HubSpot is the all-in-one CRM platform that UK startups turn to first. Its free tier is genuinely powerful — unlimited contacts, deal pipelines, email tracking, and live chat — making it the best starting point for early-stage teams. Paid tiers (from £41/month) add automation, sequences, and deeper reporting. GDPR compliance is built in with cookie consent tools, DPA agreements, and EU data storage on paid plans. The main downside is that costs can escalate quickly as you grow beyond 10 users.