The 10 best AI email assistants in 2026

Email is a digital hydra. For each one you bat out of your inbox, two others take its place. You finally pass the info on to your co-worker, only to drown in a jet of newsletters. Wouldn't it be great if AI could be your personal email Hercules?

The competition for the best AI email assistant software is in full swing. You'll find powerful options that'll help you write emails, improve communication, sort through conversations, or burn a stack of junk mail in a flash. This is a lot more compared with the first-wave AI email apps that just integrated with OpenAI for writing drafts and called it a day.

I've been updating this list for a few years now, and this time around, I spent two weeks researching and testing the best AI email assistants, and I've put together a shortlist for you to try out. And in case you'd like to build your own AI-powered email workflows, I've included a quick breakdown of how this technology can help you do just that.

The best AI email assistants

• Shortwave for AI-powered email search

• Microsoft Copilot Pro for Outlook for improving communication

• Gemini for Gmail for Google Workspace users

• Apple Intelligence for Apple Mail for Apple customers

• Superhuman Mail for mixing AI generation with message templates

• Canary Mail for multiple devices and email providers

• Extra for AI-powered email filtering

• Cora for summarizing your inbox

• Proton Scribe for privacy

• Edison Mail for AI-powered security

What can AI bring to email?

Since I wrote this article for the first time, a lot has changed in AI email. Model intelligence steadily increased, and software tools to interface with them became more stable and powerful, making apps more reliable over time.

AI still isn't ready to work unsupervised—and that's not the point here, anyway—but it's a great tool to shave minutes off of every message through organization, insights, writing assistance, and automation.

Here are areas where AI can help you do email better. What you're about to read includes some features already present in apps on this list, although some more advanced capabilities only exist in enterprise-grade solutions or custom-built integrations not covered here.

Processing email content

LLMs have a deep understanding of human language, analyzing the content of every email from any angle you need. Depending on the prompt you attach to the email message you want to analyze, you can:

• Run sentiment and intent analysis on the message, providing an overview of how the sender is feeling and how they might want to proceed based on their language. This is useful to understand if you need to be more tactful with your reply or can move the conversation forward with confidence.

• Generate a set of tags to sort incoming emails: AI processes the message, assigns a tag, and your inbox groups all the messages with the same tag in a filter or view. This helps you batch replies by topic, reducing context switching.

• Summarize the email or entire email thread, so you don't have to read through 15 replies to understand what's going on. Get the clean gist of the matter in a single paragraph.

• Optimize your inbox usage by having AI analyze your usage and messaging partners, unlocking things like identification of unanswered high-priority emails, spotting frequent senders and recurring topics, or suggesting inbox cleanup or filtering rules.

• Get coaching on your email draft by getting feedback on how you might be perceived, including structure, tone, and word usage.

• Detect data types, extract actions or tasks after detecting them in email content (such as deadlines or next steps), and convert them into calendar events or tasks.

Business intelligence and enrichment

One step above basic processing, AI can use pattern recognition and data integrations to use your inbox as a starting point to look for and surface relevant information.

For example, after extracting all the data from an email thread about a project, you can use AI-enabled systems to gather all the related tasks, all documents, and the contact information of people involved in moving it forward.

This is especially useful if you're a project manager or team leader, as you can get updates and compare project status over time to understand how it's unfolding in near-real-time, and then nudge it forward with a short message.

In sales, enrichment is already popular, using a combination of searching lead databases and AI-powered online research. This can build a holistic view of a person and their company, helping you build a more personalized sales process, driving up closed deals.

Automatic replies, writing, and rewriting

Some replies are pretty straightforward; why are you wasting brain power and keystrokes on writing a short acknowledgement? Most AI email assistants offer generative AI features for writing a reply from scratch based on a prompt, turning your "say yes and set the meet for 5" into a fleshed-out message.

At the same time, you can start using the email draft writing page as a place to dump ideas so AI can turn them into something articulate and professional, ready to send. This can make the experience much more intuitive for you while still offering full context for your recipients, especially if you don't like or have time for writing.

Generative AI also enables multi-language support, making it easy to translate your messages. When you're managing a multinational operation, it's possible to blast the original email in English and include translations for everyone.

Automatic replies aren't the norm in the category yet. Good replies require context, meaning your inbox needs to be connected to your data sources. One of the trends of AI this year is the rise of MCP (Model Context Protocol, a connector standard for data and AI models), which brings easier connectivity between apps. With Zapier, for example, you can connect your AI assistant to your email app—and the rest of your tech stack—and manage your inbox, context included, straight from your chat window.

Multimodality

AI enables multimodality: using voice to manipulate text, text to generate voice, voice to create an image, and so on. You can interact with your inbox by talking and listening, not just reading and typing: an agent can read your important emails to you, and you either dictate or speak out instructions to reply to your emails.

What makes the best AI email assistant software?

Based on all the possibilities that this technology brings to the table, generative AI isn't enough. The best AI email assistant software needs to go a bit beyond that. Here's what I looked for as I was testing all the apps that claimed to be AI email clients. 

• Easy email integration. The integration process should be easy and fast with the most popular email services.

• Inbox management. I prioritized individual inbox management apps. For now, I'm leaving out apps that are focused on sales and outreach or customer service—I'm showing you how AI can transform your personal inbox, whether at home or at work.

• AI features. I was looking for AI features beyond generative text—for example, things like sentiment analysis, intent detection, automatic labeling, or data extraction.

• Productivity and automation. AI is one tool out of many, so these apps should offer other features and settings to help you save time and get to inbox zero faster.

• Data privacy. Your emails are private, so adding an app like this to your collection shouldn't represent a security risk. I read the privacy policy of each app to understand how secure your data will be.

For two weeks, I dug the internet for all the AI email assistants that I could find. I filtered out those that just integrated generative AI into the compose window and was left with a smaller selection. I signed up for each of them, configured the platform until it was ready to use, and sent a few emails back and forth between my email accounts. I played with the settings, observed how well the AI did what I wanted it to, and from there, picked these apps.

The best AI email assistants at a glance

Best AI email assistant for searching email history

Shortwave (Web, Android, iOS, Windows, macOS)

Shortwave pros:

• Deep integration with Google Calendar

• AI assistant is very flexible

Shortwave cons:

• Interface feels cluttered at times

Sitting confidently on the throne here, Shortwave has the widest range of AI features of all the apps on this list. They all live in the top-right of your screen: click on the magic stars icon there, and a chat window appears docked on the right side. This is the Shortwave AI Assistant.

The most unique possibility it offers is AI-powered email search. You can ask questions to your inbox to surface old, forgotten conversations without actually having to get lost in the mess. More than this, it can extract data from email threads ("make a list of all the tasks in the website redesign project"), generate content ("write a tweet based on my emails about productivity"), or answer your questions ChatGPT-style.

Email and calendars usually go hand in hand. In Shortwave, you can schedule meetings or new events in natural language, with something as simple as "schedule a meeting for me and John in 2 days at 6pm." I used this exact prompt, and the meeting appeared on my calendar. I didn't have to do anything else. And if you don't know your availability, just ask, and you'll get a breakdown of your open slots for the near future.

The AI features used to be spread out across the interface, marked by the magic stars icon, but that's changing. Most of the actions now run on the dedicated chat window on the left side of the screen, where you can get tips for organizing your inbox, get email thread summaries, and interact with external connected apps. The biggest native integrations include Notion, HubSpot, and Asana.

And then, on the right side of where you write your replies, you can generate a message from scratch or based on a prompt. This takes the action back to the sidebar, but you can easily add the AI output to a new reply and keep the conversation flowing.

A bit of disappointing news: Shortwave only works with Gmail accounts for the time being, so if you're doing email with other providers, you'll have to sit out. There's an Outlook waiting list; sign up if you're interested so you get notified when it finally comes out.

Shortwave price: Free plan available; paid plans from $18/user/month

Best AI email assistant for improving communication

Microsoft Copilot Pro for Outlook (Windows, Mac, Android, iOS)

Copilot Pro for Outlook pros:

• Tends to get the newest OpenAI models quickly

• Also unlocks AI features in your other Office apps

Copilot Pro for Outlook cons:

• No integration with non-Microsoft email inboxes

Microsoft's AI expansion continues with the release of Copilot Pro. Outlook is one of the apps that gets a boost, with three shiny AI features that, while not groundbreaking, are really well-implemented and easy to use. And, since we're talking about a tech giant, this list could expand quickly.

The first one is straightforward: you can write emails from scratch using AI. When writing a new email, look to the right half of the toolbar, click on the Copilot icon, and select Draft with Copilot. That will open the settings, where you can type your prompt, set the tone and length, and then start generating.

The second one is thread summarization: like others on this list, you can get a big-picture view of a conversation in a list of topics. Unlike others on this list, Copilot adds little numbers in superscript that you can use to jump to the message where that topic is discussed. Super helpful for searching your conversations for specific statements.

But the last one really surprised me. Called Coaching by Copilot, you can have your email message analyzed to see how the tone, content, and structure of the email will impact the receiver. I wrote a general project kickoff email to test this, and it told me I could be more enthusiastic, show appreciation for the reader's contribution, and break down the topics for higher clarity. This comes with a few example sentences, so you know how to take the first steps. A well-written email can save you a lot of headaches along the way, so I find this very helpful to manage projects, provide updates, and make communication more effective.

Outlook wraps it up with a nice touch: if you generate an email with AI and click to send right away, it'll show a pop-up reminding you that AI may be inaccurate, inviting you to revisit the content before pushing it out.

And, of course, this isn't the only place where you'll be getting AI. You'll also get Copilot features to help write documents in Word, generate presentations in PowerPoint, and analyze data in Excel. Plus, you can integrate Microsoft Outlook with Zapier to connect it to all the other apps you use at work. That means creating AI-powered workflows that can automatically draft emails and send information from your inbox to all the other apps you use at work—automatically, or straight from your AI chat window. Learn more about how to automate Outlook.

Important: Copilot only works with email addresses ending in Microsoft-related domains, such as @outlook.com, @live.com, or @hotmail.com. This may be related to privacy policy reasons. For example, I wasn't able to get it to work with a Gmail account. And while we're talking about privacy, it isn't very clear if, as a personal user, your data will be used for training or fine-tuning models. For companies, the data governance settings you have in place will apply when dealing with Microsoft's LLMs, except if you're using plug-ins or internet-connected generation.

Microsoft Copilot Pro price: Included in Microsoft 365 plans, starting at $9.99/month for individuals and $25.20/user/month for businesses.

Best AI email assistant for Google Workspace users

Gemini for Gmail (Web, iOS, Android)

Gemini for Gmail pros:

• Seamless integration with Gmail

• Plenty of starter and follow-up prompts

Gemini for Gmail cons:

• AI summaries are sometimes unreliable

Gemini is slowly spreading deep into the infrastructure of every app in Google Workspace, adding smart features to help you search, organize, and create. Gmail is included in this rollout: if you're on a paid personal plan (AI One) or a business plan (Workspace), you'll see the Gemini star at the top right of your screen.

When you click it in Gmail for the web, a side tab opens with contextual suggested actions. For example, when you open it while viewing your inbox, you can ask for a summary of your unread emails. The AI will sweep through your messages and present them there, ready for follow-up questions. You can also track orders from the same spot—it's a straightforward way of keeping tabs on your stuff without sifting through confirmations, notifications, and receipts.

When opening an email, you can summarize the contents and ask for a reply draft, from the side tab or straight from the email. Gemini will generate it and place it in the input field, ready for tweaks. And if you need extra context to reply to your emails, you can have Gemini use Google Search to look up relevant information and then improve the response. Just keep in mind that chat history isn't saved here, so if you refresh your browser, your conversation will be lost.

Gmail integrates with Zapier, so you can automate your inbox however you want. For example, you can generate a to-do list from your inbox, easily save email attachments, or send notifications from your inbox—and you can use Zapier's built-in AI at any step of the process. Learn more about how to automate Gmail.

Gemini price: From $7/user/month (billed annually) in Google Workspace

Best AI email assistant for Apple customers

Apple Mail with Apple Intelligence (iPhone, Mac, iPad)

Apple Mail pros:

• Part of a broader AI feature set for Apple devices

• AI can run locally on your device

Apple Mail cons:

• Requires a compatible Apple device

Apple Intelligence is out in the world: you can now create images on your device, generate text anywhere there's an input field, or even remove intrusive details in photos you've taken in the past. AI also extends into Mail, offering the baseline set of features to help you save some time.

First, transparency: although I own an iPhone, I'm below the hardware cutoff point, which means that my device is incompatible and can't run the AI processes. What you're about to read is a roundup of online product reviews from a combination of established sources and a few Reddit posts for unfiltered feedback. The coverage is mixed, with tech reviewers excited about the summarization and prioritization features, and users frustrated with some inaccurate decisions and a patchy overall experience.

Still, Apple Mail with Apple Intelligence packs quite a solid feature set. It auto-sorts your inbox into categories for all connected accounts, so you always have the more important messages in Primary but can dip into Promotions when you want to shop or Updates to catch up with newsletters. To save keystrokes, it has Smart Reply that learns your writing style and suggests replies to emails in your inbox, adapting to the tone you usually use with that recipient: you can just tap the suggestion to accept it and then make any edits you need to make.

And with Siri AI now in the mix, you can access all of this intelligence with your voice. But the best part about Apple AI is the A18 processor (available in iPhone 16 onwards) that can run AI workloads on your device: that's smart features with full privacy, with no data ever leaving your device, a big advantage for comms-related work.

Apple Mail price: Free with your Apple device (requires a compatible device)

Best AI email assistant for mixing AI generation and message templates

Superhuman Mail (iOS, Android, Chrome, macOS)

Superhuman Mail pros:

• Split your inbox by topics to organize messages

• Powerful keyboard shortcuts

Superhuman Mail cons:

• Not as many AI features as the other options

AI saves time when writing emails, but it might fail to produce the exact results you're looking for. This is especially true if you've crafted the perfect outreach email or the ideal company presentation paragraph. Superhuman Mail will help you balance both: the speed of AI generation and the precision of your existing messaging.

As a keyboard-driven app, you'll have to learn the shortcuts to move around quickly. This adds a bit of a learning curve at the start, but it'll feel great once you grasp the basics. Let's walk through the process of writing a new email with AI and your templates:

1. When reading an incoming email, press Enter to reply. 

2. Start by generating with AI: hit Ctrl + J, write a short prompt, and send it. 

3. Then, you can use the snippets feature to add pre-written blocks of text: click anywhere on the message, tap the ; key, and select the one you want. It'll land exactly on that part of the email.

While Superhuman comes with a few stock snippets, you'll need to add your own. Head to the Snippets screen (click the hamburger menu, and select Snippets, or hit G followed by ;), and add as many private or team snippets as you need. They can be full messages with attachments or short blocks of text detailing a product or service you offer. You can customize them with variables, so the fields update based on the message sender.

On top of this generative AI tool, you'll be able to summarize any of your email threads: hit M while reading to do so. If you need to travel back in time to find answers, you can use AI-powered search to surface information. The user interface is minimalist, offering tools to split your inbox based on email types and a way to mark your emails as done, useful for tracking what's still to do.

Because Superhuman does more than just mail, your ticket to entry also gives you access to Docs (formerly Coda), Databases (formerly Rows), and Go (formerly an independent AI agent platform for automation also called Go). Parent company Grammarly bought a bunch of apps, and they now all live under one, unified Superhuman brand.

Superhuman Mail price: From $25/user/month (billed annually)

Best AI email assistant for multiple devices and email providers

Canary Mail (macOS, Windows, iOS, Android)

Canary Mail pros:

• PGP and SecureSend for private communications

• One-time payment option available

Canary Mail cons:

• Occasional sync issues, especially if you use your inboxes from their native clients

Back when you started doing email, you had your one personal account and that was it. But as you step into more roles, the collection grows: one for your business, another for running a local community, a third for encrypted comms, and the list goes on. Bring them all together in Canary Mail, and open them in whatever device you have around, with AI to make it easier for you.

It runs on nearly every device today, accepting a wide range of providers: the common Gmail or Outlook, the trusty Yahoo, the private Proton Mail, and even the efficient Zoho Email. Once you connect your accounts, you can see them in a unified inbox, so you don't have to switch between them to get everything done.

Most of the AI features live on the Copilot tab on the right side. You can generate reply drafts, summarize, or extract tasks; when you click to show all emails, you can do the same for every message sent by the sender. When writing an email yourself, you can click the AI button to proofread, translate, or adjust formality and length.

One cool feature I really like is the bulk cleaner: when you click the magic wand icon and scroll down your inbox, Canary Mail automatically detects and selects unimportant emails, and you can then choose whether to archive or delete them. Close second is the mobile experience, where the AI chat experience is a viable way to interact with your inbox, so you can ask questions and reply to your emails on the go.

Canary Mail price: Free plan includes unified inbox for unlimited email accounts; Growth at $3/month (billed yearly) adds AI features and inbox cleaner; lifetime options available, starting at $100 one-time.

Best AI email assistant for AI-powered inbox filtering

Extra (Web, iOS, Mac)

Extra pros:

• Natural-language "talk to your inbox" interface lets you ask questions instead of searching manually

• Suggests unsubscribes based on how much you engage with a sender

Extra cons:

• Recently launched; limited email provider and device coverage

The typical inbox: every email you get sits on a list, sorted by the date you received it. Maybe you set up some auto tags, but then get lost in the complexity of the filtering rules, and some are labeled wrong. Not with Extra: built by the former designers of Pinterest, it splits your inbox into multiple lanes, with a really handy Today view to keep things under control with minimal work.

The view opens with today's date and a paragraph of the top priorities you should be keeping an eye on. These include the top messages that Extra believes are important to you: in my case, it surfaced two specific emails around project priorities and an account security review. Under this summary, you have a section on emails that need your attention; important notifications; the next events on your calendar; and it even suggested I generate a meeting agenda for a 1-on-1 I have on Friday.

When you're all caught up, you can head to the dedicated labels that Extra creates for you. Unlike regular tags that just filter your email, each label has a different view in Extra, helping you engage with the content of each message in a more productive way. For example, News grabs all the news emails and lays them out in a grid, including one image and the subject of the email. Shop does the same, but shows products inside the emails with prices and images. Packages gives you a detailed view of any orders you have coming over with a list of large horizontal cards to fit all the key information.

Based on the view, you can use the assistant on the right side (or the How can I help search bar at the bottom of your mobile app's screen) to interact with your inbox. This includes asking questions about your emails and drafting replies that you can tweak before sending. But what's surprising here is the Handle it button: this puts Extra's agent in charge of that email thread, automatically replying to messages, and then checking in with you whenever something meaningful changes or it needs your input—that's delegation with a click.

Extra price: Free for now, but pricing plans may be introduced in the future as the product evolves.

Best AI email assistant for summarizing your inbox

Cora (Web)

Cora pros:

• Learns and adapts as you use it

• Generates AI drafts in your voice

Cora cons:

• Launched recently; feature set still growing

Email is noise. If you like to do focused work, you might hang out in your inbox one or two times a day to keep it at bay. While you now have more cognitive space for important tasks, you'll open your email and find that you have loads of messages to go through. Cora helps you trim the time you need to go through them, surfacing the unmissable ones and wrapping everything else into a summarized briefing.

It currently only works with Gmail; after you connect your account, Cora reads your emails to try to understand who you are and what you do. In my case, I always use the same email account for testing software, so it accurately found out that I'm someone evaluating a lot of software solutions to select the best ones for me. After that's done, it sets up categories to help you filter your email as it arrives, based on who you are and what you care about.

Most of the action will still happen on your Gmail inbox, with Cora in the background helping you out. It can generate draft responses to received emails, placing them in the drafts folder so you can review, tweak, and send. You can always dip back into the Cora web app to use the chat assistant for setting up your filters, other account settings, or running larger email organization actions.

You'll also notice a new type of email popping up: the two daily briefs round up the email noise into a digestible roundup, one in the morning and another in the afternoon—but you can change the brief times in the settings depending on your hotter comms windows. The content of the brief is based on new emails you receive since the last brief: when you click the Next Brief label, you can see what's queued up.

Cora price: Starts at $25/month for 2 email accounts, AI inbox organization, pre-drafted responses, daily brief summaries, and technical support.

Best AI email assistant for privacy

Proton Scribe (Web)

Proton Scribe pros:

• Zero-knowledge cloud generation

• Downloadable version

Proton Scribe cons:

• No thread summarization or smart category filters

Originally brainstormed among the halls of the European Organization for Nuclear Research, Proton Mail first appeared as a privacy-oriented email service, protecting you from snooping, nuclear strikes, and government interference—that's Swiss law, everyone. Riffing on this track record, Proton Scribe is a Proton Mail writing assistant that brings AI features into the email client without compromising your data.

Every time you use an AI feature in another app, a request flies out to a server owned by OpenAI, Google, or any other provider. While the standards for data transmission are generally high, you don't really know what happens during the generation process—are they keeping your data for training? Will a human reviewer see your emails if there's an issue? Proton Scribe answers these questions in two ways:

• It offers a zero-knowledge cloud generation service. This means that every request that you send to their secure servers is deleted after it runs. No one at Proton knows what you sent over to the AI model, so they can't share it with anyone—or, worse, have it stored in a database that a hacker can try to break into.

• It offers a downloadable AI model you can use to run the inference process yourself. This means you'll have the AI running on your computer, and the Proton Mail app will be in charge of controlling it.

Regarding the actual AI features, it doesn't do a lot when compared with others on this list—not yet, at least. Built into the email composer, Scribe can write a new draft from scratch, improve an existing one, proofread what you write, or apply style and structure changes. When starting or continuing a thread, look for the pencil with the magic stars to open up the options.

If you want to go full private and use the AI model in your computer, make sure you've got hardware: the minimum requirements for Windows users are a dedicated NVIDIA or AMD GPU with at least 6GB of RAM, along with other special architecture requirements—and the rest of your computer should be reasonably powerful, too. This makes the entry-level for full privacy a bit high, especially if your company's IT strategy involves low-end laptops connected to a beefy internal corporate network for the heavier work. But is it cool hearing your laptop's fans roar as it generates a new email? You bet. Under your fingers, something is thinking.

Proton Scribe price: Included with the Proton Duo at $19.99/month; also available as a paid add-on on Proton for Business plans for the same price on a per-user basis.

Best AI email assistant for AI-powered security

Edison Mail (Windows, Android, iOS)

Edison Mail pros:

• Fast and lightweight

• Runs almost entirely on your device

Edison Mail cons:

• No support for high-encryption standards such as S/MIME or PGP

We like to think phishing happens to other people, not us. But if you're tired at the end of the day, it's easier to click a link you think is safe and open a Pandora's box of cybersecurity issues as a result. If you and your company are a high-value target for the black hats, Edison Mail can add an extra layer of protection to prevent security breaches.

Starting off, it blocks spy pixels and read receipts, displaying a green shield to let you know they were removed. It includes smart spam filtering that lets you block senders, bulk delete messages, and easily unsubscribe to newsletters. And to make sure your messages are for your eyes only, the mobile app offers Touch/Face ID to unlock your emails.

As to the advanced security features, Edison Mail keeps track of your email communication patterns, running plenty of checks to make sure you're talking to the right people, not the hackers. It performs backend checks for the sender's mail server, looking it up over 70 spam databases and historical trends. On top of that, it parses the signatures in your emails, and automatically updates caller ID on your phone to reveal the name of who's calling you, just in case you haven't added their contact yet. This makes it easier to filter out cold calls from those of people who have your consent to connect.

Beyond the security features, Edison Mail includes a wide AI feature set, so you won't have to sacrifice productivity to sleep easy at night. It comes with AI search and filtering, with smart folders that grab and organize messages for you, and generative AI for writing drafts powered by Meta's models.

Overall, Edison Mail is a solid app across the board for people who care about their security while keeping up with some AI features. It's not the most productivity-focused of the bunch, but if you have a lot to lose from a data breach, it's probably your best bet at staying safe.

Edison Mail price: Mail+ plan is $14.99/month or $99.99/year (subscription available via mobile app only).

Simplify email with Zapier

I love the inbox zero feeling. I confess I've been having it less and less, so it's time to side with the bots. Having AI in your inbox means you'll be able to be more agile with important messages, handle the lower-priority ones gracefully, and throw the rest out the window.

An AI email assistant can get you most of the way there—faster replies, smarter sorting, less time staring at the inbox. But the really powerful stuff happens when your email is connected to everything else you work in. Zapier lets you build AI-powered email workflows that tie your inbox to the apps your business already runs on. You can add AI and agentic tooling to your existing email automations, or connect your agent harness to your inbox, so your agents can securely manage your inbox, with full OAuth-managed app access.

Related reading:

• How to use ChatGPT for sales (+ ChatGPT prompt examples)

• The best AI scheduling assistants

• Shortwave vs. Superhuman: Which should you use?

• The best AI newsletters

• What is ambient AI?

This article was originally published in September 2023. The most recent update was in July 2026.