kant.au vs SecurityTrails: Are You Monitoring Your Own Domains, or Investigating Someone Else’s?
Searching for a SecurityTrails alternative usually means one of two very different things. You either want a lighter way to investigate DNS history on a domain you don’t own, or you want an actual monitoring tool for the domains you do.
Those are different jobs, and it’s worth being clear on which one you have before comparing tools. SecurityTrails and kant.au both touch DNS data, but they weren’t built to answer the same question.
What SecurityTrails is actually built for
SecurityTrails is an OSINT and threat-intelligence platform. Its core product is scale: over 10 trillion historical DNS lookups, billions of historical WHOIS records, and hundreds of millions of tracked domains and hostnames, all queryable through an API and a query language built for security researchers. It’s the tool you reach for when you’re investigating infrastructure you don’t control, tracing where a suspicious domain has pointed over the years, or correlating hosting history across thousands of unrelated domains during a threat hunt.
That scale comes at a price built for that use case. Plans start at $500 a month for 20,000 queries, which makes sense for a security team running investigations across someone else’s infrastructure, and makes far less sense for someone who just wants to know if their own domain’s DNS records changed last night.
What kant.au is actually built for
kant.au starts from the opposite direction. Not “any domain on the internet,” but the specific domains you or your clients are responsible for. Instead of a query API, it’s a dashboard that continuously tracks DNS records and change history, WHOIS and expiry, email authentication (SPF, DKIM, DMARC, and actual inbox deliverability testing, not just reading the DNS records), SSL certificate health, security headers, subdomain takeover exposure via certificate transparency log scanning, technical SEO issues, and uptime, all for the domains you’ve added.
Plans start at $12 a month for a handful of domains, scaling to $29 and $69 a month as a portfolio grows, with a 14-day free trial and no credit card required to try it first. There’s also a free tier for people who just want to see how it works on a demo domain before committing to anything.
The design assumption is different too. SecurityTrails assumes a security analyst comfortable writing queries against a data warehouse. kant.au assumes a freelancer, small agency, or technical site owner who wants a dashboard, a notification when something changes, and a place to leave a note for a teammate explaining why it changed.
Side by side, the positioning looks like this:
| SecurityTrails | kant.au | |
|---|---|---|
| Primary focus | Internet-scale DNS and OSINT threat hunting | First-party domain health and active monitoring |
| Target user | Security analysts, threat hunters, SOC teams | Agencies, freelancers, site owners |
| Key data | 10T+ historical DNS and WHOIS records across any domain | DNS, email, SSL, security header, and SEO checks on domains you manage |
| Pricing model | Query-volume API plans, from $500/month | Per-domain monthly tiers, $12 to $69/month |
Where they actually overlap, and where they don’t
To be fair to SecurityTrails, it isn’t just a lookup tool. It supports monitoring and alerts too, for IP, WHOIS, and hosting-related changes on domains you’re tracking. If you’re already using SecurityTrails for investigations and want alerting bolted onto the same workflow, it can do that.
The real difference isn’t “one of us alerts you and the other doesn’t.” It’s what gets watched, and for what purpose. SecurityTrails’ monitoring is one feature inside an investigation platform, scoped to DNS, WHOIS, and IP infrastructure signals, and priced for teams already paying for internet-scale historical data. kant.au’s monitoring is the entire product, and it spans categories SecurityTrails doesn’t cover at all: email authentication drift, SSL certificate issues, missing security headers, and technical SEO problems, all in one dashboard built around the domains you actually manage.
Is kant.au a good SecurityTrails alternative?
It depends on why you went looking at SecurityTrails in the first place. If you ended up there wanting to keep tabs on your own domains, or your clients’, and found yourself staring at a query API built for threat intelligence, kant.au is a direct, purpose-built alternative for that job. If you actually need internet-scale DNS forensics on domains you don’t control, it isn’t, and it was never trying to be. That’s the smaller group of the two.
A quick way to tell which camp you’re in:
- Investigating a domain you don’t control? Tracing infrastructure history, correlating hosting across many unrelated domains, running a threat hunt. SecurityTrails is the right category of tool.
- Responsible for domains you or your clients own? Want DNS, email, SSL, security, and SEO issues surfaced in one place without writing API queries. That’s what kant.au is built for.
- Not sure which, and just want to know if anything’s currently wrong with a site you manage? Start there. That’s the more common need, and the cheaper problem to solve.
They’re not really competing for the same job. Picking between them just means being honest about which job you actually have.
Want to see what kant.au actually tracks for a domain you manage? Start a free 14-day trial or see the full plan breakdown.