Growth · alternatives · 2026

24 alternatives to Inbox Flows

Research and compare emails from top brands & competitors

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Inbox Flows launched in 2021; newer entries below may have overtaken it.

1. 1
   Email Flows▲242

   Email flows from top brands.

   2019 · pageflows.com · its alternatives →

2. 2
   Upstream▲976

   The inbox designed for humans and agents

   Jun 2026 · upstream.do · its alternatives →

3. 3
   Email Flows▲340

   50+ readymade frameworks for automating email flows

   2022 · mailmodo.com · its alternatives →

4. 4
   Inbox by Google▲1,147

   Next generation inbox

   2014 · google.com · its alternatives →

5. 5
   Inbox flows▲6

   Monitor competitors' emails the easy way

   2018 · inboxflows.com · its alternatives →

6. 6
   Superflows▲476

   AI assistant for email - get to inbox zero faster

   2023 · superflows.ai · its alternatives →

7. 7
   Inbox Zero▲821

   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 →

8. 8
   Hello Inbox▲283

   Hey HN, I built an email deliverability SaaS with a RAG system. It's trained on all my knowledge and hundreds of real deliverability use cases from 4+ years experience as an Email Deliverability Specialist on Upwork. It solves a frustration problem a lot of businesses are experiencing. I'm looking for feedback so let me know in the comments.

   Aug 2026 · helloinbox.email · its alternatives →

9. 9
   Superinbox▲531

   Email vibing in your Gmail / Outlook

   Oct 2025 · superinbox.com · its alternatives →

10. 10
    Flow-e 2.0▲259

    Turn your Gmail & Outlook into Trello-like task lists 💌

    2018 · flow-e.com · its alternatives →

11. 11
    Flow-e▲221

    Turn your Gmail & Outlook into Trello-like task lists 💌

    2017 · flow-e.com · its alternatives →

12. 12
    Inside.com▲487

    The network of email newsletters

    2016 · inside.com · its alternatives →

13. 13
    Warmbox▲383

    Warm-up your inbox and never land in spam

    2021 · warmbox.ai · its alternatives →

14. 14
    Email Testing By Inbox Pirates▲355

    Preview, analyze & test emails with one click

    2022 · inboxpirates.com · its alternatives →

15. 15
    Hound▲114

    The fastest way to conduct competitive email research

    2025 · its alternatives →

16. 16
    Reviewik▲209

    Customer emails into insights: topics, keywords, sentiment

    2024 · darulamanperdana.my · its alternatives →

17. 17
    Saleswhale Email AI Conversation Flow▲102

    A new way to build intent-based lead conversion campaigns

    2021 · saleswhale.com · its alternatives →

18. 18
    Inbox, Spam, or Promotions?▲83

    See where your and your competition's emails are landing.

    2018 · gmass.co · its alternatives →

19. 19
    Userflows 2.0▲132

    Library of product user flows, screenshots and emails

    2024 · its alternatives →

20. 20
    Inbox Zero▲185

    Here’s how the most productive people manage their inbox.

    2020 · its alternatives →

21. 21
    INBOXOTA▲96

    Your all-in-one email management solution

    2023 · inboxota.framer.website · its alternatives →

22. 22
    [Sending]flow▲191

    All-in-one Webflow email autoresponder

    2024 · sendingflow.app · its alternatives →

23. 23
    iMailer▲115

    Email for busy professionals

    2022 · its alternatives →

24. 24
    SendView▲154

    Email addresses that analyze the sender's marketing strategy

    2018 · sendview.io · its alternatives →

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 →