I think most AI companies do exactly what you suggest. Must have a quite generous free tier.

I’ve been building an AI podcast player for myself with Replit that auto-generates a summary, highlights, frameworks discussed and books and people mentioned.

I just have the free tier, so I have to wait from time to time for credits to reset, but I’m amazed by what it can do now.

Another one is Manus AI. Also really capable and quite generous free tier.