I'd previously posted a review which was removed from Glassdoor. It seems all reviews prior to the name change from Calyx to Perceptive have been removed from this company page.
Calyx as it was when I worked there was dreadful. A completely out of touch C-suite who would constantly pat their own backs and not be honest with their employees. The day after Calyx's acquisition by a venture capital firm was announced on a townhall, I was brought into a meeting with my manager and department head and let go for business reasons, told to log off immediately and not come back. I also have written confirmation from them after going through ACAS that they didn't follow the full legal process to let me go, as I wasn't allowed anyone from my union in my meeting with management.
Salary was poor compared to the market. Upper management also wanted nothing to do with process improvements. Systems were old, complicated and there were no frameworks on how departments should interact with eachother. It was a free for all which led to delays on project deliverables.