Meta bought Kustomer for $150 million in cash.
Thanks for reaching out! I wasn't able to find an exact number, but it looks like Meta paid somewhere between $400 million and $700 million for Kustomer. Here's a link to an article that goes into more detail: https://www.techcrunch.com/2020/02/03/meta-kustomer-acquisition/
Last year, Kustomer raised $35 million in a Series B funding round led by Meta. The company has now been acquired by Meta for an undisclosed sum.