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REI3 vs Corteza: catalog facts
REI3	Corteza
Freemium Free for private and commercial use, with optional enterprise features and services.	Free Free and open source under Apache-2.0; Planet Crust offers hosted instances.
Web, Self-hosted	Web, Self-hosted
Build custom business apps without much code Library of free ready-made applications	Low-code builder for CRM and business apps Workflow automation built in
Building your own applications takes time to learn Some features are part of paid enterprise offerings	Low-code setup takes time before it works as a CRM Self-hosting requires DevOps knowledge
Self-hosted	Self-hosted, Hosted service
Open source	Open source
License: MIT	License: Apache-2.0
Not stated if an account is needed	Account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.