Google Workspace CRM integrates Gmail, Calendar, and Meet with AI-powered contact management and sales tracking for small teams using Google's ecosystem.

EspoCRM is an open-source CRM with AI-enhanced lead management, email integration, and workflow automation for small to medium businesses.

HubSpot CRM Free offers contact management, deal tracking, and email integration with built-in AI features. Its AI scores leads and suggests optimal send times. Small businesses use it as a free entry point to CRM.

Really Simple Systems is a cloud CRM with AI-powered contact management, pipeline tracking, and email integration for small business sales teams.

Nimble is a social sales CRM that aggregates contact data from email, calendars, and social media into unified relationship profiles. Its AI assistant surfaces conversation history, engagement suggestions, and optimal contact times for relationship-driven selling.

Cognism is a B2B sales intelligence platform providing verified company demographics, technographic data, and direct contact details. Its key differentiator is GDPR-compliant data from verified intent signals, making it suitable for European markets. It targets SDRs and revenue ops teams with Salesforce, HubSpot, and Outreach integration.