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Neustar UltraDNS [EOL] vs Quad9 comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Apr 20, 2025

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Categories and Ranking

Neustar UltraDNS [EOL]
Average Rating
0.0
Number of Reviews
0
Ranking in other categories
No ranking in other categories
Quad9
Average Rating
6.0
Reviews Sentiment
7.9
Number of Reviews
2
Ranking in other categories
Internet Security (8th), Managed DNS (5th)
 

Featured Reviews

Use Neustar UltraDNS [EOL]?
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Louis Geoffroy - PeerSpot reviewer
It's easy to use and set up, but I've faced performance problems
I have experience with Quad9 and most other filtering solutions. Quad9 was working well initially, but it started slowing, so I switched to OpenDNS. I recently checked Tom's Hardware, an IT review site, and read a review of seven DNS filters. Open DNS was ranked the fastest, and Quad9 was second. Google was on there too, but they said it didn't filter enough.
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Top Industries

By visitors reading reviews
Computer Software Company
25%
Financial Services Firm
14%
Media Company
10%
Manufacturing Company
9%
Comms Service Provider
20%
Computer Software Company
18%
Hospitality Company
8%
University
5%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
No data available
 

Questions from the Community

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Which would you choose - Cloudflare DNS or Quad9?
Cloudflare DNS is a very fast, very reliable public DNS resolver. It is an enterprise-grade authoritative DNS service that offers great redundancy and advanced security with built-in unmetered and ...
 

Also Known As

UltraDNS
No data available
 

Overview

 

Sample Customers

Silverstring
CISCO, Netlab, proofpoint
Find out what your peers are saying about Cloudflare, Amazon Web Services (AWS), BlueCat and others in Managed DNS. Updated: July 2025.
861,524 professionals have used our research since 2012.