Castmagic Review: AI Content Repurposing Tool Worth It?

I have a folder on my desktop I call “the content graveyard.” It’s where good ideas go to die. It’s full of podcast interviews I was proud of and video recordings I swore I’d mine for gold. Staring at them, knowing the hours of transcription and editing they represent… it’s just soul-crushing.

So when I hear about a tool like Castmagic claiming it can automate that whole nightmare, my BS detector goes off immediately. I’ve been burned by “one-click” solutions before. But I had to see for myself.

And my first test was a complete disaster. I threw a 90-minute recording of a three-person brainstorm session at it—people talking over each other, no clear agenda, bad mics. What came out was pure chaos. An unreadable transcript that led to gibberish “summaries.” I almost wrote the whole tool off right there. A total waste of time.

But I gave it a second chance with a clean, structured webinar recording. And the difference was staggering. That’s the whole trick with this thing. Not magic—structure. Plain and simple.

What is this thing, anyway?

You feed it an audio or video file. The AI transcribes it, and while it does, it tries to map out your conversation, picking out speakers, topics, questions… all the signposts. From that map, it generates drafts for your blog, newsletter, tweets, LinkedIn posts—the whole nine yards.

It doesn’t just yank random quotes—it tries to piece together an actual story out of your episode. The result is a pile of drafts that, while needing your voice, aren’t staring at you from a terrifyingly blank page.

The few buttons I actually ended up using

The dashboard has a lot going on, but you can ignore most of it. My entire workflow eventually came down to a couple of things that consistently delivered.

Magic Chat. Seriously.

This is the feature that saved it for me. Instead of just taking what the AI gave me, I could give it direct orders. “Take the section from 12:45 to 18:00 and turn it into a LinkedIn post about overcoming project failure.” Or, “List every question the interviewer asked.” This is how you steer the ship. Without it, you’re just a passenger.

The Social Media Drafts

This was the biggest time-saver. You get drafts pre-formatted for each platform. Twitter threads come numbered and spaced like someone actually uses Twitter. It’s subtle, but it helps. Yeah, the copy is generic. But fixing a generic draft is infinitely easier than creating a good one from scratch.

The train wreck vs. the surprise win

If you take one thing away from this review, let it be this: Castmagic’s performance is entirely dependent on the structure of your source file. It’s a powerful engine that will just as easily create chaos as it will create order.

The train wreck—that 3-person mess I mentioned—was unusable because the AI had no logical path to follow. It couldn’t tell who was making a point or when a topic shifted, because there wasn’t one.

The webinar file, though? It had a clear beginning, middle, and end. It had defined sections. The AI latched onto that structure and produced a blog outline that was genuinely insightful. And that’s when it clicked.

The back-of-a-napkin math on if it’s worth it

Forget ROI for a second. Here’s the real math. The plan you’ll probably need is around $60 a month. Before this, it took me maybe 4-5 hours of my life to properly repurpose one episode of my podcast. That’s one blog post, one newsletter, and a few social posts.

With Castmagic in the workflow, I got that down to about 90 minutes. And most of that was me editing, not doing the grunt work. For my weekly show, it saves me over a dozen hours a month. It buys back my weekend.

Castmagic, Descript, Otter… Which one for what?

People lump these together, but they’re for different stages of the process. It’s not a competition.

My workflow now is: Record in Riverside, edit in Descript, then dump the final audio into Castmagic to build the marketing campaign. Each tool does one thing well.

So, should you actually buy it?

If you’re a creator who feels that pit in your stomach when you think about your content backlog, then yes. It’s for you. If you’re consistently creating long-form content and you just can’t keep up with the promotion… this is your relief valve. I was on a deadline, completely swamped, and this thing saved my bacon last month. It allowed me to show up on social media when I otherwise would have been silent.

If you’re looking for a video editor, or if your source material is mostly unstructured chaos, just save your money. The AI can’t perform miracles. It needs something good to work with.

I still don’t love repurposing content—who does? But now I don’t procrastinate on it for two weeks. That’s a win.