firewall centralized management solution

Hello Fortinet Community,

I’m currently looking for a solution that can manage multiple firewall vendors, including Fortinet, and others. My goal is to streamline firewall policy management across different platforms from a single console. Unfortunately, I can't purchase FortiManager or Panorama as I don't have the budget for either of them. Does anyone have any recommendations or insights on tools or platforms that can handle this multi-vendor management effectively?

Thank you in advance for your suggestions!