kitio.aiGemini Notebook vs Penelope.ai
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Gemini Notebook starts at $19.99/mo and Penelope.ai starts at See pricing page. Check both pricing pages for current plans.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Source-grounded chat
- Audio overviews
- Video overviews
- Mind maps
- Source discovery
- 30+ configurable manuscript checks
- Ethics and declarations checks
- Reference checking
- Annotated interactive report
- Manuscript Manager integration
- Metadata extraction
| Feature | Gemini Notebook | Penelope.ai |
|---|---|---|
| Best for | Google's AI research notebook, formerly NotebookLM | Automated checks that a manuscript meets a journal's requirements |
| Category | Research & search | Research & search |
| Pricing model | Freemium | Paid |
| Starting price | $19.99/mo | See pricing page |
| Free plan | Yes | No |
| Made by | Penelope.ai | |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Gemini Notebook starts at $19.99/mo and Penelope.ai starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Free
Free
- Source-grounded notebooks
- Standard usage limits
Google AI Pro
$19.99/mo
- Higher notebook and source limits
- More audio and video overviews
Google AI Ultra
$99.99/mo
- Starting price
- Highest usage limits
5 plans
Under 500 submissions
£750/yr
- £1.50 per submission
- Full suite of checks
501 to 1,000 submissions
£1,350/yr
- £1.20 per submission
- Full suite of checks
1,001 to 2,500 submissions
£2,850/yr
- £1.00 per submission
- Full suite of checks
2,501 to 5,000 submissions
£4,850/yr
- £0.80 per submission
- Full suite of checks
Over 5,000 submissions
Custom
- £0.80 per submission
- Custom annual price
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Gemini Notebook
- Answers stick to your sources
- Audio overviews are engaging
- Generous free tier
- Source limits per notebook
- Weak at sharing and exports
Penelope.ai
- Results are explained, not a black box
- Each journal can set its own rules
- Option to offer author-paid checks for free
- Integrates only with Manuscript Manager so far
- Prices listed only in pounds
- Aimed at journals rather than individual authors
Which one should you choose?
Choose Gemini Notebook if you want:
- Answers stick to your sources
- Audio overviews are engaging
- Generous free tier
Watch out: source limits per notebook.
Choose Penelope.ai if you want:
- Results are explained, not a black box
- Each journal can set its own rules
- Option to offer author-paid checks for free
Watch out: integrates only with manuscript manager so far.
Gemini Notebook vs Penelope.ai FAQ
What is the difference between Gemini Notebook and Penelope.ai?
Gemini Notebook: Google's AI research notebook, formerly NotebookLM. Penelope.ai: Automated checks that a manuscript meets a journal's requirements. Both are research & search tools.
Is Gemini Notebook or Penelope.ai cheaper?
Gemini Notebook starts at $19.99/mo and Penelope.ai starts at See pricing page. Check both pricing pages for current plans.
Do Gemini Notebook and Penelope.ai have free plans?
Gemini Notebook: Yes. Penelope.ai: No.
Who makes Gemini Notebook?
Gemini Notebook is made by Google, based in United States.
Who makes Penelope.ai?
Penelope.ai is made by Penelope.ai.
Which should I choose, Gemini Notebook or Penelope.ai?
Choose Gemini Notebook if you value answers stick to your sources and audio overviews are engaging. Choose Penelope.ai if you value results are explained, not a black box and each journal can set its own rules.