RelayStack

Scalable Email Infrastructure for Modern Applications

Reliable SMTP relay and API for transactional emails at scale

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Features

SMTP Relay

REST API

High Deliverability

Real-time Analytics

Secure Infrastructure

Use Cases

OTP Verification

Order Confirmations

Password Reset Emails

System Notifications

Pricing

Starter

$9/month

Growth

$29/month

Business

$99/month

Compliance

RelayStack is built for secure, permission-based email delivery.

CAN-SPAM compliant
GDPR-ready
No unsolicited emails allowed

About RelayStack

RelayStack Inc. is a US-based cloud email infrastructure provider designed for developers and businesses. Our platform focuses on reliability, scalability, and security.

Contact

Email: support@relaystack.us

Address: 1201 Market Street, San Francisco, CA, USA

Documentation

RelayStack provides a developer-friendly API and SMTP relay integration.

Example API endpoint:

POST /v1/send-email

Privacy Policy

We collect limited data to provide our services. We do not sell user data. Cookies may be used for analytics and performance.

Terms of Service

RelayStack only allows transactional and permission-based emails. Sending spam or unsolicited emails is strictly prohibited. All users must comply with CAN-SPAM regulations. Violating accounts will be terminated immediately.