2022, ISO/IEC 27017:2015, and ISO/IEC 27018:2019, and remain compliant with SOC 2 Type 2 and HIPAA standards.” source
  • HIPAA — “We are certified under ISO/IEC 27001:2022, ISO/IEC 27017:2015, and ISO/IEC 27018:2019, and remain compliant with SOC 2 Type 2 and HIPAA standards.” source
About Weights & Biases