Contact Book review
A feature-rich personal CRM with unusually broad API and automation access.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Contact Book is a hosted personal CRM for individuals who want more than a basic address book. It combines contact profiles, personal details, conversation and activity history, notes, journals, follow-up reminders, life events, birthdays, gifts, and relationship graphs. The free plan covers profiles, interaction history, reminders, events, gifts, and relationship features, making it suitable for people who want a structured way to maintain personal connections without starting with a paid subscription.
Its strongest distinction is the breadth of its integration surface. Contact Book supports an HTTP API, CLI, MCP, webhooks, WebSocket, GraphQL, and client libraries. That combination gives API-oriented users several ways to connect relationship data with custom workflows and AI-agent workflows. The product is available through the web and API, with hosting in Germany, plus self-service export and account deletion. It is a particularly good fit when extensibility matters as much as contact management.
Pricing follows a freemium model. The Free plan costs €0 per month and requires no credit card. Standard costs €10 per month when billed monthly, or €100 per year when billed annually. Contact Book is a strong choice for users who value detailed relationship records, follow-up structure, and developer access in one system. It is less suitable for buyers who need email or calendar synchronization, native mobile apps, or an open-source deployment model. Those priorities point toward a more platform-integrated or self-hosted alternative.
Contact Book pros and cons
- Where it wins
- Free plan includes profiles, history, reminders, events, gifts, and relationships
- API, CLI, MCP, webhooks, GraphQL, and client libraries
- Self-service export and account deletion are available
- Where it doesn't
- Access is web-first rather than through native mobile apps
- Email and calendar sync are not included
- Open-source deployment is not available
Contact Book fact sheet, pricing and score →
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