Softwr

Marketing · head to head

Convert vs Customer.io

Convert logo

Convert

Marketing

A/B testing platform for enterprises

From
Free
Rated
-
Full reviewWebsite
Customer.io logo

Customer.io

Marketing

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

From
$15/month
Rated
-
Full reviewWebsite

The short version

  • Only Convert has a free tier, so it costs nothing to try first.
  • Each has a real cost: Convert pricing is driven by monthly tested users, starting at $399 per month for 100,000 monthly tested users on Growth and $599 on Pro; 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
  • Prices and features above were last checked on 2 September 2026.

Where they differ

Only the attributes on which Convert and Customer.io actually diverge.

Attributes where Convert and Customer.io differ
AttributeConvertCustomer.io
Starting priceFree$15/month
Free tierYesNo
Founded2012Unknown

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

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 Convert

  • A/B testing
  • Multivariate testing
  • Analytics
  • API access
  • Google Analytics
  • SSL encryption
  • Cloud deployment
  • Web support

Only in Customer.io

Nothing recorded that Convert does not also cover.

What people use each for

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

Convert

  • A/B and multivariate testing for conversion optimizationnot Customer.io
  • Full-stack experimentation on web and mobilenot Customer.io
  • Sequential testing and statistical confidence trackingnot Customer.io

Customer.io

  • Orchestrating multi-channel customer journeys from signup to retentionnot Convert
  • Personalizing email and SMS campaigns using customer profilesnot Convert
  • Triggering automated messages based on user behaviornot Convert
  • Coordinating cross-team messaging without rebuilding campaignsnot Convert

Where each one falls short

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

Convert

  • Pricing is driven by monthly tested users, starting at $399 per month for 100,000 monthly tested users on Growth and $599 on Pro
  • Single Sign-On requires the Pro plan at $599 per month
  • Multivariate testing, multi-page testing, full stack and feature flags, sequential testing and raw test data export are all withheld from the Growth plan
  • Phone support, change history and guided onboarding require Pro
  • The advertised $299 and $420 per month rates require paying the full year up front at $3,588 or $5,040
  • The Enterprise plan is price on request, is only available as an annual plan, and its data segregation feature carries additional costs
  • Listed prices exclude VAT, GST and other taxes, which are added at checkout
  • Above 5 million monthly tested users there is no published rate

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

Convert

Free
  • Growth$399/month
  • Pro$599/month
  • Enterprise$undefined/mo

Customer.io

$15/month
  • Essentials$15/month
    • Base profiles starting at 5,000
    • Email sends: 1 million monthly
    • Community and email support
  • Standard$null/month
    • Mid-tier scaling across channels
    • Higher profile and email allowances
    • Email and priority support
  • Premium$null/month
    • Advanced custom workflows
    • Dedicated support
  • Enterprise$null/month
    • Custom pricing for dedicated infrastructure
    • HIPAA compliance
    • Dedicated hardware

Which should you pick?

Choose Convert if

  • You need a/b testing.
  • You want to start without paying.
  • You also want multivariate testing.
Convert review

Choose Customer.io if

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

Customer.io review

Questions people ask

Is Convert or Customer.io better?
Neither clearly leads. Convert starts at Free and Customer.io at $15/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Convert or Customer.io?
Convert has a free tier; the other does not. Paid plans start at Free for Convert and $15/month for Customer.io.
Does Convert or Customer.io run on more platforms?
Both run on Web, so platform support will not decide this one for you.
Can I use Convert for free?
Yes. Convert has a free tier, so you can try it without paying. Customer.io starts at $15/month.
What is Convert best used for?
Convert is most often used for a/b and multivariate testing for conversion optimization, full-stack experimentation on web and mobile, sequential testing and statistical confidence tracking. Of those, a/b and multivariate testing for conversion optimization and full-stack experimentation on web and mobile are not what Customer.io is typically brought in for.
What can Convert do that Customer.io cannot?
Convert covers A/B testing, Multivariate testing, Analytics, API access.

Answered from the vendors’ own pages

Convert: What is the starting price for Convert?

The Growth plan starts at $399/month (or $299/month billed annually for 25% savings) with 100K monthly tested users, 5 projects, and 5 active experiences per project.

Source
Customer.io: How much does Customer.io Essentials cost?

Customer.io Essentials starts at $15/month and includes 5,000 base profiles with 1 million monthly email sends, community and email support, and data-driven messaging tools. Customers can choose monthly or annual billing.

Source
Convert: What is the difference between Growth and Pro plans?

Both cap at 100K tested users/month, but Pro ($599/month or $420/month annual) adds 30 active projects (vs 5), unlimited experiences per project (vs 5), unlimited domains (vs 10), multivariate testing, full-stack testing, sequential testing, and phone support.

Source
Customer.io: What are Customer.io's usage-based add-on costs?

Beyond plan limits, Customer.io charges $0.009 per additional profile, $0.12 per 1,000 additional emails, and $10 per 100K AI credits. Messages exceeding plan limits are charged at nominal rates. Billing occurs on the subscription anniversary.

Source
Convert: How much does the Enterprise plan cost?

Enterprise pricing is available 'on request.' It supports 1M+ monthly tested users (12M+ annually), unlimited projects, experiences, and domains, plus dedicated account manager and custom terms.

Source
Customer.io: Does Customer.io offer a startup discount?

Yes, early-stage companies that have raised under $10 million qualify for a full year free through Customer.io's Startup Program with annual billing.

Source
Convert: What is the cost to exceed my monthly tested user limit?

Growth overages cost $399 per 100K additional users. Pro/Enterprise overages cost $699 per 250K additional users. Customers can also upgrade mid-cycle at any time.

Source
Share

Related pages

More on Convert

More on Customer.io

Keep looking

Other head to heads