One of the most powerful is PodcastAI, which has a broad range of automation options including transcription, chapter generation, metadata generation and ad-read generation. It also has a full suite of tools to handle podcast distribution and website generation, so it's a good option for serious podcasters trying to optimize their workflow.
Another good option is PodSqueeze, an AI tool to help you create podcast content more quickly. It can generate full transcripts with SRT files, show notes with summaries and chapter markers, and automated social media posts and blog posts. It also has podcast research tools and lets you pick your own AI voice, so it can accommodate a lot of different podcasting needs.
If you want something more of a one-stop shop, Riverside offers high-quality podcast and video recording and editing with AI tools like automated transcription, show notes generation and clip creation. Its text-based editor and magic clips feature make it easy to organize and edit recordings, and it's got a clean, efficient interface for podcasters.