Mailgun vs. Customer.io
A side-by-side comparison based on G2 review data.
| Metric | Mailgun | Customer.io |
|---|---|---|
| Overall rating | 4.2 | 4.4 |
| Review count | 322 | 990 |
| Ease of use | 8.9 | 8.5 |
| Ease of setup | 8.9 | 8.2 |
| Quality of support | 8.4 | 8.8 |
| Meets requirements | 9.0 | 8.8 |
| NPS | 58.412698 | 59.487179 |
| Small Business | 80.6% | 59.3% |
| Mid-Market | 14.6% | 37.4% |
| Enterprise | 4.8% | 3.2% |
| Total page views | 1,011 | 3,321 |
| Total LLM citations | 56,245 | 29,712 |
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.
- Ease of Use
- Reliability
- Deliverability
- Features
- API Quality
- Accuracy
Customer.io
Customer.io is the leading customer engagement platform for product-led organizations. Engage users based on real behavior and build stronger customer relationships across email, SMS, push, in-app, and webhooks. Now with an intuitive AI agent that handles the repetitive work, your team can focus on timing, strategy, and getting more impact from every message.
- Ease of Use
- Automation
- Features
- Helpful
- Customer Support
- Automation Efficiency