What is the main business of Side?

The main business activity of Side focuses on buying and selling of own real estate.

When was the company founded?

The company was registered in the Polish National Court Register (KRS) on March 24, 2014.

Where is the headquarters located?

The headquarters is located at: ul. Dąbrowa 47, 85-147 Bydgoszcz.

Who is on the management board?

The management board consists of: Paula Sandra Mazurkiewicz (President of the Management Board).

What is the share capital?

The share capital of the company is PLN 5,000 (approx. $1,351).

What period do the latest financial data cover?

The latest available financial statement covers the period from January 1, 2025 to December 31, 2025.

How much revenue was generated?

The company reported a revenue of $137,159 in 2025, which is an increase of 133.8% compared to 2024.

Yes, the company recorded a net profit of $60,335 in 2025, meaning the company increased its profit by 251.8%.

What is the largest operating cost?

The largest operating cost category falls under other operating costs. This category amounted to $45,103 in 2025, representing 60% of all operating expenses.

Sidesp. z o.o.

Buying and selling of own real estate

KRS: NIP: REGON:

Overview

Status

Active

Registry date

2014-03-24

Share capital

5,000.00 PLN

Activity description

Side is a provider of free email services through Poczta Onet, offering features such as intelligent folders for message sorting, email aliases, and secure online payment options. The platform ensures email security with two-step verification and advanced anti-spam filters, and it provides mobile applications for both Android and iOS devices. Users can access their email from various devices, including computers, tablets, and smartphones.

Registered address

ul. Dąbrowa 47, 85-147 Bydgoszcz, Poland

Financials

Revenue history (in k)

Filing timeliness

3 of 6 financial statements were filed late (the longest delay 1019 days for 2021).

202515/07/2026
202415/07/2025
202329/04/2025
202229/04/2025
202129/04/2025
202015/10/2021

Filed on timeDelayFiling deadline

Data and insights are generated automatically from financial statements – they may contain errors and are neither a credit assessment nor business advice.

Statistics

How the company ranks by revenue within its industry, region and across Poland in 2025.

Results vs industry

Revenue

This companyUSD 137.16kMedianUSD 90.22kAverageUSD 771.34k

Net profit

This companyUSD 60.33kMedianUSD 106.01AverageUSD 31.91k

Operating costs

This companyUSD 75.57kMedianUSD 62.77kAverageUSD 563.67k

Assets

This companyUSD 361.18kMedianUSD 420.06kAverageUSD 3.48m

Industry

Authorized Representatives

Marcin Mazurkiewicz – Attorney-in-fact (sole)

Paula Sandra Mazurkiewicz – President of the Management Board

Manner of representation

In the case of a one-person management board, a member of the management board independently, and in the case of a multi-member management board, two members of the management board jointly, are authorised to make declarations of will on behalf of the company.

Ownership

Owner	Shares	Share value	Stake
Grażyna Ewa Mazurkiewiczage 67	50	$675.31	50%
Paula Sandra Mazurkiewiczage 39	50	$675.31	50%

Grażyna Ewa Mazurkiewicz and Paula Sandra Mazurkiewicz hold a combined 100% – the ownership structure indicates family control.

Beneficial owners

Person	Rights

Subsidiaries

	Name	Share value	Stake
	Heidensp. z o.o.	1,350.62 USD	100%
	Patro-Martinsp. z o.o.	1,350.62 USD	100%

Bank accounts

Registered as a VAT taxpayer on 2019-04-01.

mBank
93 1140 2004 0000 3602 7848 2000

Debt

No entries in the National Debtors Register (KRZ).

Public aid

Grant date	Purpose	Gross amount	Granting body
Jul 3, 2020	Aid compensating for the negative economic consequences of COVID-19, granted in limited amounts	$1,282$1,282	PREZYDENT MIASTA BYDGOSZCZ
Jun 20, 2020	Aid compensating for the negative economic consequences of COVID-19, granted in limited amounts	$521$521	Prezes Zakładu Ubezpieczeń Społecznych
May 30, 2020	Aid compensating for the negative economic consequences of COVID-19, granted in limited amounts	$521$521	Prezes Zakładu Ubezpieczeń Społecznych

Competitors

Name	Revenue	Website
Msretail Vsp. z o.o.	$986,951.10	msretail.pl
Nowa Przyszłośćsp. z o.o.	$759,814.79	nowa-przyszlosc.pl
Cyberofficesp. z o.o.	$36,723.59	cyberoffice.pl

Change history

Date	Event
2025-10-08	Address change (Ul. Toruńska 111, 85-844, Bydgoszcz → Ul. Dąbrowa 47, 85-147, Bydgoszcz)
2019-01-14	Address change (10, 89-333, Konstantynowo → Ul. Toruńska 111, 85-844, Bydgoszcz)
2019-01-14	Name change (Hot Agencja Reklamowa → Side)
2019-01-14	PKD change (Removed: 6 codes; Added: 10 codes)
2016-07-02	Business resumed

FAQ

Last updated: 2026-07-16