Are there any CRM systems with a good free tier for startups?

I am currently working on setting up a CRM for my small business, which is still in its early stages. We're a small team with a limited budget, and we are looking for a CRM that offers a free tier to help us manage our contacts and track interactions .
We've tried a couple of options, but we found that many free versions come with significant limitations or aren't as user-friendly as we hoped. Are there any CRM systems that offer a good free tier and are suitable for startups like ours?
Any recommendations or insights would be greatly appreciated.