Castmagic vs Riverside
Riverside is where you record. Castmagic is where you repurpose. They're different stages of the same workflow, not direct competitors.
Verdict
Riverside is increasingly eating into Castmagic's territory by adding AI clips and show notes to its recording platform. If Riverside's built-in AI features are good enough for your repurposing needs, you can skip Castmagic. But if you need deep, customizable content extraction with custom prompts, Castmagic still wins on that specific job.