Email infrastructure and deliverability for developers

A curated set of tools developers reach for when building email features. Includes deliverability and verification (DNSBL, DMARC, SPF/DKIM, spam-trap scoring), drag-and-drop email design tools, and the ESP connectors and MCP servers that wire it all together. Most are SaaS with free tiers; a few are open-source.

min8t
min8tList by min8t, last updated 
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  1. Klaviyo icon
     Like

    Optimize customer engagement with multichannel messaging, CRM integration, and AI-driven analytics, unifying marketing, service, and data for B2C brands.

    Cost / License

    • Paid
    • Proprietary

    Platforms

    • Online
    • Software as a Service (SaaS)
    Klaviyo screenshot 1
    Klaviyo screenshot 1
  2. Email design tool offering over 1600 templates, interactive AMP support, drag & drop and code editing, team collaboration, pre-send testing, and integration with 90+ email providers.

    Cost / License

    • Free Personal
    • Proprietary

    Application type

    Platforms

    • Online
    Stripo.email screenshot 1
    Stripo.email screenshot 1
    Stripo.email screenshot 2
    +3
    Stripo.email screenshot 3
  3. Mailchimp icon
     Like

    All-in-one platform for creating, automating, and sending marketing emails, building landing pages, running ad campaigns, and analyzing audience engagement.

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Apple Watch
    Mailchimp screenshot 1
    Mailchimp screenshot 1
    Mailchimp screenshot 2
    +2
    Mailchimp screenshot 3
  4. DeBounce icon
     Like

    Email list validation tool: Simple, fast & accurate. DeBounce service allows you to upload and validate lists of email addresses quickly and in a secure way. All you have to do is upload an email list to it's web interface. DeBounce also offers API.

    Cost / License

    • Paid
    • Proprietary

    Application type

    Platforms

    • Online
    Upload your email list in a TXT or CSV format file by dragging a file into the dotted area and wait for application to process your list. Duplicated row will be indicated and you do not pay for duplicates.
    We start processing to make sure your list does not contain bad emails. All syntax, spamtraps, bounce, catch-all and disposable emails will be identified with DeBounce.
    Once your list has been verified, you can download your cleaned list. Download section is flexible and you can customize export file. Easily separate all sections with some clicks.
  5. MxToolBox icon
     Like

    All of your MX record, DNS, blacklist and SMTP diagnostics in one integrated tool. Input a domain name or IP Address or Host Name. Links in the results will guide you to other relevant tools and information.

    Cost / License

    • Freemium
    • Proprietary

    Platforms

    • Online
    MxToolBox screenshot 1
    MxToolBox screenshot 1
  6. ZeroBounce is an email validation software that cleans your email list by removing invalid emails, reducing the risk of bounces and protecting your sender reputation. It also removes known email complainers and spam traps from your list.

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Online
    • iPhone
    ZeroBounce screenshot 1
    ZeroBounce screenshot 1
    ZeroBounce screenshot 2
    +1
    ZeroBounce screenshot 3

This list is maintained by min8t.com, which publishes open-source MCP tools for email deliverability (@deliveriq/mcp on npm) and a freemium email infrastructure platform.

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