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Langfuse vs Resonance
Langfuse provides observability for LLM apps, while Resonance is a full-stack PHP framework.
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LangfuseOpen Source Observability & Analytics for LLM Apps 🕵️♂️
ResonancePHP Framework That Solves Real-Life IssuesWhich to pick
Pick Langfuse if you want…
- LLM observability & analytics
- Integrations with Python, TypeScript or Go (on Langfuse's list, not Resonance's)
Pick Resonance if you want…
- Async PHP for IO-heavy apps
- A free, open-source tool
- Integrations with Swoole, llama.cpp or Rubix ML (on Resonance's list, not Langfuse's)
Side by side
- What it is
- Langfuse:Langfuse is an open-source platform for tracing, evaluating and monitoring LLM applications and AI agents.
- Resonance:Resonance is an async PHP framework for building IO-intensive, AI-enabled web applications with REST, GraphQL, WebSockets, gRPC and more.
- Best for
- Langfuse:LLM observability & analytics
- Resonance:Async PHP for IO-heavy apps
- Who it’s for
- Langfuse:Developers building, debugging and scaling LLM-based apps and agents.
- Resonance:PHP developers building high-performance SaaS, real-time, or AI-driven services
- Pricing
- Langfuse:Freemium
- Resonance:Open source
- Plans
- Langfuse:Hobby Free · Core $29 per month · Pro $199 per month · Enterprise $2499 per month
- Resonance:—
- Open source
- Langfuse:Yes, 35,097 GitHub stars
- Resonance:Yes
- Works with
- Langfuse:Python, TypeScript, Go, Java, .NET, Ruby, PHP, Swift
- Resonance:Swoole, llama.cpp, Rubix ML
Langfuse features
- Hierarchical Traces. Capture every LLM call, tool invocation and retrieval step with filters for user, session, cost and latency.
- Prompt Management. Version, fetch, release and cache prompts separately from code with one-click deployments.
- Evaluation Engine. Run LLM-as-judge, heuristic or human-review evaluations on production data or experiments.
- Experiments & Datasets. Define test cases, run experiments and create golden datasets for continuous improvement.
- Dashboards & Alerts. Monitor cost, latency and quality via custom dashboards and automated alerts.
- Human Annotation. Collaborative human-in-the-loop workflows with annotation queues.
- Extensive Integrations. Supports Python, TypeScript, Go, Java, .NET, Ruby, PHP, Swift and 100+ agent frameworks and model providers.
- Self-hosted & Cloud Options. Available as hosted SaaS or self-hosted under MIT license.
Resonance features
- Asynchronous PHP core. Leverages Swoole to run non-blocking code and promises for high-throughput workloads.
- Built-in AI integration. Connects to open-source LLMs via llama.cpp and supports Rubix ML model serving.
- Real-time messaging. Provides WebSocket and gRPC tools for low-latency communication.
- Opinionated DI container. Attribute-based dependency injection prevents cyclical services and simplifies setup.
- GraphQL out of the box. Define schemas with PHP attributes; fields resolve asynchronously.
- Security & OAuth 2.0. Includes ready-to-use OAuth 2.0 authentication and other security features.
Langfuse vs Resonance FAQ
Is Langfuse or Resonance free?+
Langfuse has a free plan (Hobby); paid plans start at $29/month (Core). Resonance is free and open source.
Which is cheaper, Langfuse or Resonance?+
Resonance is free, so it costs less. Langfuse starts at $29/month (Core).
Is Langfuse or Resonance open source?+
Yes, both are open source: Langfuse (langfuse/langfuse on GitHub) and Resonance (distantmagic/resonance on GitHub).
Do Langfuse and Resonance integrate with the same tools?+
Their integration lists don't overlap: Langfuse lists Python, TypeScript, Go, Java and 10 more; Resonance lists Swoole, llama.cpp and Rubix ML.
On DevHunt
Based on each tool's website and DevHunt data. Details may change; check the official sites.