App Development Company

Kolosek

Software agency building AI-powered products, custom AI agents and full-stack web and mobile applications

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TrustList summary

Kolosek is a software agency that now builds AI-powered products, from custom AI agents to full-stack web and mobile development. It takes projects from discovery and planning through to deployment, monitoring and ongoing updates, and clients keep full ownership of the code.

What Kolosek offers

Custom AI agents: autonomous agents designed around a client's domain and workflows.
Model integration: commercial and open-source language models built into products.
Rapid prototyping: turning an idea into a working prototype in days.
Automation and data pipelines: AI-ready API and data infrastructure that removes manual bottlenecks.
Full-stack product engineering: products built with Rails, React and other stacks, including CI/CD and monitoring.
Developer tools: its own products for Ruby on Rails CI, automated GitHub code review and code transparency.

Customers and markets

Kolosek works with startups and enterprises. Past work includes a marketplace in the Netherlands for second-hand designer brands, a sexual wellness platform and a virtual classroom app with live streaming.

Key facts

Certifications: ISO 9001 and ISO 27001
Engineering: senior engineers with experience in LLMs, RAG, fine-tuning and production ML

Summary written by TrustList from the business's own published information, Sep 2026.

Categories & features

Rankings

Kolosek is ranked on 2 TrustList rankings: #32 on 1 and #40 on 1.

Every ranking orders its listings by their reviews, how complete the profile is and the Trust Score. Kolosek has no reviews yet and 3 of the 10 profile details we look for. Where no listing on a page has been reviewed, the order follows the profiles alone.

App development company · 2 rankings

#32of 278
React
It is one of 3 here listing RubyonRails and one of 8 here listing arts, entertainment & music.
Its profile: “- Full-stack product engineering: products built with Rails, React and other stacks, including CI/CD and monitoring.”
Of the top 82 here, 50 also cover android and 44 also cover eCommerce; 6 also work in Ahmedabad and 4 also work in Delhi NCR.
Behind HDWEBSOFT, ahead of Foresight Mobile.
#40of 45
Rubyonrails
It is one of 5 here listing advertising & marketing and one of 6 here listing real estate.
Of the 45 here, 42 also cover web development and 41 also cover mobile app development; 2 also work in Silicon Valley.
Behind CoDefyne, ahead of Owebest Technologies Pvt. Ltd..