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Dev tools · alternatives · 2026

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24 alternatives to We made a CLI and API to automate inbound email

Hi HN! We're a 5 person team working on simplifying the creation of email apps. Right now, most email services focus on outbound emails (newsletters, transactional, delivery), but that doesn't solve the fact that we all hate receiving them. You can try it at https://mailscript.com Mailscript lets you create programmable email addresses. It works headless, via the CLI, API (we use Swagger to support most languages). You can even run it as a daemon on a server (to run functions when emails arrive). Once you get [email protected], you can create as many aliases as you'd like…

Mailscript is a CLI and API tool for automating inbound email handling. It allows developers to create programmable email addresses that trigger actions when messages arrive, working headless or as a daemon on servers.… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. We made a CLI and API to automate inbound email launched in 2021; newer entries below may have overtaken it.

  1. 1
    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 →

  2. 2
    InboxSDK▲508

    First usable API to write Gmail Apps for 1B active users

    2015 · inboxsdk.com · its alternatives →

  3. 3

    A super simple CLI for sending emails. Contribute to chris104957/maildown development by creating an account on GitHub.

    2019 · github.com · its alternatives →

  4. 4
    Outbound▲117

    Generate personalized cold emails with AI

    2021 · tryoutbound.ai · its alternatives →

  5. 5

    Gmail JavaScript API. Contribute to KartikTalwar/gmail.js development by creating an account on GitHub.

    2013 · github.com · its alternatives →

  6. 6

    Create automated email sequences in 60 seconds

    2017 · growthtools.com · its alternatives →

  7. 7

    Enhance your mailto links with a convenient user interface.

    2019 · mailtoui.com · its alternatives →

  8. 8OS

    Hi HN! We’re Aleem, Chris, Borys, Meichen and Zach from Streak (YC S11) and today we’re open sourcing our InboxSDK https://www.inboxsdk.com, which makes it easy to build apps for Gmail. Over 1.8B users spend their days in Gmail! Having your app built into the Gmail workflow is a better user experience and gives you great user retention. InboxSDK gives you a high-level, declarative API to insert your UI into Gmail without having to directly manipulate the DOM yourself. End users install a browser extension to use your app. The SDK can add UI to multiple areas of Gmail. For example,…

    2022 · its alternatives →

  9. 9

    Extract data from emails. Automate your workflow.

    2016 · mailparser.io · its alternatives →

  10. 10

    Create unlimited email aliases for free. Protect your real email from spam by using a different address for each service. Privacy friendly, anonymous replies.

    2019 · anonaddy.com · its alternatives →

  11. 11

    APIs to send automated interactive emails with forms

    2021 · mailmodo.com · its alternatives →

  12. 12

    AI-powered cold outreach platform

    2023 · outboundly.ai · its alternatives →

  13. 13

    it will contain different utilities for GMail API over OAuth2 - abhishekkr/gmail-helper

    2020 · github.com · its alternatives →

  14. 14

    Turn any email inbox into a native interface for AI agents

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

  15. 15

    Email scripts that actually get replies 💌

    2018 · its alternatives →

  16. 16
    Ovy▲268

    One click AI-generated email replies for Gmail

    2022 · chromewebstore.google.com · its alternatives →

  17. 17

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

    Mar 2026 · mailercloud.com · its alternatives →

  18. 18

    Smart inbox, smart emails - AI at your service

    2023 · chromewebstore.google.com · its alternatives →

  19. 19
    EmailJS▲176

    Send email directly from Javascript. No server code needed.

    2019 · emailjs.com · its alternatives →

  20. 20

    AI to draft answers to all your inbound emails

    2023 · tinymagic.app · its alternatives →

  21. 21
    Inbix▲74

    Cloudflare-native Email Infrastructure for Developers

    Jul 2026 · inbix.xyz · its alternatives →

  22. 22

    Everything you need to start sending newsletters, drip campaigns, transactional emails. Mailcoach is a fully featured email marketing platform built for growing creators, developers, and businesses.

    2020 · mailcoach.app · its alternatives →

  23. 23

    Mailparser is powerful Email Parser Software to extract data, automate workflows, and eliminate manual data entry. Try it free today

    2013 · mailparser.io · its alternatives →

  24. 24
    AhaSend▲132

    I'm the founder of AhaSend. We've built a transactional email service specifically for developers, with a Pay-As-You-Go pricing model ($0.50 per 1,000 emails) and up to 70% volume discount for platform partners. While there are many ESPs out there, we focused heavily on the Developer Experience to solve the pain of building and testing email flows: * The CLI: Heavily inspired by the Stripe CLI, we built a tool that lets you develop and debug locally. You can listen to webhooks, trigger events, manage your domains, and send / list / debug messages directly from your terminal. * True…

    2024 · ahasend.com · 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 →