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FlashStart vs Control D: catalog facts
FlashStart	Control D
Paid Paid licences with a free trial; prices are given on request.	Freemium A free tier is available. Paid plans are charged per endpoint.
Web	Windows, macOS, Linux, Android, iOS
Category, user, device and schedule-based content filtering Malware and phishing blocking at the DNS level	Per-device profiles and very granular per-service rules Encrypted DNS with apps for every major platform
Pricing is not published on the homepage Aimed mainly at businesses, ISPs and organisations	Filtering happens on their infrastructure, so they see your lookups Most useful features are behind a paid plan
Hosted service	Downloadable app, Hosted service
Closed source	Closed source
License not stated	License not stated
Account needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 22, 2026

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