Dev tools · alternatives · 2026

24 alternatives to ShuttleCloud

API for importing address books from 242 email providers.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. ShuttleCloud launched in 2015; newer entries below may have overtaken it.

1. 1
   Mailercloud Email API Platform▲165

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

   Mar 2026 · mailercloud.com · its alternatives →

2. 2
   Mailcloud▲110

   A New Way to Email

   2014 · mailcloudapp.com · its alternatives →

3. 3
   APIPark▲719

   Your open source AI gateway & API developer portal

   2024 · apipark.com · its alternatives →

4. 4
   Mailmeteor▲567

   Send hundreds of personalized emails with Gmail.

   2019 · mailmeteor.com · its alternatives →

5. 5
   inbound ▲227

   Hey HN! I've been working on Inbound (inbound.new) - an email system that lets you programmatically manage email addresses and route them to AI agents, webhooks, or forward them anywhere. The core idea: instead of manually managing email addresses, you create them on-demand via API and route incoming emails to your AI agents or other automated systems. For AI Agents: Create [email protected] and emails get sent to your AI agent as webhooks. Your agent can reply using our SDK. Perfect for AI customer support or automated responses. For Email Forwarding: Set up [email protected] to…

   2025 · inbound.new · its alternatives →

6. 6
   Stamplia API▲150

   Get thousands of email templates into your application

   2015 · its alternatives →

7. 7
   Mailercloud▲203

   Launch successful email campaigns like a pro

   2022 · mailercloud.com · its alternatives →

8. 8
   Mailercloud▲257

   Automate, optimize, convert, next level email automation

   2024 · mailercloud.com · its alternatives →

9. 9
   Context.IO▲226

   API for email inboxes

   2015 · its alternatives →

10. 10
    Helo▲103

    An independent email API from former Postmark folks

    22d ago · helohq.com · its alternatives →

11. 11
    Cloudflare Email Service▲168

    Turn any email inbox into a native interface for AI agents

    Apr 2026 · blog.cloudflare.com · its alternatives →

12. 12
    Rabbits▲246

    Outsource programming tasks as simple as sending an email

    2015 · its alternatives →

13. 13
    MailClark▲198

    The Slack bot for external communications

    2016 · its alternatives →

14. 14
    EasyListing▲102

    Create, manage, and grow your email list

    2025 · its alternatives →

15. 15
    Mail Rocket▲141

    Create a mail merge with Gmail and Google Sheets

    2024 · mailrocket.io · its alternatives →

16. 16
    ContactRescue▲92

    Magically get your address book up-to-date and accurate

    2017 · contactrescue.evercontact.com · its alternatives →

17. 17
    ContactSaver▲79

    Convert email signatures into address book contacts

    2014 · apps.apple.com · its alternatives →

18. 18
    CloudSponge Address Book Widget▲85

    Let your users look up contacts without leaving your site.

    2016 · cloudsponge.com · its alternatives →

19. 19
    Read AI for Gmail▲172

    Capture conversations wherever they occur

    2024 · read.ai · its alternatives →

20. 20
    Switchboard▲99

    Open-source email processing built in Erlang

    2014 · its alternatives →

21. 21
    MailSlurp▲103

    End-to-end email testing made easy

    2018 · mailslurp.com · its alternatives →

22. 22IB
    I built Mailhub – A scalable API for sending emails with ease not tears▲104

    2024 · mailhub.sh · its alternatives →

23. 23
    MailToDock▲70

    Turn Gmail into Google Tasks with AI-powered

    Apr 2026 · mailtodock.vercel.app · its alternatives →

24. 24
    Free Email Finder & Verifier▲69

    Find quality emails from a domain and verify their validity

    2022 · minelead.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 →