MailgunTransactional Email API Service For Developers
vs
SenderEmail marketing, automation and transactional emails for growing businesses
Comparison · Email Marketing · weekly run Nov 2
Mailgun 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 Mailgun, and ranks ahead in 0% of the answers that name both.
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
- You prefer a larger, established vendor (201–500 employees)
- Usage-based pricing suits your budget better than flat tiers
- recommended for sending larger volumes programmatically
Choose Sender if…
- You want the brand AI engines rank higher (13.9 vs 0.9)
- You want a lower entry price ($9 vs $15)
- AI answers describe it more positively (73% vs 0% positive)
- Flat tiers pricing suits your budget better than usage-based
AI visibility side by side
Latest weekly run · Nov 2
| Metric | Mailgun | Sender |
|---|---|---|
| Visibility score | 0.9% | 13.9% |
| Change vs last week | New | New |
| Rank in Email Marketing | #36 | #9 |
| Share of voice | 0.2% | 3.7% |
| Mentions this run | 1 | 18 |
| Positive in AI answers | 0% | 73% |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
Mailgun 0pp · Sender 0pp over 0 weekly runs.
Engine by engine
Sender leads on 3 of 3 engines
ChatGPT
AI Mode
Perplexity
MailgunSender
Head to head in AI answers
1 engine answers name both brands
1Mailgun ranked higher
0Sender ranked higher
| Prompt | Engine | Mailgun | Sender |
|---|---|---|---|
| How do companies send and measure email campaigns without a dedicated tool? | ChatGPT | #3 | #4 |
Features, pricing & fit
| Dimension | Mailgun | Sender |
|---|---|---|
| Pricing model | Usage-based | Flat tiers |
| Entry price | Free; paid from $15 / mo | Free; paid from $9 / mo |
| Free plan | Yes | Yes |
| Deployment | Cloud, hosted in US and EU regions | Cloud |
| Integrations | — | 100+ |
| Compliance | 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 | 24/7 email and live chat, Priority support on Professional, Phone support and dedicated success manager on Enterprise |
| Founded | 2010 | 2012 |
| Headquarters | — | Vilnius, Lithuania |
| Employees | 201–500 | 11–50 |
| Funding | Growth investment (Thoma Bravo) · $51M raised | Bootstrapped |
| Best for | Developers and engineering teams that need to send transactional and marketing email through an API | Small businesses, growing teams, creators and ecommerce brands |
Plans side by side
Mailgun
Free$0month
Basic$15month (10,000 emails included)
Foundation$35month (50,000 emails included)
Scale$90month (100,000 emails included)
EnterpriseCustomcustom
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
Mailgun
- recommended for sending larger volumes programmatically
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, “Mailgun vs Sender”, https://slateindex.ai/compare/mailgun-vs-sender, data of Nov 2, 2026. Licence: CC BY 4.0.