Notion AI vs Typeahead

Option A

Notion AI

AI inside the wiki you already use: summaries and drafts next to the source page.

Best for

• Teams whose system of record is already Notion
• Summaries that must stay on the source page
• Wiki-heavy orgs that hate chat silos

Strengths

• No export step
• The AI sits where the work already lives

Trade-offs

• Leaks if sharing is already a mess
• Weak on documents that are not in Notion

Verdict

Notion AI is an amplifier of the workspace you have, including the ugly parts. ChatGPT and Claude remain better for long outside documents. Superhuman remains better for inbox. Typeahead remains better for local caret completion. Turn it on after teamspaces and guest rules are boringly correct. If you cannot explain who can see a page, you are not ready for a button that summarizes it. Confirm which AI features your plan actually includes — marketing pages and the seat you bought still drift.

Option B

Typeahead

On-device sentence completion for every Mac text field. Drafts stay on the machine.

Best for

• Mac writers who live in native text fields all day
• People who refuse to send drafts to a cloud model
• Ghost-text fans who already like IDE autocomplete

Strengths

• Private by construction, not by a settings toggle
• Latency feels like the OS, not like an API
• One job, finished

Trade-offs

• Mac only
• Will not become your editor or inbox

Verdict

Typeahead should be on the shortlist only if the problem is “finish this sentence in the field I am already in,” and the constraint is that the keystrokes cannot leave the machine. That is a real, narrow job. It is not a Notion replacement, not an inbox, and not a writing coach. Superhuman still wins if the unit of work is an email thread. Grammarly still wins if the unit of work is a grammar pass across browsers. Notion AI still wins if the draft has to live next to the rest of the wiki. Buy Typeahead when those products feel like too much surface area for a caret that just needs a next-token guess — and confirm the Mac-only license before you pitch it to a mixed-OS team.