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Free
Free hosted tier for POCs
- Platform
- All platform features on Hobby
- Billing
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Langfuse
● Identity checkedCode · Vendor site 2026-10-04
Langfuse is an open-source LLM engineering platform for tracing, evaluating, and improving AI agents with collaborative debugging and metrics. Langfuse Cloud offers hosted Hobby, Core, and Pro tiers metered in observability units.
- Category
- Code
- Free access
- Hobby cloud plan free with no credit card required
- API access
- SDKs and OpenTelemetry ingestion documented for tracing production LLM apps
Is Langfuse right for you?
A good fit for
AI engineers who need open-source-friendly observability and eval workflows without building tooling in-house.
Before you choose
Included units, data retention, and rate limits scale by tier; self-hosted remains available separately.
Overview
Langfuse gives teams tracing, prompt management, and evaluation tooling to ship reliable agents with measurable cost and quality.
What it can do
Features & capabilities
Unknown is different from unavailable. Each fact carries its own evidence.
| Capability | Value | Evidence | Checked |
|---|---|---|---|
| Observability | Traces LLM apps with prompts, scores, and collaborative debugging. | Facts sourced | 2026-10-04 |
| Open source | Core platform is open source with optional Langfuse Cloud hosting. | Facts sourced | 2026-10-04 |
| Evaluations | Supports agent evals and metrics to improve quality and cost. | Facts sourced | 2026-10-04 |
Understand the total cost
Langfuse pricing & plans
Core
$29.00 /mo
Monthly Langfuse Cloud subscription
- Units
- 100k units per month included
- Retention
- 90 days data access
Pro
$199.00 /mo
Monthly Langfuse Cloud subscription
- Units
- 100k units with higher limits on Pro
- History
- Unlimited history and higher rate limits
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Frequently asked questions
What is Langfuse used for?
Langfuse is an open-source LLM engineering platform for tracing, evaluating, and improving AI agents with collaborative debugging and metrics. Langfuse Cloud offers hosted Hobby, Core, and Pro tiers metered in observability units.
Does Langfuse have a free plan?
Hobby cloud plan free with no credit card required. This record lists ongoing free access; check the plan limits before starting.
How much does Langfuse cost?
The listed monthly price is $29.00 USD at monthly billing. See the plan cards for entitlements, billing commitments and seat minimums.
Can I use Langfuse through an API?
SDKs and OpenTelemetry ingestion documented for tracing production LLM apps. API access and subscription access may have different terms; consult the linked sources.
What should I check before choosing it?
Included units, data retention, and rate limits scale by tier; self-hosted remains available separately.
Price history
No retained pricing changes yet. A current price alone does not establish a historical trend.
How this profile is supported
Identity and profile
Reviewed vendor source
Read original source ↗Facts apply to the named version and check date. Send a sourced correction if something changed.