Customer.io vs OneSignal
Updated June 2026 · A structured head-to-head comparison.
Automated messaging based on real-time data.
The verdict
Both Customer.io and OneSignal are credible marketing automation tools, and the right pick comes down to your priorities.
Choose Customer.io if you want a longer free trial (14 days). Automated messaging based on real-time data.
Choose OneSignal if you'd rather have a lower starting price (free – $9/mo), a free plan to start on and broader platform coverage. Push, email, and SMS messaging.
Customer.io vs OneSignal: side by side
| Dimension | Customer.io | OneSignal |
|---|---|---|
| Starting price | From $100/mo | Free – $9/moWinner |
| Free plan | No | YesWinner |
| Free trial | 14 daysWinner | — |
| Pricing model | Subscription | Freemium |
| Best for | Saas, Product Teams | App Developers, Marketers |
| Platforms | Web, Api | Web, Ios, Android, ApiWinner |
| Rating | 4.4/5 | 4.5/5 |
Customer.io key facts
- Vendor
- Customer.io
- Pricing
- Subscription — From $100/mo
- Free tier
- Free trial (14 days)
- Platforms
- Web, Api
- Best for
- Saas, Product Teams
- Editor rating
- 4.4 / 5
- Founded
- 2012
- Headquarters
- Portland, OR, USA
OneSignal key facts
- Vendor
- OneSignal
- Pricing
- Freemium — Free – $9/mo
- Free tier
- Yes
- Platforms
- Web, Ios, Android, Api
- Best for
- App Developers, Marketers
- Editor rating
- 4.5 / 5
- Founded
- 2014
- Headquarters
- San Mateo, CA, USA
Frequently asked questions
Is Customer.io better than OneSignal?
Neither is universally better — OneSignal edges ahead on overall rating, but the best choice depends on price, platforms, and your use case. See the side-by-side table above.
Is Customer.io or OneSignal cheaper?
OneSignal is the more affordable of the two to get started, at free – $9/mo. Customer.io starts at from $100/mo; OneSignal starts at free – $9/mo.
Can Customer.io replace OneSignal?
Yes for most teams — both are marketing automation tools with heavily overlapping features. The main trade-offs are pricing and platform support, covered in the comparison above.