RAD tools for Windows and Linux come in a wide range of prices—commercial tools like RAD Studio (Delphi/C Builder) are premium and typically require paid licenses (exact prices can vary, but expect several hundred to a couple thousand dollars per year for professional editions), while others like RadSystems Studio are about $599/year per developer or $1,500 for a lifetime license.
Low-code RAD platforms like Microsoft Power Apps, OutSystems, and Mendix also have subscription-based pricing, often tailored to business needs and team sizes, and can get pricey for enterprise features.
On the other hand, Unity’s Personal edition is still totally free for individuals and small studios (under $200,000 in revenue), but Unity Pro is $2,200/year per seat as of 2025.
If you’re focused on classic business apps, specialized RAD tools might be worth the investment, but if you’re building games or interactive media—or just want a powerful, free option for smaller projects—Unity is a solid choice that covers a lot of ground (especially for cross-platform work).