Dolibarr is a free, open-source software that covers most needs for a small company. I have been using it for five years and love it for its ease of use, mobile-friendly setup, and the customization it offers. I self-host it, but it’s possible to go through a service provider. Before deciding to use it you should check if the accounting part matches your need, and think well about self-hosted vs SAAS.
But overall I’m a happy user and warmly recommend it for associations, individuals and SMEs.