# Langfuse vs Gemini Notebook

> Langfuse: Open-source platform to trace, evaluate and improve LLM applications and agents
> Gemini Notebook: Google's Gemini Notebook, formerly NotebookLM, answers questions and builds summaries from your own sources

- Langfuse profile: https://finderatlas.com/tools/langfuse
- Gemini Notebook profile: https://finderatlas.com/tools/notebooklm
- Comparison page: https://finderatlas.com/compare/langfuse-vs-notebooklm
- Last reviewed: November 2026

## Verdict

Langfuse is listed under Developer Tools and Gemini Notebook under AI Assistants. Gemini Notebook scores higher in FinderAtlas's editorial review (8.7 vs 8.4 out of 10). Both have a free plan or trial. Only Langfuse is available on CLI and offers an API. Only Gemini Notebook is available on iOS and Android.

### Choose Langfuse if

- You want a tool built for production tracing and debugging of LLM apps and agents, prompt versioning, and systematic evaluation on real data.
- MIT-licensed core with free self-hosting, avoiding vendor lock-in.
- Covers tracing, prompt management and evaluation in one platform.

### Choose Gemini Notebook if

- You want a tool built for summarizing and questioning your own documents.
- Answers cite the uploaded sources, so claims can be checked against the original text.
- Free Standard tier with 100 notebooks and 50 sources per notebook.

## Pricing

| | Langfuse | Gemini Notebook |
| --- | --- | --- |
| Pricing model | Freemium | Freemium |
| Free plan or trial | Yes | Yes |
| Starting price | $0 | $0 |

## Features

| Feature | Langfuse | Gemini Notebook |
| --- | --- | --- |
| Tracing | Yes | Not listed |
| Evaluation | Yes | Not listed |
| Prompt Management | Yes | Not listed |
| Playground | Yes | Not listed |
| Datasets and Experiments | Yes | Not listed |
| Cost and Latency Dashboards | Yes | Not listed |
| Open-Source Self-Hosting | Yes | Not listed |
| APIs and MCP Servers | Yes | Not listed |
| Source-grounded chat | Not listed | Yes |
| Audio Overviews | Not listed | Yes |
| Video Overviews | Not listed | Yes |
| Study tools | Not listed | Yes |
| Reports, slide decks and infographics | Not listed | Yes |
| Multiple source types | Not listed | Yes |
| Cloud computer | Not listed | Yes |
| Gemini app sync | Not listed | Yes |
| Sharing and public notebooks | Not listed | Yes |

## Platforms

| Platform | Langfuse | Gemini Notebook |
| --- | --- | --- |
| Web | Yes | Yes |
| Windows | No | No |
| macOS | No | No |
| iOS | No | Yes |
| Android | No | Yes |
| API | Yes | No |
| Browser Extension | No | No |
| CLI | Yes | No |

## Langfuse strengths

- MIT-licensed core with free self-hosting, avoiding vendor lock-in.
- Covers tracing, prompt management and evaluation in one platform.
- Free Hobby tier with 50k units per month and no credit card required.
- Over 100 integrations, plus OpenTelemetry for languages without a native SDK.
- Core plan at $29/month with unlimited users.

## Langfuse limitations

- Hobby is limited to 2 users and 30 days of data access.
- SOC 2, ISO 27001 and HIPAA support start at the $199/month Pro plan, and SSO and RBAC need a $300/month add-on.
- Audit logs, SCIM and SLAs are restricted to the $2,499/month Enterprise plan.
- Usage-based unit overage adds cost for high-volume tracing.

## Gemini Notebook strengths

- Answers cite the uploaded sources, so claims can be checked against the original text
- Free Standard tier with 100 notebooks and 50 sources per notebook
- Wide range of outputs, including Audio Overviews, Video Overviews, mind maps, flashcards, quizzes and slide decks
- Accepts PDFs, websites, YouTube videos, audio files, Google Docs and Google Slides
- Available on web, iOS and Android, and synced with the Gemini app

## Gemini Notebook limitations

- Works from the sources you add and is not built for live web news search
- Higher limits require a Google AI subscription; Ultra starts at $99.99 per month
- The cloud computer for code execution started with Ultra and Workspace AI Ultra Access customers, with Pro rollout still described as upcoming
- No public API for the consumer product, and the renamed brand can make older guides and app listings confusing

## FAQ

**Is Langfuse better than Gemini Notebook?**

It depends on your workflow. Langfuse is built for production tracing and debugging of LLM apps and agents, prompt versioning, and systematic evaluation on real data. Gemini Notebook is built for summarizing and questioning your own documents.

**What are the key feature differences between Langfuse and Gemini Notebook?**

Langfuse: Open-source platform to trace, evaluate and improve LLM applications and agents. Gemini Notebook: Google's Gemini Notebook, formerly NotebookLM, answers questions and builds summaries from your own sources.

**Does Langfuse or Gemini Notebook have a free plan?**

Yes, both do. Langfuse is freemium and Gemini Notebook is freemium, and each has a free plan or trial.

**Which is cheaper, Langfuse or Gemini Notebook?**

Both can be used for free. Paid plans differ in limits and features, so compare the tiers in the pricing table above.