LitmusToolTest, track, and optimize your emails PricingFree Trial DeploymentCloud APIAvailableStartupToolbox·Jun 30, 2026Litmus is an all-in-one email marketing platform for designing, building, testing, and analyzing campaigns across 100+ email clients. It offers email previews, personalization, monitoring, and collaboration tools that integrate with major email service providers.Alternative toEOEmail on Acid|MMailtrap|Mailchimp
ReallyGoodEmailsToolThe largest curated catalog of emails on the web PricingFree tier DeploymentCloud Use caseemail design inspirationStartupToolbox·Jun 30, 2026A curated, searchable library of thousands of real marketing emails that email designers and marketers use for inspiration, plus tools to save and share collections. Now part of Beefree.Alternative toBBeefree|Mailchimp|MMilled
Rich email markup by GoogleToolAdd interactive actions and highlights to Gmail emails PricingFree tier DeploymentCloud APIAvailableStartupToolbox·Jun 30, 2026A Google developer feature that uses schema.org structured data markup in emails to surface actions and key information directly inside Gmail, such as one-click confirmations, view buttons, and order or reservation highlights.Alternative toAFAMP for Email
SendyToolSend newsletters 100x cheaper via Amazon SES PricingPaid DeploymentSelf Hosted APIAvailableStartupToolbox·Jun 30, 2026Sendy is a self-hosted email newsletter application that sends bulk email through Amazon SES at very low cost. It is sold as a one-time license and runs on your own PHP and MySQL hosting.Alternative toMMailerLite|LListmonk|MMailWizz
UglyEmailToolSee if an email is tracked before you open it Stars190 Forks16 Last commitMar 17, 2024StartupToolbox·Jun 30, 2026UglyEmail is a Gmail browser extension that detects and blocks tracking pixels in incoming email, marking tracked messages with an eyeball icon. It stores data locally in the browser and is open source.Alternative toPPixelBlock|TTrocker