Email Api For High-volume Outbound Sending

Send millions of non-transactional emails/month with deliverability infrastructure built-in

✓Enterprise-grade infrastructure • Dedicated support • Custom setup

Trusted by research firms, investment banks, and large SaaS platforms

SIS International

Large Investment Bank

Large Growth Fund Agency

20M+

emails/month per customer

Zero

mailbox warmup required

API-First

outbound infrastructure

Email API Built for High-Volume Outbound Sending

REST API That Handles Scale Where Generic ESP APIs Break Down

Generic ESP APIs like SendGrid or Mailgun break down at scale. Our email API is built specifically for high-volume outbound sending (1M+/month) with deliverability infrastructure built-in.

Developer-Friendly Email API Service

Enterprise-grade REST API for sending at scale. Includes warmup, domain rotation, and deliverability monitoring. All accessible through our developer-friendly email API service.

Email Sending Service Designed for Outbound, Not Just Transactional

Unlike transactional email sending services, our platform is designed for outbound/engagement email at scale. Send millions of non-transactional emails/month with deliverability infrastructure built-in.

Customer Testimonials

"SuperSend handles our entire survey outreach infrastructure. We send 20 million non-transactional survey emails per month, and SuperSend's deliverability infrastructure ensures they actually land in inboxes. We tried SendGrid and Mailgun; they banned us. SuperSend is built for this scale."

• SIS International

Large Research Firm • 20M+ emails/month

"We needed infrastructure that could handle high-volume outbound without risking our primary domain. SuperSend's managed infrastructure (SMTP, IPs, domain pools, warmup) all handled for us. No engineering team required."

• Large Investment Bank

Investment Bank • 600K+ emails/month

"As a cold outbound agency, we send 20 million emails per month across multiple clients. SuperSend's infrastructure scales with us. The deliverability monitoring and domain protection are critical; we can't afford to burn domains."

• Large Growth Fund Agency

Cold Outbound Agency • 20M+ emails/month

Trusted by research firms, investment banks, and large SaaS platforms

Get Enterprise Email Infrastructure Built for Scale

Built for organizations sending 1M+ emails/month. Infrastructure designed for high-volume outbound. Warm-up, rotation, domain protection, and deliverability monitoring. All managed for you.

✓Enterprise-grade infrastructure • Dedicated support • Custom infrastructure plan