The best AI email assistant for you depends on what you actually need automated: a full inbox assistant like DraftKite or Fyxer auto-labels mail and writes drafts you approve; your provider's built-in AI (Gmail's or Outlook's own suggestions) gives short one-line replies with no setup; and a general chat AI like ChatGPT or Gemini can draft a good reply once you paste in the context, but never touches your inbox on its own.
The three categories, in plain terms
It's easy to lump all "AI email" tools together, but they solve different problems. Before comparing prices or feature lists, it helps to know which category you're actually choosing between.
- Full inbox assistants (DraftKite, Fyxer): connect to your inbox, classify incoming mail automatically, and write full draft replies in your tone — a genuinely different workflow, not a feature bolted onto the one you already have.
- Built-in provider AI (Gmail's smart reply, Outlook Copilot-style suggestions): included with your mailbox, no separate setup, but limited to short suggested phrases you still have to expand yourself.
- General chat AI (ChatGPT, Gemini, used manually): flexible and often excellent at the actual writing, but it has no connection to your inbox — you copy the email in, write a prompt, copy the answer back out, every single time.
Feature comparison
| Connects to inbox | Auto-labels mail | Drafts you approve | Works with | Starting price | |
|---|---|---|---|---|---|
| DraftKite | Yes | Yes | Yes — never auto-sends | Gmail & Outlook/Microsoft 365 | From $19/month |
| Fyxer | Yes | Yes | Yes | Gmail & Outlook | ≈ 600 kr/month |
| Built-in provider AI | Yes (native) | Limited or none | One-line suggestions, not full drafts | Whichever inbox you're already in | Included with your mailbox plan |
| General chat AI (manual) | No — copy/paste only | No | You write and send yourself | Any inbox, manually | Separate subscription |
Where DraftKite and Fyxer differ
DraftKite and Fyxer are the closest comparison, since both are full inbox assistants that auto-label and auto-draft on Gmail and Outlook. The clearest difference for most teams is price: DraftKite starts at $19/month, while Fyxer is priced around 600 kr/month. Beyond price, it's worth comparing what's actually included at the plan level you'd use — number of connected inboxes, knowledge base support, and whether pricing is per seat or flat — since scope varies between tiers on both sides.
Why built-in AI isn't a full replacement
Gmail and Outlook's own AI features are genuinely useful for quick one-line replies — "Sounds good, thanks" — but they stop there. They don't classify your whole inbox into categories, they don't learn your longer-form tone from past sent mail, and they don't pull facts from a knowledge base before answering a detailed question. For a handful of emails a day that's often enough; for an inbox that needs sorting and substantive replies, it isn't.
Why a general chat AI isn't an inbox assistant
ChatGPT or Gemini can write an excellent reply — often as good as any dedicated tool — once you've pasted in the original email and the context it needs. What it can't do on its own is watch your inbox, decide which of 50 new messages need a reply, sort the rest into categories, or remember your knowledge base from one email to the next without you re-providing it. It's a writing tool you drive manually, not an inbox automation.
None of the assistants worth using should send email on your behalf without you approving it first. If a tool advertises fully automatic sending as a feature, treat that as a red flag, not a convenience.
DraftKite fits the "full inbox assistant" category: it connects to Gmail and Outlook/Microsoft 365, auto-labels incoming mail, and drafts replies in your tone for you to approve — never sending automatically. It's EU-hosted and built around GDPR requirements. Start the 7-day free trial, no card required, and compare it against your current workflow directly.