Honest comparison
Shift Alternative That Puts Every Mailbox in One Sorted Inbox
Connect every mailbox you own to one board, in the browser, and let AI read each message to categorize it and flag spam before you open it.
Any IMAP provider · AI category + spam per message · Archiving synced back
In short
Shift is a Chromium-based desktop browser for Mac and Windows that keeps several Gmail, Outlook and Yahoo accounts signed in, plus Slack, calendars and other web apps, organized into Spaces. Shift Advanced costs $19.99 a month or $199.99 a year, and a plan with no charge allows 5 Spaces with 10 apps each. It switches between inboxes; it does not merge them into one list. Inboxes is a browser unified inbox that pulls every IMAP mailbox into one list and sorts each message by AI. If most of your Spaces are mailboxes, that is the reason to switch.
The difference
Where Inboxes and Shift actually diverge
Shift solves a real problem well. Anyone who has signed out of one Google account to check another, or kept three browser profiles open just for mail, understands why people pay for it. Shift keeps every account signed in, puts an icon for each one down the side of the window, and lets you group work, side projects and personal life into separate Spaces. It has grown from an email switcher into a full browser with templates, a layout builder and its own AI assistant, which is why the paid plan now sits at $19.99 a month. The catch for heavy email users is in the word switch. Shift moves you from one inbox to the next without logging out, but each inbox is still its own webmail page. If you run four mailboxes, you still open four inboxes, read four lists and triage each one by hand. The provider address you have had since 2005, a mailbox on your own small business domain or a Zoho account all have to be added as web pages, and anything without a decent webmail is awkward. Inboxes starts from the mail instead of the browser. It connects any mailbox that speaks IMAP, which covers Gmail through an app password, Yahoo, AOL, iCloud, Zoho, your own domain and most US internet provider addresses, and lays every message on one board. An AI model reads each new message as it lands, gives it a category and a spam verdict, and archiving syncs back to the real mailbox so your phone stays in step. It runs in the browser you already use, so there is no second browser to install and keep signed in on every computer, and the same board opens on a Chromebook or a Linux laptop.
Side by side
Inboxes vs Shift
| Capability | Inboxes | Shift |
|---|---|---|
| Merges several mailboxes into one list | Yes | No, you switch between inboxes |
| Connects any IMAP mailbox, including ISP and own-domain mail | Yes | Only through that provider webmail page |
| Outlook.com and Microsoft 365 accounts | No | Yes |
| AI categorizes every incoming message | Yes | No |
| AI spam verdict on top of the provider filter | Yes | No |
| Wraps Slack, calendars, drives and any other web app | No | Yes |
| Several accounts of the same service signed in at once | Yes | Yes |
| Runs in the browser you already use, nothing to install | Yes | Separate Chromium browser to install |
| Runs on a Chromebook or Linux | Yes | Mac and Windows downloads only |
| Provider-native labels, rules and features | Folders over IMAP | Yes |
| Entry paid price | $24.50/mo yearly or $49 monthly, 5 mailboxes | $19.99/mo or $199.99/yr (Advanced) |
Pricing and features verified from each vendor's public pricing page and quoted in the currency the vendor publishes. Both products change, so check the current page before you buy.
Where Shift wins
If your Spaces are full of Outlook accounts, Slack, Google Calendar and project tools, Shift is the better buy, and we would rather say so. Shift supports Outlook and Microsoft 365 accounts, which Inboxes does not. It wraps any web app, not only mail, keeps calendars and drives next to each inbox, has a usable plan at no charge with 5 Spaces, and every Gmail label and Outlook rule behaves exactly as it does in the provider webmail. Shift also gives a full refund within 14 days of a purchase or renewal. Inboxes does one job, which is mail from many IMAP providers in one sorted list, and it does not try to replace your browser.
FAQ
Questions people ask before switching
What is the best Shift alternative?
It depends on what you keep in Shift. If most of your apps are mailboxes, Inboxes is the closest fit, because it merges every IMAP mailbox into one list and sorts it by AI instead of switching between webmail pages. If you want another all-app workspace browser, Wavebox and Rambox do the same job as Shift for less money. If you only need Gmail on a Mac, look at Mimestream.
How much does Shift cost?
Shift Advanced costs $19.99 a month or $199.99 a year, which saves $40 against paying monthly, on the Shift pricing page. A plan with no charge covers 5 Spaces with 10 apps in each and limited use of Shift AI. Advanced unlocks unlimited Spaces and apps, more AI use and priority support with video calls. Refunds are available within 14 days of a purchase or renewal.
Is Shift browser free?
Partly. Shift has a plan with no charge that gives you 5 Spaces, 10 apps per Space, the browser builder and templates, and limited Shift AI. That is enough for a few email accounts. Unlimited Spaces and apps and expanded AI use need Shift Advanced at $19.99 a month or $199.99 a year.
Does Shift have a unified inbox?
No. Shift keeps each Gmail, Outlook or Yahoo account signed in and lets you jump between them without logging out, but each account still opens as its own webmail inbox. To read several providers as one list, you need a unified inbox such as Inboxes, Thunderbird Unified Folders or eM Client.
Is Shift a browser or an email client?
Shift is a browser. It is built on Chromium, runs Chrome extensions and hosts web apps such as Gmail, Outlook on the web, Slack and calendars inside Spaces. It has no mail engine of its own and no IMAP connector, so it shows each mailbox through the provider webmail page. Inboxes is the opposite: a mail client that runs inside your existing browser.
Shift vs Wavebox, which is cheaper?
Wavebox is cheaper. Wavebox Pro costs $8.33 a month paid annually, about $100 a year, while Shift Advanced costs $199.99 a year or $19.99 a month. Rambox Pro is cheaper again at $70 a year. All three keep each webmail in its own tab, so for email specifically none of them merges your mailboxes into one list.
Can I use Shift with Gmail and Outlook at the same time?
Yes. Shift lets you add several Google and Microsoft accounts and keep all of them signed in, with an icon for each one in the sidebar. You still read them one at a time. Inboxes connects Gmail with an app password, plus Yahoo, iCloud, Zoho, GMX and your own domain over IMAP, and shows their messages together on one board. Outlook.com and Microsoft 365 mailboxes are not supported.
Is Shift worth $199 a year?
Yes, if you live in many web apps and many Google and Microsoft accounts all day and want them in one window. It is harder to justify if you bought it mainly to manage several email accounts, because it keeps every inbox separate and leaves the sorting to you. At that price a unified inbox that merges and sorts mail does more of the actual work.
Keep comparing
More on running every mailbox from one place
Put every mailbox on one sorted board
Connect your accounts over IMAP and let the AI categorize and de-spam your mail from the first message.