https://techcrunch.com/2023/04/28/battle-of-two-marketing-companies/

It isn’t often that startup rivals battle in plain view of others, but such is the case with the mobile messaging services provider Postscript, which took to the Twitterverse earlier this month after receiving a cease-and-desist letter from competitor Attentive.

Attentive’s letter was in response to a client case study that Postscript had authored and posted on its website about nutrition company BUBS Natural, which said BUBS Natural left Attentive for Postscript after finding its list actually shrinking instead of growing, then battling with the company to move its list off its platform.