AGENCY LIST

Selleo

Bielsko-Biala, Silesia, Poland
Visit selleo.com

Custom software development for EdTech and HRTech solutions

Selleo is a software development partner headquartered in Poland, specializing in custom web and mobile solutions. Since 2005, they have been crafting software for clients globally, focusing on industries such as EdTech, HRTech, and SaaS. Their team of over 100 developers, designers, and tech leads work collaboratively to transform complex ideas into scalable digital solutions.

Selleo offers a range of services including custom software development, DevOps, SaaS development, and UX/UI design. They emphasize a full-cycle product development approach, from discovery and scoping to design, development, testing, and launch. Their process includes rapid prototyping for validation and AI integration to enhance product functionality and user experience.

Clients appreciate Selleo's quality, communication, and proactive approach. They are recognized for building lasting partnerships and delivering value through structured, transparent, and predictable execution. Their expertise in creating learning management systems and HR technology solutions helps organizations scale development and improve performance.

21
YEARS IN BUSINESS
1
SERVICE

Capabilities

Category

Custom Software Development

Services

Agency details

Team size
51-200 people
Founded
2005 (21 years)

About this agency on Agency List

Selleo holds an Agency List Score of 96 out of 100.

That score is higher than 88% of the 36,920 agencies Agency List has assessed so far.

The Agency List Score measures how well an agency documents its work in public: named clients, quantified outcomes, and whether those outcomes are attributed to the agency rather than to the client.

It does not measure client satisfaction, price, or availability.

How the Agency List Score is measured

Assessment date

Agency List assessed Selleo in September 2026, reading 8 pages published on selleo.com.

The score reflects what Selleo had published by that date; anything published since has not been read.

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