Pricing

Start free. See what attackers can see.

Passive assessment is free. When you need more, move on to owner-authorized active assessment and continuous monitoring. All prices exclude consumption tax.

One-time assessments

Pay per assessment. No contract term.

Tier 1Available

Passive assessment

Map exposed assets and weaknesses using only public data and ordinary requests.

¥0/ assessment · 1 domain

  • One ownership-verified domain
  • DNS, certificate and public host inventory
  • Findings with evidence and observation time
  • Explicit covered / not covered scope
  • Extra domains ¥9,800 each
Tier 2Coming soonEarly sign-up: 20% off

Active assessment

Active testing within written owner authorization and an agreed window.

¥150,000/ assessment · up to 30 hosts

  • Written authorization and agreed scope
  • Active port and service checks
  • Safe validation of known vulnerabilities
  • Report plus one retest after fixes
  • ¥3,000 per host beyond 30
Claim 20% off

Early sign-up discount, locked in at launch. No payment now.

Continuous monitoring

Coming soon

A subscription that keeps tracking change. Coming soon — join the early-access list.

For SMEs

Early sign-up: 20% off

Standard

¥29,800/ month

¥24,800/mo billed annually

For small teams that can't afford to miss a change in exposure.

  • Root domains5
  • Monitored hosts300
  • Passive re-assessmentWeekly
  • Change alertsEmail
  • Active assessment (Tier 2)Add-on
Claim 20% off

Early sign-up discount, locked in at launch. No payment now.

Recommended

For growing companies

Early sign-up: 20% off

Growth

¥79,800/ month

¥66,500/mo billed annually

Track a widening surface daily, including subsidiaries and cloud.

  • Root domains25
  • Monitored hosts3,000
  • Passive re-assessmentDaily
  • Change alertsEmail, Slack, webhook
  • Active assessment (Tier 2)1 / year included
Claim 20% off

Early sign-up discount, locked in at launch. No payment now.

For enterprises and MSSPs

Enterprise / MSSP

Custom quote

 

Manage many organizations and domains, and deliver to your clients.

  • Root domainsUnlimited
  • Monitored hostsCustom
  • Passive re-assessmentDaily
  • Change alertsEmail, Slack, webhook, API
  • Active assessment (Tier 2)4 / year included

Compare monitoring plans

Continuous monitoring plan comparison (tax excluded)
FeatureStandardGrowthEnterprise / MSSP
Monthly (excl. tax)¥29,800¥79,800Custom quote
Root domains525Unlimited
Monitored hosts3003,000Custom
Passive re-assessmentWeeklyDailyDaily
Change alertsEmailEmail, Slack, webhookEmail, Slack, webhook, API
Active assessment (Tier 2)Add-on1 / year included4 / year included
Users315Unlimited
Multi-organization——Included
SSO and audit log—Audit logSSO and audit log
SupportEmail (business days)Email, priorityNamed contact, reviews

All prices exclude Japanese consumption tax.

Pricing questions

Are there limits on the free passive assessment?

It's free for one ownership-verified domain. No credit card, and nothing converts to a paid plan automatically.

Do prices include consumption tax?

No. All prices exclude tax; consumption tax is added on the invoice.

Why does active assessment need written authorization?

Active testing without permission can be treated as unauthorized access. Separately from ownership verification, we agree targets, time window and contacts in writing before testing.

When will continuous monitoring be available?

It's in preparation. Join early access and we'll let you know at launch. Prices may change.

How do billing and terms work?

We plan to invoice (bank transfer). Monitoring is monthly or annual; annual saves about 17%.

Can MSSPs or resellers use ZeroKai?

Yes. The Enterprise / MSSP plan supports multiple organizations and client-ready reports. Terms are agreed individually.

See all questions

Start with a free passive assessment.

Verify your domain and see what attackers can already see.