Compare
Ko-Fi React Library vs Langfuse
Observability for LLM apps, unrelated functionality
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Ko-Fi React Library☕ Get tips and donations in your React projects.png?width=96)
LangfuseOpen Source Observability & Analytics for LLM Apps 🕵️♂️Which to pick
Pick Ko-Fi React Library if you want…
- Ko-Fi widgets for React
- A free, open-source tool
- Integrations with React or TailwindCSS (on Ko-Fi React Library's list, not Langfuse's)
Pick Langfuse if you want…
- LLM observability & analytics
- Integrations with Python, TypeScript or Go (on Langfuse's list, not Ko-Fi React Library's)
Side by side
- What it is
- Ko-Fi React Library:React library providing customizable Ko-Fi donation widgets for React apps
- Langfuse:Langfuse is an open-source platform for tracing, evaluating and monitoring LLM applications and AI agents.
- Best for
- Ko-Fi React Library:Ko-Fi widgets for React
- Langfuse:LLM observability & analytics
- Who it’s for
- Ko-Fi React Library:React developers who want to add tips and donations
- Langfuse:Developers building, debugging and scaling LLM-based apps and agents.
- Pricing
- Ko-Fi React Library:Open source
- Langfuse:Freemium
- Plans
- Ko-Fi React Library:—
- Langfuse:Hobby Free · Core $29 per month · Pro $199 per month · Enterprise $2499 per month
- Open source
- Ko-Fi React Library:Yes, 22 GitHub stars
- Langfuse:Yes, 35,097 GitHub stars
- Works with
- Ko-Fi React Library:React, TailwindCSS
- Langfuse:Python, TypeScript, Go, Java, .NET, Ruby, PHP, Swift
Ko-Fi React Library features
- KoFiDialog. Button that opens a modal with the Ko-Fi donation panel
- KoFiButton. Simple button that opens the Ko-Fi page in a new tab
- KoFiWidget. Floating Ko-Fi widget attached to the page bottom left
- KoFiPanel. Full Ko-Fi donation panel as a React component
- Tailwind support. Works with TailwindCSS and provides optional Tailwind config
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.
Ko-Fi React Library vs Langfuse FAQ
Is Ko-Fi React Library or Langfuse free?+
Ko-Fi React Library is free and open source. Langfuse has a free plan (Hobby); paid plans start at $29/month (Core).
Which is cheaper, Ko-Fi React Library or Langfuse?+
Ko-Fi React Library is free, so it costs less. Langfuse starts at $29/month (Core).
Is Ko-Fi React Library or Langfuse open source?+
Yes, both are open source: Ko-Fi React Library (Prototypr/react-kofi on GitHub) and Langfuse (langfuse/langfuse on GitHub).
Do Ko-Fi React Library and Langfuse integrate with the same tools?+
Their integration lists don't overlap: Ko-Fi React Library lists React and TailwindCSS; Langfuse lists Python, TypeScript, Go, Java and 10 more.
On DevHunt
Based on each tool's website and DevHunt data. Details may change; check the official sites.