Are “free” CRM´s worth it?

I am currently looking for a low cost solution and was checking the supposedly free solutions, however I´m kinda wary about what hidden costs will I encounter once I start using said systems…which if present, will make me just lose time switching to a low cost platform that I could had chosen from the beginning.

Anyone had experience with them here?

I´m looking for something where I can basically centralize my email, fb, instagram and whatsapp channels into one place.