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Email and SMS workflows triggered by subscriptions, purchases, and customer activity

Email and SMS automation with distinct new-subscriber and timed-workflow behaviour

Email API and SMTP delivery with grouped unsubscribe management

Cross-channel lifecycle flows with editable templates and publishing permissions

Hosted email design with independent saved blocks, synced sections and export controls

Email campaigns and automation within a wider messaging workspace

Email preparation, rendering checks and ongoing monitoring in one current platform

Email campaigns and triggered scenarios with an integrated content editor

AI email tool that writes and designs emails for Klaviyo.

AI email assistant that organizes your inbox and drafts replies in your voice

Record and run realistic web and API load tests in real browsers, then review user-facing timings.

Describe mobile and web UI journeys as YAML flows and run them on a real or virtual target.

Record browser journeys and turn them into editable web end-to-end tests.

Group mobile app crashes, non-fatal errors, and Android ANRs into issues that teams can prioritize by user impact.

Build interactive terminal applications in Go with an event-driven model, update, and view loop.

Email API and SMTP sending with inbound message routing to applications

WordPress newsletter production with a shared email and web-publishing workflow

Search train journeys in Germany and across Europe

Plan international rail journeys to and from the Netherlands

Behavior analytics and replay for digital experiences

Recorded user journeys with step-by-step design annotations

Website journeys, forms and feedback in one analytics platform

Email and SMS campaigns with editor reuse and several billing routes

Build event-driven market simulations with a shared strategy engine