NotebookLM vs Otter:Which is searched more?
In September 2026, NotebookLM had more branded searches than Otter among AI summarisation tools worldwide. NotebookLM had about 24.5 million branded searches, while Otter had 382,000. NotebookLM made up 81.9% of all AI summarisation tool searches we track, and Otter accounted for 1.3%. These are worldwide searches for English-language branded terms.
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Is NotebookLM or Otter more popular in search?
Compare the tools that summarise long documents and articles. Branded searches tell you how often people look for a brand by name or related terms. Comparing these searches across competitors helps you see how popular each brand is over time.
Share of searches by month for NotebookLM, Otter. The figures are in the table below the chart.
View monthly share of searches table
| Month | NotebookLM | QuillBot | Otter | Scholarcy | TLDR This |
|---|---|---|---|---|---|
| Oct 2025 | 54.9% | 42.2% | 2.6% | 0.19% | 0.02% |
| Nov 2025 | 58.9% | 38.9% | 2% | 0.14% | 0.02% |
| Dec 2025 | 71.4% | 26.8% | 1.7% | 0.12% | 0.02% |
| Jan 2026 | 75.1% | 23% | 1.8% | 0.1% | 0.01% |
| Feb 2026 | 75.1% | 23% | 1.8% | 0.1% | 0.01% |
| Mar 2026 | 75.2% | 23% | 1.8% | 0.1% | 0.01% |
| Apr 2026 | 81.6% | 16.7% | 1.6% | 0.07% | 0.01% |
| May 2026 | 81.9% | 16.8% | 1.3% | 0.06% | <0.01% |
| Jun 2026 | 81.9% | 16.7% | 1.3% | 0.05% | <0.01% |
| Jul 2026 | 81.2% | 17.2% | 1.6% | 0.04% | <0.01% |
| Aug 2026 | 78.7% | 19.7% | 1.5% | 0.04% | <0.01% |
| Sep 2026 | 81.9% | 16.7% | 1.3% | 0.05% | <0.01% |
How has the NotebookLM and Otter comparison changed over the last 12 months?
3 findings
- NotebookLM was ahead of Otter in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, NotebookLM’s share of searches among AI summarisation tools worldwide moved from 54.9% to 81.9%, and its estimated monthly branded searches moved from 11.9M to 24.5M.
- Across the 12 months ending September 2026, Otter’s share of searches among AI summarisation tools worldwide moved from 2.6% to 1.3%, and its estimated monthly branded searches moved from 569K to 382K.
How did search popularity change for AI summarisation tools worldwide in September 2026?
2 changes
In September 2026, NotebookLM gained share of searches among AI summarisation tools worldwide, from 78.7% to 81.9%.
Estimated monthly branded searches for Otter worldwide fell 32.8% over 12 measured months, from 569K to 382K in September 2026.
How are branded searches counted?
12 search terms
Brandwave collects information about searches that people make online using NotebookLM’s and Otter’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.
NotebookLM
2 branded search terms
- notebook lm
- notebooklm
Otter
10 branded search terms
- otter ai
- otter ai app
- otter ai notetaker
- otter ai transcription
- otter app
- otter meeting notes
- otter transcribe
- otter transcription
- otter.ai
- otterai
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