If you need an authentic analog sound but have a zero-dollar budget, the open-source and free plugin community offers incredible tools that rival commercial synths:

Investing in legal software ensures you get stable performance, lifetime updates, and clean software that protects your creative work.

U-he offers a generous, fully functional demo of Diva on their official website. The only limitation is a mild crackle sound played at regular intervals. You can use it to test the synth in your tracks for as long as you want.