Even if it where open source, it just as well be abandoned if the company tanks (Like Rubedo CMS). There's an open source headless CMS here: https://getdirectu

Even if it where open source, it just as well be abandoned if the company tanks (Like Rubedo CMS). There's an open source headless CMS here: https://getdirectus.com/ https://getdirectus.com/ It doesn't have all of the batteries of Sanity and uses normal SQL for data backend, but it's a good way there.