B2B / Marketing

Promolist

A platform for quickly and easily finding business partners among over 5.4 million companies in Poland — and reaching them with an offer by traditional post, directly from within the system.

5.4M+ companies in database

6.5M+ indexed addresses

2,980 postal codes

Industry B2B / Marketing

Project type SaaS platform

Technologies

PHP

Angular

PostgreSQL

Google Maps API REST API Polish Post API Courier integrations Territorial databases

The challenge

What the client was facing

Reaching the right business partners in Poland required laboriously searching through scattered public registers, manually verifying data, and costly handling of marketing mailings. Promolist was created to close this process into a single tool — from finding a company to delivering an offer to their door.

Approach

What we did structurally

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 did the delivery process look?

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, enabling a marketing mailing to be ordered in a few minutes — a few clicks. The entire flow from finding companies, through preparing the address list, to ordering the mailing was contained in one tool.

Building a product with a similar challenge?

Describe the project

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 and combining it with a simple search interface and Polish Post integration can genuinely shorten the path from a campaign idea to its execution. Although the project is no longer active, it stands as an example of how technology can simplify complex B2B processes.

Project context

About the project

Promolist is a SaaS platform that allows you to search for business partners among over 5.4 million companies in Poland and reach them with an offer by traditional post — directly from within the system. The project combined aggregation of scattered public data with a simple search interface and direct integration with Polish Post.

How it works

We built an engine aggregating data from government systems, public registers, and official territorial databases — including 2,980 Polish Post postal codes. An interactive map with the ability to draw custom search areas, multi-level filters (PKD, location, business status, registration date), and instant results from over 6.5 million indexed addresses.

The key integration: a direct connection with Polish Post and courier companies. From finding recipients to ordering a marketing mailing — a few clicks, without leaving the platform. Stack: PHP, Angular, PostgreSQL, Google Maps API, REST API, Polish Post integrations.

Although the project is no longer active, it stands as an example of how technology can simplify complex B2B processes — from a campaign idea to its execution.

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