UnInbox

UnInbox is a collaborative email workspace for teams that need shared conversations, comments, and visible work statuses. It suits professionals coordinating role-based mailboxes, particularly those comfortable with open-source software or a more involved self-hosted setup. The best choice depends on whether you value unlimited addresses and team workflow more than a turnkey inbox and long retention on the free tier.

Overview

UnInbox puts team email into shared spaces. Colleagues can comment on a conversation, reply from a shared address, and use workflow statuses to show whether work remains open or is complete. That combination gives support and operations teams a clearer handoff process than separate personal inboxes.

You can add unlimited addresses, including admin@, support@, sales@, and billing@. The codebase is open source, and the project provides instructions for running it locally. Running your own instance requires manual email configuration, with production guidance directed through the project’s Discord. Self-hosting therefore favors teams with someone willing to manage mail infrastructure rather than organizations seeking a fully managed deployment.

Key features

Shared collaboration

Shared spaces let teammates discuss conversations internally and send replies from shared addresses. Workflow tracking makes the state of each message visible to the group, which is useful for queues that involve handoffs, approvals, or follow-up. A personal mailbox user is unlikely to gain much from these team-oriented controls.

Addresses and extensibility

Unlimited addresses allow separate identities for functions such as sales and billing without imposing a published address count.

Open-source and self-hosted operation

The open-source repository offers a local installation path and more control over where the service runs. The trade-off is operational work: email configuration is manual, and production setup help is routed through Discord. Choose this route when control and source access outweigh the convenience of a hosted setup.

Pricing

Free

The Free plan costs nothing and provides an @uninbox.me email address, Personal Spaces, three workflows per space, seven-day raw email retention, and community/email support. It is suitable for an individual exploring the product or handling short-lived mail. The three-workflow cap and very short raw-email window make it a weak fit for teams that need a durable record or several distinct processes.

Pro

Pro costs $12 a month, billed per user. It adds unlimited custom domains, Teams, unlimited shared and public spaces, SMTP and API access, conversation assignees, priority chat support, and video call support. This is the practical tier for collaborative work: custom domains and shared spaces replace the personal focus of Free, while assignees make ownership explicit. Per-user billing means costs rise with the team, but the plan removes the Free tier’s listed workflow and address constraints.

Enterprise

Enterprise uses custom pricing and requires a minimum of 30 users. It includes everything in Pro plus a dedicated instance, custom IP, SAML SSO, 10-year conversation activity history, 10-year raw email retention, dedicated onboarding, and organization-wide video-call support. Large organizations with identity, isolation, and long-retention requirements are the intended audience; smaller teams cannot meet the stated minimum.

Platforms

UnInbox is offered through the web and API, with a self-hosted option. The API supports programmatic access, while self-hosting adds the configuration responsibilities described above. It is a standalone mail platform rather than a mobile application.

Who it's for

UnInbox fits professionals and teams sharing support, sales, administrative, or billing mail. Pro is the clearest match for teams that need multiple shared spaces, custom domains, assignments, and responsive support. Free works for personal experimentation or workflows where seven-day raw-email retention is acceptable. Enterprise is for organizations of at least 30 users that need SAML SSO, dedicated infrastructure, and decade-long retention. Readers wanting a conventional individual inbox or zero-configuration deployment should look elsewhere.

Pros and cons

Pros

• Unlimited addresses: separate role-based mail identities without a published address limit.
• Visible teamwork: comments, shared replies, statuses, and Pro assignees make responsibility easier to follow.
• Open-source option: technically capable teams can run the software locally and retain more operational control.
• Enterprise retention: ten-year conversation history and raw-email retention support long-lived records.

Cons

• Free retention is brief: raw email is retained for only seven days, limiting archival use.
• Self-hosting takes work: manual email configuration and Discord-directed production guidance add operational overhead.
• Free is personal: Personal Spaces and three workflows per space do not provide the team features in Pro.
• Enterprise has a high entry point: the 30-user minimum excludes smaller organizations needing SSO or dedicated infrastructure.

Alternatives

For a broader directory of shared-inbox products, see Shared Inbox Software.

• Serif is a paid, cross-platform option with a free plan and trial, plus email triaging and drafting alongside meeting, task, and knowledge-base tools.
• Zoho TeamInbox offers a freemium shared-inbox product for Android, iOS, and web users, with channels, rules, internal discussions, and draft sharing.
• Coherence is a freemium Android, API, and web service whose listed tiers combine shared records with AI credits and user limits.
• Help Scout provides a freemium API-based setup; its Free plan includes five users, one Inbox, one Docs site, and capped contacts, replies, and tags.
• Maxdesk is a web freemium help-desk option with unlimited agents, tickets within fair usage, email-to-ticket, and basic SLA policies on Free.
• Zavu Inbox is a free API and web service focused on shared WhatsApp, Telegram, Instagram, and Messenger connections, with monthly message limits.
• MailStack is a free, self-hosted, open-source alternative with a single-node reference deployment.
• Sharebox is a freemium web and extension product whose Free plan supports two shared inboxes, unlimited team members, assignments, and status tracking.

Verdict

Choose UnInbox if your team needs collaborative handling of many role-based addresses, explicit workflow status, and the option to run open-source software yourself. Pro is the sensible starting point for ongoing team use because it adds shared spaces, custom domains, assignments, and stronger support. Look elsewhere if you need a hands-off hosted inbox, a generous free archive, or enterprise controls for fewer than 30 users.