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Software · head to head

Constant Contact vs Customer.io

Constant Contact logo

Constant Contact

Software

Email marketing and event management

From
Free
Rated
-
Full reviewWebsite
Customer.io logo

Customer.io

Software

Data-driven messaging for teams getting started, scaling and beyond

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Constant Contact has a free tier, so it costs nothing to try first.
  • Each has a real cost: Constant Contact core plan started at $9.99 per month and Plus plan at $45 per month, both scaling by contact list size rather than a flat rate (Internet Archive capture, 2022); Customer.io essentials plan caps at 5,000 profiles (people and objects) and 1,000,000 monthly emails, with overages billed at $0.12 per 1,000 emails beyond that

Where they differ

Only the attributes on which Constant Contact and Customer.io actually diverge.

Attributes where Constant Contact and Customer.io differ
AttributeConstant ContactCustomer.io
Starting priceFreeOn request
Free tierYesNo
PlatformsWeb, Mobile-responsiveWeb
Founded1995Unknown

Identical on both: pricing model (subscription), user rating (Not yet rated), category (Unknown).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Constant Contact

  • Email marketing
  • Event management
  • Contact management
  • Automation
  • Analytics
  • Salesforce
  • Zapier
  • Google Analytics

Only in Customer.io

Nothing recorded that Constant Contact does not also cover.

What people use each for

The jobs each tool is most often brought in to do.

Constant Contact

  • Business operationsnot Customer.io
  • Productivitynot Customer.io
  • Automationnot Customer.io

Customer.io

No use cases recorded yet. See the Customer.io review.

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Constant Contact

  • Core plan started at $9.99 per month and Plus plan at $45 per month, both scaling by contact list size rather than a flat rate (Internet Archive capture, 2022)

Customer.io

  • Essentials plan caps at 5,000 profiles (people and objects) and 1,000,000 monthly emails, with overages billed at $0.12 per 1,000 emails beyond that
  • Standard and Premium tiers show custom pricing only, and Enterprise is negotiated rate, so three of the four published tiers require a sales conversation
  • Monthly plans accept credit card only; annual billing via invoice (ACH/wire) requires the annual commitment

Pricing, plan by plan

Constant Contact

Free
  • FreeFree
    • Basic email marketing
    • Contacts up to 100
  • Plus$45/month
    • Advanced features
    • Event management
    • Automation

Customer.io

On request

No published plan breakdown. See the Customer.io review.

Which should you pick?

Choose Constant Contact if

  • You need email marketing.
  • You want to start without paying.
  • You work on Web, Mobile-responsive.
  • You also want event management.
Constant Contact review

Choose Customer.io if

Nothing in the data separates Customer.io from Constant Contact on the points above - pick on price and on how each one feels to use.

Customer.io review

Questions people ask

Is Constant Contact or Customer.io better?
Neither clearly leads. Constant Contact starts at Free and Customer.io at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Constant Contact or Customer.io?
Constant Contact has a free tier; the other does not. Paid plans start at Free for Constant Contact and On request for Customer.io.
Does Constant Contact or Customer.io run on more platforms?
Constant Contact runs on Web, Mobile-responsive. Customer.io runs on Web.
Can I use Constant Contact for free?
Yes. Constant Contact has a free tier, so you can try it without paying. Customer.io starts at On request.
What is Constant Contact best used for?
Constant Contact is most often used for business operations, productivity, automation. Of those, business operations and productivity are not what Customer.io is typically brought in for.
What can Constant Contact do that Customer.io cannot?
Constant Contact covers Email marketing, Event management, Contact management, Automation.
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Related pages

More on Constant Contact

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