Why can a solo founder now do what needed an agency?

Because every line an agency billed for has collapsed into software: video models replace the shoot, avatars and voice clones replace talent, image models replace the studio, and AI editors replace post-production, all for tens of dollars a month. The proof points are real: a national TV ad made solo in three days for $2,000, and creators like Varun Mayya shipping 1,000+ videos a month with a tiny team. The constraint has moved from budget to taste; ideas, scripts, and judgment are now the scarce inputs, which is exactly where a founder has the advantage.

A quick orientation. The real value is below: resources worth your time, from people who've actually done it.