OneSignal vs Customer.io
Side-by-side from the Top 11 rankings of The 11 Best Mobile Marketing Software Platforms (2026) and The 11 Best Marketing Automation Software (2026). Last verified July 7, 2026.
The short answer
Customer.io ranks higher on Top 11 (#6 vs #7) for Mobile growth and lifecycle marketers choosing app engagement platforms / Marketing managers choosing marketing automation platforms (HubSpot vs Marketo vs ActiveCampaign vs Klaviyo). A flexible, API-first platform for tech companies to automate messaging based on user behavior.
At a glance
| OneSignal | Customer.io | |
|---|---|---|
| Top 11 rank | #7 / The 11 Best Mobile Marketing Software Platforms (2026) | #6 / The 11 Best Marketing Automation Software (2026) |
| Score (out of 9.4) | 8 | 8.2 |
| Best for | Best free-tier push for lean teams | Event-driven messaging for tech |
| Pricing | $ ($0 to custom/mo) | $$ ($100 to $1,500/mo) |
| HQ | San Mateo, USA | Portland, USA |
| Founded | 2014 | 2012 |
OneSignal
Reliable high-volume push with a free tier and a light SDK.
onesignal.comSee full entry in The 11 Best Mobile Marketing Software Platforms (2026)
Customer.io
A flexible, API-first platform for tech companies to automate messaging based on user behavior.
customer.ioSee full entry in The 11 Best Marketing Automation Software (2026)
Methodology and scoring weights live at /methodology. No vendor pays for placement — see about.