GILD verdict
Choose Notion AI if your company documents its work in Notion and keeps the rest in apps Notion connects to.
The seat includes search, writing, meeting notes and agents. Choose Glean if knowledge is spread across many systems, including Confluence, or the search tenant must run in your own cloud. Glean indexes Notion, so a company can run both.
GILD found no named team that has published running both or choosing between them; the call rests on where knowledge lives and on price. Notion AI wins for Notion-centered companies because AI comes with the Business or Enterprise seat, and Glean wins on reach. Notion AI connects about a dozen apps; Glean searches 275+ under a per-user license with no published price. Both enforce user permissions and run agents on company knowledge.
Choosing between Notion AI and Glean
Choose Notion AI if
- Most of your company's written knowledge already lives in Notion, and the rest sits in Slack, Google Drive, Microsoft 365, GitHub, or Linear.
- You want writing and meeting notes in the same workspace as search, under one seat price.
- You can work with connector history that starts one year before setup.
Choose Glean if
- Knowledge is spread across many systems, including Confluence and others Notion does not connect to.
- You need the search tenant in your own Google Cloud or AWS environment, which Glean offers as Customer Hosted.
- You want one assistant across every app, with Notion as one source among many.
Side by side
| Dimension | Notion AI | Glean |
|---|---|---|
| Primary job | AI inside the Notion workspace: an agent that writes and edits pages, Enterprise Search, AI Meeting Notes, and Custom Agents | Enterprise search and an assistant across company apps, with agents, agent orchestration, and Glean Protect |
| What it searches | The workspace plus Notion AI Connectors for Slack, Google Drive, Microsoft Teams, SharePoint and OneDrive, GitHub, Gmail, Outlook, Linear, Google Calendar, Box, and Asana, with Jira, Salesforce, and Notion Calendar in beta. Confluence is not on the list | 275+ out-of-the-box connectors, including Notion, Confluence, Slack, and Google Drive |
| Permissions | Answers only from pages the user can open; connector results filtered by each app's permissions at query time, with changes reflected within about an hour | Data permissions inherited from each source and strictly enforced |
| Agents | Custom Agents run on schedules and on Notion and Slack events, and act through MCP connections. They spend their owner's monthly Select credits, or Notion credits at US$10 per 1,000 monthly credits when an admin funds them | Agents started by a chat message, an input form, a change in a connected tool, or a daily or weekly schedule; scheduled runs stop after about 30 minutes |
| How you buy itChecked against each vendor's pricing pages on Oct 12, 2026. Glean publishes its licensing model but no dollar figures. | AI included on Business at US$20 per member per month billed yearly or US$24 billed monthly, and on Enterprise at custom pricing; Free and Plus get a limited trial | Per-user, per-month license (Core Suite or Enterprise Flex) with no public price; Enterprise Flex adds pooled FlexCredits that agent runs, premium-model reasoning, and Standard-model reasoning past 100 queries per user per week consume |
| Deployment | Notion's cloud service, used on web, desktop, and mobile | Glean Hosted SaaS, single-tenant in multiple GCP and AWS regions, or Customer Hosted as a managed service in your own GCP or AWS environment |
| Models | Models from OpenAI, Anthropic, and Google, with high credit consumption models on Notion credits at a substantially higher cost than the included models | Model Hub with models from OpenAI, Google, Anthropic, and Amazon |
| Data use | No training on customer data by default; on Enterprise most models keep data 0 days, and on other plans providers keep it 30 days or fewer | Core Suite includes zero LLM data retention; Glean says its search keeps training on each company's language and context to improve relevance |
| 200 seats a monthAsk Glean for a quote at your seat count; Notion's figure excludes agent credits. | US$4,000 on Business at US$20 a member billed yearly, with no Custom Agent credits. GILD's calculation from published rates, read Oct 28, 20261 | No published price; Glean sells by contract, so GILD could not compute a bill from published rates12 |
What practitioners report, side by side
Each product's figures come from its own practitioners, for the group you pick.
Overall signal
All users rate Glean +67, 77 points above Notion AI at −10. Most of the gap is in complaints, with 35 of Notion AI's 78 sources negative against 2 of Glean's 37.
The score counts the authors from all users that take a side, one vote each with their latest view, and is how far positive votes lead negative ones, per 100 votes, so Notion AI's −10 rests on votes split 27 positive, 15 mixed and 35 negative and Glean's +67 on 26, 8 and 2.
A lead of a fifth of the votes reads positive and a lead of half strong positive, with the same lines below zero. The dots show each source, positive, mixed, negative. Run a pilot with one team to measure how much of its planning and writing stays in the tool after a month.
Footprint on the AI Knowledge Work stack
They differ on three of 7 layers. Notion AI owns one that Glean does not. Coverage is each product's placement on this stack, as its product page shows it. Core is a job the product owns; Supports and Touches are jobs it helps with. Coverage says nothing about how well a product does them.
| Layer | Notion AI | Glean |
|---|---|---|
| Find | ||
| Web research | Supports | Touches |
| Create | ||
| Documents | Core | Touches |
| Meeting notes | Supports | Touches |
The 4 layers where they match
| Layer | Notion AI | Glean |
|---|---|---|
| Assist | ||
| AI assistant | Supports | Supports |
| Find | ||
| Enterprise search | Core | Core |
| Analyze | ||
| Data analysis | Touches | Touches |
| Automate | ||
| Automation | Supports | Supports |
What practitioners praise
Among all users, Glean alone has four praise themes that reach 5 sources from 3 authors. Cross-App Search and Connector Coverage lead, at 9 of 10 and 7 of 10. Both carry Agents & Automation. It is praised in 22 of the 29 Notion AI sources that discuss it, against 15 of 19 for Glean. Notion AI alone has three praise themes that reach 5 sources from 3 authors. Answers From Your Pages and Meeting Notes lead, at 13 of 15 and 6 of 11.
| Praised for | Notion AI | Glean |
|---|---|---|
| Agents & Automation | 22 of 29 | 15 of 19 |
| Answers From Your Pages | 13 of 15 | Not a theme in its sources |
| Meeting Notes | 6 of 11 | Not a theme in its sources |
| Writing & Editing | 5 of 7 | Not a theme in its sources |
| Cross-App Search | Not a theme in its sources | 9 of 10 |
| Connector Coverage | Not a theme in its sources | 7 of 10 |
| Permission-Aware Results | Not a theme in its sources | 5 of 6 |
| Grounded Answers | Not a theme in its sources | 4 of 8 |
Each count is the sources that praise a theme, or raise it as a concern, out of those that discuss it. A row pairs the two products when both carry a theme under the same or an equivalent name.
A count ending in "so far" has under 5 sources from 3 authors among all users. "Not a theme in its sources" means GILD found no theme of that name in that product's sources.
What practitioners raise as concerns
Among all users, Notion AI alone has three concern themes that reach 5 sources from 3 authors. Price & Plan Changes and Data Handling lead, at 22 of 23 and 10 of 13. Both carry Answer Accuracy. It is raised in all 11 Notion AI sources that discuss it, against 5 of 6 for Glean. Setup & Administration and Price & Licensing reach 5 sources from 3 authors only for Glean, at 7 of 8 and 3 of 6. Notion AI needs a pilot on the same projects before you choose on either.
| Raised as a concern | Notion AI | Glean |
|---|---|---|
| Answer Accuracy | 11 of 11 | 5 of 6 |
| Price & Plan Changes | 22 of 23 | Not a theme in its sources |
| Data Handling | 10 of 13 | Not a theme in its sources |
| Speed & Reliability | 5 of 5 | Not a theme in its sources |
| Setup & Administration | Not a theme in its sources | 7 of 8 |
| Price & Licensing | Not a theme in its sources | 3 of 6 |
16 sources
- Notion pricing
- Notion Help Center: Enterprise Search in Notion
- Notion Help Center: Notion AI Connectors overview
- Notion Help Center: Notion AI Connectors
- Notion Help Center: Enterprise Search security & privacy practices
- Notion Help Center: Notion AI security & privacy practices
- Notion Help Center: Custom Agents
- Notion Help Center: What are Notion credits?
- Glean: Enterprise search
- Glean: Connectors
- Glean: Notion integration with Glean
- Glean docs: Glean Core Suite
- Glean docs: Glean Enterprise Flex
- Glean docs: Glean deployment models
- Glean docs: Supported LLMs
- Glean docs: Types of agent triggers