I've been through something very similar with Mailgun. Mailgun was acquired by Rackspace in 2012. «Rackspace will make Mailgun available to its Rackspace Hosting customers for integrating cloud-based email services into applications and websites» Up until the acquisition, Mailgun was a solid product with a core set of features, i.e., an «API for creating and managing online email inboxes for apps and websites». And then it grew, and grew and grew. In my own view it tried to do too much which inevitably meant pricing changes for its customers.

SendGrid started off similarly, very early on it was named smtpapi.com. The focus was on the API, developers, UX, etc. I keep getting reach out emails from Twilio these days trying to upsell me on all the amazing "new" SendGrid features they have in 2022 (of which I need exactly none).

I don't have high hopes for Postmark's acquisition. ActiveCampaign will start "integrating", then comes the raft of new features, products, solutions. Today's Postmark does very little of what the competition tries to offer. At some point I'm already preparing myself for the inevitable price change ^^.

All in all, good pay day for the founders after 12 years of bootstrapping, not much to celebrate as a customer.