Odoo CE vs Odoo EE

Odoo CE (Odoo Community Edition) is a free part of Odoo licenced under LGPL-1.

Odoo EE (Odoo Enterprise Edition) is a proprietary part of Odoo licenced under Odoo Enterprise Edition License v1.0. The price varies depending on
+ country
+ num of users and apps
+ payment terms (annually / monthly)

Check Price Calculator for details.

Comparison

Any EditionOdoo Enterprise only
Installation
+ Doodba (for advanced users)
+ Odoo.sh (supports custom modules)
+ Odoo Cloud Hosting (built-in modules only)
Continous Integration
+ DINAR
+ Custom scripts
+ Odoo.sh (supports custom modules)
Continous Deployment
+ Custom scripts
+ Odoo.sh (supports custom modules)
Implementation Service
+ Self-service
+ Freelancers
+ IT-Projects LLC
+ Apps Store
+ Success Packs (recommended for < 50 users)
+ Local Odoo Partners
Database migration to new Odoo version
+ OpenUpgrade — Migration Library maintained by OCA
+ Odoo Upgrade Service — official service to convert Odoo dump to next Odoo version
Enterprise features
+ OCA's modules
+ Custom implementation
+ Documents
+ Easy Signature
+ Rental
+ Recurring billing (subscriptions)
+ Amazon Sales Connector
+ Helpdesk
+ Odoo Studio — Customize Odoo without making a module
+ Android App
+ iOS App
+ and other
VOIP Intergration
+ connector-telephony maintained by OCA
+ Asterisk Calls provided by Odooist company
+ OnSIP.com integration