EpsilonUnlock marketing's full potential
vs
SenderEmail marketing, automation and transactional emails for growing businesses
Comparison · Email Marketing · weekly run Nov 2
Epsilon vs Sender
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
Sender is the stronger AI pick in Email Marketing: it has a visibility score of 13.9 versus 0.9 for Epsilon.
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 Sender if…
- You want the brand AI engines rank higher (13.9 vs 0.9)
- Generous free plan limits
- High-value feature set for budget campaigns
- Lowest cost option
AI visibility side by side
Latest weekly run · Nov 2
| Metric | Epsilon | Sender |
|---|---|---|
| Visibility score | 0.9% | 13.9% |
| Change vs last week | New | New |
| Rank in Email Marketing | #35 | #9 |
| Share of voice | 0.2% | 3.7% |
| Mentions this run | 1 | 18 |
| Positive in AI answers | — | 73% |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
Epsilon 0pp · Sender 0pp over 0 weekly runs.
Engine by engine
Sender leads on 3 of 3 engines
ChatGPT
AI Mode
Perplexity
EpsilonSender
Head to head in AI answers
0 engine answers name both brands
0Epsilon ranked higher
0Sender ranked higher
Features, pricing & fit
| Dimension | Epsilon | Sender |
|---|---|---|
| Pricing model | — | Flat tiers |
| Entry price | — | Free; paid from $9 / mo |
| Free plan | — | Yes |
| Deployment | — | Cloud |
| Integrations | — | 100+ |
| Compliance | ISO 27001, SOC 2 audit for parts of the business | — |
| Support | — | 24/7 email and live chat, Priority support on Professional, Phone support and dedicated success manager on Enterprise |
| Founded | 1969 | 2012 |
| Headquarters | Irving, Texas, United States | Vilnius, Lithuania |
| Employees | 5,000+ | 11–50 |
| Funding | — | Bootstrapped |
| Best for | Brands that want personalized, omnichannel marketing run at individual level and at scale | Small businesses, growing teams, creators and ecommerce brands |
Plans side by side
Epsilon
Pricing not available.
Sender
Free Forever$0month
Standard$9month (500 subscribers, monthly billing)
Professional$15month (500 subscribers, monthly billing)
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
Sender
- Generous free plan limits
- High-value feature set for budget campaigns
- Lowest cost option
- Email automation with segmentation, landing pages and forms
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “Epsilon vs Sender”, https://slateindex.ai/compare/epsilon-vs-sender, data of Nov 2, 2026. Licence: CC BY 4.0.