Deliverability Center 2.0
Precision infrastructure for high-volume email.
htsend.com is the platform for enterprise deliverability, multi-tenant sending workflows, and campaigns that scale from your first send to a billion a month.
Trusted by senders moving 1B+ emails per month. First 300 emails free.
Engineered for control.
Deliverability Center
Advanced reputation monitoring
Real-time visibility into sender reputation across major inbox providers. Automatic warm-up protocols, complaint-spike pausing, and bounce handling that scales with your volume.
Visual automation builder
Design lifecycle journeys without writing code. Branch on opens, clicks, purchases, and tags, with webhooks at every step.
Realtime analytics pipeline
Stream raw events to webhooks or your warehouse. Opens, clicks, bounces, complaints, and revenue attribution at low latency.
Bring your own SMTP
Amazon SES, Mailgun, Postmark, SendGrid, or any custom relay. Rotate and load-balance across providers.
Multi-tenant & white-label
Agency accounts, isolated client workspaces, custom sending domains, and per-tenant branding built in.
Campaigns & A/B testing
Test subject lines, sender names, and content blocks with statistical reporting on every variant.
The new standard for high-performance email.
Stop fighting deliverability and start scaling on a platform built for the next billion messages.