Email apps & inbox AI

What is the best AI email assistant for Gmail and Outlook? Fyxer, Jace and Superhuman all work with Gmail and Outlook, but they take different routes: Fyxer and Jace work inside your existing inbox, while Superhuman replaces your email app with its own.

Fyxer sorts and labels email, drafts replies in your tone, records video meetings and tracks follow-ups. It scores 4.0 on Trustpilot from 744 reviews, where reviewers often mention quick support. Its maker is UK-based, states SOC 2 Type II and ISO 27001, and offers UK data residency on the Enterprise plan.

Jace labels mail, drafts replies in your style and answers questions about your inbox, with chat over one year of email history on Plus and three years on Pro. Trustpilot reviewers rate it 4.2 from 74 reviews and repeatedly say the drafts sound like them, although the move to credit-based billing in 2026 drew a run of one- and two-star reviews.

Superhuman is a keyboard-driven email app for Mac, Windows, the web, iPhone and Android. It scores 4.8 on Product Hunt from 91 reviews, 4.8 on Capterra from 23 and 4.5 on the UK App Store from 346 ratings, but 2.0 on Trustpilot from 13, where reviewers describe trouble cancelling and unexpected charges.

Is there a free AI email assistant? Fyxer is the only one of the three with a free plan, and it leaves out the two features most people want: inbox sorting and drafted replies.

Fyxer's free plan gives 400 credits a month, a daily dashboard briefing, a weekly email briefing, a follow-up list and about 20 AI chat messages a month. Jace has no free plan but offers a 7-day trial on Plus and Pro and a 30-day money-back guarantee. Superhuman has no free Mail plan, and the Grammarly suite's Free and Pro plans don't include Superhuman Mail.

Superhuman alternatives: which is cheaper? Jace Plus is the cheapest paid option at $20 a month on yearly billing, against $25 for Superhuman Mail Starter and $37 for Fyxer Pro.

On monthly billing the order holds: - Jace Plus: $25 a month, or $20 billed yearly, with 10,000 credits and up to 2 inboxes - Superhuman Mail Starter: $30 a month per member, or $25 billed yearly, with Split Inbox, AI triage, reminders and read statuses - Fyxer Pro: $49 a month per person, or $37 billed yearly, with drafted replies, sorting and meeting recording - Superhuman Business: $40 a month per member, or $33 billed yearly, adding Auto Drafts, Ask AI and Grammarly, Docs and Go - Jace Pro: $50 a month, or $40 billed yearly, with up to 8 inboxes - Fyxer Team: $99 a month per person, or $64 billed yearly, with several inboxes at once and shared Spaces

All three price in US dollars. Superhuman says its fees exclude taxes such as VAT, so UK buyers pay VAT on top, while Fyxer and Jace don't mention VAT on their pricing pages.

Will an AI email assistant send emails without asking? Not by default: Fyxer never sends anything itself, and Jace never sends without approval unless you switch on auto-send.

Every Fyxer reply arrives as a draft for you to check, and Trustpilot reviewers mention one side effect: drafts building up in the drafts folder. Jace's auto-send is opt-in only. Superhuman's Auto Drafts feature, on the Business plan, writes drafts in your voice for you to review.

How do you pay less for an AI email app? Yearly billing saves the most: 25% on Fyxer Pro, 35% on Fyxer Team, 20% on Jace and about 17% on Superhuman.

Superhuman Business costs $33 a month on yearly billing and includes Grammarly, Docs and the Go assistant, so anyone already paying for Grammarly may find the bundle cheaper than two bills. Fyxer gives viewer seats free and offers volume quotes from 10 members. Credits are the cost to watch with Fyxer and Jace: Fyxer Pro includes 3,000 credits a month and sorting pauses first when they run out, and Jace doesn't publish how many credits a draft or chat request uses.

Refund terms also differ. Fyxer refunds in full within 7 days of a first monthly charge or 30 days of a first annual one, and Jace offers a 30-day money-back guarantee.