Hyper-personalized email at machine scale
Bind JSON payloads into your templates with zero friction. From personalized order summaries to conditional discount banners, every recipient sees relevant content.
Custom payload keys
Fallback safety guarantee
Template rendering speed
Engineered for developer velocity
Intuitive syntax
Use standard {{user.first_name}} and conditional {{#if is_premium}} tags that every developer already understands.
Bulletproof fallbacks
Define default values for missing attributes so your users never see awkward blank spaces or raw brackets.
Nested array loops
Loop over shopping cart line items, receipt records, and activity lists effortlessly.
How it works
Define your variables
Insert merge tags into subject lines, preheaders, and email body copy.
Pass JSON in your API call
Send structured data payloads alongside your transactional dispatch request.
Preview with live sample data
Test edge cases and missing fields directly inside the preview dashboard before sending.
Explore related features
50+ pre-built components
Build stunning, responsive transactional emails in minutes with tested components for receipts, alerts, onboarding, and invitations.
Optimised for deliverability
Lightweight markup, balanced image-to-text ratios, and clean link structures keep your transactional emails out of spam folders.
Deep localization
Deliver tailored multilingual emails, currency formats, and right-to-left layout orientations automatically based on recipient locale.
Ready to build with Real-time dynamic variables?
Join thousands of engineering teams delivering transactional and lifecycle email with blazing speed and zero downtime.