# Contacts & address books compared head to head

> 3 head-to-head comparisons of contact and address book APIs for AI agents, grouped by the job each pair shares, with benchmark scores for both sides.

- Canonical: https://www.anchorterminal.com/compare/contacts/
- Markdown: https://www.anchorterminal.com/compare/contacts/index.md (~400 tokens)
- Slim: https://www.anchorterminal.com/compare/contacts/index.min.md (~330 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/contacts/index.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-14

- Ranked table: https://www.anchorterminal.com/categories/contacts.md

## Ranked

1. [Google People API](https://www.anchorterminal.com/tools/google-people-api.md) B 65.2
2. [Microsoft Graph People and Contacts API](https://www.anchorterminal.com/tools/microsoft-graph-people.md) B 64.6
3. [ContactsPlus](https://www.anchorterminal.com/tools/contactsplus.md) E 42.4

## Reading contacts

- [ContactsPlus vs Google People API](https://www.anchorterminal.com/compare/contactsplus-vs-google-people-api.md): E 42.4 vs B 65.2
- [ContactsPlus vs Microsoft Graph People and Contacts API](https://www.anchorterminal.com/compare/contactsplus-vs-microsoft-graph-people.md): E 42.4 vs B 64.6
- [Google People API vs Microsoft Graph People and Contacts API](https://www.anchorterminal.com/compare/google-people-api-vs-microsoft-graph-people.md): B 65.2 vs B 64.6