Alternatives

Products that do what CaptainDNS does

DNS management, diagnostics & monitoring in one platform.

1. 1DA
   DN$ – an innovative, ad-supported DNS resolver▲294

   Tired of companies snooping through your DNS traffic? Don't you wish you could get advertisements with your DNS records? Today we're introducing the innovative, privacy-focused, ad-supported DNS resolver - DN$! Traditional DNS resolvers provided by your internet service provider, cloudflare, or google could be tracking your internet activity and selling it to third-party data vendors. We at DN$ want to fix that and cut out these nefarious actors (until we've amassed a critical number of users to exploit). In order to support such a radically new business model, our service needs to serve…

   2024 · github.com

2. 2
   DomainWatch▲351

   Domain Monitoring Made Easy

   2018

3. 3
   KIT.domains▲28

   Domain infrastructure monitoring across all registrars

   Mar 2026 · kit.domains

4. 4
   DNS Scouter▲1

   Your All-in-One DNS & Domain Diagnostic Toolkit

   19d ago · dnsscouter.xyz

5. 5
   DNS Audit

   Free DNS security audits in one click

   Apr 2026 · dns-audit.com

6. 6
   Email Posture▲5

   Get alerted the moment your DMARC, SPF, or DKIM breaks

   Jul 2026 · emailposture.com

7. 7DM
   DnsTrace - Monitor DNS Queries by host processes using BPF▲23

   2024 · github.com

8. 8
   Infraova▲7

   Monitor and secure your email domains, campaigns, and client

   Jul 2026 · infraova.com

9. 9
   DMARC Digests▲101

   Protect your brand from email scammers.

   2020

10. 10AS
    A site to look up DNS records▲82

    2017 · dnsrecords.io

11. 11
    bypassed.me▲2

    📎169 free DNS, email, TLS diagnostics in one place + more!

    Jul 2026 · bypassed.me

12. 12
    OneDollarDNS▲4

    DNS record monitoring for $1/domain/month

    Jun 2026 · onedollardns.com

13. 13
    DMARKOFF▲88

    Simplified and total DMARC control

    Apr 2026 · dmarkoff.com

14. 14
    Mr.DNS - DNS & Network Tools▲3

    Free diagnostic tools for DNS, email, and network security.

    Apr 2026

15. 15
    Domain Scan Tools▲5

    Detect domain security issues before they hurt your business

    May 2026 · domainscan.tools

16. 16
    DKIM.pro▲3

    Monitor SPF, DKIM and DMARC before email breaks

    May 2026 · dkim.pro

17. 17DC
    DMARC Checker▲70

    2024 · dmarcchecker.app

18. 18
    ControlD▲87

    DNS service from Windscribe VPN

    2021

19. 19
    DomSec HQ▲1

    Instant domain security scanner: SPF, DKIM, DMARC & more

    5d ago · domsechq.com

20. 20
    Email DNS Check

    Diagnose SPF, DKIM and DMARC errors instantly

    Mar 2026

21. 21LC
    Ldns.com – fast DNS lookups from the URL bar▲7

    I built LDNS because I'm constantly curious about domain names - who owns them, which nameservers they use, how they're configured, and what their DNS records reveal. I wanted a fast, easy way to investigate domains right from my browser without juggling multiple tools. LDNS runs entirely client-side using Cloudflare's DNS over HTTPS. Just type a domain and instantly see: All DNS records with clickable filtering RDAP/WHOIS data with registrar info and expiration dates Email security configuration (SPF, DMARC, MTA-STS, BIMI) Export options (JSON, CSV, BIND zones, PDF reports) Try it at…

    2025 · ldns.com

22. 22
    FluxRadar▲7

    Ping, DNS, IP & network diagnostics in one place

    Jul 2026

23. 23
    Domain Watchdog▲3

    Catch every client domain problem before it costs you

    Jul 2026 · domainwatchdog.app

24. 24
    Email Deliverability Toolkit▲9

    9 free tools to keep your email out of spam

    9d ago · truelist.io

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