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Open Source Sendgrid Alternatives

The best open source alternative to Sendgrid is Postal. If that doesn't suit you, our users have ranked more than 50 alternatives to Sendgrid and three of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Sendgrid are Mailwhale and Cuttlefish.io.

Sendgrid alternatives are mainly Email Marketing Services but may also be CRM Systems or Customer Support Tools. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Sendgrid.
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  • Online

Scalable email delivery for transactional email SendGrid transparently handles DKIM, SPF, ISP rate limits, content...

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  1. Postal icon

    Postal

    • Linux
    • BSD
    • Self-Hosted
    5 alternatives to Postal 

    The open source mail server - Postal is a complete and fully featured mail server for use by websites & web servers. Think Sendgrid, Mailgun or Postmark but open source and ready for you to run on your own servers.

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  2. Mailwhale icon

    Mailwhale

    • FreeOpen Source
    • Online
    • Self-Hosted
    68 alternatives to Mailwhale 

    A bring-your-own-SMTP-server mail relay with REST API.

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  3. Cuttlefish.io

    • FreeOpen Source
    • Self-Hosted
    67 alternatives to Cuttlefish.io 

    Cuttlefish offers basic bounce email handling, ensuring you maintain your good mail reputation by not resending to bounced addresses.

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