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We are Power People!

Sii Poland is the leading technology consulting, digital transformation, engineering, and business services vendor in Poland. We started as a one-person startup in 2006. Now, we have a team of 7 500+ experts, operating from 14 offices in Poland and 3 offices abroad (Sweden, Ukraine, India).

  • Min project size
    Undisclosed
  • Hourly rate
    Undisclosed
  • Employees
    1,000 - 9,999
  • Locations
    Warszawa, Poland
  • Year founded
    Founded 2006
  • Languages
  • Timezones

9 Languages that we service

  • Polish
  • English
  • Swedish
  • Ukrainian
  • German
  • Dutch
  • Finnish
  • French
  • Norwegian

3 Timezones that we service

IST
India Standard Time (IST)
EET
Eastern European Time (EET)
CET
Central European Time (CET)

14 Locations

  • Warszawa , Poland
  • Gdańsk , Poland
  • Wrocław , Poland
  • Poznań , Poland
  • Kraków , Poland
  • Łódź , Poland
  • Lublin , Poland
  • Katowice , Poland
  • Rzeszów , Poland
  • Piła , Poland
  • Bydgoszcz , Poland
  • Białystok , Poland
  • Szczecin , Poland
  • Toruń , Poland

No Focus Areas have been added yet…

Industries
Financial services
20%
Medical
15%
Retail
15%
Automotive
10%
Information technology
10%
Manufacturing
10%
Telecommunications
10%
Media
5%
Utilities
5%
Clients
Enterprise (>$1B)
75%
Midmarket ($10M - $1B)
20%
Small Business (<$10M)
5%

Pricing Snapshot

Min. project size Undisclosed
Avg. hourly rate Undisclosed
Rating for cost 4.8 /5

What Clients Have Said

Sii Poland is noted for providing good value for cost, with pricing fitting client budgets across various projects. Clients frequently highlight their strong technical skills, flexibility, and effective project management, ensuring timely delivery and responsiveness to needs.

This summary is based on verified Clutch reviews.

Most Common Project Size

$50,000 - $199,999 based on 12 reviews
< $49,999 $50,000 - $199,999 $200,000 - $999,999 > $1,000,000

Select a service to see pricing information

Sii Poland Review Insights

Overall Review Rating

4.9
  • Quality 4.9
  • Schedule 4.9
  • Cost 4.8
  • Willing to Refer 5.0

Top Mentions

Review Highlights

  • Room for Improvement in Proactive Initiative

    Some clients suggest that Sii Poland could enhance their proactive initiative by offering more suggestions and alternatives based on their experience, especially in design and strategic decisions.

  • High Client Satisfaction and Positive Outcomes

    Many clients report high satisfaction with Sii Poland's services, citing successful project outcomes, improved processes, and business growth. Their work often leads to extended contracts and ongoing partnerships.

  • Business-Oriented and Value-Driven Approach

    Clients appreciate Sii Poland's business-oriented mindset, focusing on delivering tangible business value and aligning their technical efforts with the client's strategic goals.

  • Strong Communication Skills

    Clients highlight Sii Poland's excellent communication skills, noting their ability to maintain consistent and transparent communication throughout projects, enhancing collaboration and alignment.

  • Positive Feedback on CRM and E-commerce Solutions

    Sii Poland has successfully implemented CRM and e-commerce solutions, with clients praising the enhanced functionality, user-friendliness, and business impact these solutions have provided.

  • Effective Project Management

    Clients commend Sii Poland for their solid project management skills, delivering projects on time and maintaining clear communication. Their proactive approach and responsiveness to client needs are frequently highlighted.

Sii Poland Reviews

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Atlassian Products Setup & Maintennce for R&D Company

  • IT Managed Services
  • Managed Software Application & Solutions
    +1
  • Confidential
  • Jan. 2024 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"We've had zero issues with the Atlassian support."

Sep 30, 2025
Procurement Manager, R&D Company
Oleksii
Verified
  • Other industries
  • Ukraine
  • 501-1,000 Employees
  • Online Review
  • Verified

Sii Poland has been hired by an R&D company to set up and maintain Atlassian products. The goal is to provide support for Atlassian products.

Custom Software Development for Scientific Research Company

  • Web Development
  • Google app engine
  • Confidential
  • Apr. - June 2025
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"It impressed us that they were so helpful, responsive, and knowledgeable."

Sep 30, 2025
Technical Director, aMuze Interactive
Christer Granberg
Verified
  • Other industries
  • Stockholm, Sweden
  • 1-10 Employees
  • Online Review
  • Verified

Sii Poland developed a reporting platform for a scientific research company. The team used Google Analytics, Google Tag Manager, and Looker Studio to build the platform.

IT Consulting & SI for Frozen Food Manufacturer

  • Cloud Consulting & SI ERP Consulting and SI Other IT Consulting and SI
  • SAP ERP Consulting & Implementation
  • $50,000 to $199,999
  • Jan. 2021 - Sep. 2025
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"Their good contact, flexibility, responsiveness, and valuable consultants impressed us."

Sep 29, 2025
IT Manager, FRoSTA
Przemyslaw Jezierski
Verified
  • Other industries
  • Bydgoszcz, Poland
  • 1,001-5,000 Employees
  • Online Review
  • Verified

Sii Poland provided SAP S/4HANA support and system development services for a frozen food manufacturer. The team also provided IT infrastructure field services and support for S/4HANA upgrades.

IT Staff Augmentation for Industrial Automation Company

  • Computer Engineering IT Staff Augmentation
  • Confidential
  • Jan. 2023 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
4.5
Willing to Refer
5.0

"Everything is ok."

Sep 29, 2025
Department Manager, Rockwell Automation Sp. z o.o.
Anonymous
Verified
  • Other industries
  • Katowice, Poland
  • 1,001-5,000 Employees
  • Online Review
  • Verified

Sii Poland provides IT staff augmentation services for an industrial automation company. The team has been tasked with providing development work and architectural support.

Web Dev & Penetration Testing Staff Aug for FinTech Company

  • Application Testing IT Staff Augmentation Web Development
  • $1,000,000 to $9,999,999
  • July 2022 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"They're very easy to work with."

Sep 22, 2025
Director of Software Engineering, Infront AS
Elise Stasiuk
Verified
  • Financial services
  • Oslo, Norway
  • 201-500 Employees
  • Online Review
  • Verified

Sii Poland provides staff augmentation services for a fintech company. The team handles tasks related to the client's OMS product suite, including web development, penetration testing, and machine learning.

Engineering QA & Testing for Enterprise Software Vendor

  • Application Testing Digital Engineering
  • Acceptance Testing
    +12
  • Confidential
  • Jan. 2016 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"They had exceptional skills."

Sep 22, 2025
Alliance Director, Tricentis
Michael Weiss
Verified
  • Other industries
  • Zuerich, Switzerland
  • 1,001-5,000 Employees
  • Online Review
  • Verified

Sii Poland provides software quality engineering services to an enterprise software vendor. The team handles testing consulting, QA, performance testing, and other related tasks.

End-User IT Support Services for Banking Company

  • Computer Engineering IT Managed Services IT Staff Augmentation
  • Help desk
    +1
  • Confidential
  • May 2022 - May 2029
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"Their professionalism and flexible approach toward our needs are impressive."

Sep 22, 2025
IT, Banking Company
Anonymous
  • Banks
  • Poland
  • 501-1,000 Employees
  • Online Review

Sii Poland provides IT support for a banking company. The team provides technical support and maintenance for end-user devices. They handle all aspects of ensuring smooth break/fix and IMAC cases.

Custom Software Development for IT Services Company

  • Custom Software Development
  • Other app platform
  • Confidential
  • Jan. 2025 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
4.0
Willing to Refer
5.0

"We have a trustworthy relationship with Sii Poland."

Sep 19, 2025
General Manager, IT Services Company
Tomasz Manugiewicz
  • Other industries
  • Krakow, Poland
  • 1-10 Employees
  • Online Review

Sii Poland has worked on an IT services company’s engineering platforms. The team has worked on the client’s sports, gaming, data, and AI automation domains and produced components for their platforms.

Data Platform Dev for Nutrition Products Co

  • BI & Big Data Consulting & SI Custom Software Development
  • Power BI & data solutions
    +3
  • Confidential
  • Sep. 2018 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"I would highlight their long-term perspective and collaboration."

Sep 8, 2025
Senior VP, Aker BioMarine ASA
Ole Thoresen
Verified
  • Other industries
  • Oslo, Norway
  • 51-200 Employees
  • Online Review
  • Verified

Sii Poland has helped a nutrition products company create a unified data platform. The team has developed business intelligence reports on top of the platform for the client's various business areas.

CRM Consulting & SI for Education Company

  • CRM Consulting and SI
  • Confidential
  • Jan. 2023 - June 2025
5.0
Quality
4.5
Schedule
5.0
Cost
4.5
Willing to Refer
5.0

"We had a close and good collaboration with them."

Sep 4, 2025
Former CTO, Education Company
Anonymous
Verified
  • Education
  • Kristiansand, Norway
  • 51-200 Employees
  • Online Review
  • Verified

Sii Poland developed a Salesforce environment for an education company. The team was responsible for customizing the platform based on the client's business needs and rules.

Showing 31-40 of 42 Reviews

Clutch verification provides an additional layer of data to help you make the right purchasing decision of business services.

Learn More
Verified Client Reviews
36
Overall Review Rating
4.9
Source
Clutch
Last Updated
March 16, 2026

Business Entity

Business Entity Name SII Sp. z o.o.
Source Poland Central Statistical Office
Jurisdiction of Formation Poland
Date of Formation January 17, 2006
Status Active
Last Updated July 24, 2025
ID 0000249203

Credit Report Results

International Credit Risk Assessment Very Low Risk
Source Creditsafe
Last Updated July 24, 2025
Learn More About The Clutch Verification Process

Locations (14)

Niepodleglosci 69 Av. WarszawaPoland 02-626

1001 - 2000

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Aker BioMarine

(1)
Aker BioMarine Logotype

Ole Thoresen

Amcor

(1)
Amcor Logotype

Mateusz Pawlak

Aptiv

(2)
Aptiv Logotype

Jaroslaw Lasek

Aptiv Logotype

Paweł Madej

Danone

(1)
Danone Logotype

Patryk Hyla

Diagnostyka.pl

(1)
Diagnostyka.pl Logotype

Bartosz Skłodowski

Displate

(1)
Displate Logotype

Wojciech Wiktorowicz

FRoSTA

(1)
FRoSTA Logotype

Przemyslaw Jezierski

Gadre Infotech Pvt. Ltd.

(1)
Gadre Infotech Pvt. Ltd. Logotype

Shalaka Teli

Infront

(1)
Infront Logotype

Elise Stasiuk

Ingenico

(1)
Ingenico Logotype

Eric de Taevernier

Omnilogy

(1)
Omnilogy Logotype

Tomasz Plonski

Sii Poland

(1)
Sii Poland Logotype

Szymon Wróblak

Teatr Muzyczny w Gdyni

(1)
Teatr Muzyczny w Gdyni Logotype

Mateusz Gigiewicz

The City of Reykjavik

(1)
The City of Reykjavik Logotype

Halldor Gislason

Trapeze Group

(1)
Trapeze Group Logotype

Harinder Singh Bora

Tricentis

(1)
Tricentis Logotype

Michael Weiss

WSA – Wonderful Sound for All

(1)
WSA – Wonderful Sound for All Logotype

Saket arora

Additional Connections

(10)