Neural DSP doesn’t give away a forever-free amp sim, but their unrestricted trial model is arguably better. You get the real product, not a crippled demo. And for many players, those 14 days are enough to become paying customers for life.
At first glance, Neural DSP doesn’t offer a "forever free" amp sim like some competitors (e.g., Amplitube Custom Shop or Guitar Rig 7 Player). Instead, they’ve engineered a freemium strategy around fully functional, time-unlimited trials that are so good, guitarists happily pay. neural dsp free