Hey guys, I work in a startup as a

Hey guys, I work in a startup as a backend developer, and we're not currently using the cloud to host our apps. The problem is that we're taking so many SSH brute force attacks that a few days ago our server stopped responding for a few hours. I recommended using Cloudlfare for these types of DOS and DDOS attacks and also mentioned other cool features like CDN and all to my manager. He liked the idea a lot and started using Cloudflare for one of his personal websites to test Cloudflare.  My question is about pricing. For now, we're not planning to use any services from Cloudflare but DDOS protection, DNS, and CDN. Do we have to go professional or enterprise, or is it okay to keep using personal plan?