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masscan vs RustScan: catalog facts
masscan	RustScan
Free The open-source software is available without a license fee. Hosting, hardware and…	Free The open-source software is available without a license fee. Hosting, hardware and…
macOS, Linux, Command line	Windows, macOS, Linux, Command line
Uses a high-throughput command-line scanning engine.	Supports follow-up scripts and integration with other scanning tools.
High packet rates can overwhelm networks if poorly configured.	Scan rate must suit the network and host resources available.
Downloadable app	Downloadable app
Open source	Open source
License: AGPL-3.0	License: GPL-3.0
Not stated if an account is 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 September 22, 2026	Official website Full listing and sources Checked September 22, 2026

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