Constant ContactTools to simplify and amplify digital marketing for small businesses
vs
MailgunTransactional Email API Service For Developers
Comparison · Email Marketing · weekly run Nov 2
Constant Contact vs Mailgun
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
Constant Contact is the stronger AI pick in Email Marketing: it has a visibility score of 18.9 versus 0.9 for Mailgun.
Choose Constant Contact if…
- You want the brand AI engines rank higher (18.9 vs 0.9)
- AI answers describe it more positively (33% vs 0% positive)
- You prefer a larger, established vendor (1,001–5,000 employees)
- best for small businesses
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 | Constant Contact | Mailgun |
|---|---|---|
| Visibility score | 18.9% | 0.9% |
| Change vs last week | New | New |
| Rank in Email Marketing | #8 | #36 |
| Share of voice | 5.1% | 0.2% |
| Mentions this run | 26 | 1 |
| Positive in AI answers | 33% | 0% |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
Constant Contact 0pp · Mailgun 0pp over 0 weekly runs.
Engine by engine
Constant Contact leads on 3 of 3 engines
ChatGPT
AI Mode
Perplexity
Constant ContactMailgun
Head to head in AI answers
0 engine answers name both brands
0Constant Contact ranked higher
0Mailgun ranked higher
Features, pricing & fit
| Dimension | Constant Contact | Mailgun |
|---|---|---|
| Pricing model | — | Usage-based |
| Entry price | — | Free; paid from $15 / mo |
| Free plan | — | Yes |
| Deployment | Cloud-based | Cloud, hosted in US and EU regions |
| 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 |
| Founded | 1996 | 2010 |
| Headquarters | Waltham, Massachusetts, USA | — |
| Employees | 1,001–5,000 | 201–500 |
| Funding | Funding round led by Clearlake-managed vehicle Icon Partners VI (amount not disclosed) | Growth investment (Thoma Bravo) · $51M raised |
| Best for | Small businesses and nonprofits | Developers and engineering teams that need to send transactional and marketing email through an API |
Plans side by side
Constant Contact
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
Constant Contact
- best for small businesses
- simple email campaigns for small businesses
- saves money with annual prepay discounts
- accessible campaign creation, automation and social tools
- best for nonprofits and events
Mailgun
- recommended for sending larger volumes programmatically
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “Constant Contact vs Mailgun”, https://slateindex.ai/compare/constant-contact-vs-mailgun, data of Nov 2, 2026. Licence: CC BY 4.0.