SecurityTrails Alternatives 2026 — DNS & Asset Discovery

Enterno.io Editorial Team

SecurityTrails Alternatives

By Anatoly Oshmanovsky · Updated Apr 17, 2026

Key idea:

SecurityTrails (securitytrails.com, Recorded Future) is an enterprise platform for DNS history + subdomain enumeration + asset discovery. Price: $49-$499/mo. Single-task alternatives: Enterno.io (DNS + subdomain without history), crt.sh (CT logs), DNSdumpster (free scan), VirusTotal Passive DNS.

Below: competitor overview, feature-by-feature comparison, when Enterno.io wins, FAQ.

Try it now — free →

About the Competitor

SecurityTrails founded in 2017, acquired by Recorded Future in 2022. Historical DNS since 2008, active + passive DNS, WHOIS, subdomain enum. Enterprise focus — pricing not for small teams.

Enterno.io vs Competitor — Feature Comparison

Feature	Enterno.io	Competitor
Current DNS lookup	✅	✅
Historical DNS (>1 year)	❌	✅
Subdomain enumeration	✅	✅
Passive DNS	❌	✅
Free tier	✅	50 queries/mo
API	✅ Pro	✅ Paid
Price	₽0-490/mo	$49-499/mo
Monitoring integration	✅ built-in	⚠️

When to Pick Enterno.io

Daily DNS checks without historical data
Budget $49+/mo is too much
Want DNS + uptime monitoring in one UI
Deep security research with historical snapshots — SecurityTrails

A / AAAAIPv4 and IPv6 host addresses

MX RecordsDomain mail servers

TXT / SPFVerification & anti-spoofing

NS / SOAName servers & zone authority

Why teams trust us

DNS record types

SPF+DKIM

email protection

<1s

DNS response

check regions

How it works

Enter domain

Select record type

Get DNS response

What are DNS Records?

DNS (Domain Name System) translates domain names into IP addresses. DNS records are instructions that define where to route traffic, email, and how to verify domainownership.

Complete Lookup

Query all record types — A, AAAA, MX, NS, TXT, CNAME, SOA — in a single request.

Instant Results

Direct queries to authoritative servers. Results in milliseconds, no caching.

Security Checks

SPF, DKIM, and DMARC analysis to evaluate email protection against spoofing and phishing.

Export & History

Save check results. Compare DNS records before and after registrar changes.

Who uses this

DevOps

DNS check after deploy

Email marketers

SPF/DKIM/DMARC audit

SEO

DNS config audit

Sysadmins

DNS zone control

Common Mistakes

❌

Missing SPF recordWithout SPF, emails may land in spam. Add a v=spf1 TXT record.

❌

Single NS serverIf the only NS fails, the domain becomes unreachable. Use at least 2 NS servers.

❌

CNAME conflicting with other recordsCNAME cannot coexist with MX or TXT on the same name — this violates RFC.

❌

TTL set too highWith 86400s TTL, DNS changes take a full day. Lower TTL to 300 before migrations.

❌

Missing PTR recordMail servers check PTR. Without it, emails may be rejected.

Best Practices

✓

Set up SPF + DKIM + DMARCThe trio of records that protects your email from spoofing and improves deliverability.

✓

Use 2+ NS serversDistribute NS servers across different networks for redundancy.

✓

Lower TTL before migrationSet TTL to 300 at least 24-48 hours before an IP change for fast propagation.

✓

Verify DNS after changesAfter updating records, confirm changes propagated correctly and no errors remain.

✓

Add a CAA recordCAA restricts which Certificate Authorities can issue SSL certificates for your domain.

Get more with a free account

DNS check history, API keys and DNS change monitoring.

Learn more

How-to

Glossary

Research

Alternatives

Frequently Asked Questions

What is Passive DNS?

An archive of every DNS query that passed through recursive resolvers (ISP level). Shows when a domain resolved to which IP over time. Private IPs included.

Is Passive DNS available for free?

Limited sources: VirusTotal API (Private) ~1000 queries/day, Mnemonic PassiveDNS free tier 5000/day. Coverage below SecurityTrails.

How do I find hidden subdomains?

<a href="/en/subdomain-enum">Enterno Subdomain Enumeration</a> — CT logs + DNS brute force. Or SecurityTrails paid goes deeper.

Does it replace Shodan?

No, different jobs. Shodan = open ports/services. SecurityTrails = DNS + domain intelligence.