Contact Book
Contact Book: A feature-rich personal CRM with unusually broad API and automation access. Ranked #6 of 26 in Personal CRM Software by our editors (8.5/10); pricing: Free plan; best for API-oriented personal CRM users.
At a glance
- Editor score8.5 / 10
- PricingFree plan
- Best forAPI-oriented personal CRM users
- Free planYes
- Paid from€100/yr
- Facts checked22 Sep 2026
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
Our verdict on Contact Book
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.
Your product? Our editors can test Contact Book in depth and publish a review, labelled as paid · from $149/mo →
Contact Book pricing
All 2 Contact Book plans and prices →
Contact Book fact sheet
| Free plan | Yes |
|---|---|
| Paid from | €100/yr |
| Contact limit | Not verified |
| Follow-up reminders | Yes |
| Email/calendar sync | No |
| Mobile apps | Web |
| Import/export | Yes |
| Interaction history | Yes |
| Money-back guarantee | 30 days |
| Deployment | Cloud, Browser extension |
| Platforms | Web |
| Compliance & security | GDPR |
| Support | Email, Docs |
| Built for | Solo, Small business (editorial estimate) |
| Integrations | 7 integrations: HTTP API, CLI, MCP, Webhooks, WebSocket, GraphQL … |
| Pricing | Free plan (source) |
| Website | monicacrm.com |
| Facts checked | 22 Sep 2026 |
Contact Book integrations
Contact Book lists 7 integrations on its own site.
- HTTP API
- CLI
- MCP
- Webhooks
- WebSocket
- GraphQL
- Client libraries
Alternatives to Contact Book
- DexA broad personal CRM for connected contact management, reminders, and interaction history.9.2
- Contacts+ Personal CRMA broad personal CRM with free core tools and useful paid upgrades.9.0
- CovveA broad personal CRM for organized follow-up, scanning, and CRM-connected contacts.8.9
See all Contact Book alternatives →
Contact Book vs the competition
- Contact Book vs Dex
- Contact Book vs Contacts+ Personal CRM
- Contact Book vs Covve
- Contact Book vs Cultivar
- Contact Book vs Monica
- Contact Book vs Rumo
Compare Contact Book with any tool side by side →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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