"AI email assistant" now labels everything from an autocomplete widget to software that runs your whole inbox, which makes the category genuinely hard to shop. Strip the marketing and there are four kinds of tool, distinguished by which layer of email work they take off your hands.
The four kinds
- Compose helpers. Suggest text as you type (think Smart Compose). They speed up sentences, not email. Your inbox is exactly as full as before.
- Triage tools. Sort arrivals by predicted importance. Useful filtering, but everything still lands undecided; you've gained tidier piles, not fewer decisions.
- Inbox agents. Do the reading layer end to end: sort what needs you, extract tasks and deadlines from message content, draft replies in your voice, track who owes you answers and chase them. Pidgy is this kind, for Gmail and Outlook. The inbox becomes a review instead of a job.
- Enterprise copilots. Bundled AI inside Microsoft 365 or Google Workspace: summaries, drafts, meeting notes across the suite. Broad and shallow by design; strongest when your organization already lives in the suite.
What each actually costs to adopt
Compose helpers cost nothing to adopt and change little. Triage tools cost a few days of correcting the sort. Inbox agents cost the most trust up front (they read everything, so run the security checklist first) and return the most hours: against the McKinsey average of 2.6 daily email hours, users who delegate reading, sorting, and first drafts typically keep 15 to 30 minutes of review. Copilots cost whatever your suite negotiation says they cost.
A two-question buying test
First: after a week of use, is your inbox time a short review, or is it the same job with nicer buttons? Tools that only decorate the feed fail this. Second: does anything ever send without your explicit click? The correct answer is no; drafting and chasing should queue for approval, with you as the sender of record on everything.
The deeper split, whichever kind you choose, is the one that doesn't change: machines take the reading work, humans keep the judgment. What to delegate and what to keep draws that line in detail, and how triage decides shows the sorting layer from the inside.
