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Software · head to head

Customer.io vs Notion

Customer.io logo

Customer.io

Software

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

From
On request
Rated
-
Full reviewWebsite
Notion logo

Notion

Software

All-in-one workspace for notes, tasks, wikis, and databases

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Notion has a free tier, so it costs nothing to try first.
  • Each has a real cost: 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; Notion free plan limited to 1,000 blocks for 2+ member workspaces, restricting team usage

Where they differ

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

Attributes where Customer.io and Notion differ
AttributeCustomer.ioNotion
Starting priceOn requestFree
Pricing modelsubscriptionUnknown
Free tierNoYes
PlatformsWebWeb, iOS, Android
FoundedUnknown2016

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 Customer.io

Nothing recorded that Notion does not also cover.

Only in Notion

  • Rich text editing with blocks
  • Customizable databases
  • Kanban boards and calendars
  • Real-time collaboration
  • Template library
  • File attachments
  • Web clipper
  • API access

What people use each for

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

Customer.io

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

Notion

  • Project managementnot Customer.io
  • Knowledge base creationnot Customer.io
  • Note-taking and documentationnot Customer.io
  • Team collaborationnot Customer.io
  • Content planningnot Customer.io

Where each one falls short

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

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

Notion

  • Free plan limited to 1,000 blocks for 2+ member workspaces, restricting team usage
  • Free tier only includes trial AI capabilities; full Notion AI requires paid plan
  • Page history limited to 7 days on free plan
  • Per-member pricing increases costs for teams compared to flat-rate competitors
  • Limited automation capabilities compared to dedicated workflow platforms

Pricing, plan by plan

Customer.io

On request

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

Notion

Free
  • FreeFree
    • 1000 block limit (2+ members)
    • 7-day page history
    • 5MB file upload cap
  • Plus$10/month
    • Unlimited blocks
    • 30-day page history
    • Unlimited file uploads
  • Business$20/month
    • All Plus features
    • Notion Agent
    • AI Meeting Notes
  • Enterprise$null/custom
    • All Business features
    • Advanced controls
    • Audit logs

Which should you pick?

Choose Customer.io if

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

Customer.io review

Choose Notion if

  • You need rich text editing with blocks.
  • You want to start without paying.
  • You work on Web, iOS, Android.
  • You also want customizable databases.
Notion review

Questions people ask

Is Customer.io or Notion better?
Neither clearly leads. Customer.io starts at On request and Notion at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Customer.io or Notion?
Notion has a free tier; the other does not. Paid plans start at On request for Customer.io and Free for Notion.
Does Customer.io or Notion run on more platforms?
Customer.io runs on Web. Notion runs on Web, iOS, Android.
Can I use Notion for free?
Yes. Notion has a free tier, so you can try it without paying. Customer.io starts at On request.
What can Customer.io do that Notion cannot?
Notion covers Rich text editing with blocks, Customizable databases, Kanban boards and calendars, Real-time collaboration.

Answered from the vendors’ own pages

Notion: What are Notion's pricing tiers?

Notion offers four plans: Free ($0/member/month), Plus ($10/member/month), Business ($20/member/month recommended), and Enterprise (custom pricing). All paid plans include Notion AI and identical features with no per-feature charges.

Source
Notion: What is included in Notion's free plan?

The free plan includes databases with limited collaborative blocks, trial AI capabilities, basic forms, basic sites, Notion Calendar, and file uploads. For workspaces with 2+ members, there is a 1,000-block limit.

Source
Notion: How much does Notion AI cost?

Notion AI is included with Plus ($10/mo), Business ($20/mo), and Enterprise plans. Free and Plus plans include limited AI trial capabilities. Custom Agents cost $10 per 1,000 monthly credits after free trial.

Source
Notion: Can guests access Notion workspaces without payment?

Yes. Guests are free of charge on all plans including the free tier. Free tier allows 10 guests; paid plans include unlimited guests. Guests can only access individual pages they are invited to.

Source
Notion: Does Notion integrate with other apps?

Yes. Notion integrates with 100+ third-party apps including Slack, Google Drive, GitHub, Google Calendar, Trello, Jira, Zapier, and many others. Native integrations are available plus additional connections via Zapier.

Source
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Related pages

More on Customer.io

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