Run Unbound as a validating, recursive, caching DNS resolver for network domain lookups.
Open source
24 alternativesQuad9
Route DNS queries through Quad9, a free public recursive resolver focused on security and privacy.
About Quad9
Quad9 is a public recursive DNS resolver that replaces a default ISP or enterprise DNS configuration. It checks DNS lookups against a list of threats and blocks those associated with malware, phishing, spyware, and botnets for computers, mobile devices, and IoT systems. The service states it does not log data containing IP addresses during normal use and supports encrypted connections when the user's system supports them. It is operated by the Swiss-based Quad9 Foundation.
Key features
- Replaces ISP or enterprise DNS configuration
- Blocks malicious hostname lookups from threat list
- Includes malware, phishing, spyware, and botnet categories
- Supports encrypted connections when device supports it
- States no IP-address data logged during normal use
Best for: Users who want an alternative to ISP or enterprise DNS that blocks known malicious domains.
Good for
- Blocks DNS lookups for several threat categories including phishing and malware
- States that IP-address data is not logged during normal use
- Supports encrypted connections where the user's system allows it
Watch out for
- Encrypted connections work only if the user's system supports them
Quad9 at a glance
- Website
- quad9.net
- Category
- Development › Network Tools
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
Quad9 alternatives
Tools and sites you could use instead, ranked by how closely they match.
SpiderSuite provides web crawling, interception, and analysis tools for security testing.
Explore HaGeZi DNS free, non-commercial public DNS servers operated in Europe.
Open source
24 alternatives
Resolve and cache DNS queries with Unbound, a validating resolver that supports encrypted DNS protocols.
Get a free JavaScript-focused web address through JS.ORG for hosting a project on GitHub Pages.
Resolve DNS queries with DNS.SB, which supports DNS over HTTPS and DNS over TLS.
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Quad9 FAQ
What does Quad9 replace?
It replaces the default ISP or enterprise DNS configuration.
How does Quad9 describe its privacy handling?
It states that no data containing IP addresses is logged during normal use and that connections can use encryption if the system supports it.
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