Ramon Berrios did not start Castmagic to chase the AI hype. He and his co-founders were already running a podcast, the DTC Pod, and kept hitting the same wall every week: turning a single long recording into show notes, summaries, and social posts ate hours of manual work. They built a tool to handle that grind for themselves, then realized every other creator they knew had the exact same problem.

Castmagic launched in early 2023 as a way to drop in an audio or video file and get back publish-ready content: transcripts, summaries, timestamps, quotes, and posts shaped for different platforms. Because Ramon already had an audience from the podcast and from building in public on X, the first paying users showed up fast. The team kept the focus narrow at the start, podcasters first, and improved the quality of the AI output before widening to a broader creator market.

The growth jump came from an AppSumo launch. Selling lifetime access on the marketplace brought in a large slug of cash and roughly ten thousand new users in a short window, which gave the team both runway and a flood of feedback to act on. They paired that with creator partnerships, some paid and some run as affiliate deals, so the product reached audiences that already trusted the person recommending it.

Throughout the run the founders stayed disciplined about money. They watched their spend on language models and transcription closely and kept marketing under a fifth of revenue, which let the business stay profitable while it grew. In his own Indie Hackers post in July 2024, Ramon said they had reached $1M ARR in under nine months with zero capital raised.

What makes the story useful for other founders is how ordinary the starting point was. There was no proprietary model and no funding round. There was a real workflow the founders hated, an audience that felt the same pain, and a marketplace launch that turned early interest into cash and users at once.