# AI email writers

> Every tool here writes email for you. Where it writes is what separates them. Superhuman Mail and Shortwave replace your inbox with one built around AI, and both learn how you write so the drafts sound like you. Gemini in Gmail and Copilot in Outlook ship inside the Google Workspace or Microsoft 365 plan your company may already pay for. Grammarly and MailMaestro plug into the inbox you have and draft, rewrite or polish on demand. Lavender and Instantly are for sales: Lavender scores and fixes each cold email before you send it, Instantly writes and sends whole campaigns. Grammarly, Shortwave and Lavender have free plans.

8 tools, in the order they appear in the Digidle Tools directory. This is not a ranking.

- Page: https://digidle.com/best/ai-email-writers/
- All best-of lists: https://digidle.com/best/

## Tools

- [Superhuman Mail](https://digidle.com/tools/superhuman-mail/): AI-first email client for Gmail and Outlook accounts. Auto Drafts writes replies, follow-ups and scheduling emails in your voice before you open the thread, using context from your inbox, calendar and the web; Write with AI matches your tone, Instant Reply and Auto Summarize clear threads fast, and Write with Voice drafts from speech on mobile. HubSpot, Salesforce and Pipedrive data shows next to each thread. Mail comes in the Superhuman suite with Grammarly, Docs and Go: Business $33 per member a month billed annually ($40 monthly). Official site: https://superhuman.com/mail. Alternatives: https://digidle.com/alternatives/superhuman-mail/.
- [Grammarly](https://digidle.com/tools/grammarly/): AI writing assistant, now part of Superhuman, that corrects, rewrites and drafts text in your email and the other apps you write in: tone adjustment, unlimited rewrites, AI detection, plagiarism checks and a brand tone, in 20+ languages. Pro adds an Email Assistant that drafts replies and follows up for you. Free with 100 AI prompts a month; Pro $12 per member a month billed annually ($15 monthly) with 2,000 prompts. Official site: https://www.grammarly.com. Alternatives: https://digidle.com/alternatives/grammarly/.
- [MailMaestro](https://digidle.com/tools/mailmaestro/): AI email assistant for Outlook and Gmail from Maestro Labs. Write a short instruction and get three drafts in the tone, length and language you pick, in 20+ languages; it also summarizes threads and attachments, and runs AI agents that label your email, draft replies and follow up. SOC 2 Type II, HIPAA with a BAA on request. Free trial with no card; $12 per seat a month for email, $25 with TeamsMaestro meeting notes. Official site: https://www.maestrolabs.com. Alternatives: https://digidle.com/alternatives/mailmaestro/.
- [Shortwave](https://digidle.com/tools/shortwave/): AI email client for Gmail and Google Workspace with an assistant that searches, organizes and writes. It learns your writing style from sent mail for personalized replies, and adds instant AI replies, predictive autocomplete, AI search, AI filters and MCP integrations. Free with basic AI, 90 days of history and a 'Sent with Shortwave' signature; Pro $18 per seat a month, Business $30, Premier $45, Max $120, billed monthly. Official site: https://www.shortwave.com. Alternatives: https://digidle.com/alternatives/shortwave/.
- [Lavender](https://digidle.com/tools/lavender/): AI sales email coach for Gmail and Outlook: scores each email against what gets replies, writes first drafts and adds context on the recipient. Pro connects Outreach, Salesloft, HubSpot, Apollo and Groove. Free Basic plan with 5 email analyses a month; Starter $29 a month or $319 a year, Pro $49 or $539, Teams from $8,500. Free for job seekers and students. Official site: https://www.lavender.ai. Alternatives: https://digidle.com/alternatives/lavender/.
- [Gemini in Gmail](https://digidle.com/tools/gemini-gmail/): Google's AI assistant inside Gmail for Google Workspace: finds, summarizes and writes emails faster. It comes with every Workspace plan, starting at Business Starter. Business Starter $7 per user a month, $3.50 for new customers' first 12 months on up to 20 users; Business Standard adds Gemini in Docs, Sheets, Meet and Drive. 14-day free trial. Official site: https://workspace.google.com/products/gmail/. Alternatives: https://digidle.com/alternatives/gemini-gmail/.
- [Copilot in Outlook](https://digidle.com/tools/copilot-outlook/): Microsoft's AI in Outlook drafts emails and summarizes long threads. Copilot Chat, including Copilot in Outlook, comes with eligible Microsoft 365 plans at no extra cost; paid Microsoft 365 Copilot extends it across Word, Excel, PowerPoint and Teams, with a one-month free trial. Copilot Business add-on $18 per user a month paid yearly (was $21); Microsoft 365 Business Standard with Copilot $23.50. Official site: https://www.microsoft.com/en-us/microsoft-365-copilot. Alternatives: https://digidle.com/alternatives/copilot-outlook/.
- [Instantly](https://digidle.com/tools/instantly/): Cold email platform with an AI Email Writer agent: draft outreach with AI across five major LLMs or your own key, then send it from unlimited connected email accounts with unlimited warmup. Outreach Growth $47 a month for 5,000 emails; Credits, which include the AI Email Writer, from $47 a month; the Starter bundle of both $94, Scale $194 with the AI Reply Agent. Official site: https://instantly.ai. Alternatives: https://digidle.com/alternatives/instantly/.

## At a glance

| Tool | What it is | Where it writes | Free to start | Paid from | Extras |
| --- | --- | --- | --- | --- | --- |
| [Superhuman Mail](https://digidle.com/tools/superhuman-mail/) | AI-first email client that drafts replies in your voice before you open them. | Superhuman's desktop and mobile apps, on Gmail and Outlook accounts. | The free suite plan has Grammarly and Go, not Mail. | Business $33/member/mo billed annually ($40 monthly), Mail included. | Auto Drafts, Instant Reply, Auto Summarize, Write with Voice, HubSpot, Salesforce and Pipedrive views. |
| [Grammarly](https://digidle.com/tools/grammarly/) | Writing assistant that fixes, rewrites and drafts wherever you type. | Extension and apps, in your email and most other apps. | Corrections plus 100 AI prompts a month. | Pro $12/member/mo billed annually ($15 monthly), 2,000 prompts. | Unlimited rewrites, tone adjustment, AI detection, plagiarism check, a brand tone. |
| [MailMaestro](https://digidle.com/tools/mailmaestro/) | AI assistant that gives you three drafts per prompt and summarizes threads. | Outlook sidebar and Gmail extension. | Free trial, no credit card. | Email $12/seat/mo. With TeamsMaestro meeting notes, $25. | 20+ languages, AI agents that label, draft and follow up. SOC 2 Type II, HIPAA with a BAA. |
| [Shortwave](https://digidle.com/tools/shortwave/) | AI email client with an assistant that searches, sorts and writes. | Shortwave's client, on Gmail and Google Workspace accounts. | Basic AI, 90 days of history, a Shortwave signature. | Pro $18/seat/mo. Business $30. Premier $45. Max $120. Billed monthly. | Replies in your writing style, AI autocomplete, AI filters, MCP integrations. |
| [Lavender](https://digidle.com/tools/lavender/) | Sales email coach: scores each email, then helps fix it for replies. | Gmail and Outlook. Outreach, Salesloft, HubSpot, Apollo, Groove on Pro. | 5 email analyses and 5 personalizations a month. | Starter $29/mo or $319/yr. Pro $49/mo or $539/yr. Teams from $8,500. | Recipient context, mobile editor, Lavender Anywhere. Free for job seekers and students. |
| [Gemini in Gmail](https://digidle.com/tools/gemini-gmail/) | Google's AI in Gmail: finds, summarizes and writes email. | Gmail, in every Google Workspace plan. | 14-day Workspace trial. | Business Starter $7/user/mo. New customers pay $3.50 for 12 months, up to 20 users. | Standard adds Gemini across Docs, Meet and the rest of Workspace. |
| [Copilot in Outlook](https://digidle.com/tools/copilot-outlook/) | Microsoft's AI in Outlook: drafts email and summarizes long threads. | Outlook, in Microsoft 365. | Copilot Chat, with Copilot in Outlook, comes with eligible Microsoft 365 plans. | Copilot Business add-on $18/user/mo paid yearly (was $21). Business Standard with Copilot $23.50. | Paid Copilot extends AI across Word, Excel, PowerPoint and Teams. One-month trial. |
| [Instantly](https://digidle.com/tools/instantly/) | Cold email platform: AI writes the emails, then sends and warms up your accounts. | Instantly's web app, sending from unlimited connected mailboxes. | Starts without a credit card. | Outreach Growth $47/mo for 5,000 emails. AI Email Writer with Credits from $47/mo. Starter bundle $94. | Unlimited email accounts and warmup, your own LLM key, AI Reply Agent on Scale ($194/mo). |

Checked 2026-11-03 on vendor pages: [Superhuman plans](https://superhuman.com/plans), [Superhuman Auto Drafts](https://help.superhuman.com/hc/en-us/articles/46005658551053-Auto-Reminders-Auto-Drafts), [Grammarly plans](https://www.grammarly.com/plans), [Maestro Labs pricing](https://www.maestrolabs.com/pricing), [Shortwave pricing](https://www.shortwave.com/pricing/), [Lavender pricing](https://lavender.ai/blog/7925182-pricing), [Google Workspace pricing](https://workspace.google.com/pricing), [Microsoft 365 Copilot pricing](https://www.microsoft.com/en-us/microsoft-365-copilot/pricing), [Instantly pricing](https://instantly.ai/pricing).

## Pick it if

- [Superhuman Mail](https://digidle.com/tools/superhuman-mail/): You live in your inbox and want every reply already drafted when you open it.
- [Grammarly](https://digidle.com/tools/grammarly/): You want sharper email without switching inboxes, and the same help everywhere else you write.
- [MailMaestro](https://digidle.com/tools/mailmaestro/): Your company runs on Outlook and you want drafts and thread summaries in the sidebar.
- [Shortwave](https://digidle.com/tools/shortwave/): You're on Gmail and want an assistant that searches years of mail and answers from it.
- [Lavender](https://digidle.com/tools/lavender/): You write cold sales emails one at a time and want each one scored before you hit send.
- [Gemini in Gmail](https://digidle.com/tools/gemini-gmail/): Your team is on Google Workspace and wants AI in Gmail without adding a tool.
- [Copilot in Outlook](https://digidle.com/tools/copilot-outlook/): You already pay for Microsoft 365 and want drafting and summaries inside Outlook.
- [Instantly](https://digidle.com/tools/instantly/): You send cold email at volume and want writing, sending and warmup in one place.

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Source: Digidle Tools (https://digidle.com/). Full index: https://digidle.com/llms.txt