langFUSE vs. OPIK
Opik & Langfuse: LLM Evaluation Platform Comparison
Compare the features, integrations, and strengths of Opik and Langfuse across evaluation, observability, and agent optimization.
Opik vs. Langfuse Feature Comparison
Opik and Langfuse are open source platforms that take two distinct approaches to supporting GenAI development. Opik provides end-to-end coverage from development to production, with an emphasis on LLM testing, observability, and optimization through prompt and tool tuning. Langfuse, by contrast, focuses on improving developer workflows during the build phase through structured prompt management and customizable dashboards for LLM observability.
| Feature | Details | Opik | Langfuse |
|---|---|---|---|
| Observability | |||
| LLM Tracing | Log LLM calls, responses, metadata, & user feedback scores |  Yes | Yes |
| Multi-Modal Evaluation | Evaluation support for images & videos | Yes |  No |
| Token & Cost Tracking | Visibility into key metrics | Yes | Yes |
| AI Framework Integrations | Native integrations with model providers & various frameworks | Yes | Yes |
| OpenTelemetry Integration | Native support with OpenTelemetry | Yes | Yes |
| Evaluation | |||
| Custom Metrics | Create your own LLM-as-a-Judge, or criteria-based metrics for evaluation | Yes | Yes |
| Built-In Evaluation Metrics | Out-of-the-box scoring and grading systems | Yes | Partial |
| Evaluation/ Experiment Dashboard | Interface to monitor evaluation results | Yes | Partial |
| Automated Dataset Expansion | Automatically expand datasets for robust evaluation | Yes | No |
| Agent Evaluation | Evaluate complex AI apps and agentic systems | Yes | Partial |
| Evaluation and Human Feedback for Conversations | Track annotator insights & scores in production | Yes | No |
| Human Feedback Monitoring | Track annotator insights & scores in production | Yes | Yes |
| Prompt Playground | Test & refine prompts and outputs from LLMs | Yes | Yes |
| Agent Optimization | |||
| Automated Agent Optimization | Automatically refine entire agents & prompts | Yes | No |
| Tool Optimization | Optimize how agents use tools | Yes | No |
| Production | |||
| Online Evaluation | Score production traces and identify errors within LLM apps | Yes | Yes |
| Alerting | Configurable alerts | Yes | Partial |
| TypeScript & JavaScript SDK | Developer SDK for JavaScript and TypeScript | Yes | Yes |
| In-Platform AI Assistant | Embedded assistant to guide workflows | Yes | No |
These Are Just the Highlights
Explore the full range of Opik’s features and capabilities in our developer documentation or check out the full repo on GitHub.
Opik’s Advantages
Opik sets itself apart with advanced GenAI optimization and highly flexible evaluation workflows, supporting a wide variety of agent frameworks, evaluation types, and production-level observability workflows. It excels at performance tuning, thread-level feedback, multimodal applications, and multi-agent optimization for complex GenAI environments.
Agent & Prompt Optimization
Opik’s Agent Optimizer offers six unique optimization algorithms to generate and refine the best prompts for each step in your agentic system.
Frameworks & Integrations
Opik integrates with 12+ agent frameworks and model providers, including support for LangGraph, CrewAI, AutoGen, OpenAI, and Hugging Face.
Evaluation Flexibility
Support for human feedback annotation at the thread level, automated dataset expansion, thread-level evaluation functionality & custom Python code metrics.
Reliability in Production
Opik provides comprehensive multi-turn conversation handling with logging, human feedback, and evaluation metrics that are effective in production.
Langfuse’s Advantages
Langfuse has rich features for prompt and app management. It provides advanced features for organizing and labeling prompts, tracking environments, and sharing insights via customizable dashboards.
Prompt Management
Langfuse offers protected prompt labels, versioning controls, and folder-based prompt organization.
Observability Controls
Environment labels, user tracking, and customizable metric dashboards enable Langfuse to support stricter dev/prod observability practices.
Custom Dashboards & Visuals
Langfuse includes a drag-and-drop dashboard builder with custom widgets for time series, bar charts, and key performance metrics.
Public Projects
Langfuse allows you to publicly share traces or dashboards via URL for easy collaboration or external stakeholder review.
“Opik being open-source was one of the reasons we chose it. Beyond the peace of mind of knowing we can self-host if we want, the ability to debug and submit product requests when we notice things has been really helpful in making sure the product meets our needs.”
Jeremy Mumford
Lead AI Engineer, Pattern
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