Unified inbox pricing: flat plans, no per-message fees

Yes. Every new account starts on a free tier: 3 mailboxes and 300 AI classifications a month, with no card on file. Connect your accounts, watch the AI sort them, and if it earns its keep, pick a paid plan to raise both limits. Paid plans are month-to-month unless you choose yearly, and you cancel from your account whenever you like. No sales call, no credit-card gymnastics.

It depends on the plan: Solo connects up to 5 mailboxes, Growth up to 15, Scale up to 40, and Agency up to 120. Any provider that speaks IMAP with an app password counts, whether that is Gmail, Yahoo, iCloud, Zoho, GMX, or mail on your own domain. Outlook.com and Microsoft 365 are the exception and do not connect, because Microsoft retired basic authentication for Exchange Online in April 2026. You can add and remove accounts anytime.

No. Plans are flat, with no per-message or per-test fees. Higher plans include more AI sorting volume for heavy inboxes, but you always know the monthly number in advance. Unused volume does not roll over; it resets each month.

One credit is one request to the AI model. A message normally costs one: the model reads it, gives it a category and decides whether it is spam. It occasionally costs two, when a reply is drafted for that message as well, or when a first attempt failed and was retried. So the credit count on a plan is roughly the number of messages a month it will sort, and the mailbox limit and the credit allowance are two separate ceilings. If you exhaust the month's credits, nothing breaks and nothing is lost: your mail keeps arriving and stays fully readable, searchable and repliable on the board, it simply arrives unsorted, with no category and no spam verdict, until the allowance resets at the start of the next month. Your own subject and sender rules do not use the model, so they keep working throughout. You can also move up a plan at any time and the larger allowance applies immediately.

Yes, and both directions take effect immediately with prorated billing. An upgrade unlocks the bigger mailbox limit and AI allowance on the spot. A downgrade is immediate too, which is the part worth knowing before you click it: the smaller limits apply from that moment, not at the end of the period you have already paid for. If you have used more of the month's AI credits than the smaller plan includes, sorting pauses until they reset at the start of the next month, though your mail keeps arriving and stays readable, searchable and repliable the whole time. So if you want to ride out the period you paid for, cancel instead of downgrading and subscribe to the smaller plan when it lapses. Cancellation stops renewal while keeping access to the end of the paid period. Yearly plans work the same on a yearly cycle, at about two months off.

Neither, because there are no seats to charge for. Inboxes is a single-user product today: one login holds all of your mailboxes, and there is no way to invite a colleague or hand a message to someone else. What a plan buys is how many mailboxes you connect and how much AI sorting you get, not how many people sign in. If you need several people working one queue, a shared-inbox tool like Front or Hiver is the right buy instead of this.