Open source platform to trace, evaluate, and improve AI agents and LLM applications.
Langfuse is an open source observability and evaluation platform for AI engineering teams building LLM agents and applications. It provides hierarchical tracing of model calls, tool use, and retrieval steps, along with evaluation through LLM-as-a-judge, heuristic functions, and human review. Teams use it for prompt management, a playground for testing prompts, experiments, cost and latency monitoring, and human annotation workflows. It works with any language or framework supporting OpenTelemetry and offers over 100 integrations. It is sold as a hosted service with a free plan and paid tiers, and can also be self-hosted under an MIT license.
Free
$29/mo
$199/mo
$2,499/mo
Prices in USD, as shown by langfuse.com. Source: pricing page. Last checked October 30, 2026.
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I want to decide whether Langfuse (langfuse.com) is the right tool and which plan to pick. Below is what the StableMRR pricing directory read from Langfuse's own pricing page (last checked 2026-10-30). It can be out of date, so treat it as a starting point. Category: Developer tools / Monitoring and observability What it does: Open source platform to trace, evaluate, and improve AI agents and LLM applications. Plans: - Hobby: Free. Limits: Included units 50k units / month, Data access 30 days, Users 2, Ingestion throughput 1,000 requests / min, Annotation queues 1 queue, Alerts 2 alerts. Includes: All platform features with limits, LLM tracing and graphs, Prompt management, Evaluation and datasets, Custom dashboards - Core: $29/mo. Limits: Included units 100k units / month, Additional usage $8/100k units, Data access 90 days, Users Unlimited, Ingestion throughput 4,000 requests / min, Annotation queues 3 queues. Includes: Everything in Hobby, Unlimited users, In-app support, Longer data access, Higher rate limits - Pro: $199/mo. Limits: Included units 100k units / month, Additional usage $8/100k units, Data access 3 years, Users Unlimited, Ingestion throughput 20,000 requests / min, Alerts 50 alerts. Includes: Everything in Core, Data retention management, Unlimited annotation queues, High rate limits, SOC2 and ISO27001 reports - Enterprise: $2,499/mo. Limits: Included units 100k units / month, Additional usage $8/100k units, Data access 3 years, Users Unlimited, Ingestion throughput Custom, Alerts 100 alerts. Includes: Everything in Pro plus Teams, Audit logs, SCIM API, Custom rate limits, Uptime SLA Alternatives in the directory: AgentGov, ActivityProof, Adadot, Adversemonitor Pricing page: https://langfuse.com/pricing Directory listing: https://stablemrr.com/p/langfuse-com First ask me three short questions about my team size, budget and what I need it for. Then recommend one plan, tell me what could make it a bad fit, and compare it with the alternatives. Finish with what I should check on the vendor's site before I pay.
No price changes recorded since we started tracking on October 30, 2026.
| Product | Category | Free plan | Paid from | Plans | Checked |
|---|---|---|---|---|---|
| AgentGovMonitors, traces and governs AI agents with cost analytics, incident tracking and EU AI Act compliance tools. | Monitoring and observability | Yes | $29/mo | 4 | Oct 29, 2026 |
| ActivityProofCreates a live shipping-status badge for product sites, driven by GitHub commit activity. | Monitoring and observability | No | - | 2 | Oct 29, 2026 |
| AdadotDeveloper analytics platform that benchmarks engineering metrics and collaboration data to help teams understand productivity and wellbeing. | Monitoring and observability | Yes | $10/mo | 4 | Oct 29, 2026 |
| AdversemonitorMonitors company names and domains for dark web and ransomware mentions and shows the matching source records. | Monitoring and observability | No | - | 3 | Oct 29, 2026 |
| Agent PetsChrome extension that turns coding agent sessions into pets and lets users approve prompts and reply from any tab. | Monitoring and observability | No | - | 1 | Oct 29, 2026 |
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How this page was made. Plans and prices are read automatically from langfuse.com's public pricing page, checked against the page text, and re-checked about every week. Method. Something wrong? Tell us.
