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Scamper vs NextTrace: catalog facts
Scamper	NextTrace
Free Scamper is free software licensed under GPL-2.0.	Free Free and open source.
Windows, macOS, Linux, Command line	Command line
Supports IPv4 and IPv6 probes Runs measurements across destinations in parallel	Shows geolocation and ASN for every hop Fast trace mode for quick checks
Some measurement modules require IPFW or PF.	Command line only Geolocation lookups rely on online IP data sources
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0-only	License not stated
Not stated if an account is needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 24, 2026

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