Head to head
Customer.io vs Constant Contact
Both platforms are scored with the same methodology and the same category rubric. Nothing on this page is influenced by advertising.
52/100Higher score | 41/100 | |
|---|---|---|
| Category rank | #3 | #8 |
| Confidence | High confidence | High confidence |
| External Reputation | 70 | 82 |
| AI Authority | 29 | 5 |
| Web Authority | 43 | 9 |
| Expert Assessment | 65 | 60 |
| TOP10 User Score | — | — |
| Pricing | Essentials from $100/month, billed monthly (5,000 profiles, 1M emails/month) · free tier: No free-forever plan; companies that have raised under $10M can get a full year free via the startup program. No trial length published. | $12/mo (Lite, monthly) or $10.20/mo billed annually, at 500 contacts · free tier: Free trial, no credit card required; 30-day money-back guarantee. A permanent free plan was not verified on the vendor site. |
| Pricing model | Subscription with usage-based overages | Subscription (contact-count tiered, with add-ons and per-email overage) |
| Best for | Funded SaaS or mobile product companies with 5k–100k profiles and engineering resource to send event data, who need email coordinated with push, in-app and SMS in one journey — especially startups eligible for the under-$10M free year. | US-based small businesses, nonprofits, associations, churches, real estate agents and event organisers that want email plus social and event registration in one place, value phone and 1:1 onboarding support over deep automation, and have a list small enough that contact-tier pricing stays modest. |
| Avoid if | You want cheap newsletters, forms or landing pages, have no developer support for setup, sit on a large dormant B2C list you will still be billed for, need month-to-month flexibility above $100/month, or require phone-based billing escalation. | You are outside the US and want SMS, need real automation or segmentation on the cheapest plan, hold a large list you email infrequently, need 5+ accounts with a published comparable price, or expect inbox/deliverability preview included rather than as a recurring $10 add-on. |
| Markets | SMB, Mid-Market, Enterprise, Startups, Product-led SaaS, Mobile apps, B2C | SMB, Nonprofit, Agencies, Multi-location teams, Higher education, Real estate, State & local government, Franchises |
| Founded | 2012 | — |
| Headquarters | United States | Waltham, Massachusetts, United States |
A higher TOP SCORE means more of the evidence favours that platform on this methodology — it is not a recommendation, and it does not account for your specific requirements. Advertisers are never declared the winner of a comparison.