B2B prospecting product with a 5.4M-company database fed from public registries
Starting point
Manual searching across scattered registries, data verification and costly mail handling
Scope of responsibility
Data aggregation from government systems, search engine with map, Polish Post integration, direct mail sending system.
The challenge
What needed to change
Scattered data sources
Information about companies in Poland was spread across many government and public registers - with no single place to search them all.
Inconsistent and poor-quality data
Data from different systems often contained duplicates, outdated addresses, or incomplete contact information.
Costly marketing mailings
Reaching potential partners by traditional post required manual address preparation, formatting, and mailing arrangement.
Approach
Decisions that changed the system
Data aggregation and unification
We built an engine connecting data from government systems, public registers, and official territorial databases - including the Polish Post's postal code database. Consistency, deduplication, and accuracy at official source level.
Map search with area drawing
Interactive map with the ability to select regions, filter by location and postal code, and draw custom search areas.
Advanced filter system
Multi-level filters - company type, PKD code, licences, business status, registration date - allowing precise narrowing of results.
Process
How the work progressed
Data aggregation and normalisation
We designed a pipeline fetching data from multiple public sources - government registers, official territorial databases, and the Polish Post's postal code system. Every record went through a deduplication, validation, and normalisation process to ensure a consistent, reliable database.
Search engine build
We created a multi-layer search system combining an interactive map with a filter panel. Users could narrow results in dozens of ways - from drawing an area on the map, through PKD codes, to business status and licences.
Integration with mailing systems
We integrated the platform with Polish Post and courier companies. The entire flow - from finding companies, through preparing the address list, to ordering the mailing - was contained in one tool.
Outcome
B2B prospecting in one tool
5.4M+companies in database
Complete database of active companies in Poland, aggregated from multiple public sources and updated cyclically
6.5M+indexed addresses
Postal addresses validated against official territorial databases and Polish Post postal codes
10+search filters
Company type, location, postal code, PKD, licences, business status, registration date, and more
Promolist proved that aggregating scattered public data - combined with a simple search interface and Polish Post integration - shortens the path from a campaign idea to its execution. The project is no longer active.
