Best software · Communications
10 Best Email Clients for Business of 2026
This list is for professionals who spend hours a day in email and want a faster app than the default client. Most of these apps sit on top of an existing Gmail, Google Workspace, Microsoft 365 or IMAP account, so you can switch clients without moving your email. We compared documented features and published prices for 10 apps: speed-focused clients (Superhuman Mail, Spark, Shortwave), the built-in options from Google and Microsoft, a team inbox (Missive), desktop clients (eM Client, Thunderbird, Mailspring) and a low-cost cross-platform app (Canary Mail). Prices are in USD where the vendor page showed USD; others are marked as pending.
By the Mojolin research desk · Updated November 12, 2026 · 10 tools compared · Prices checked on vendor pages, latest November 12, 2026
Questions or corrections: editorial@mojolin.com
Mojolin is self-funded How we score
Superhuman Mail is our top pick for a heavy work inbox: Split Inbox, keyboard shortcuts for every action, read statuses and follow-up reminders work on top of Gmail and Outlook, though Mail is sold only from the Superhuman Business plan. Spark is the best value, with unlimited accounts and a Smart Inbox on its Free plan. Shortwave leads on AI triage at $30 per seat, Missive is best when a team shares client email from $14 per user, and Canary Mail at $36 a year and Thunderbird at no cost cover tight budgets.
Top picks
Best overall
Superhuman Mail
8.7 / 10
executives, founders and sales leads who live in a Gmail or Outlook inbox
Read the review →Runner-up
Spark
8.6 / 10
professionals and small teams who want a smarter inbox with a free starting plan
Read the review →Also great
Gmail
8.4 / 10
teams that want business email and the client in one Google Workspace subscription
Read the review →Comparison table
| # | Tool | Pricing | Score | |
|---|---|---|---|---|
| 1 | Superhuman Mail | executives, founders and sales leads who live in a Gmail or Outlook inbox | Mail is included from the Superhuman Business plan, priced per member (see vendor pricing, USD check pending) | 8.7 |
| 2 | Spark | professionals and small teams who want a smarter inbox with a free starting plan | Free plan; Plus and Pro priced per user per month (see vendor pricing, USD check pending) | 8.6 |
| 3 | Gmail | teams that want business email and the client in one Google Workspace subscription | Business email through Google Workspace Business Starter, priced per user per month (see vendor pricing, USD check pending) | 8.4 |
| 4 |  Shortwave | teams that want an AI assistant to search, sort and draft email | Business $30 per seat per month; Premier $45; Max $120; 14-day free trial | 8.4 |
| 5 |  Microsoft Outlook | companies that run on Microsoft 365 and Exchange | Included with Microsoft 365 business plans, priced per user per month (see vendor pricing, USD check pending) | 8.3 |
| 6 |  Canary Mail | budget-conscious professionals who want AI and encryption across devices | Free plan; Growth $3 per month billed yearly at $36; Pro+ $10 per month billed yearly at $100; lifetime options | 8.2 |
| 7 |  eM Client | Windows and Mac users who want a full desktop client for any mail server | Free for home use; Personal and Business licenses sold yearly or as a one-time payment (see vendor pricing, USD check pending) | 8.2 |
| 8 |  Missive | small teams that discuss and hand off client email together | Starter $14 per user per month billed yearly (up to 5 users); Productive $24; Business $36; 30-day free trial | 8.2 |
| 9 |  Thunderbird | teams that want a free, open-source desktop client with no ads | Free; funded by donations | 8.0 |
| 10 |  Mailspring | individuals who want read receipts and send later at a low monthly price | Free app; Mailspring Pro $8 per month | 7.6 |
Scoring weights
Every tool gets three editorial scores out of 10, from vendor documentation, product pages and the published price. The overall score is the weighted average below, the same method on every list. Full method
The full ranking
Rank 1 · Best overall
Superhuman Mail
A keyboard-first email app for Gmail and Outlook accounts with Split Inbox, follow-up reminders, read statuses and an AI assistant.
superhuman.com8.7
out of 10
Best for: executives, founders and sales leads who live in a Gmail or Outlook inbox
Superhuman Mail is the app to look at first when email volume, not email features, is the problem. It sits on top of an existing Gmail or Outlook account and changes how you move through it: Split Inbox pulls messages from your team, VIPs or tools such as Google Docs, Notion and Asana into their own streams, and every action has a keyboard shortcut. Follow-up reminders bring a sent email back if nobody replies by the time you chose, and read statuses show when and on which device the message was opened. Snippets insert whole emails with attachments and CC or BCC, and can be shared across a team. Collaboration is light but useful: you can share a live view of a thread and teammates can comment even without a Superhuman seat. Since the Grammarly merger, Mail is sold inside the Superhuman suite and only from the Business plan, which also bundles Grammarly, Docs and Go. That makes it one of the pricier choices here if you only want the email client.
Standout feature
Superhuman Mail is the best choice for heavy inboxes because every action has a shortcut and unanswered emails return on a schedule you set.
Use cases
Founders and executives
Split VIP and team email from tool notifications
Outcome: Important threads get answered first
Account executives
Set a follow-up reminder on every proposal email
Outcome: Deals do not stall on unanswered messages
Small leadership teams
Share a live thread and comment on it
Outcome: Fewer forwards and screenshots in chat
Key features
- Split Inbox separates email from your team, VIPs or tools such as Google Docs, Notion and Asana
- Follow-up reminders: pick a time when you send and the email comes back if nobody replies
- Snippets insert phrases or whole emails, with attachments and CC or BCC, and can be shared with the team
- Read statuses show when and on which device a recipient opened your email
- Share a live view of any email so teammates can comment, even if they do not use Superhuman
Pros
- Built for Gmail and Outlook teams, so nobody has to change email provider
- Every action has a keyboard shortcut, plus Instant Reply, Snooze and Send Later
- Business plan adds HubSpot, Salesforce and Pipedrive views inside the inbox
Cons
- Mail is not in the Free or Pro plans; it starts on Business
- Only Gmail and Outlook accounts are supported, not generic IMAP
- Pricing page here shows EUR, so we could not confirm the USD price
Rank 2 · Runner-up
Spark
A cross-platform email app from Readdle with a Smart Inbox, Gatekeeper for new senders, AI drafting and team features such as shared inboxes.
sparkmailapp.com8.6
out of 10
Best for: professionals and small teams who want a smarter inbox with a free starting plan
Spark is the most balanced pick for someone who wants a faster inbox without paying for a premium client on day one. The Free plan already covers unlimited email accounts, the Smart Inbox, a unified inbox, snooze, send later, reminders and Gatekeeper, which holds first-time senders until you approve them. Plus adds the Spark +AI assistant for drafting, summaries and translations, 40 AI meeting notes a month, custom templates and productivity integrations with tools such as Todoist and Notion. Pro is aimed at client-facing people: unlimited meeting notes, Autopilot rules that organize and forward email, Auto-Drafts written in your voice, read statuses and a HubSpot integration. Team features are a real strength: shared inboxes for addresses such as sales@, private comments on threads, shared drafts and assignments. The limits to watch are on the free tier, which caps active collaborators at 2 and assignments at 10 per team. Calendars from Gmail, Outlook and other providers connect too, with Zoom, Google Meet and Microsoft Teams integrations.
Standout feature
Spark is the best free starting point because its Free plan covers unlimited accounts, the Smart Inbox and Gatekeeper for new senders.
Use cases
Consultants with several client mailboxes
Read every account in one Smart Inbox
Outcome: One place to triage instead of several apps
Small sales teams
Connect sales@ as a shared inbox and assign threads
Outcome: Clear ownership of each inquiry
Managers in many meetings
Use AI meeting notes on Plus
Outcome: Summaries next to the related email
Key features
- Smart Inbox and Unified Inbox across unlimited email accounts on the Free plan
- Gatekeeper screens first-time senders, plus Snooze, Send Later and follow-up reminders
- Spark +AI writing assistant, email summaries and AI meeting notes (40 per month on Plus)
- Shared inboxes for addresses such as sales@, with private comments, shared drafts and assignments
- Autopilot rules and Auto-Drafts written in your voice on the Pro plan
Pros
- Free plan includes unlimited email accounts and the Smart Inbox
- Connects calendars from Gmail, Outlook and other providers
- Team features include private comments, shared threads and shared drafts
Cons
- Read statuses and Auto-Drafts are limited to Pro
- Free teams get 2 active collaborators and 10 assignments
- Prices on the pricing page show in EUR from our location, so the USD price is pending
Rank 3 · Also great
Gmail
Google's email service, sold for business with a custom domain as part of Google Workspace, with Gemini built into Gmail.
google.com8.4
out of 10
Best for: teams that want business email and the client in one Google Workspace subscription
Gmail is the default for many small companies because it bundles the email service and the client: a Google Workspace plan gives every user a custom-domain address, Gmail on web and mobile, calendar, Meet and Drive. For a heavy inbox, its strengths are fast search and the Gemini assistant, which Google lists in Gmail from the Business Starter plan. Storage is pooled across the organization, with 30 GB per user on Starter, 2 TB on Standard and 5 TB on Plus, which matters if people keep years of attachments. Standard adds custom email layouts and mail merge, and Plus adds Vault for retention and eDiscovery. Business plans top out at 300 users, after which Enterprise applies. Gmail lacks some speed features that dedicated clients add on top, such as split inboxes by sender or read statuses, which is why many teams pair it with Superhuman Mail, Spark or Shortwave rather than replacing it.
Standout feature
Gmail is the best choice for an all-in-one setup because every Google Workspace plan pairs a custom-domain inbox with the Gemini assistant.
Use cases
New companies
Set up you@company.com addresses with Workspace
Outcome: Email, calendar and video meetings from one admin console
Teams sending announcements
Use mail merge on Business Standard
Outcome: Personalized emails without a separate tool
Regulated firms
Retain email with Vault on Business Plus
Outcome: Searchable archives for legal holds
Key features
- Custom business email (you@your-company.com) on every Workspace plan
- Gemini AI assistant in Gmail from Business Starter
- 30 GB pooled storage per user on Starter, 2 TB on Standard, 5 TB on Plus
- Mail merge and custom layouts on Business Standard
- Vault for retention and eDiscovery on Business Plus
Pros
- Email, calendar, Meet and Drive come in the same subscription
- 14-day free trial of Workspace
- Works in any browser, so there is nothing to install
Cons
- Starter, Standard and Plus plans are capped at 300 users
- Storage is pooled, so heavy mailboxes may need Standard
- Our location shows Workspace prices in PLN, so the USD price is pending
Rank 4
Shortwave
An AI-first email client with an AI assistant, AI filters, bundles, splits and team comments.
shortwave.com8.4
out of 10
Best for: teams that want an AI assistant to search, sort and draft email
Shortwave is the strongest choice here for people who want AI to do the sorting. Its assistant can search years of email, read attachments, browse the web and draft replies that learn your writing style, and AI filters act on new mail from a plain-English prompt. The Business plan at $30 per seat per month includes 5 years of AI search history, 3 AI filters and up to 50 threads per AI search, while Premier at $45 doubles AI usage and removes the search history limit. The core inbox tools are good without AI too: splits divide the inbox into tabs, bundles group newsletters and promotions, delivery schedules hold email until set times, and threads can become todos. Teams get comments, assignees, shared labels and live shared threads. The trade-offs are cost, since even the entry plan is priced like a premium client, and a daily AI quota that varies with the model level.
Standout feature
Shortwave is the best choice for AI-driven triage because its AI filters act on new email from plain-English rules on every paid plan.
Use cases
Operations leads
Ask the AI to find every invoice thread from a vendor
Outcome: An answer without manual searching
Busy founders
Set an AI filter to archive cold pitches
Outcome: A shorter inbox each morning
Sales teams
Auto-BCC email into HubSpot
Outcome: CRM records stay current
Key features
- AI assistant that searches, summarizes and acts on your email, with web browsing and attachment analysis
- AI filters that label, archive, star or delete new email from a plain-English prompt (3 on Business, 10 on Premier, 50 on Max)
- Splits, bundles and delivery schedules to group and time incoming email
- Todos, read statuses, link tracking, snippets and automatic follow-up reminders
- Team comments, assignees, shared labels and live shared threads
Pros
- AI search covers 5 years of history on Business and unlimited on Premier and Max
- Auto-BCC logs email into CRMs such as HubSpot and Salesforce
- Apps for iOS, Android, Mac and Windows
Cons
- The entry Business plan is $30 per seat, above most rivals here
- Daily AI usage is capped by quota, about 150 to 300 standard requests on Business
- Unlimited AI search history requires Premier at $45 per seat
Rank 5
Microsoft Outlook
Microsoft's email and calendar app for Windows, Mac, web and mobile, included with Microsoft 365 business plans.
microsoft.com8.3
out of 10
Best for: companies that run on Microsoft 365 and Exchange
Outlook is the practical default for any business already on Microsoft 365, because it is the client Exchange was built around. Calendars, shared mailboxes, encryption and admin policies behave as IT expects, and the same account works in new Outlook for Windows, classic Outlook, Outlook for Mac and the web. For a heavy inbox, Focused Inbox is the main tool: it sorts mail into Focused and Other tabs based on the people you interact with and filters out bulk and automated email. Rules, Quick Steps and conditional formatting handle repetitive actions, and you can schedule sends, recall a message and request read receipts. Microsoft also documents S/MIME encryption and sensitivity labels for protected email. The downsides are complexity, with settings that differ between versions, and fewer speed tools for triage than the dedicated clients on this list. Many Outlook users add Superhuman Mail, Missive or eM Client on top of the same Exchange account.
Standout feature
Microsoft Outlook is the best choice for Microsoft 365 shops because it is the native client for Exchange mail, calendars and encryption.
Use cases
IT-managed companies
Apply sensitivity labels and S/MIME to outgoing mail
Outcome: Protected email that follows company policy
Busy managers
Turn on Focused Inbox
Outcome: Bulk and automated email moves to Other
Support coordinators
Automate repetitive moves with Quick Steps
Outcome: One click instead of several
Key features
- Focused Inbox splits email into Focused and Other tabs based on who you interact with
- Rules, Quick Steps and conditional formatting to automate and highlight email
- Delay or schedule sending, message recall and read receipts
- S/MIME encryption and sensitivity labels for protected messages
- Teams chat with recipients and email sharing from inside Outlook
Pros
- The standard client for Exchange, so calendars, shared mailboxes and policies work as admins expect
- Available as new Outlook for Windows, classic Outlook, Outlook for Mac and Outlook on the web
- Focused Inbox learns from the senders you interact with
Cons
- Several versions (new, classic, web) have different settings
- Fewer keyboard-driven triage tools than Superhuman Mail or Shortwave
- Microsoft's US pricing pages did not load here, so the USD price is pending
Rank 6
Canary Mail
A cross-platform email app for Mac, Windows, iOS and Android with an AI Copilot, read receipts and PGP encryption.
canarymail.io8.2
out of 10
Best for: budget-conscious professionals who want AI and encryption across devices
Canary Mail is the cheapest way on this list to get an AI-assisted email client across every device. The Free plan already includes a unified inbox, unlimited accounts, snooze, pinned email, templates and lite read receipts. Growth, at $3 per month billed yearly at $36, adds the AI Copilot for prioritized tabs, writing, replying and summaries, full read receipts, send later, calendar and scheduling, an inbox cleaner and app integrations. Pro+, at $10 per month billed yearly at $100, is the security tier: PGP encryption, SecureSend encryption that Canary labels for HIPAA, phishing and impersonation detection, and misdirection prevention. One license covers Mac, Windows, iOS and Android, with 2 devices on Free and 5 on paid plans, and both paid plans can also be bought outright as lifetime licenses. It is built for individuals rather than teams, so there are no shared inboxes or assignments.
Standout feature
Canary Mail is the best choice for a low budget because its Growth plan with the AI Copilot costs $3 a month billed yearly.
Use cases
Freelancers with several accounts
Use the unified inbox on Free
Outcome: All accounts in one place at no cost
Healthcare and legal professionals
Send encrypted email with SecureSend on Pro+
Outcome: Sensitive attachments are protected
Busy consultants
Let the Copilot summarize long threads
Outcome: Faster reading on mobile
Key features
- Unified Inbox and unlimited email accounts on every plan, including Free
- AI Copilot for prioritization tabs, writing and summaries on Growth
- Read receipts, send later, calendar and scheduling on Growth
- PGP and SecureSend encryption, impersonation detection and misdirection prevention on Pro+
- One license covers Mac, Windows, iOS and Android
Pros
- Lowest paid price on this list at $36 a year for Growth
- 7-day trial of Pro+ with no credit card, then it drops to Free
- Lifetime purchase available for Growth and Pro+
Cons
- Licenses are single-user; there is no team billing on the pricing page
- Free plan covers 2 devices; paid plans cover 5
- Fewer team collaboration tools than Missive or Spark
Rank 7
eM Client
A desktop email, calendar, tasks, contacts and chat app for Windows and macOS that connects to any email service.
emclient.com8.2
out of 10
Best for: Windows and Mac users who want a full desktop client for any mail server
eM Client is a classic desktop client modernized with AI, and it suits people who want one app for everything on Windows or macOS. It connects to Google Workspace, Office 365, Exchange and other servers, and puts calendar, tasks, contacts, notes and chat beside email. A sidebar shows the communication and attachment history with the selected contact plus your agenda. Speed tools include a command palette, Quick Actions, snooze and watch for replies, and the AI Assistant and AI Summary help with long threads; MCP support lets you connect your own AI agent to your eM Client data. Profiles keep work and personal accounts in separate databases. Licensing matters for business: the Free plan is only for home use on one device with two accounts, and commercial use needs a Business license, which is counted per device and sold yearly or as a one-time payment. The mobile apps are free.
Standout feature
eM Client is the best choice for an all-in-one desktop client because it adds calendar, tasks, notes and chat to any email account.
Use cases
Windows users leaving classic Outlook
Import mail and calendars from Outlook
Outcome: Same data in a lighter app
Consultants with work and personal accounts
Split them into separate profiles
Outcome: Contacts and email never mix
Teams on mixed mail servers
Connect Exchange and IMAP accounts in one client
Outcome: One inbox for every server
Key features
- Works with Google Workspace, Office 365, Exchange and other email services
- Calendar, tasks, contacts, notes and chat in one app
- AI Assistant and AI Summary, plus MCP support to connect AI agents
- Command palette, Quick Actions, snooze and watch for replies
- S/MIME and PGP encryption, profiles for work and personal accounts
Pros
- One-time payment option with lifetime upgrades
- Mobile apps for iOS and Android are free and need no license
- 30-day free trial and 30-day money-back guarantee on paid licenses
Cons
- Free plan is limited to home use, 1 device and 2 email accounts
- Business licenses are counted per device
- Pricing page shows EUR from our location, so the USD price is pending
Rank 8
Missive
A collaborative email app that combines personal and team inboxes with internal chat, assignments, tasks and SMS or WhatsApp.
missiveapp.com8.2
out of 10
Best for: small teams that discuss and hand off client email together
Missive is the pick for people whose heavy inbox is really a team inbox. It connects Gmail, Outlook and IMAP accounts and keeps personal email private while letting you open any conversation to colleagues. Inside a thread you can chat internally, draft a reply together, assign it and see internal read statuses, which replaces forwarding and side conversations in chat apps. Conversations can become tasks with due dates and multiple assignees. Starter costs $14 per user per month billed yearly and covers up to 5 users with email, SMS and social accounts. Productive at $24 lifts that to 50 users and adds rules, integrations with tools such as HubSpot and Asana, basic analytics and API and MCP access. Business at $36 adds SAML SSO, IP restrictions and advanced analytics. Each user can connect up to 10 personal and 5 shared accounts. For a solo professional it does more than needed, but for small teams sharing client email it is one of the best values here.
Standout feature
Missive is the best choice for teams that share client email because internal chat and shared drafts live inside every thread from $14 per user.
Use cases
Accounting and law firms
Delegate client emails with assignments and due dates
Outcome: Nothing waits on one person's inbox
Agencies
Draft a client reply together in the thread
Outcome: One reviewed answer instead of forwards
Logistics teams
Handle WhatsApp and email in one inbox
Outcome: Fewer apps open during the day
Key features
- Team inboxes and personal inboxes in one app, with Gmail, Outlook and IMAP accounts
- Internal threads, collaborative drafting, assignment and internal read statuses
- Tasks with due dates, multiple assignees and a calendar view
- Rules and automations, AI drafts with Anthropic, OpenAI or Gemini models, and API and MCP access from Productive
- WhatsApp, Messenger, Instagram and SMS in the same inbox
Pros
- 30-day trial of the Productive plan with no credit card
- Personal email stays private unless you share a conversation
- Web, iOS, Android, macOS and Windows apps
Cons
- Starter is limited to 5 users
- Rules, integrations and analytics start on Productive at $24
- SAML SSO requires the $36 Business plan
Rank 9
Thunderbird
A free, open-source email, calendar and contacts app from the Mozilla family for Windows, macOS, Linux and Android.
thunderbird.net8.0
out of 10
Best for: teams that want a free, open-source desktop client with no ads
Thunderbird is the free option on this list and the only one that runs on Linux as well as Windows and macOS. It is open source, part of the Mozilla family and funded by user donations, and Thunderbird says it does not collect personal data, sell ads in your inbox or train AI on your conversations. The desktop app combines email, calendars and contacts, and you can read every account in a unified inbox or keep them separate. Filters and tags help organize a heavy inbox, and the layout and themes are highly customizable. There is also Thunderbird for Android. What it lacks is the newer layer of speed tools: there is no built-in AI assistant, no split inbox by sender, no read statuses and no team features such as assignments or comments. For a business that wants a dependable, no-cost client across mixed operating systems it is a sensible default.
Standout feature
Thunderbird is the best free choice because it is open source, costs nothing and runs on Windows, macOS and Linux.
Use cases
Small offices on mixed operating systems
Install one free client on Windows, macOS and Linux
Outcome: No license costs to track
Privacy-focused teams
Keep email in an open-source desktop app
Outcome: No ads or data collection in the inbox
Admins with many accounts
Use the unified inbox with tags
Outcome: Quick filtering across accounts
Key features
- Email, calendars and contacts in one desktop app
- Unified inbox or separate account views
- Tags, filters and customizable layouts and themes
- Desktop apps for Windows, macOS and Linux, plus Thunderbird for Android
- Open source, funded by user donations
Pros
- Free with no paid tier
- No ads in the inbox and no personal data collection, per Thunderbird
- Runs on Linux as well as Windows and macOS
Cons
- No built-in AI assistant
- No shared inboxes, assignments or team comments
- Fewer speed features such as split inboxes or read statuses
Rank 10
Mailspring
A free desktop email client with a Pro subscription that adds read receipts, link tracking, send later and follow-up reminders.
getmailspring.com7.6
out of 10
Best for: individuals who want read receipts and send later at a low monthly price
Mailspring is a free desktop email client with a paid Pro tier for people who send a lot of outbound email. Pro costs $8 per month and adds read receipts that show when and how many times an email was opened, link tracking, send later, follow-up reminders that resurface a thread if nobody replies, templates, snooze and a grammar check. Contact profiles show a sender's photo, job title and professional presence, and company overviews show size, location and industry, which helps when triaging email from people you do not know. Upgrading happens inside the app from Preferences. Compared with the rest of this list it is narrow: Mailspring Pro does not list AI drafting or summaries, and there are no shared inboxes, assignments or team billing. It suits a solo professional who mainly wants tracking and scheduling, not a team.
Standout feature
Mailspring is the best choice for low-cost email tracking because Pro adds read receipts and link tracking for $8 per month.
Use cases
Recruiters
Track opens on outreach email
Outcome: Better-timed follow-ups
Freelancers
Schedule replies with send later
Outcome: Email lands at the start of the client's day
Business development reps
Check company overviews before replying
Outcome: Faster triage of inbound leads
Key features
- Read receipts that show when and how often an email was opened
- Link tracking for links in sent email
- Send later and follow-up reminders that resurface unanswered threads
- Templates, snooze and grammar check
- Contact profiles and company overviews with size, location and industry
Pros
- The base app is free and Pro is upgraded from Preferences
- Pro costs $8 per month
- Contact and company profiles appear beside each email
Cons
- No AI drafting or summaries listed for Pro
- No shared inboxes or team assignments
- Pro features are sold per person, not as a team plan
Frequently asked questions
+What is the best email client for business?
Superhuman Mail is the best email client for business users with a heavy inbox. It runs on top of Gmail and Outlook accounts and adds Split Inbox, follow-up reminders and read statuses, though it is sold only from the Superhuman Business plan.
+What is the best free email client for business?
Thunderbird is the best free email client for business use because it is free forever, open source and runs on Windows, macOS and Linux. Spark also has a Free plan with unlimited accounts, while eM Client's free license is limited to home use.
+Is Superhuman worth it for business email?
Yes, if you process a high volume of email every day. Superhuman says Mail saves 4 hours per person every week, but Mail is included only from the Business plan, so cheaper tools such as Spark or Canary Mail suit lighter inboxes.
+What is the cheapest paid email client?
Canary Mail Growth is the cheapest paid plan on our list at $3 per month billed yearly at $36. Mailspring Pro costs $8 per month and Missive Starter costs $14 per user per month billed yearly.
+Which email client has the best AI features?
Shortwave has the most complete AI features on our list, with AI filters, AI search across up to 5 years of email and drafts in your writing style on its $30 Business plan. Spark Pro adds Auto-Drafts and Autopilot rules, and Canary Mail adds an AI Copilot for $36 a year.
+Which email client is best for teams that share an inbox?
Missive is the best email client for teams that share client email, with internal chat, shared drafts and assignment in every thread from $14 per user per month billed yearly. Spark and Shortwave also offer comments and assignments.
+Can I use a different email client with Microsoft 365?
Yes. Superhuman Mail supports Outlook accounts, and eM Client connects to Office 365 and Exchange, so you can keep Microsoft 365 for hosting and use another client for speed.
About this list
Updated November 12, 2026 by the Mojolin research desk. Mojolin is self-funded
Questions or corrections: editorial@mojolin.com
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