The Best Email Apps for Multiple Accounts in 2026
Gmail, Outlook, Apple Mail, Spark, Spike and YAFOY compared for handling several email accounts: unified inbox, AI features, platforms and price.
By YAFOYEmail5 min read
Work email. Personal Gmail. The old Yahoo address you still use for shopping. Maybe a side-business account. Most of us have two or more, and switching between them is how messages get missed.
The good news: you don't need a separate app for each. Here are six email apps that handle several accounts well, from the free one you already have to apps that bring in chat too.
What to look for
- A unified inbox: all accounts in one list, with an easy way to filter by account.
- Easy replying from the right address.
- Smart sorting or AI help to surface what matters.
- Works on your devices: phone, computer or both.
1. Gmail app: free, and you probably have it
The Gmail app on Android, iPhone and iPad can add Outlook, Yahoo, iCloud and other IMAP accounts, up to five addresses. Google has been adding Gemini AI features to Gmail, including summaries and writing help, with some features limited to paid Google AI plans.
Best for: Gmail users who want everything in one familiar app.
2. Outlook app: best for Microsoft-centered work
Outlook for iPhone and Android can add Gmail accounts alongside Microsoft ones. Copilot can summarize email threads in Outlook's apps, depending on your Microsoft plan.
Best for: people whose job runs on Microsoft 365.
3. Apple Mail: simple and built in
On iPhone and Mac, Apple Mail holds several accounts and shows them together in All Inboxes. No account, no subscription, nothing to install.
Best for: Apple users who want simple and free.
4. Spark: the polished all-rounder
Spark by Readdle supports Gmail, Outlook, iCloud, Yahoo, Exchange and IMAP accounts, with a Smart Inbox that sorts personal mail from newsletters, plus AI summaries and writing help. It runs on Mac, Windows, iPhone and Android. Free with unlimited accounts; Plus $10 a month or $99 a year.
Best for: people whose overload is mainly email, across several accounts and devices.
5. Spike: email as conversations
Spike shows email like a chat, and adds team messaging, video calls, calendar and notes. It runs on Android, iPhone, Windows, Mac and the web. Free plan available; Pro $6 per user a month (billed annually).
Best for: people who prefer email to feel like messaging.
6. YAFOY: email plus everything else
YAFOY connects multiple Gmail and Outlook accounts on desktop browsers, Android and iPhone, with threaded replies and attachments, and puts them in a Mail tab next to Slack, Teams and texts, plus WhatsApp and other chats on Android. Insight reads across all of it and tells you which emails and messages need you first.
Best for: people whose real problem isn't just email accounts, but email plus work chat plus chats. See the Universal Inbox →
Where it differs from a dedicated email client: desktop focuses on Gmail and Outlook alongside Slack and Teams rather than supporting every email provider. Yahoo and Proton Mail have no direct account connection; supported notifications can appear on Android only. The desktop inbox is stored on that device, not mirrored from your phone.
Side by side
| Gmail app | Outlook app | Apple Mail | Spark | Spike | YAFOY | |
|---|---|---|---|---|---|---|
| Accounts | Gmail + up to 5 others | Microsoft + Gmail | Most providers | Gmail, Outlook, iCloud, Yahoo, IMAP | Most providers | Gmail, Outlook |
| Unified inbox | Yes | Yes | All Inboxes | Smart Inbox | Yes | Mail tab + all apps |
| Chat apps too | No | No | No | No | Team chat | Slack, Teams, chats (Android) |
| AI help | Gemini (some features paid) | Copilot (plan-dependent) | Apple Intelligence (device-dependent) | AI summaries, writing | Not compared | Insight priorities |
| Platforms | Android, iPhone, web | Android, iPhone, desktop | iPhone, iPad, Mac | Mac, Windows, iPhone, Android | All, plus web | Desktop browser, Android, iPhone |
| Price | Free | Free; Microsoft 365 for some features | Free | Free; $10/mo | Free; $6/user/mo | Free; $6.99/mo |
Features and prices as of October 2026.
Which should you choose?
- Free and simple: the Gmail app, the Outlook app or Apple Mail.
- The best dedicated email app: Spark.
- Email that feels like chat: Spike.
- Email plus Slack, Teams and chats, with AI priorities: YAFOY.
Try YAFOY free if your email is only half the story.
Multiple mailboxes at your desk
In desktop YAFOY, connect each Gmail or Outlook mailbox you want to use. Replies to received messages use the mailbox that received them, rather than assuming every reply should come from your first account. Slack and Teams can sit alongside those emails. Google Calendar and Outlook events can be viewed in Calendar after the relevant connections and permissions are granted; additional Outlook mailbox calendars are not all imported automatically.
Frequently asked questions
For a dedicated email app, Spark is a strong choice across devices. For free options, the Gmail app, Outlook app and Apple Mail all handle several accounts.
Yes. Gmail, Outlook, Apple Mail, Spark and Spike offer combined inbox views. YAFOY combines connected Gmail and Outlook mailboxes, including multiple accounts, with Slack and Teams.
YAFOY shows Gmail and Outlook alongside Slack and Teams, plus WhatsApp on Android.