Customer.io vs Brevo (formerly Sendinblue)
Side-by-side from the Top 11 rankings of The 11 Best Marketing Automation Software (2026) and The 11 Best Email Marketing Software. Last verified June 7, 2026.
The short answer
Brevo (formerly Sendinblue) ranks higher on Top 11 (#3 vs #6) for Marketing managers choosing marketing automation platforms (HubSpot vs Marketo vs ActiveCampaign vs Klaviyo) / Small business owners and marketers choosing email marketing tools (Mailchimp alternatives). The best all-in-one platform, offering email, SMS, chat, and more with an incredibly generous free plan.
At a glance
| Customer.io | Brevo (formerly Sendinblue) | |
|---|---|---|
| Top 11 rank | #6 / The 11 Best Marketing Automation Software (2026) | #3 / The 11 Best Email Marketing Software |
| Score (out of 9.4) | 8.2 | 8.8 |
| Best for | Event-driven messaging for tech | All-in-one marketing suite |
| Pricing | $$ ($100 to $1,500/mo) | $ ($25 to $66+/mo) |
| HQ | Portland, USA | Paris, France |
| Founded | 2012 | 2012 |
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)
Brevo (formerly Sendinblue)
The best all-in-one platform, offering email, SMS, chat, and more with an incredibly generous free plan.
www.brevo.comMethodology and scoring weights live at /methodology. No vendor pays for placement — see about.