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Langfuse vs Wraith
Short answer: Pick Langfuse if you want LLM observability & analytics; pick Wraith if you want stealth AI support during interviews. Langfuse has a free plan, paid from $29/month; Wraith is paid.
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LangfuseOpen Source Observability & Analytics for LLM Apps 🕵️♂️
WraithInvisible AI Interview AssistantWhich to pick
Pick Langfuse if you want…
- LLM observability & analytics
- A free plan to start with (Hobby)
- Open-source code (langfuse/langfuse on GitHub)
- Integrations with Python, TypeScript or Go (on Langfuse's list, not Wraith's)
Pick Wraith if you want…
- Stealth AI support during interviews
- Integrations with Ollama, Kilo Code or Windows (on Wraith'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.
- Wraith:Invisible AI assistant that helps developers answer technical interview questions discreetly.
- Best for
- Langfuse:LLM observability & analytics
- Wraith:Stealth AI support during interviews
- Who it’s for
- Langfuse:Developers building, debugging and scaling LLM-based apps and agents.
- Wraith:Developers preparing for live technical interviews.
- Pricing
- Langfuse:Freemium
- Wraith:Paid
- Starting price
- Langfuse:$29/month (Core)
- Wraith:—
- Free plan or trial
- Langfuse:Free plan (Hobby)
- Wraith:No
- Plans
- Langfuse:Hobby Free · Core $29 per month · Pro $199 per month · Enterprise $2499 per month
- Wraith:—
- Open source
- Langfuse:Yes, 35,097 GitHub stars
- Wraith:—
- Works with
- Langfuse:Python, TypeScript, Go, Java, .NET, Ruby, PHP, Swift
- Wraith:Ollama, Kilo Code, Windows, macOS, Linux
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.
Wraith features
- Ghost Capture. Keeps the app frameless and out of shared-screen view.
- Session Memory. Three-layer in-memory context tracks interview turns and follow-ups.
- Resume Intelligence. Injects your resume data into prompts for personalized answers.
- Connector System. Supports local Ollama and Kilo Code cloud models via a unified API.
- Stealth Browser. Hardware toggles control mic, camera, audio and invisibility mode.
- Smart Follow-up Detection. Auto-detects elliptical questions and rewrites them with full context.
- Stream Cancel. Allows aborting any in-flight AI response instantly.
- GPU Offload Controller. Adjusts GPU usage for real-time inference performance.
Langfuse vs Wraith FAQ
What is the difference between Langfuse and Wraith?+
Langfuse: Observability for LLM apps, unrelated to interview assistance.
Should I use Langfuse or Wraith?+
Pick Langfuse if you want LLM observability & analytics, a free plan to start with (Hobby) or open-source code (langfuse/langfuse on GitHub). Pick Wraith if you want stealth AI support during interviews or integrations with Ollama, Kilo Code or Windows (on Wraith's list, not Langfuse's).
Is Langfuse or Wraith free?+
Langfuse has a free plan (Hobby); paid plans start at $29/month (Core). Wraith is paid.
Is Langfuse or Wraith open source?+
Langfuse is open source (langfuse/langfuse on GitHub). DevHunt has no public source repository on record for Wraith.
Do Langfuse and Wraith integrate with the same tools?+
Their integration lists don't overlap: Langfuse lists Python, TypeScript, Go, Java and 10 more; Wraith lists Ollama, Kilo Code, Windows, macOS and 1 more.
On DevHunt
Based on each tool's website and DevHunt data. Details may change; check the official sites.