Best email apps for Outlook
These connect to Outlook and Microsoft 365 accounts. Check that a third-party app supports your work account: some companies only allow Microsoft's own apps.
Quick answer Spark Mail is the top pick, followed by Microsoft Outlook and Thunderbird.
Top pick
Spark Mail by Readdle
Email client by Readdle with a smart inbox, AI assistant and shared team inboxes.
- Works with Outlook
- Price
- Free plan · paid from $8.25/user/mo
- Works on
- Mac, Windows, iPhone, Android
- Accounts
- Gmail, Outlook, iCloud, Any IMAP
- AI features
- Yes
- Shared inbox
- Yes
Price, checked Oct 26, 2026Free plan · paid from $8.25/user/moTry Spark Mail free
Microsoft Outlook by Microsoft
Microsoft's email and calendar app; free with ads, ad-free with a Microsoft 365 plan.
- Works with Outlook
- Price
- Free plan · paid from $1.67/user/mo
- Works on
- Mac, Windows, iPhone, Android, Web
- Accounts
- Gmail, Outlook, iCloud, Any IMAP
- AI features
- Yes
- Shared inbox
- Yes
Price, checked Oct 26, 2026Free plan · paid from $1.67/user/moTry Microsoft Outlook free
Thunderbird by MZLA Technologies (Mozilla)
Free, open-source desktop email client funded by donations, now also on Android.
- Works with Outlook
- Price
- Free
- Works on
- Mac, Windows, Linux, Android
- Accounts
- Gmail, Outlook, Any IMAP
Price, checked Oct 26, 2026FreeTry Thunderbird free
Canary Mail by Cartasec
Email app with an AI Copilot, read receipts, PGP encryption and shared inboxes.
- Works with Outlook
- Price
- Free plan · paid from $3/user/mo
- Works on
- Mac, Windows, iPhone, Android
- Accounts
- Gmail, Outlook, iCloud, Any IMAP
- AI features
- Yes
- Shared inbox
- Yes
Price, checked Oct 26, 2026Free plan · paid from $3/user/moTry Canary Mail free
Mail by Apple
Built into macOS, iOS and iPadOS: Apple's mail app, with Apple Intelligence summaries.
- Works with Outlook
- Price
- Free
- Works on
- Mac, iPhone
- Accounts
- Gmail, Outlook, iCloud, Any IMAP
- AI features
- Yes
Price, checked Oct 26, 2026FreeTry Mail free
Superhuman Mail by Superhuman
Keyboard-driven email app with AI drafting and team sharing for Gmail and Outlook.
- Works with Outlook
- Price
- From $25/user/mo
- Works on
- Mac, Windows, iPhone, Android, Web, Chrome extension
- Accounts
- Gmail, Outlook
- AI features
- Yes
- Shared inbox
- Yes
Price, checked Oct 26, 2026From $25/user/moGet Superhuman Mail
Gmail by Google
Google's email service on web and mobile, with Gemini drafting and thread summaries.
- Works with Outlook
- Price
- Free plan · paid from $7/user/mo
- Works on
- iPhone, Android, Web
- Accounts
- Gmail, Outlook, iCloud, Any IMAP
- AI features
- Yes
- Shared inbox
- Yes
Price, checked Oct 26, 2026Free plan · paid from $7/user/moTry Gmail free
Airmail by Bloop
Customizable email client for iPhone, iPad and Mac that supports most account types.
- Works with Outlook
- Price
- Free plan · paid from $3.33/user/mo
- Works on
- Mac, iPhone
- Accounts
- Gmail, Outlook, iCloud, Any IMAP
- AI features
- Yes
Price, checked Oct 26, 2026Free plan · paid from $3.33/user/moTry Airmail free
Missive by Heliom
Team email, chat and tasks in one app, with shared inboxes and AI drafts.
- Works with Outlook
- Price
- From $14/user/mo
- Works on
- Mac, Windows, iPhone, Android, Web
- Accounts
- Gmail, Outlook, iCloud, Any IMAP
- AI features
- Yes
- Shared inbox
- Yes
Price, checked Oct 26, 2026From $14/user/moTry Missive free
Front by Front
Shared inbox and customer communication platform for support and operations teams.
- Works with Outlook
- Price
- From $25/user/mo
- Works on
- Mac, Windows, iPhone, Android, Web
- Accounts
- Gmail, Outlook
- AI features
- Yes
- Shared inbox
- Yes
Price, checked Oct 26, 2026From $25/user/moTry Front free
Compare the top picks
| App | Price | Works on | Accounts | AI features | Shared inbox |
|---|---|---|---|---|---|
| Spark Mail | Free plan · paid from $8.25/user/mo | Mac, Windows, iPhone, Android | Gmail, Outlook, iCloud, Any IMAP | Yes | Yes |
| Microsoft Outlook | Free plan · paid from $1.67/user/mo | Mac, Windows, iPhone, Android, Web | Gmail, Outlook, iCloud, Any IMAP | Yes | Yes |
| Thunderbird | Free | Mac, Windows, Linux, Android | Gmail, Outlook, Any IMAP | – | – |
| Canary Mail | Free plan · paid from $3/user/mo | Mac, Windows, iPhone, Android | Gmail, Outlook, iCloud, Any IMAP | Yes | Yes |
| Free | Mac, iPhone | Gmail, Outlook, iCloud, Any IMAP | Yes | – | |
| Superhuman Mail | From $25/user/mo | Mac, Windows, iPhone, Android, Web, Chrome extension | Gmail, Outlook | Yes | Yes |
| Gmail | Free plan · paid from $7/user/mo | iPhone, Android, Web | Gmail, Outlook, iCloud, Any IMAP | Yes | Yes |
| Airmail | Free plan · paid from $3.33/user/mo | Mac, iPhone | Gmail, Outlook, iCloud, Any IMAP | Yes | – |
| Missive | From $14/user/mo | Mac, Windows, iPhone, Android, Web | Gmail, Outlook, iCloud, Any IMAP | Yes | Yes |
| Front | From $25/user/mo | Mac, Windows, iPhone, Android, Web | Gmail, Outlook | Yes | Yes |
How we picked
We compared 15 email apps and kept the 10 that fit this guide. We don't test apps ourselves: features and prices come from each app's own site, and the order follows what independent reviewers recommend. No app pays to be listed or placed higher, and whether an app pays us a commission never changes its place.
Questions
How are these apps ranked?
Apps that independent "best of" roundups recommend come first, the most often recommended at the top; the rest follow with the best-known first. Every app listed meets this guide's needs.
Are these links sponsored?
Links to apps whose affiliate programs have approved Build Your Toolkit are affiliate links, marked as such, so we may earn a commission if you sign up for a paid plan. It doesn't change what you pay, and no app pays to be listed or placed higher.
Where do the prices come from?
From each app's own pricing page, on the date shown next to the price. Prices for email apps change often, so check the vendor's page before you buy.