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Result-Driven Process ⭐ 150+ Successful Projects ⭐

For over ten years Selleo has delivered professional services on more than 150+ software development projects for clients from Europe, the US, Canada, and Australia, designing and building a number of applications throughout a wide spectrum of business domains, industries, and technologies (Ruby on Rails, ReactJS, React Native, EmberJS, Elixir).

Extend your in-house team

  • Min project size
    $10,000+
  • Hourly rate
    $25 - $49 / hr
  • Employees
    50 - 249
  • Locations
    Bielsko-Biała, Poland
  • Year founded
    Founded 2005
  • Languages
  • Timezones

1 Language that we service

  • English

1 Timezone that we service

CET
Central European Time (CET)

2 Locations

  • Bielsko-Biała , Poland
  • Bielsko-Biała , Poland

No have been added yet...

    Pricing Snapshot

    Min. project size $10,000+
    Avg. hourly rate $25 - $49 /hr
    Rating for cost 4.5 /5

    What Clients Have Said

    Selleo provides competitive pricing with good value for cost, as noted by clients. Project costs range from $20,000 to over $500,000, depending on scope and client size. Clients appreciate Selleo's quality, communication, and project management, often highlighting their ability to deliver on time and within budget.

    This summary is based on verified Clutch reviews.

    Most Common Project Size

    $50,000 - $199,999 based on 23 reviews
    < $49,999 $50,000 - $199,999 $200,000 - $999,999 > $1,000,000

    Select a service to see pricing information

    Selleo Review Insights

    Overall Review Rating

    4.7
    • Quality 4.6
    • Schedule 4.5
    • Cost 4.5
    • Willing to Refer 4.7

    Top Mentions

    Review Highlights

    • Proficiency in Custom Software Development

      Selleo is recognized for its expertise in developing custom software solutions across various industries. Clients appreciate their ability to create tailored applications that address specific business challenges, ensuring scalability, security, and user-friendliness.

    • Responsive and Adaptive to Client Needs

      Clients appreciate Selleo's responsiveness and adaptability, highlighting their ability to quickly adjust to changing requirements and challenges. This flexibility is seen as a key strength in their service delivery.

    • High-Quality Technical Output

      Clients frequently highlight the high quality of Selleo’s technical work, noting their ability to deliver reliable, maintainable, and well-tested code. Their proficiency in technologies like Ruby on Rails, React.js, and Python is particularly noted.

    • Strong Project Management Skills

      Many clients commend Selleo for their effective project management, timely deliveries, and clear communication. They employ agile methodologies and maintain regular updates through tools like Slack and Trello, ensuring alignment and responsiveness.

    • Commitment to Client Success

      Selleo's team is praised for their dedication and proactive approach to understanding and meeting client needs. They are seen as invested partners, often going beyond scope to ensure project success and client satisfaction.

    • Room for Improvement in Estimating Procedures

      Some clients suggest that Selleo could enhance their estimating procedures and deepen their understanding of certain business markets to better support client objectives and timelines.

    Selleo Reviews

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    Services
    Project cost

    Development for a Property Management Platform

    • Custom Software Development
    • $200,000 to $999,999
    • Mar. 2017 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    4.5
    Cost
    4.5
    Willing to Refer
    5.0

    "We appreciate how invested Selleo is in our product."

    Dec 4, 2019
    CTO & Co-Founder, Breezeway
    Nate Oaks
    Verified
    • Other industries
    • Boston, Massachusetts
    • 11-50 Employees
    • Phone Interview
    • Verified

    Supplementing resources in-house, the team at Selleo provides development support for a software startup. The team developed and designed a React web platform and native mobile application.

    Development for a Commerce Company

    • Custom Software Development
    • $200,000 to $999,999
    • June 2016 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    “After three years with the team, we still enjoy working together.”

    Aug 21, 2019
    Founder, BrandActif
    Anonymous
    Verified
    • Other industries
    • United Kingdom
    • 1-10 Employees
    • Phone Interview
    • Verified

    Selleo developed a custom platform for a visual commerce company. Their team created a web app and an API using Ruby on Rails and Javascript.

    Near-Shore Development Services for SaaS Collaboration Tool

    • Web Development
    • $200,000 to $999,999
    • Jan. 2015 - Ongoing
    5.0
    Quality
    4.5
    Schedule
    4.5
    Cost
    4.5
    Willing to Refer
    5.0

    "...they are actively working together with us to make both our processes and software better and better."

    Jul 30, 2019
    Founder, 9TEAMS
    Piet Neirinck
    Verified
    • Other industries
    • Belgium
    • 1-10 Employees
    • Online Review
    • Verified

    Working in tandem with the internal team, Selleo has developed a SaaS platform using EmberJS and Elixir. They've architected the solution, built out features, and designed landing pages/marketing collateral. 

    Development for an eSports Platform

    • Custom Software Development
    • $200,000 to $999,999
    • Jan. 2016 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "We value their opinion, and they respond by going the extra mile to optimize our product." 

    Feb 19, 2019
    CPO, Battleriff Gaming AB
    Tom Smith
    Verified
    • Other industries
    • Sweden
    • 1-10 Employees
    • Phone Interview
    • Verified

    Selleo developed an e-sports solution using React and Ruby on Rails. They helped implement the platform’s design and provided GDPR data consulting. They now act as an ongoing development partner.

    Development for a Startup Incubator

    • Custom Software Development
    • $50,000 to $199,999
    • Aug. 2018 - Ongoing
    4.5
    Quality
    5.0
    Schedule
    5.0
    Cost
    4.5
    Willing to Refer
    4.5

    “Selleo holds themselves to a high standard that I’ve rarely seen in agencies.”

    Jan 18, 2019
    Managing Director, WATTx
    Anonymous
    Verified
    • Other industries
    • Berlin, Germany
    • 11-50 Employees
    • Phone Interview
    • Verified

    Selleo developed a backend and data pipeline using Python to manage an array of data sources from a third-party client’s external system. They also built a React app to host a customer dashboard on mobile.

    Development for a Moving Service

    • Custom Software Development
    • $50,000 to $199,999
    • Feb. - July 2017
    4.0
    Quality
    4.0
    Schedule
    5.0
    Cost
    4.0
    Willing to Refer
    4.0

    “With Selleo, the entire development process was quite open and lean.”

    Jan 16, 2019
    Chief Digital Officer, Movinga
    Dennis Gneuss
    Verified
    • Other industries
    • Berlin, Germany
    • 201-500 Employees
    • Phone Interview
    • Verified

    Selleo assisted with frontend and backend development for an online moving company’s digital system. They worked with Ruby on Rails and React.js technology to update the backend and make changes to the UI.

    Software Development for Startup Venture Fund

    • Custom Software Development
    • $200,000 to $999,999
    • Apr. 2017 - Ongoing
    4.5
    Quality
    4.0
    Schedule
    4.0
    Cost
    3.0
    Willing to Refer
    5.0

    “The products have minimal bugs, and I’m happy with the quality of their work.”

    Nov 27, 2018
    Product Lead, Venture Fund
    Anonymous
    Verified
    • Financial services
    • Phone Interview
    • Verified

    Selleo augments the existing dev team to work on various software projects. They’re currently building two web-based products, focusing on the frontend. They also provide support for the backend developers.

    Web Development for VPN Service Provider

    • Web Development
    • Confidential
    • Jan. 2017 - July 2018
    5.0
    Quality
    5.0
    Schedule
    n/a
    Cost
    4.0
    Willing to Refer
    5.0

    “Selleo is profoundly talented in the Ruby on Rails area.”

    Oct 31, 2018
    CTO, ZenGuard
    Jörn Stampehl
    Verified
    • Information technology
    • Berlin, Germany
    • 11-50 Employees
    • Phone Interview
    • Verified

    Selleo provided development staff augmentation to help increase a VPN service provider’s pace and meet target deadlines. Based on a code review, they gave input and made updates to enhance the UX of the API.

    Frontend UI Dev for AdTech Firm

    • Web Development
    • $50,000 to $199,999
    • Jan. 2017 - Jan. 2018
    5.0
    Quality
    4.5
    Schedule
    4.5
    Cost
    5.0
    Willing to Refer
    4.5

    “They outperformed any other contractor we’ve worked with.”

    Oct 10, 2018
    Technical Product Manager, AdTech Firm
    Anonymous
    Verified
    • Advertising & marketing
    • Berlin, Germany
    • 11-50 Employees
    • Phone Interview
    • Verified

    Selleo built the frontend UI in Triangular.js for an AdTech company. Working off of provided wireframes and designs, they augmented the in-house team and resolved architectural, CSS, and algorithmic issues.

    Web Development for Business Consultancy

    • Web Development
    • Confidential
    • May 2016 - Ongoing
    4.5
    Quality
    4.0
    Schedule
    4.5
    Cost
    4.0
    Willing to Refer
    4.5

    “They’re interested in our feedback, proactively finding ways to improve.”

    Sep 14, 2018
    CTO, International Business Consultancy
    Anonymous
    Verified
    • Advertising & marketing
    • Berlin, Germany
    • 51-200 Employees
    • Online Review
    • Verified

    Joining the internal team, Selleo writes and reviews code, and provides suggestions that guide the product’s technical architecture, implementation strategies, and development processes on an ongoing basis.

    Showing 11-20 of 35 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
    35
    Overall Review Rating
    4.7
    Source
    Clutch
    Last Updated
    December 22, 2025

    Business Entity

    Business Entity Name Selleo Labs Sp. z o.o.
    Source Central Statistical Office of Poland
    Jurisdiction of Formation Poland
    Date of Formation October 13, 2021
    Status Active
    Last Updated July 8, 2025
    ID 0000925982

    Credit Report Results

    International Credit Risk Assessment Low Risk
    Source Creditsafe
    Last Updated July 8, 2025
    Learn More About The Clutch Verification Process

    Locations (2)

    Powstańców Śląskich 3 Bielsko-BiałaPoland 43-300

    50 - 75

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