5 Best AI Email Assistants for Gmail in 2026 (Compared)

The Chrome Web Store has no shortage of "AI email assistant" listings. Most solve a narrower problem than the name suggests. Here's how five of them actually compare on features and pricing — not popularity, not review counts, just what each one does and what it costs.

Methodology: every feature and price below comes from the tool's own live listing or product page, checked directly. If a detail wasn't publicly confirmed (like an exact price tier), we've said so instead of guessing.

1. AI.Reply — best for one-click replies with zero prompting

AI.Reply puts intent buttons directly inside Gmail: Accept, Decline, Formal, and Instant AI. Click one, and it reads the full thread — not just the last message — to draft a complete reply in your tone. No prompt box, no describing what you want first.

• Key features: One-click reply (Instant AI), Guided AI (five-word hint → full reply), Accept & Decline intents, Formal mode, Forward assistant with auto-context, Compose assistant, thread summarization, reusable templates with custom sign-offs
• Platform: Gmail only
• Pricing: 30-day free trial (50 replies/day), then ₹199/month or ₹1,499/year
• Best for: anyone who wants routine replies handled in one click instead of writing a prompt first — recruiters, sales, support, founders, managers

Install AI.Reply free — takes 30 seconds, no account needed.

2. WriteMail.ai — best for multilingual teams

Generates full emails from a short description, writes context-aware replies, and adjusts tone on request. Supports writing in 30+ languages, which none of the other tools here advertise.

• Key features: Generate emails from a brief description, context-aware replies, tone adjustment, 30+ language support
• Platform: Gmail (Chrome extension)
• Pricing: Free tier covers core generation and replies; paid plans exist for higher volume (exact tier pricing not published on the listing)
• Best for: teams that write to non-English-speaking contacts regularly

3. superReply — best for fast tone-matched responses

A lighter-weight extension focused specifically on generating a response and letting you pick the tone before sending.

• Key features: AI-generated email responses, tone matching, Gmail integration
• Platform: Gmail
• Pricing: Free to install; offers in-app purchases for extended usage (exact pricing not published on the listing)
• Best for: users who want a simple reply generator without extra features to configure

4. Compose AI — best for writing beyond just email

Compose AI's core feature is autocomplete — it suggests the rest of your sentence as you type, not just full-reply generation. It also works outside Gmail, in Google Docs and other web text fields.

• Key features: Inline autocomplete (accept with Tab), one-click professional replies referencing the original email, rephrase/shorten/expand/change-tone on selected text
• Platform: Gmail, Google Docs, and general web text fields
• Pricing: Free to install; premium tier available (exact pricing not published on the listing)
• Best for: people who want AI writing help across more than just their inbox

5. Ellie — best for teams that want auto-drafted replies and custom roles

Ellie trains on your own sent emails to match your writing style, and lets you define custom roles (like "Customer Support" or "Sales") with their own instructions. It can also ingest documents or websites as a knowledge base for context-heavy replies.

• Key features: Learns your writing style from sent mail, custom roles with tailored instructions, can reference uploaded files or websites, auto-draft to your Drafts folder on paid tiers
• Platform: Gmail, Outlook, and Fastmail
• Pricing: 7-day free trial, then tiered paid plans (Casual, Business, Professional); team seats start at $5/user (individual tier pricing not published on the site)
• Best for: support or sales teams that want replies pre-drafted and waiting, not generated on demand

How to actually choose

Feature lists look similar across all five. The real differences show up in daily use — read our breakdown of what separates a tool that sticks from one you'll uninstall in a week. And if the real bottleneck is your process rather than the tool, this 5-step system is worth reading first.

If your inbox is mostly Gmail and you want replies handled in one click without describing what you want first, install AI.Reply free and try it on your next email.