AI tools · Ranked by price to features
10 Best AI Email Assistants of 2026
By the Rankozo research desk · Updated November 9, 2026 · Next review December 24, 2026
Spark is the best AI email assistant for busy professionals in 2026, with a free plan and Plus at $8.25 per user per month billed yearly. Superhuman suits Gmail and Outlook power users from $25 per member per month billed annually, and Canary Mail is the cheapest paid option at $3 per month billed yearly.
- Tools ranked
- 10
- With free plan
- 5
- Cheapest paid plan
- Canary Mail, $3
- per user per month
By the numbers
- $20ChatGPT Plus costs $20 per month, billed monthly.OpenAI
- $17Claude Pro costs $17 per month on an annual plan ($200 billed up front) or $20 billed monthly.Anthropic
- $20A standard ChatGPT Business seat costs $20 per month billed annually or $25 billed monthly.OpenAI
- $30.00Microsoft 365 Copilot for enterprises costs $30 per user per month paid yearly as an add-on.Microsoft
- $299,071 millionGartner's November 2024 forecast put worldwide end-user spending on SaaS at $299,071 million in 2025, up 19.2% from 2024.Gartner
Comparison table
| Tool | |||||
|---|---|---|---|---|---|
| Spark Mail | 01 | 8.8 | 9.0 | $8.25per user per month | Yes |
| Superhuman | 02 | 8.5 | 7.4 | $25per member per month | No |
| Canary Mail | 03 | 8.4 | 9.4 | $3per user per month | Yes |
| MailMaestro | 04 | 8.4 | 8.8 | $12per seat per month | Yes |
| Microsoft 365 Copilot in Outlook | 05 | 8.2 | 7.8 | $18per user per month | No |
| Fyxer AI | 06 | 8.1 | 6.8 | $37per person per month | Yes |
| Shortwave | 07 | 8.0 | 7.0 | $30per seat per month | Yes |
| Gemini in Gmail | 08 | 7.9 | 7.6 | Check price | No |
| SaneBox | 09 | 7.8 | 8.4 | $4.54per month | No |
| Missive | 10 | 7.6 | 7.2 | $14per user per month | No |
Click a column to sort. Prices are the cheapest paid plan quoted from each vendor's US pricing page; "Check price" means the US price check is pending.
How this ranking works
One method for every tool. We compared documented features and published prices; we did not run hands-on tests. Value carries the most weight.
Full methodThis list is for professionals who spend hours a day in email and want AI to sort, summarize and draft for them. The two questions that decide most purchases are price per month and whether the tool works with your email provider, so every entry lists both. We compared documented features and published prices on each vendor's own pages and scored value at 40%, features at 35% and ease of use at 25%. Starting prices are the cheapest paid plan in USD per user per month, usually on annual billing. Some tools are full email apps that replace your client, some are add-ons inside Gmail or Outlook, and SaneBox works on the mail server itself.
The verdict
Spark gives the best mix of price, AI features and provider support: it connects to Gmail, Outlook, Exchange, iCloud, Yahoo and any IMAP account, and paid AI starts at $8.25. Superhuman costs three times as much but adds the fastest keyboard workflow and auto drafts on Business. MailMaestro is the value pick for people who want to stay in Outlook or Gmail, Canary Mail is the cheapest paid plan, and Microsoft Copilot fits teams already on Microsoft 365. Fyxer AI and Shortwave carry the most capable AI but cost $30 or more per seat, and Shortwave works only with Gmail and Google Workspace accounts.
- 01Top value
Spark Mail
8.8/10A cross-platform email app with a smart inbox, team features and a built-in AI assistant called Spark +AI.
Price
$8.25per user per month
Free plan; Plus from $8.25 per user per month billed yearly ($99 a year), $10 monthly; Pro $16.58 billed yearly
“Plus For individuals and small teams who use email to get things done $8.25 / month per user $120 $99 / year” Quoted from the pricing page, November 9, 2026.
- Free plan
- Yes
- Value (40%)
- 9.0
- Features (35%)
- 8.6
- Ease of use (25%)
- 8.7
Best forProfessionals with several accounts on different providers who want AI help for under $10 a month.
Spark covers more email providers than any other app here. Its homepage lists IMAP, iCloud, Exchange, Outlook, Yahoo and Google, and the free plan already includes unlimited email accounts, a smart inbox and a calendar. Plus costs $8.25 per user per month on yearly billing, or $99 a year, and $10 monthly. It adds Spark +AI, which translates, summarizes, drafts and proofreads, an AI Assistant that searches a year of history, 40 AI meeting notes a month, templates and essential team collaboration. Pro at $16.58 per user per month billed yearly extends the assistant to full email history and adds unlimited meeting notes, Autopilot rules that organize and forward mail, Auto-Drafts written in your voice, read statuses and a HubSpot integration. The catch is that the most useful automation sits on Pro. Even so, Pro costs less than the entry plan of Superhuman or Shortwave, which makes Spark the strongest value for mixed-provider inboxes.
- ✓Free plan with unlimited email accounts
- ✓Broadest provider support in this list
- ✓Plus costs $99 a year for AI and team features
- ✕Auto-Drafts and Autopilot need Pro
- ✕AI Assistant on Plus searches 1 year of history, not the full mailbox
- ✕Free plan has 5 lifetime meeting notes
- Supported providers:
- Google, Outlook, Exchange, iCloud, Yahoo, IMAP
- Free plan:
- Yes, unlimited email accounts
- Plus:
- $8.25 per user per month billed yearly, $10 monthly
- Pro:
- $16.58 per user per month billed yearly, $20 monthly
- AI meeting notes:
- 5 lifetime on Free, 40 a month on Plus, unlimited on Pro
Bottom line: Spark is our top pick: it works with almost any provider and puts AI in reach at $8.25 a month. Buy Pro if you want drafts written for you.
- 02
Superhuman
8.5/10A keyboard-first email app for Gmail and Outlook accounts with built-in AI on every plan.
Price
$25per member per month
No free plan; Starter from $25 per member per month billed annually; Business $33
“Starter $25 per member / month, billed annually” Quoted from the pricing page, November 9, 2026.
- Free plan
- No
- Value (40%)
- 7.4
- Features (35%)
- 9.2
- Ease of use (25%)
- 9.2
Best forExecutives and heavy email users on Gmail or Microsoft 365 who value speed above price.
Superhuman is built for people who answer email all day and want to do it from the keyboard. Its help center says you can manage as many Gmail or Outlook accounts as you like, work or personal, so most corporate and personal mailboxes are covered, but IMAP providers are not. Starter costs $25 per member per month on annual billing, which the vendor says is 17% off monthly, and includes Superhuman AI, team collaboration, calendar and scheduling, and unified admin and billing. Business at $33 per member per month adds the vendor's most advanced AI, auto drafts, Ask AI over your inbox, custom auto labels, CRM integrations and a Superhuman Mail MCP, with 15% off for teams of 5 or more. There is no free plan, so you pay from day one. The price is high next to Spark or MailMaestro, and the AI that saves the most time sits on Business, but the speed of the app is the reason people pay for it.
- ✓Add as many Gmail or Outlook accounts as you like
- ✓Polished keyboard workflow for fast triage
- ✓Team collaboration on the Starter plan
- ✕No free plan
- ✕Auto drafts and Ask AI need Business at $33
- ✕No IMAP, iCloud or Yahoo support
- Supported providers:
- Gmail and Outlook accounts
- Starter:
- $25 per member per month billed annually
- Business:
- $33 per member per month billed annually
- Annual discount:
- 17% off against monthly
- Free plan:
- No
Bottom line: Superhuman is the fastest way to work through a Gmail or Outlook inbox. Budget for Business at $33 if auto drafts are the reason you are buying.
- 03
Canary Mail
8.4/10A privacy-focused email app for Mac, iOS, Android and Windows with an AI Copilot and optional encryption.
Price
$3per user per month
Free plan; Growth from $3 per month billed yearly at $36 a year; Pro+ $10 per month billed yearly; lifetime options
“$3 /month Billed yearly at $36/year” Quoted from the pricing page, November 9, 2026.
- Free plan
- Yes
- Value (40%)
- 9.4
- Features (35%)
- 7.6
- Ease of use (25%)
- 7.8
Best forIndividuals who want AI replies and summaries in a full email app at the lowest price.
Canary Mail is the cheapest way to get AI writing help in a full email app. The free plan includes a unified inbox, snooze and pin, templates and unlimited mail accounts, and works across Gmail, Outlook, iCloud and IMAP. Growth costs $3 per month on yearly billing, $36 a year, and adds the AI Copilot, which generates replies, suggests subject lines and rewrites messages in a professional, friendly or concise tone, along with read receipts, send later, calendar scheduling, an inbox cleaner and app integrations. Pro+ at $100 a year adds PGP and SecureSend encryption, phishing and impersonation detection, misdirection prevention and priority support. Both paid plans are also sold as a one-time lifetime purchase. Canary says triage and indexing run on your device and that email never trains AI models. It is aimed at individuals rather than teams, and its AI is lighter than the agent tools higher up the price scale, but for $36 a year the value is hard to beat.
- ✓Cheapest paid plan in this list at $36 a year
- ✓Free plan with unlimited mail accounts
- ✓Lifetime purchase available for paid plans
- ✕No team inbox or shared drafting features documented
- ✕Encryption and phishing protection cost $100 a year on Pro+
- ✕Fewer AI automation options than Fyxer AI or Shortwave
- Supported providers:
- Gmail, Outlook, iCloud, IMAP
- Free plan:
- Yes, unlimited mail accounts
- Growth:
- $3 per month billed yearly at $36
- Pro+:
- $10 per month billed yearly at $100
- Platforms:
- macOS, iOS, Android, Windows
Bottom line: Canary Mail puts AI replies and summaries in a cross-platform app for $36 a year. Choose it when price matters more than team features.
- 04
MailMaestro
8.4/10An AI email assistant add-in for Outlook and Gmail that writes, summarizes, labels and follows up.
Price
$12per seat per month
Free plan; Email from $12 per seat per month billed annually; MaestroDuo with meetings $25
“Email $12 per seat/month” Quoted from the pricing page, November 9, 2026.
- Free plan
- Yes
- Free trial
- 14 days
- Value (40%)
- 8.8
- Features (35%)
- 8.0
- Ease of use (25%)
- 8.5
Best forOutlook and Gmail users who want AI drafting without switching to a new email app.
MailMaestro is the option for people who like their current inbox and only want the AI. It installs into Outlook from the Microsoft Marketplace or into Gmail from the Chrome Web Store, so nothing about the mail client changes. The Email plan costs $12 per seat per month on annual billing, and Maestro Labs says annual billing saves 20% against monthly. It writes, replies to and improves emails, summarizes long threads, and runs unlimited AI agents that label, draft and follow up. Adding meetings through MaestroDuo costs $25 per seat per month, $300 a year, against $348 for both products bought separately. Every paid plan starts with a 14-day trial, and the free plan stays available afterward. Security is a strength: the vendor lists SOC 2 Type II, GDPR and HIPAA compliance, with a BAA on request, and says data is never used to train AI models. Annual plans are not refundable, so use the trial before you commit.
- ✓No new email client to learn
- ✓Free plan you can keep after the 14-day trial
- ✓SOC 2 Type II, GDPR and HIPAA, with a BAA on request
- ✕Annual plans are not refundable after purchase
- ✕Monthly billing costs up to 20% more
- ✕SSO and custom retention need Enterprise
- Supported providers:
- Outlook and Gmail
- Free plan:
- Yes
- Email plan:
- $12 per seat per month billed annually
- MaestroDuo (email and meetings):
- $25 per seat per month, $300 a year
- Free trial:
- 14 days
Bottom line: MailMaestro brings AI drafting and summaries into Outlook or Gmail for $12 a seat. It is the value pick for teams that cannot change email clients.
- 05
Microsoft 365 Copilot in Outlook
8.2/10Microsoft's AI assistant built into Outlook, Word, Excel, PowerPoint and Teams for Microsoft 365 business users.
Price
$18per user per month
Copilot Business add-on from $18 per user per month paid yearly (promotional, normally $21); bundles with Microsoft 365 from $23.50
“Originally starting from $21.00 now starting from $18.00 $21.00 $18.00 user/month, paid yearly” Quoted from the pricing page, November 9, 2026.
- Free plan
- No
- Value (40%)
- 7.8
- Features (35%)
- 8.6
- Ease of use (25%)
- 8.4
Best forCompanies already on Microsoft 365 that want AI in Outlook and the rest of the Office apps.
For teams that live in Outlook, Copilot is the default choice because it is already part of the product. Microsoft says Copilot in Outlook helps you catch up on email, draft responses and manage your calendar, and the same license puts Copilot into Word, Excel, PowerPoint and Teams, with AI chat grounded in work data and pre-built agents for research and data analysis. The Copilot Business add-on is listed from $18 per user per month paid yearly, down from $21, and it sits on top of an existing Microsoft 365 business subscription. Buyers starting fresh can take a bundle instead: Business Standard with Copilot costs $23.50 per user per month paid yearly or $28.20 monthly, and Business Premium with Copilot $32 or $38.40. Microsoft also notes usage-based billing for select advanced AI features. Copilot does not help with Gmail or IMAP inboxes, and its email tools are less specialized than Superhuman or Fyxer AI, but it covers far more than email for one price.
- ✓Works inside the Outlook app people already use
- ✓One license covers AI across the Office apps
- ✓Bundles save buying email and AI separately
- ✕The add-on needs an existing Microsoft 365 business plan
- ✕The $18 rate is promotional against a $21 list price
- ✕Usage-based billing applies to some advanced AI features
- Supported providers:
- Outlook with Microsoft 365
- Copilot Business add-on:
- $18 per user per month paid yearly, list price $21
- Business Standard with Copilot:
- $23.50 per user per month paid yearly, $28.20 monthly
- Business Premium with Copilot:
- $32 per user per month paid yearly, $38.40 monthly
- Free trial:
- Offered, see Microsoft's trial terms
Bottom line: Copilot is the natural pick for Microsoft 365 companies, with AI in Outlook from $18 a user. Gmail users should look elsewhere.
- 06
Fyxer AI
8.1/10An AI assistant for Gmail and Outlook that sorts the inbox, drafts replies in your tone and takes meeting notes.
Price
$37per person per month
Free plan; Pro from $37 per person per month billed annually, $49 monthly; Team $64 billed annually
“$ 37 $ 49 / person / mo, billed annually” Quoted from the pricing page, November 9, 2026.
- Free plan
- Yes
- Free trial
- 14 days
- Value (40%)
- 6.8
- Features (35%)
- 9.0
- Ease of use (25%)
- 8.8
Best forClient-facing professionals who want an assistant that drafts every reply and tracks follow-ups.
Fyxer AI does more of the work on its own than most tools here. On Pro it drafts replies in your tone, labels the inbox automatically, records meetings and keeps a follow-up list updated, and it connects to Gmail, Outlook, Slack and Teams. Pro costs $37 per person per month on annual billing or $49 monthly. Team costs $64 billed annually or $99 monthly and adds unlimited shared spaces, assigned follow-ups, an organization profile built from team email and meetings, and MCP access so Claude, ChatGPT and other tools can use your context. Usage runs on credits: paid plans get unlimited credits for the first 3 months, then 3,000 per member on Pro and 6,000 pooled on Team. Sorting costs 0.2 credits per email and chat 20 credits per message. The free plan keeps 400 credits a month but leaves out automatic drafted replies. Every sign-up starts with a 14-day Team trial. It is capable, but the price puts it at the top of this list.
- ✓Drafts replies automatically rather than on request
- ✓Unlimited credits for the first 3 months on paid plans
- ✓Viewer seats cost nothing
- ✕Most expensive entry plan in this list
- ✕Free plan does not draft replies
- ✕Usage runs on credits, 3,000 a month on Pro after the launch offer
- Supported providers:
- Gmail and Outlook
- Free plan:
- Yes, 400 credits a month
- Pro:
- $37 per person per month billed annually, $49 monthly
- Team:
- $64 per person per month billed annually, $99 monthly
- Free trial:
- 14 days of Team
Bottom line: Fyxer AI is the most hands-off assistant, drafting replies and tracking follow-ups for you. At $37 a month it costs more than most, so use the trial to measure the time saved.
- 07
Shortwave
8.0/10An AI-first email client for Gmail and Google Workspace built around an assistant that searches, organizes and writes.
Price
$30per seat per month
Free plan; Business from $30 per seat per month, billed monthly; Premier $45; Max $120
“Everyday AI productivity $30 per seat / month” Quoted from the pricing page, November 9, 2026.
- Free plan
- Yes
- Free trial
- 14 days
- Value (40%)
- 7.0
- Features (35%)
- 9.0
- Ease of use (25%)
- 8.2
Best forGoogle Workspace users who want the most capable AI search and filters in their inbox.
Shortwave is the most AI-centered email client here, but only for Google accounts. Its own docs say Microsoft 365 and Exchange are not supported, Outlook.com works only through forwarding without sending from the address, and Yahoo, iCloud, Fastmail and Zoho work by forwarding to a Gmail account. Inside that limit the feature set is deep. Business costs $30 per seat per month, and new subscriptions are billed monthly. It includes AI search over 5 years of history, 3 AI filters that act on new mail, AI integrations and web browsing, autocomplete, summaries, attachment analysis, read statuses, link tracking and snippets. Premier at $45 adds the Advanced intelligence level, twice the AI usage, unlimited AI search history and 10 filters, and Max at $120 uses Claude Opus 4.6. The billing guide says the free plan includes most productivity features and the AI assistant, and one paid seat covers all your own accounts. For Workspace teams it is excellent; for Outlook users it is not an option.
- ✓Deepest AI search and organization in this list
- ✓One paid seat covers all of your own accounts
- ✓Free plan includes the AI assistant
- ✕Microsoft 365 and Exchange are not supported
- ✕Business includes only 3 AI filters
- ✕Highest tier costs $120 per seat per month
- Supported providers:
- Gmail and Google Workspace; Yahoo, iCloud and others via forwarding
- Free plan:
- Yes
- Business:
- $30 per seat per month
- Premier:
- $45 per seat per month
- Security:
- CASA Tier 2
Bottom line: Shortwave has the strongest AI search and filters for Gmail and Workspace. Teams on Microsoft 365 cannot use it.
- 08
Gemini in Gmail
7.9/10Google's Gemini AI assistant built into Gmail as part of Google Workspace business plans.
- Free plan
- No
- Free trial
- 14 days
- Value (40%)
- 7.6
- Features (35%)
- 7.8
- Ease of use (25%)
- 8.6
Best forSmall businesses that want Gmail, custom-domain email and AI on one Google bill.
Gemini in Gmail is not a separate product: Google includes the Gemini AI assistant in Gmail with Google Workspace Business Starter, alongside custom business email on your own domain, 30 GB of pooled storage per user, video meetings for 100 participants and the Google Vids video editor. Business Standard extends Gemini into Docs, Meet and other apps and adds 2 TB of pooled storage, meeting recording and appointment booking pages. Google says company data is not used to train its models. The appeal is simplicity: there is no new client to install, and the AI lives in the Gmail screen your team already knows. The limits are just as clear. It helps only with Gmail and Workspace mailboxes, and the email tools are general rather than the automated drafting and filtering found in Fyxer AI or Shortwave. Google's pricing page showed local currency from our location, so the USD price is pending and we have not used a figure here. Both plans include a 14-day trial.
- ✓AI comes with the email service, no extra app
- ✓14-day free trial
- ✓Familiar Gmail interface
- ✕Works only with Gmail and Google Workspace
- ✕Gemini beyond Gmail needs Business Standard
- ✕USD price not yet verified from this location
- Supported providers:
- Gmail and Google Workspace
- Entry plan with Gemini:
- Business Starter
- Storage on Starter:
- 30 GB pooled per user
- Free trial:
- 14 days
- USD price:
- Check pending
Bottom line: Gemini in Gmail is the easiest AI to adopt for businesses already on Google Workspace. Specialist tools go further on automation.
- 09
SaneBox
7.8/10A server-side email filter that sorts unimportant mail out of your inbox, now with an AI Bundle for drafts and summaries.
Price
$4.54per month
No free plan; Snack from $4.54 per month billed every 2 years (1 account); Lunch $7.46; Dinner $22.04
“Snack Our most popular plan $4.54 / mo (billed every 2 years)” Quoted from the pricing page, November 9, 2026.
- Free plan
- No
- Free trial
- 7 days
- Value (40%)
- 8.4
- Features (35%)
- 7.0
- Ease of use (25%)
- 8.0
Best forPeople who want a cleaner inbox in the email app they already use, on any provider.
SaneBox works differently from everything else here. It sorts mail on the server, so it works wherever you read email and needs no new app. The vendor lists Gmail, Microsoft 365, Apple iCloud, Yahoo Mail and Fastmail, plus any IMAP, Microsoft Exchange or ActiveSync server, the broadest support in this list. Snack costs $4.54 per month billed every 2 years and covers 1 account with 2 power features. Lunch is $7.46 for 2 accounts and 6 features each, and Dinner $22.04 for 4 accounts with every feature and phone support. Every plan includes Deep Clean, Organize and the Daily Digest. Power tools include SaneLater for low-priority mail, SaneBlackHole to banish senders, SaneNoReplies and custom snooze. The newer AI Bundle adds SaneDrafts replies in your voice, SaneSummary for folders, a list of emails awaiting reply and a condensed Digest, though its price is not on the plan table. The 7-day trial includes all features for up to 4 accounts.
- ✓Widest provider support, including Exchange and ActiveSync
- ✓No new email client required
- ✓Cheap entry price for a single account
- ✕Lowest price needs a 2-year commitment
- ✕Snack allows only 2 power features and 1 account
- ✕AI Bundle price is not listed on the pricing page
- Supported providers:
- Gmail, Microsoft 365, iCloud, Yahoo, Fastmail, IMAP, Exchange, ActiveSync
- Snack:
- $4.54 per month billed every 2 years, 1 account
- Lunch:
- $7.46 per month billed every 2 years, 2 accounts
- Dinner:
- $22.04 per month billed every 2 years, 4 accounts
- Free trial:
- 7 days with all features
Bottom line: SaneBox is the cheapest way to tame a noisy inbox on any provider without changing apps. Its AI drafting is newer and less documented than the email clients above.
- 10
Missive
7.6/10A shared team inbox for email, SMS and social messages with AI drafting, rules and assignments.
Price
$14per user per month
No free plan; Starter from $14 per user per month billed yearly (up to 5 users); Productive $24; Business $36
“Starter $ 14 per user/month Billed yearly” Quoted from the pricing page, November 9, 2026.
- Free plan
- No
- Free trial
- 30 days
- Value (40%)
- 7.2
- Features (35%)
- 8.2
- Ease of use (25%)
- 7.4
Best forSmall teams that handle client email together and want AI inside a shared inbox.
Missive is a team inbox first and an AI assistant second, which suits people who share client email with colleagues. It connects Gmail and Google Workspace, Outlook and IMAP accounts, and also WhatsApp, Messenger, Instagram and SMS through Twilio, Quo or Dialpad. Its AI can draw on Anthropic, OpenAI or Gemini models, using Missive AI credits or your own API key, and offers instant drafts, translation, conversation summaries and custom prompts. Starter costs $14 per user per month on yearly billing for up to 5 users and covers team inboxes, conversations, tasks and SOC 2 Type II compliance. Productive at $24 raises the limit to 50 users and adds integrations, up to 1,000 rules, automations, basic analytics and API and MCP access, while Business at $36 adds SAML SSO, IP restrictions and advanced analytics. There is no free plan, but the 30-day trial needs no card. Solo users will find simpler and cheaper tools above.
- ✓Bring your own AI key option
- ✓30-day free trial with no credit card
- ✓Email, SMS and social messages in one inbox
- ✕No free plan
- ✕Starter caps the workspace at 5 users
- ✕Rules, integrations and API need Productive at $24
- Supported providers:
- Gmail and Google Workspace, Outlook, IMAP
- Starter:
- $14 per user per month billed yearly, up to 5 users
- Productive:
- $24 per user per month billed yearly, up to 50 users
- Business:
- $36 per user per month billed yearly
- Free trial:
- 30 days, no credit card
Bottom line: Missive is the pick for small teams that answer client email together and want AI drafts in a shared inbox. Solo users pay for collaboration they will not use.
What to check before you pay
Start with your email provider
Provider support splits this category. Shortwave and Gemini in Gmail need a Google account, and Shortwave states that Microsoft 365 and Exchange are not supported. Copilot works in Outlook. Superhuman, Fyxer AI and MailMaestro cover Gmail and Outlook, while Spark, Canary Mail, SaneBox and Missive also handle IMAP accounts such as iCloud or Yahoo.
Decide between a new app and an add-on
Superhuman, Shortwave, Spark, Canary Mail and Missive replace the app you read email in. MailMaestro, Fyxer AI and Copilot work inside Gmail or Outlook, and SaneBox sorts mail on the server so it works in any client. Add-ons are easier for teams that cannot change their email client.
Compare the real monthly cost
Most prices here assume annual billing. Fyxer AI Pro is $37 per person per month billed annually against $49 monthly, and Spark Plus is $8.25 billed yearly against $10 monthly. Shortwave bills new subscriptions monthly at $30 per seat. SaneBox's lowest rate of $4.54 per month needs a 2-year payment.
Check which tier has AI drafting
Auto drafts in your own voice often sit on the second tier. Superhuman lists auto drafts on Business at $33, Spark lists Auto-Drafts on Pro, and Fyxer AI's free plan does not draft replies. Read the plan table before assuming the starting price covers drafting.
Watch usage limits on AI
Several tools meter AI. Fyxer AI uses monthly credits, 3,000 per paid member on Pro after a 3-month launch offer. Shortwave sets a daily AI quota that rises with each plan, and Microsoft notes usage-based billing for some advanced Copilot features.
FAQ
What is the best AI email assistant in 2026?
Spark is our top pick on value: it works with Gmail, Outlook, Exchange, iCloud, Yahoo and IMAP, and its Plus plan with AI costs $8.25 per user per month billed yearly. Superhuman is the premium choice for Gmail and Outlook from $25 per member per month billed annually.
What is the cheapest AI email assistant?
Canary Mail Growth costs $3 per month billed yearly at $36 a year and includes its AI Copilot. SaneBox Snack is $4.54 per month on a 2-year plan, and Spark Plus is $8.25 per month billed yearly. Spark, Canary Mail, MailMaestro, Shortwave and Fyxer AI also have free plans.
Which AI email assistants work with Outlook?
Microsoft Copilot works inside Outlook. Superhuman, Fyxer AI and MailMaestro support Outlook and Gmail, and Spark, Canary Mail, Missive and SaneBox connect Outlook accounts too. Shortwave does not support Microsoft 365 or Exchange accounts.
Which tools work with iCloud, Yahoo or other IMAP email?
Spark, Canary Mail, Missive and SaneBox connect IMAP accounts, and SaneBox lists iCloud, Yahoo and Fastmail by name. Shortwave can show these accounts only by forwarding them into a Gmail account.
Do I need to switch email apps to use AI?
No. MailMaestro and Fyxer AI work inside Gmail and Outlook, Copilot is part of Outlook, Gemini is part of Gmail, and SaneBox sorts mail on the server so it works in any client. Superhuman, Shortwave, Spark, Canary Mail and Missive are separate email apps.
Questions or corrections: editorial@rankozo.comSee our disclosure. Prices change; confirm on the vendor page before buying.
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