Softwr

Software · head to head

AdBlock Plus vs Customer.io

AdBlock Plus logo

AdBlock Plus

Software

The world's most popular ad blocker

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 AdBlock Plus has a free tier, so it costs nothing to try first.
  • Each has a real cost: AdBlock Plus acceptable Ads allowlist model generates controversy over ad filtering conflicts of interest; 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 AdBlock Plus and Customer.io actually diverge.

Attributes where AdBlock Plus and Customer.io differ
AttributeAdBlock PlusCustomer.io
Starting priceFreeOn request
Pricing modelfreesubscription
Free tierYesNo
PlatformsChrome, Edge, Firefox, Opera, Safari, Yandex BrowserWeb
Founded2006Unknown

Identical on both: 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 AdBlock Plus

  • Ad blocking
  • Acceptable Ads
  • Custom filters
  • Social media blocking
  • Chrome support
  • Firefox support
  • Edge support
  • Safari support

Only in Customer.io

Nothing recorded that AdBlock Plus does not also cover.

Where each one falls short

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

AdBlock Plus

  • Acceptable Ads allowlist model generates controversy over ad filtering conflicts of interest
  • Smaller feature set compared to open-source alternatives like uBlock Origin
  • Less customization and dynamic filtering compared to uBlock Origin
  • Mobile version less comprehensive than desktop extension
  • Chrome version increasingly limited due to Manifest V3 migration

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

AdBlock Plus

Free
  • FreeFree
    • Ad blocking
    • Acceptable Ads option
    • Custom filters

Customer.io

On request

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

Which should you pick?

Choose AdBlock Plus if

  • You need ad blocking.
  • You want to start without paying.
  • You work on Chrome, Edge, Firefox, Opera, Safari, Yandex Browser.
  • You also want acceptable ads.
AdBlock Plus review

Choose Customer.io if

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

Customer.io review

Questions people ask

Is AdBlock Plus or Customer.io better?
Neither clearly leads. AdBlock Plus 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, AdBlock Plus or Customer.io?
AdBlock Plus has a free tier; the other does not. Paid plans start at Free for AdBlock Plus and On request for Customer.io.
Does AdBlock Plus or Customer.io run on more platforms?
AdBlock Plus runs on Chrome, Edge, Firefox, Opera, Safari, Yandex Browser. Customer.io runs on Web.
Can I use AdBlock Plus for free?
Yes. AdBlock Plus has a free tier, so you can try it without paying. Customer.io starts at On request.
What can AdBlock Plus do that Customer.io cannot?
AdBlock Plus covers Ad blocking, Acceptable Ads, Custom filters, Social media blocking.

Answered from the vendors’ own pages

AdBlock Plus: What does Adblock Plus block?

Adblock Plus blocks banner ads, pre-roll and mid-roll video ads on YouTube, pop-ups, sidebar ads, and most standard display formats. With Acceptable Ads disabled and EasyPrivacy enabled, it achieved a 100/100 score on AdBlock Tester in April 2026.

Source
AdBlock Plus: What browsers does Adblock Plus support?

Adblock Plus is available for Chrome, Edge, Firefox, Opera, Safari, and Yandex Browser.

Source
AdBlock Plus: Is there a premium version of Adblock Plus?

Yes. Adblock Plus Premium costs $40 annually or $4 per month and allows users to block cookie consent pop-ups, while the free version includes core ad blocking.

Source
AdBlock Plus: What is Acceptable Ads?

Acceptable Ads is an opt-in setting that allows advertising Adblock Plus deems unobtrusive to display on websites; it is disabled by default but can be toggled in Settings.

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Related pages

More on AdBlock Plus

More on Customer.io

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