# Langfuse

> Real-time LLM observability platform for debugging and improving AI applications

- **Canonical URI:** https://www.vioscale.ai/software/langfuse
- **Category:** MLOps & LLMOps Tools
- **Homepage:** https://langfuse.com
- **Also known as:** langfuse
- **Profile claimed by vendor:** no
- **Last updated:** 2026-08-01T21:23:46.810Z

## Vioscale score

**70.9 / 100**, confidence 37% (low).

Composite of weighted, independently-sourced signals (no user reviews, no vendor payment).

| Signal | Score | Weight | Contribution | Evidence present |
|---|--:|--:|--:|:--:|
| price_level | 0 | 10 | 0 | - |
| reliability | 50 | 12 | 600 | ✓ |
| capabilities | 86.7 | 32 | 2775 | ✓ |
| github_stars | 85.1 | 5 | 425.3 | ✓ |
| integrations | 0 | 18 | 0 | - |
| github_activity | 63.1 | 18 | 1135.8 | ✓ |
| release_cadence | 0 | 10 | 0 | - |
| security_posture | 80 | 12 | 960 | ✓ |
| package_downloads | 87.9 | 26 | 2285.9 | ✓ |
| pricing_transparency | 25 | 16 | 400 | ✓ |
| stackoverflow_activity | 0 | 12 | 0 | - |

## About

Langfuse is an open-source AI engineering platform that provides tracing, prompt management, evaluation, and metrics to help teams debug and continuously improve LLM-based applications. Supports hierarchical traces capturing every LLM call, tool invocation, and retrieval step with evaluation via LLM-as-a-judge, heuristic functions, or human review.

_Independently observed._

## Platform & deployment

- **Platforms:** CLI, Web
- **Deployment:** Cloud / SaaS, On-premise, Air-gapped, Self-hosted

## Capabilities

_The capabilities that matter for MLOps & LLMOps Tools. "-" = undocumented, not absent._

| Capability | Supported |
|---|:--:|
| **Core** | |
| Tool role | LLM observability / eval |
| **Deployment** | |
| Self-hostable / OSS core | ✓ |
| Managed cloud available | ✓ |
| **Observability** | |
| LLM tracing / observability | ✓ |
| Evaluation (offline / LLM-judge / human) | ✓ |
| **Dev** | |
| Prompt management + versioning | ✓ |
| **Tracking** | |
| Experiment tracking / model registry | - |
| **Serving** | |
| Model serving / inference endpoint | - |
| **Interop** | |
| OpenTelemetry / OpenLLMetry compatible | - |
| **Gateway** | |
| Multi-provider model support | ✓ |
| **Interop** | |
| Framework-agnostic | ✓ |
| **Data** | |
| No-train-on-customer-data guarantee | - |
| **Deployment** | |
| On-prem / VPC deployment | - |

## Facts

Every value below carries its source and our confidence. Facts are re-crawled on a freshness schedule.

### activity

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| activity.commits_last_30d | 100 | [link](https://github.com/langfuse/langfuse/pulse) | 2026-08-01 | 65% (medium) |

### adoption

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| adoption.github_stars | 32,275 | [link](https://github.com/langfuse/langfuse) | 2026-08-01 | 90% (high) |
| adoption.package_downloads_weekly | 5,875,179 | [link](https://pypistats.org/packages/langfuse) | 2026-08-01 | 60% (medium) |

### language

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| language.primary | TypeScript | [link](https://github.com/langfuse/langfuse) | 2026-08-01 | 63% (medium) |

### license

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| license.spdx | MIT | [link](https://www.npmjs.com/package/langfuse) | 2026-08-01 | 85% (high) |

### pricing

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| pricing.free_tier | yes | [link](https://langfuse.com) | 2026-08-01 | 48% (low) |
| pricing.model | freemium | [link](https://langfuse.com) | 2026-08-01 | 56% (medium) |

### reliability

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| reliability.status_page | yes | [link](https://status.langfuse.com) | 2026-08-01 | 60% (medium) |

### security

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| security.gdpr | yes | [link](https://langfuse.com/security) | 2026-08-01 | 75% (high) |
| security.hipaa | yes | [link](https://langfuse.com/security) | 2026-08-01 | 75% (high) |
| security.iso27001 | yes | [link](https://langfuse.com) | 2026-08-01 | 48% (low) |
| security.soc2 | yes | [link](https://langfuse.com) | 2026-08-01 | 48% (low) |

---
*Source: Vioscale (https://www.vioscale.ai/software/langfuse). Independent, evidence-based software intelligence. Cite the canonical URI.*