Your own accounts
Gmail and IMAP mailboxes in one browser inbox.
Missive is a team email app: shared and personal inboxes, internal chat on threads, rules, canned responses and SMS and social accounts, priced per user. Flaxxa Mails is a unified inbox for your own Gmail and IMAP accounts, with search, undo send, scheduled send and an API, included in your Flaxxa plan.
Capabilities
Everything Mails ships with.
Connect your mailboxes
The unified inbox
Search & organise
Compose & send
Adaptive sync
API, webhooks & Sign
What Missive lists on its own website beside what Flaxxa Mails does. Where their site doesn't say, the table says so.
At a glance
Flaxxa Mails wins outright on 1 of 16 capabilities.
Capability-by-capability below — judge for yourself.
| Capability | ![]() | Missive |
|---|---|---|
| Plans | ||
Free plan | See Flaxxa plans | 30-day trial |
Pricing model | Part of Flaxxa plans | Per user |
| Accounts | ||
Gmail | Yes | Yes |
Office 365 / Outlook | Not yet | Yes |
Other IMAP accounts | Yes | Yes |
SMS and social accounts | — | Yes |
| Reading and sending | ||
Undo send | Up to 60 seconds | Yes |
Send later | Yes | Yes |
Snooze | Marker for a day | Yes |
Canned responses | — | Yes |
Rules | — | Yes |
AI assistant | — | Yes |
| Teams and developers | ||
Shared inboxes | — | Yes |
Internal chat and comments | — | Yes |
APIadvantage | Yes | Productive and Business plans |
Desktop and mobile apps | — | Yes |
01 / 02
When the job is your own mailboxes, not a team queue.
Gmail and IMAP mailboxes in one browser inbox.
No separate per-user subscription for email.
Send from a connected mailbox from your own code, with webhooks.
02 / 02
Missive is built for teams that work email together.
Other comparisons
A Spark Mail alternative: Gmail and IMAP accounts in one browser inbox with undo send, scheduled send, search and an API, as part of your Flaxxa plan.
A Superhuman alternative that also connects IMAP accounts: one browser inbox with search, labels, undo send, scheduled send and an API.
Front is a shared inbox for teams; Flaxxa Mails is a unified inbox for your own Gmail and IMAP accounts. Which fits, and where Front is the better choice.

Partly. Both bring several email accounts into one inbox. Missive adds team features: shared inboxes, internal chat and comments, rules, canned responses and SMS and social accounts. Flaxxa Mails focuses on your own Gmail and IMAP accounts and doesn't have team features yet.
Native importer, free migration support, and a Free plan that lets you compare in your own workspace.
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