https://techcrunch.com/2021/05/18/klaviyo-series-d/

Email marketing is decades old, but it’s a category that has surprising life in it. Multiple generations of email marketing companies have come through and sustained success, from Constant Contact to Mailchimp. These brands often become household names — after all, you probably have hundreds of emails with their logos attached to the email footer.

Klaviyo is not as much of a household name right now, but it is absolutely on its way to the paramount of the next-generation of email marketing startups.