HubSpot
Best overall for startupsHubSpot is a customer platform combining CRM, marketing, sales, service and content tools. Its free CRM and modular 'Hubs' make it a common starting point for small and mid-sized B2B teams.
Why we picked it
The fastest way for a startup to get a real CRM running: a genuine free tier, minimal setup, and marketing and service tools in the same system when you need them later — no migration required as you grow.
Watch out for
Costs rise steeply at the Professional and Enterprise tiers, and key automation features are gated to higher plans — model the upgrade path before committing.