Alternatives

Products that do what KaiMail does

Custom domain emails, simplified

1. 1
   ImprovMX▲292

   Free email forwarding

   2019

2. 2
   Thanks.io▲146

   Direct mail automation platform

   2023

3. 3
   DevMail▲183

   Email sandbox for software developers

   2024

4. 4
   Mango Mail▲204

   Affordable and easy-to-use mail host w/ unlimited addresses

   2023

5. 5IM
   I made a MailChimp alternative that connects to your database▲302

   Hi all! Excited to share cc.dev after months of work and refinement. The idea for this product came from trying to do email marketing for my side project, CubeDesk, a site where Rubik's Cube enthusiasts can time themselves, race with one another, train algorithms — it's a fun niche! With over 40k users, sending even a single campaign was becoming expensive with MailChimp. I knew AWS SES would be much cheaper, but it’s just an API with none of the other necessities you need for a robust email marketing platform. Beyond cost, I was also frustrated with having to make sure my database was…

   2023 · cc.dev

6. 6
   Sidemail.io▲204

   Email delivery made simple for startups

   2020

7. 7
   rasa.io▲209

   Send an email that won't get deleted

   2021

8. 8
   Sidemail MCP▲150

   Let AI agents write & manage your SaaS emails

   Dec 2025

9. 9
   SuperMailOS▲4

   Business email on your own domain, live in five minutes

   Aug 2026 · supermailos.com

10. 10
    Pawn Mail▲92

    Email hosting for custom domains

    2014

11. 11
    SendHustle▲1

    Email campaigns and automations from your own domain

    6d ago · sendhustle.com

12. 12
    Mailercloud Email API Platform▲165

    1,000+ Emails per Second with 99%+ Deliverability

    Mar 2026

13. 13
    Cart Casino by Sumo.com▲100

    The newest and coolest way to grow your email list.

    2017

14. 14
    DMARC Digests▲101

    Protect your brand from email scammers.

    2020

15. 15
    SimpleLogin▲116

    Open source email alias. Clean inbox. Custom domain, PGP,...

    2021

16. 16
    Murmure for Gmail▲77

    Send a private message to your BCC recipient 💬

    2018

17. 17
    Faruno▲77

    A unique email address within one inbox

    2019

18. 18EF
    Email forwarding for your domain – my SaaS after 10 years of failure▲17

    2021 · hanami.run

19. 19
    Email SDK▲25

    One email SDK for every provider

    Jun 2026 · email-sdk.dev

20. 20
    kysigned▲13

    E-sign documents by forwarding an email. $0.25.

    Jul 2026 · kysigned.com

21. 21VE
    Versatile email infrastructure on AWS serverless▲29

    It's a self-hosted mailbox for all emails coming to your own domains, with Web interface and CLI included. Notes: - all emails share the same inbox, as long as set your DNS correctly - Web client via self-hosted Docker or Cloudflare Pages - need additional access controls, may use Basic Auth or Forward Auth with Cloudflare deployment

    2024 · github.com

22. 22
    Mailbird▲3

    Your own email service. Unlimited emails. Unlimited domains.

    Apr 2026

23. 23
    Flowmails | CF native domain email box▲4

    Stop paying per user. Centralized multi-domain email inbox.

    Jul 2026 · flowmails.net

24. 24
    ReMail by Quarred▲3

    Own your SMTP. Own your reputation.

    Jul 2026 · remail.quarred.com

Ranked by how close each launch is in meaning, then by votes. Refine with a description →