Brandwave

Glean vs Notion:Which is more popular?

In September 2026, Notion had more branded searches than Glean among AI knowledge base tools worldwide. Notion had about 110,000 branded searches, while Glean had 320. Notion made up 11.3% of all AI knowledge base tool searches we track, and Glean accounted for 0.03%. When we asked ChatGPT and Google AI Overviews about AI knowledge base tools, Notion appeared in four of the five answers and Glean in three. Notion was mentioned before Glean in every answer that named either.

Among AI knowledge base tools worldwide in September 2026

Who do people search for more?

Notion, about 344 searches for every 1 for Glean

Notion 110K searchesGlean 320 searches

Who does AI mention more?

Notion, mentioned in 4 of 5 answers, Glean in 3

Notion in 4 of 5Glean in 3 of 5

Who does AI recommend more?

Notion, named ahead of Glean in 4 of 4 answers

Notion first in 4Glean never first

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Top AI knowledge base tools in ChatGPT and Google AI Overviews

In three ChatGPT questions and two Google AI Overviews, Notion was mentioned in four out of five: in all three ChatGPT answers and in one of the two Google AI Overviews. Glean was mentioned in three out of five: in all three ChatGPT answers, but not in either of the two Google AI Overviews. Notion was listed before Glean in every answer that named either.

Most recommended by AI

Brands get a higher ranking if they are mentioned earlier in the answers.

  1. Notion1st
  2. Guru2nd
  3. Confluence3rd
  4. Glean4th
  5. Document3605th
  6. Slite6th
  7. ProProfs7th
  8. Helpjuice–
  9. Slab–

Mentioned by AI

Each dot is one answer, filled in when that answer mentions the brand.

  • Confluence4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Notion4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Guru4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Slite3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Document3603 of 5Named in 1 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • Glean3 of 5Named in 3 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • ProProfs1 of 5Named in 0 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Helpjuice0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Slab0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers

See every answer about AI knowledge base tools

5 answers

Not named in any answer:

Brands are shown in the order each answer named them. The survey took place in the United States on October 20, 2026.

Is Glean or Notion more popular in search?

This chart shows how often people search Google for Glean and Notion by name. Each line represents a brand's share of searches for all nine AI knowledge base tools we track, month by month, from English-language searches worldwide.

Glean and Notion among AI knowledge base tools worldwide, by month

Share of searches by month for Notion, Glean. The figures are in the table below the chart.

View monthly share of searches table
MonthConfluenceNotionProProfsSliteDocument360HelpjuiceGleanSlabGuru
Oct 202582.9%11.1%2.2%2.2%0.82%0.66%0.06%0.01%<0.01%
Nov 202581.3%10.9%3.3%2.7%0.98%0.8%0.07%0.01%<0.01%
Dec 202582.3%11.1%2.2%2.7%0.81%0.81%0.07%0.01%<0.01%
Jan 202681%13.3%2.2%2.2%0.65%0.65%0.05%0.01%<0.01%
Feb 202680.5%13.2%2.7%2.2%0.79%0.65%0.07%0.02%0.01%
Mar 202683.5%11.2%2.3%1.8%0.67%0.55%0.06%0.01%0.01%
Apr 202680.6%13.2%2.7%2.2%0.79%0.53%0.06%0.02%<0.01%
May 202680.9%13.2%2.7%2.2%0.53%0.43%0.06%0.01%0.01%
Jun 202685.1%9.4%1.9%2.8%0.45%0.37%0.04%<0.01%<0.01%
Jul 202679.9%13.1%2.1%3.9%0.52%0.34%0.05%0.01%0.01%
Aug 202680.5%13.2%2.2%3.2%0.53%0.35%0.05%0.01%<0.01%
Sep 202684.2%11.3%1.9%1.9%0.45%0.3%0.03%0.01%<0.01%

How has the Glean and Notion comparison changed over the last 12 months?

3 findings
  • Notion was ahead of Glean in every measured month of the 12 months ending September 2026.
  • Across the 12 months ending September 2026, Glean’s share of searches among AI knowledge base tools worldwide moved from 0.06% to 0.03%, and its estimated monthly branded searches moved from 590 to 320.
  • Across the 12 months ending September 2026, Notion’s share of searches among AI knowledge base tools worldwide moved from 11.1% to 11.3%, and its estimated monthly branded searches held steady at 110K.

How did search popularity change for AI knowledge base tools worldwide in September 2026?

2 changes

  1. In September 2026, Notion lost share of searches among AI knowledge base tools worldwide, from 13.2% to 11.3%.

  2. Estimated monthly branded searches for Glean worldwide fell 45.8% over 12 measured months, from 590 to 320 in September 2026.

How are branded searches counted?

2 search terms

Brandwave collects information about searches that people make online using Glean’s and Notion’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.

Glean

1 branded search term

  • glean search

Notion

1 branded search term

  • notion app

How the Brand Demand Index is measured

Other head-to-heads among AI knowledge base tools

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