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GlockApps vs MultiRBL: catalog facts
GlockApps	MultiRBL
Freemium A free spam checker and DNS record checkers are available; full placement testing and…	Free Free to use, with optional Bitcoin donations.
Web	Web
Shows inbox or spam placement across major mail providers Checks SPF, DKIM and DMARC alongside blocklists and spam score	Checks over 200 blacklists and whitelists Supports IPv4 and IPv6
Full seed-list testing requires a paid plan Aimed at bulk and marketing senders more than individuals	No help with removal requests Plain interface with lots of technical output
Web application	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is 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 September 23, 2026

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