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bgp.tools vs BGPalerter: catalog facts
bgp.tools	BGPalerter
Freemium Free routing data and lookups; network, IRR and RPKI monitoring are paid.	Free Free and open source.
Web	Linux, Self-hosted, Command line
Search by ASN, prefix, DNS name or MAC address Near realtime BGP data at no cost	Pre-configured for common BGP and RPKI problems Real-time detection of hijacks and visibility loss
Monitoring features require a paid account Assumes familiarity with BGP concepts	Only useful to operators of their own prefixes or ASNs Releases are infrequent
Web application	Self-hosted
Closed source	Open source
License not stated	License not stated
No account needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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