G2 Vendor Directory

OutboundSMTP vs. Mailgun

A side-by-side comparison based on G2 review data.

MetricOutboundSMTP

by DuoCircle LLC

Mailgun

by Sinch

Overall rating4.44.2
Review count13322
Ease of use9.98.9
Ease of setup9.68.9
Quality of support9.28.4
Meets requirements9.79.0
NPS66.66666758.412698
Small Business76.9%80.6%
Mid-Market23.1%14.6%
Enterprise0.0%4.8%
Total page views291,011
Total LLM citations1056,245

OutboundSMTP

A High Performance Outbound SMTP Service. Perfect for Improved Deliverability and getting your email into the inbox. 24x7 live technical support, great track record of excellent client satisfaction.

Pros

    Mailgun

    150,000+ companies. 400 billion emails a year. 99.99% uptime — backed by SLA Mailgun is the full-stack email infrastructure platform developers and marketers trust to send, test, validate, and improve deliverability at scale. One platform covers the entire email lifecycle: preview and fix rendering issues before you send, clean your lists in real time, fire emails via API at any volume, and surface deliverability problems with AI before they cost you. SOC 2 Type I & II, HIPAA, GDPR, ISO 27001 certified. Trusted by Microsoft, Lyft, and American Express.

    Pros

    • Ease of Use
    • Reliability
    • Deliverability
    • Features
    • API Quality
    • Accuracy