# Customer.io reaches USD 20 million ARR in 2021/3

On 2021/5/20, Sacra published research based on company data, saying Customer.io had approximately USD 1.67 million monthly recurring revenue and approximately USD 20 million annual recurring revenue as of 2021/3. Its later 2021 equity crowdfunding materials confirmed it crossed the milestone in month 3.



Canonical: https://uniquebase.ai/news/d4b87cd6-9faf-4067-a483-b62e2e1a37ec
Stable identifier: d4b87cd6-9faf-4067-a483-b62e2e1a37ec
Snapshot captured: 2026-10-15T14:23:27.067Z
English updated: 2026-10-16T00:09:18.030Z

## Connected profiles

- [Customer.io](/companies/customer-io)

## Sources

- https://sacra.com/research/customer-io-the-hubspot-of-product-led-growth/