Yes, Spasm is open source. It has been in development since 2021 and it's currently the most advanced generation of decentralized social media. You can find all the links at the official website https://spasm.network
Discussion
Correct me if I am wrong, but the forum that this thread is talking about is not running on Spasm.
SimplifiedPrivacy runs a Spasm-powered forum, you can read the same thread on its website, as well as on other federated Spasm instances, with replies from both Spasm and Nostr networks.
https://forum.simplifiedprivacy.com/news/spasmid01f91e058945409d9f80140