Moving off WordPress scares podcasters because of SEO — years of episode URLs indexed by Google. Done correctly, migration is a net positive: faster site, same URLs (or proper redirects).
Before you switch: Export a list of all indexed URLs from Search Console. Note your top 20 traffic pages — usually recent episodes and the homepage.
Build on Castee first. Import RSS, match template to your brand, publish on a staging subdomain. Verify episode pages render correctly.
Map redirects. Old path `/episode-12-guest-name/` → new path `/episodes/12-guest-name/`. Use 301 (permanent), not 302. Castee Creator plan includes a redirect manager and CSV import.
Switch DNS. Point your domain to Castee only after redirects are tested. Submit updated sitemap to Search Console.
Monitor for 30 days. Watch crawl stats and fix any 404s immediately. Rankings typically stabilize within two weeks for well-mapped migrations.