[UK] What’s the current landscape of recruitment software in the industry?

With over ten years of experience as a software developer, I’ve been involved in several bespoke projects for recruitment agencies.

I’m considering developing my own multi-tenant recruitment software that agencies can license, designed to support both temporary and permanent placements, complete with features like invoicing, bulk communication, and calendar management.

I’d like to understand the current state of recruitment software. Is there a strong demand for a comprehensive solution that can serve as the primary software for agencies or consultants? What are the prevalent licensed software options available today? Are there any leading companies that agencies typically rely on for their management systems?

I’m looking to evaluate whether this is a viable idea to pursue.