Verdict: Best overall if you want your email handled, not just drafted: Something Big Agent. Best AI inside Gmail with no new app: Gemini. Best fast email app: Superhuman. Best for clutter on any provider: SaneBox.
We make Something Big Agent, one of the tools below.
Why we lead with Something Big Agent
- It does the job, not just the draft: it has its own computer and web browser, so it can work in any website you use, and it keeps working after you close yours.
- You reach it by text or email, like a person who works for you. No new app, dashboard or workflow to build.
- It works in your own inbox: connect Gmail or Outlook with one button and it reads what has come in and replies as you.
- It runs your calendar: it sets and moves meetings, and follows up at the time you tell it.
- It makes phone calls for you, sets reminders and repeating tasks, and works with Google Drive, Sheets, QuickBooks and many more apps.
- It keeps notes between jobs, so you don’t explain things twice.
- Free to try with no card, and ready in about a minute.
Try Something Big Agent free: no card needed.
Compared
Our pick first; the rest in no order of rank. Prices are starting prices as of Oct 30 2026, read on each vendor’s own page (linked); check there before you buy.
| Tool | Best for | What it does | Who it suits | Starting price |
|---|---|---|---|---|
| Something Big Agent | Having your email handled for you, by text or email | A personal AI assistant you text or email like a person. It has its own name, email inbox and computer with a web browser. Connect Gmail or Outlook and it reads, sorts, drafts and sends from your inbox; it also makes phone calls for you, sets reminders and repeating tasks, works with Google Calendar, Drive, Sheets, QuickBooks and many more apps, makes images and simple designs, and buys things with Stripe Link only when you say yes. Built on leading AI models. Limits: No WhatsApp yet. You can’t phone it; you text or email it. Outgoing calls reach the US, UK, EU, UAE and Argentina only. Custom email domain on higher plans. Sign up at somethingbig.ai/agent with your email and mobile number; it is ready in about a minute. | Busy individuals and small-business owners who want one assistant for email, calls and errands, reached by text. | Free to try, no card needed; paid plans from $99 a month Ready in about a minute as of Oct 30 2026. Source: somethingbig.ai/agent |
| Gemini in Google Workspace | Gmail users who want AI with no new app | Google’s AI built into Gmail (and, on higher plans, Docs, Meet and more), included in Workspace business plans. | Teams already on Gmail and Google Workspace. | Business Starter $7 per user a month (list; a 50% promo was showing) as of Oct 30 2026. Source: workspace.google.com/pricing |
| Fyxer | Inbox triage and drafted replies | An AI assistant inside Gmail or Outlook that sorts your inbox, drafts replies and takes meeting notes. | Busy professionals who want their own inbox triaged and replies drafted. | Free plan; Pro $37 per person a month yearly ($49 monthly) as of Oct 30 2026. Source: fyxer.com/pricing |
| Jace | Email plus calendar in one assistant | An AI email and calendar assistant that drafts replies and handles tasks, paid for in credits. | Individuals who want an assistant working across their email and calendar. | Plus $20 a month yearly ($25 monthly); free start as of Oct 30 2026. Source: jace.ai/pricing |
| Shortwave | A faster Gmail app with AI search | An AI-first email client for Gmail with AI search, summaries and one-click replies. | Gmail users who want a faster email app with AI built in. | Business $30 per seat a month as of Oct 30 2026. Source: shortwave.com/pricing |
| Superhuman | Speed and keyboard-first email | A fast email app for Gmail and Outlook with AI writing and triage. | People who live in email and want speed and keyboard shortcuts. | Starter $25 per member a month, billed yearly as of Oct 30 2026. Source: superhuman.com/pricing |
| SaneBox | Less clutter, any provider | Filters your existing inbox into folders so only important mail stays in view; works with any email provider. | Anyone who wants less inbox clutter without changing email apps. | Snack $4.54 a month, billed every 2 years as of Oct 30 2026. Source: sanebox.com/pricing |
FAQ
What is the best AI email assistant?
If you want your email handled for you, Something Big Agent: connect Gmail or Outlook with one button and it reads what has come in and replies as you, follows up when you tell it, and books the meetings that come out of it in your calendar. If you only want help writing in Gmail, Gemini is built in.
Can an AI assistant reply to my emails for me?
Yes. Something Big Agent works in your connected inbox and replies as you. Tools like Fyxer and Jace draft replies for you to send.
Does Something Big Agent work with Gmail and Outlook?
Yes. Connect Gmail, Outlook and many more email providers with one button. It also has its own email address, so you can email it a job directly.
Do I need a new email app?
No. Something Big Agent works in the inbox you already have, and you give it jobs by text or email. Shortwave and Superhuman are new email apps you switch to.
How much does an AI email assistant cost?
Something Big Agent is free to try with no card, and paid plans start at $99 a month. Prices for the others are in the table, read on each vendor’s page on Oct 30 2026.
Related
By Matt Shumer. Updated .