Threads.io
Trigger automated behavior-driven emails (by SendGrid).
Threads.io launched on November 23, 2015 with 257 votes, #59 of 4,110 launches that month and more than 95% of that year's launches.
In plain words
Threads.io is an email marketing web app built on SendGrid that automates behavior-driven email campaigns. It enables users to trigger targeted messages based on specific user actions, making it useful for growth-focused marketers and businesses seeking to automate customer communications. The platform connects user behavior to email delivery, streamlining engagement workflows without manual intervention.
written from the facts on this page · September 2026
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