Constant Contact vs Customer.io vs Klaviyo
| Attribute | |||
|---|---|---|---|
| Category | Email Marketing | Marketing | Email & Messaging Marketing |
| Pricing | Paid | Paid | Free tier |
| Starting price | $12/month | $100/month | $20/month |
| Free tier | No | No | Yes |
| Free trial | Yes | Yes | No |
| Deployment | Cloud | Cloud | — |
| API available | Unknown | Unknown | Yes |
| Platforms | — | — | — |
| Certifications | — | — | 4 |
| Integrations | — | — | 2 |
| Company | Founded 1995 | — | Founded 2012 |
| Feature attributes | |||
| Sso Saml | — Unknown | — Unknown | ✓ Yes |
| Rbac | — Unknown | — Unknown | — Unknown |
| Mobile App | — Unknown | — Unknown | — Unknown |
| Webhooks | — Unknown | — Unknown | ✓ Yes |
| Data Export | — Unknown | — Unknown | ✓ Yes |
| Email Automation | — Unknown | — Unknown | — Unknown |
| Sms Marketing | — Unknown | — Unknown | ✓ Yes |
| Templates | — Unknown | — Unknown | ✓ Yes |
| Segmentation | — Unknown | — Unknown | ✓ Yes |
| Deliverability Tools | — Unknown | — Unknown | ✓ Yes |
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Unknown values show as “Unknown”/“—”. Nothing is inferred — see each tool page for sources.