Hey Faith! HubSpot is actually a great choice with Clay they integrate really well. You can pull in contacts, enrich data and automate outreach easily.
Other good options are Salesforce (if you're going big) or Pipedrive (if you want something simpler). But if you're already thinking HubSpot I'd say go for it it works great with Clay for PLG use cases.
Let me know your current tools and I can help you set up the right flow.