What are some good alternatives to WordPress for small businesses and nonprofits?

I've used WordPress in the past with no major issues, but recently I've run into some problems that are pushing me to explore alternatives. I mostly work with small to medium-sized companies and nonprofit organizations, and I'm trying to find a content management system (CMS) that fits their needs. Here are my requirements: 1) It should be easy to set up on a shared hosting plan—things like Docker or Node aren't an option for me, but databases are fine. 2) My clients want the ability to edit content themselves. I don't need a full page builder, but having something visual would be helpful, or custom fields that I can pre-set for them would work too. 3) Ideally, it should be free or low-cost. Nonprofits often have tight budgets, and it's tough to justify spending $250 a year on a CMS when WordPress is free. If there's unavoidable cost, I'd prefer it not to involve vendor lock-in, which rules out platforms like Wix that don't allow for easy data transfers. Finding an alternative is surprisingly challenging. Most options seem too enterprise-focused or have high costs, whereas headless CMSs only complicate things further when my clients expect a straightforward billing process. I'm curious if I'm overlooking any good options or if this niche really is tough to fill.