Can you permanently buy After Effects?

Excuse me, but I have a question about After Effects. I've been considering purchasing it for some time now, but I'm unsure if it's a one-time purchase or if it requires ongoing payments. Can you clarify for me whether it's possible to permanently buy After Effects, or if it's a subscription-based service that I'd have to keep renewing? I'd appreciate any information you can provide on this matter. Thank you in advance.