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