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Nginx vs Realm: catalog facts
Nginx	Realm
Free Nginx open source is free. Nginx Plus is a paid subscription.	Free Free and open source under the MIT licence.
Windows, macOS, Linux, Self-hosted	Windows, Linux, Self-hosted, Command line
Event-driven model handles large numbers of idle connections cheaply One binary covers static serving, reverse proxying, caching and load balancing	Starts a relay with a single command Concurrent bidirectional forwarding
Dynamic modules must usually be compiled in Several load-balancing and monitoring features are exclusive to the paid Nginx Plus	Command-line only, with no graphical interface Documentation is mostly in the repository readme
Self-hosted	Downloadable app, Self-hosted
Open source	Open source
License: BSD-2-Clause	License: MIT
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 2, 2026

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