It is open source, but has turnkey solution as well
https://castopod.com/en#features
It is not a traditional “pay-for-service” company. Instead, it is software (licensed under AGPLv3) that you can self-host on your own server
It integrates with the “Fediverse” (like Mastodon), allowing your listeners to comment and interact with your podcast episodes via decentralized social networks.
It is fully compliant with the “Podcasting 2.0” movement, which prioritizes open standards over walled-garden platforms like Spotify or Apple.