FreeScout runs on a completely ordinary LAMP-style stack — PHP, a database, a web server. If you have ever installed WordPress, you already have every skill you need, and honestly this is simpler than a lot of WordPress setups I have untangled. I have had FreeScout instances just sit there and work, month after month, asking for nothing.
FreeScout has a whole catalog of extensions — modules for things like an API and webhooks, time tracking, a Kanban board, satisfaction ratings, WhatsApp and Telegram channels, and plenty more. You only install the ones you need. And every one of them is a one-time purchase. You pay once, you own it, it keeps working. There is no monthly fee quietly draining your account for a feature you bought two years ago.