Langfuse vs Relatch
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
Langfuse compared with Relatch
| Detail | L
Langfuse | R
Relatch |
|---|
| What it does | Open Source Agent Evals & Observability
| Turn your documents into verified, portable skills for any AI agent
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| Stage | Established
| Not given
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| Founded | Not given
| Not given
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| Based in | DE
| IN
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| Pricing model | Freemium
| Free
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| Pricing | Not given
| Free during early validation phase with daily and weekly usage limits
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| Key features | - Hierarchical traces capture every LLM call, tool invocation, and retrieval step
- LLM-as-a-judge, heuristic functions, or human review evaluations
- Prompt management with one-click deployments and rollbacks
- Playground to test prompts on real production inputs and compare models
- Experiments with test cases and side-by-side comparison
- Human annotation and collaborative human-in-the-loop workflows
- Cost and latency monitoring with dashboards and alerts
- REST APIs and Query SDK for data access
- Langfuse Assistant to automate the AI engineering loop
| - Automatic document type detection
- Multi-format file support (PDF, DOCX, CSV, XML, Markdown, TXT, JSON)
- Claude Projects integration
- OpenAI Codex CLI export
- Privacy-first design with no data storage
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| What makes it different | - MIT licensed open source platform with no data lock-in
- Enterprise scale architecture handling billions of monthly events
- Works with any language and framework with no framework lock-in
- Async by default so tracing never blocks your application
| - Automatic structure detection and template selection based on document content type
- No coding experience required to create AI skill files
- Works with existing Claude and Codex accounts—no Pro required
- Fast processing—results in under one minute
- Client-side processing with immediate file deletion after use
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| Free plan | Not given
| Not given
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| Open source | Not given
| Not given
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| Platforms | Not given
| Not given
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| Public API | Not given
| Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 80 ▲ +1 (up) since last check | 4 ▲ +3 (up) since last check |
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| Trust Flow (Majestic) | 35 | 11 |
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| Citation Flow (Majestic) | 54 | 19 |
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| Referring domains (Majestic) | 6114 | 41 |
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5 details filled in for both companies.
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