Sure, WordPress is awesome.

But have you considered these open source alternatives?

They are free, self-hostable and community-driven.

Check by yourself: Ghost , Directus .

So is Ghost

Headless CMS for professional publishing
★ 55K CMS Blog License: MIT
Ghost is the most popular open sourcem headless Node.js CMS which already works with all the tools you know and love.

Read more about Ghost
So is Directus

Un CMS headless open-source
★ 37.5K CMS Database Data License: BSL
Directus è un'API in tempo reale e dashboard dell'applicazione per gestire contenuti di database SQL.

Read more about Directus