Case study

The registry radar that turns open data into sales signals.

Sales lists decay silently. Companies enter liquidation, new companies appear, and VAT registrations reveal businesses that may have crossed from side project into real operating company.

Internal data system · Estonian open data
  • 376,365entities in the recorded extractInternal observation
  • 41unit tests for the radar toolingInternal observation
  • 219 / 292rows matched on first hygiene runInternal observation
  • 1live liquidation found on first hygiene runInternal observation

How these were measured: Source: operations/systems/B-12-registry-radar-ariregister-daily-diff.md and B-11-list-hygiene-call-list-register-reconcile.md record the extract size, timers, report mode, tests and first reconciliation result.

Evidence class: Internal system

Reviewed 2026-09-30 · Kratt editorial review

What we shipped

Registry radar downloads the Estonian Business Register open-data extract, diffs it against yesterday, and reports new registrations, new VAT numbers and status changes. List hygiene then reconciles the live call list against that snapshot so humans see do-call and do-not-call signals before writing anything into CRM.

  1. Daily Business Register open-data download

  2. Snapshot diff on registry code

  3. New registration, new VAT and liquidation reports

  4. Call-list reconciliation against the register snapshot

  5. Read-only report mode before CRM writes

  6. Systemd timers and Slack/report sinks

  7. 41 unit tests recorded in the system cards

Ownership and handover

Current owner

Kratt owns and operates this internal system.

Kratt's role

Kratt designed, built, and maintains the capability for its own work.

Handover

It is shown as capability evidence, not as a promised client deliverable.

What this page does not claim

  • No raw company list, contact list, personal data, Slack webhook, environment path or CRM table detail is exposed.
  • No revenue, meeting or close-rate claim. The cards prove signal generation and reconciliation, not sales outcomes.
  • The system cards mark owner confirmation as pending, so the page stays conservative and internal-proof only.

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