ActiveCampaign
As of 2021, they have over 145,000 clients in 170 countries and $165 million in recurring revenue. They raised $100 million in 2020 and $240 million in 2021. ActiveCampaign acquired Postmark, a transactional email delivery system, in May 2022. They have offices in Chicago, Indianapolis, Sydney, Dublin, and Florianópolis.