Should I use Squarespace or Wix for a podcast website?

You can, and they are good general builders with lots of design freedom. The catch for a podcast is that they open empty and have no podcast features built in. Every episode is a page you create, lay out, and link by hand, and to get transcripts, a per-episode page, on-site search, or clips you add a separate plugin or service on top. The design tools are great; the podcast plumbing is on you.

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