ProbeKit vs Hardenize
Comparing tools for TLS, DNS and email security and looking for a Hardenize alternative? This page lists what ProbeKit checks and watches. For Hardenize’s features and prices, see its own site.
Where Hardenize is strong
Hardenize is well regarded for thorough, security-focused configuration testing.
What ProbeKit offers
- TLS and HTTPS: Certificate chain and expiry, protocol versions, HTTP to HTTPS redirects and security headers.
- Email transport security: MTA-STS, TLS-RPT and STARTTLS on your MX hosts, alongside SPF, DKIM and DMARC.
- DNSSEC: DNSKEY, DS and RRSIG checks, with a monitor that warns before signatures expire.
- Monitors that warn early: Certificate and domain expiry, security headers and MTA-STS monitors. 3 monitors on 2 domains with email and webhook alerts on the free plan.
- Published pricing: Free, Pro $15/month ($12 billed annually) and MSP $79/month ($65 annually), all on one page.
Type a domain, IP, email or URL and pick a check, or a prefix like Pick a check, or type a prefix like spf: · press / to search
FAQ
- Can ProbeKit warn me before a certificate expires?
- Yes. A certificate monitor alerts you 14, 7, 3 and 1 days before expiry, by email, Slack, Teams, webhook or PagerDuty.
- Does ProbeKit check MTA-STS and TLS-RPT?
- Yes. It fetches the MTA-STS policy, checks it against your MX hosts, and reads your TLS-RPT record.
- Is there an API?
- Yes: a REST API with an OpenAPI spec. The free plan includes 100 requests a day, Pro 5,000 and MSP 50,000.
- Does ProbeKit replace Hardenize?
- For everyday TLS, DNS and email security checks with monitoring, many teams can use ProbeKit instead. Compare the specific tests you rely on with Hardenize’s own site; this page does not describe Hardenize’s product.
Other comparisons: ProbeKit vs MxToolbox · ProbeKit vs dmarcian · ProbeKit vs EasyDMARC · ProbeKit vs DNSChecker
Hardenize is a trademark of its owner. ProbeKit is not affiliated with Hardenize.