Side by side

DNS Spy vs ThousandEyes DNS Monitoring

Both stand on dns monitoring software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

DNS Spy

Free trial APIWeb

DNS Spy combines DNS monitoring, security checks, expiration tracking, and phishing-domain detection, with features varying by plan. Review domain limits and trial terms before choosing a plan.

Visit DNS Spy

ThousandEyes DNS Monitoring provides detailed DNS checks, hierarchy tracing, DNSSEC verification and broad alert routing. Its paid, usage-based structure is suited to organizations that need monitoring across varied infrastructure.

Visit ThousandEyes DNS Monitoring

The facts

	DNS Spy	ThousandEyes DNS Monitoring
Free plan	A free trial	A free trial
Open source	Not published	Not published
Runs on	API, Web	Android, API, iPhone, Linux, Mac, Self-hosted, Web, Windows
Lowest paid plan	Personal: $9 a month	Free or on request
Plans published	2	1
Maker	Not published	Not published
Website	dnsspy.io	thousandeyes.com
On dns monitoring software	#27 of 37	#31 of 37

DNS Spy: what it does well

Monitors 60+ DNS record types and change history.
Runs 40+ automated security checks.
Tracks domain and SSL expiration details.
Enterprise adds multiple alert channels and a REST API.
Account deletion permanently removes records and history.

What to know first

No free plan is listed.
The 7-day trial requires a card up front.
Personal supports up to 10 domains.
DNS record data is stored in AWS US East.

ThousandEyes DNS Monitoring: what it does well

Monitors on-premises and third-party DNS
Traces complete DNS hierarchies
Verifies DNSSEC keychains
Alerts on record changes
15-day trial with global Cloud Agents

What to know first

No free plan
Pricing is available on request
Annual cost depends on visibility needs
Usage is calculated from test units

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