EpsilonUnlock marketing's full potential
vs
MailgunTransactional Email API Service For Developers
Comparison · Email Marketing · weekly run Nov 2
Epsilon vs Mailgun
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
Epsilon is the stronger AI pick in Email Marketing: it has a visibility score of 0.9 versus 0.9 for Mailgun.
Choose Epsilon if…
- You need ISO 27001 or SOC 2 audit for parts of the business coverage
- You prefer a larger, established vendor (5,000+ employees)
- flexible technology for high-volume programs
- campaign operations, strategy, and creative services
Choose Mailgun if…
- You need SOC 2 Type II or ISO/IEC 27001 or ISO 27701 or GDPR compliant or HIPAA compliant or PCI-compliant SAQ-A merchant coverage
- recommended for sending larger volumes programmatically
AI visibility side by side
Latest weekly run · Nov 2
| Metric | Epsilon | Mailgun |
|---|---|---|
| Visibility score | 0.9% | 0.9% |
| Change vs last week | New | New |
| Rank in Email Marketing | #35 | #36 |
| Share of voice | 0.2% | 0.2% |
| Mentions this run | 1 | 1 |
| Positive in AI answers | — | 0% |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
Epsilon 0pp · Mailgun 0pp over 0 weekly runs.
Engine by engine
Epsilon leads on 1 of 3 engines
ChatGPT
AI Mode
Perplexity
EpsilonMailgun
Head to head in AI answers
0 engine answers name both brands
0Epsilon ranked higher
0Mailgun ranked higher
Features, pricing & fit
| Dimension | Epsilon | Mailgun |
|---|---|---|
| Pricing model | — | Usage-based |
| Entry price | — | Free; paid from $15 / mo |
| Free plan | — | Yes |
| Deployment | — | Cloud, hosted in US and EU regions |
| Compliance | ISO 27001, SOC 2 audit for parts of the business | SOC 2 Type II, ISO/IEC 27001, ISO 27701, GDPR compliant, HIPAA compliant, PCI-compliant SAQ-A merchant |
| Support | — | Knowledge Center, Documentation, Ticket support, Chat support on higher plans |
| Founded | 1969 | 2010 |
| Headquarters | Irving, Texas, United States | — |
| Employees | 5,000+ | 201–500 |
| Funding | — | Growth investment (Thoma Bravo) · $51M raised |
| Best for | Brands that want personalized, omnichannel marketing run at individual level and at scale | Developers and engineering teams that need to send transactional and marketing email through an API |
Plans side by side
Epsilon
Pricing not available.
Mailgun
Free$0month
Basic$15month (10,000 emails included)
Foundation$35month (50,000 emails included)
Scale$90month (100,000 emails included)
EnterpriseCustomcustom
Pros and cons
Themes from the AI answers that mention each brand
Epsilon
- flexible technology for high-volume programs
- campaign operations, strategy, and creative services
Mailgun
- recommended for sending larger volumes programmatically
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “Epsilon vs Mailgun”, https://slateindex.ai/compare/epsilon-vs-mailgun, data of Nov 2, 2026. Licence: CC BY 4.0.