Customer.io vs Notion
A detailed, side-by-side comparison of Customer.io and Notion. We compare features, pricing, ease of use, and value for money to help you make the right choice in 2026.
Reviewed by the Ikaroa team · Last updated: March 2026
Quick Verdict
Notion edges ahead overall with a rating of 4.4/5. However, Customer.io (4.3/5) may be the better fit if you prioritise SaaS and product-led teams wanting event-driven, behaviour-based marketing automation. Read on for the full breakdown.
Customer.io vs Notion at a Glance
Customer.io
★ 4.3Customer.io is a marketing automation platform built for tech-savvy teams. It excels at event-driven messaging, allowing you to trigger emails, push notifications, SMS, and in-app messages based on user behaviour. Popular with SaaS companies and product-led growth teams for its flexibility and developer-friendly approach.
Starting from: £79/month
Best for: SaaS and product-led teams wanting event-driven, behaviour-based marketing automation
Read full review →Notion
★ 4.4Notion is a flexible workspace for notes, wikis, and databases. While not a traditional CRM, many teams build custom CRM systems using its database features.
Starting from: £0/month
Best for: Teams wanting a flexible workspace that can be moulded into a custom CRM
Read full review →Customer.io vs Notion Feature Comparison
Here is how Customer.io and Notion compare across the features that matter most. We have tested both platforms extensively across client implementations.
| Feature | Customer.io | Notion |
|---|---|---|
| Free Plan Available | No | Yes |
| Starting Price | £79/month | £0/month |
| Best For | SaaS and product-led teams wanting event-driven, behaviour-based marketing automation | Teams wanting a flexible workspace that can be moulded into a custom CRM |
| Our Rating | 4.3/5 | 4.4/5 |
| Mobile App | Limited | Yes |
| Email Marketing | Yes | No |
| Automation | Limited | Limited |
| Reporting | Basic | Basic |
| Integrations | Limited | Extensive |
| API Access | Yes | Yes |
| Ikaroa Exclusive Discount | N/A | N/A |
Customer.io vs Notion Pricing
Pricing is often the deciding factor. Here is a full breakdown of what each platform charges at every tier:
Customer.io Pricing
Essentials
£79/month
- ✓5,000 profiles
- ✓Email & in-app messages
- ✓Segmentation
- ✓Workflows
Premium
£950/month
- ✓Unlimited profiles
- ✓All channels
- ✓Custom objects
- ✓Dedicated success manager
Enterprise
Custom
- ✓Everything in Premium
- ✓SLA
- ✓HIPAA compliance
- ✓Custom implementation
Notion Pricing
Free
£0/month
- ✓Unlimited pages
- ✓7-day page history
- ✓10 guests
Plus
£7/user/month
- ✓Everything in Free
- ✓Unlimited file uploads
- ✓30-day page history
- ✓100 guests
Business
£12/user/month
- ✓Everything in Plus
- ✓SAML SSO
- ✓90-day page history
- ✓250 guests
Enterprise
Custom
- ✓Everything in Business
- ✓Advanced security
- ✓Audit log
- ✓Unlimited page history
Not sure which to pick?
Our team has implemented both Customer.io and Notion for clients. We can help you decide based on your specific needs.
Customer.io Pros and Cons
✓Pros
- •Excellent event-driven automation
- •Very flexible and developer-friendly
- •Strong segmentation capabilities
- •Multi-channel messaging
- •Good documentation and API
✗Cons
- •Requires technical knowledge to maximise
- •Expensive for smaller teams
- •No built-in CRM
- •Steep learning curve for non-technical users
- •UI could be more intuitive
Notion Pros and Cons
✓Pros
- •Extremely flexible and customisable
- •Beautiful, clean interface
- •Combine docs, databases, and wikis
- •Active template community
- •Good free plan
✗Cons
- •Not a dedicated CRM (requires building your own)
- •No automation without third-party tools
- •No email integration by default
- •Can become slow with large databases
- •Learning curve for advanced features
Our Verdict: Customer.io vs Notion
Both Customer.io and Notion are solid options, but they serve different needs. Having implemented both for multiple clients, here is our recommendation:
Choose Customer.io if you need SaaS and product-led teams wanting event-driven, behaviour-based marketing automation. With a starting price of £79/month and a rating of 4.3/5, it offers excellent event-driven automation.
Choose Notion if you need Teams wanting a flexible workspace that can be moulded into a custom CRM. Starting at £0/month with a 4.4/5 rating, it excels at extremely flexible and customisable.
Still not sure? Talk to the Ikaroa team. We have helped hundreds of businesses make this exact decision, and we are happy to point you in the right direction.
🎁 Get either product at a discount through Ikaroa Partners
Consider Open Doors Instead
Why choose between Customer.io and Notion? Open Doors gives you the best features of both in one platform, for less. It is an all-in-one CRM with email marketing, SMS, funnels, booking, invoicing, automation, and more, starting at just £97/month with unlimited contacts.
Need implementation help?
Ikaroa can set up Customer.io or Notion for your business, migrate your data, and train your team. We have done it dozens of times.
Free consultation. No obligation.