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Dev tools · alternatives · 2026

24 alternatives to UnInbox: Spaces & Workflows

Open source collaborative email platform to get shit done

UnInbox is an open source collaborative email platform that enables teams to create shared inboxes with multiple addresses and assign workflow statuses to individual emails. It tracks emails through their lifecycle and… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. UnInbox: Spaces & Workflows launched in 2024; newer entries below may have overtaken it.

  1. 1
    UnInbox▲877

    Open source modern email for teams and professionals

    2024 · uninbox.com · its alternatives →

  2. 2

    Email vibing in your Gmail / Outlook

    Oct 2025 · superinbox.com · its alternatives →

  3. 3

    Enterprise software portal for team collaboration

    2019 · blog.dropbox.com · its alternatives →

  4. 4

    Revolutionary AI email, reimagined for teams

    2024 · superhuman.com · its alternatives →

  5. 5

    Clean Up Your Inbox In Minutes Newsletter management, AI automation, and email analytics. Inbox Zero is the open-source email app that puts you back in control of your inbox.

    2023 · getinboxzero.com · its alternatives →

  6. 6
    Front 2.0▲500

    Shared team inboxes to manage Email, Twitter, SMS & more

    2014 · front.com · its alternatives →

  7. 7
    SharedBox▲100

    Shared inbox for your team; in Slack

    2018 · its alternatives →

  8. 8

    Send or receive emails from Slack

    2021 · sharedinbox.co · its alternatives →

  9. 9

    Collaboration tool built for teams

    2015 · dropbox.com · its alternatives →

  10. 10

    Hello HN! I wanted to share something we at Good Enough (https://goodenough.us) built over the past year: Jelly! https://letsjelly.com Jelly is a simpler shared inbox for small teams (like us) to answer team email. We had just been sharing a login to Fastmail previously, but as email started getting busier, that really started to stink as a solution — no one knew who was going to answer what, if someone else saw an email or not, etc etc. And a Google Group would prove to be worse, as replies too easily got lost to personal inboxes if someone accidentally didn’t “Reply…

    2024 · letsjelly.com · its alternatives →

  11. 11
    Front▲303

    Efficient email for teams

    2018 · front.com · its alternatives →

  12. 12
    Front 3.0▲400

    Team Inboxes for Email, Twitter, Text & more

    2016 · front.com · its alternatives →

  13. 13

    Email collaboration for teams.

    2018 · polymail.io · its alternatives →

  14. 14

    The fastest way to find, store, and share content

    2022 · air.inc · its alternatives →

  15. 15
    Teamflow▲490

    Feel like a team again with your own virtual office

    2021 · teamflowhq.com · its alternatives →

  16. 16
    UniDeck▲359

    Hi everyone! For the past few months we have improved upon our product called UniDeck, an app that allows you to connect different services and monitor their data. From every day services like Google and Github to your in-house api and tools, everything can be connected to a single dashboard and shared with your team for easy access, monitoring and collaboration. We have worked hard in the past 6 months since our previous launch to add a lot of features work on user feedback. UniDeck now has first class support for more than 15 services and has advanced widgets including tables and charts…

    2025 · unideck.app · its alternatives →

  17. 17
    Mailflow▲267

    Run your business from Gmail

    2020 · getmailflow.com · its alternatives →

  18. 18

    The first inbox for teams

    2016 · front.com · its alternatives →

  19. 19

    Emailing for teams: Organize your Inbox into channels 💌

    2018 · intheloop.io · its alternatives →

  20. 20
    Helpwise▲131

    Shared inbox for your team email addresses

    2019 · helpwise.io · its alternatives →

  21. 21
    Zapmail▲172

    Slack as an email service

    2023 · zapmail.app · its alternatives →

  22. 22

    Enabling teams to manage shared conversations and tasks

    2016 · its alternatives →

  23. 23
    UnRemot▲141

    A video based platform for effective remote working

    2020 · unremot.com · its alternatives →

  24. 24

    Hi all! I'm Kristyna, maker of Sidemail. I'd love to share with you what we've been building. We built Sidemail because sending emails from a SaaS app was way harder than it should be. Sidemail is made for developers and teams that want one simple place to handle SaaS emails with reliable delivery and no bloat. It has: - Everything for creating, managing and delivering SaaS emails in one platform, - Easy-to-use email API for sending password resets, receipts, etc. - Messenger for writing product updates and newsletters, - Email automations for onboarding and lifecycle flows, - Fast email…

    Nov 2025 · sidemail.io · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →