Onix Systems

What Onix-Systems does

Onix-Systems is a full-cycle web and mobile development company based in Kropyvnytskyi, Ukraine. Three founders, Roman Serebryakov, Edward Prykhodkin, and Dmitry Durach, started it in 2000 as a web development shop. The about page reports growth from 8 team members in 2002 to more than 370 employees in 2023. The directory record adds offices in Poznan, Poland and Bratislava, Slovakia.

The site now leads with custom IT services, product modernization, and AI-powered engineering. Service pages cover discovery and product strategy, UI/UX design, web and mobile apps, custom software, CRM and ERP work, and 24/7 support. Footer links add VR/AR development, 3D art, iOS development, UX audits, and two sub-brands, Onix Health and Onix Automation.

Travel and hospitality is the flagship vertical. Onix builds booking engines, reservation platforms, scheduling tools, recommendation engines, and fraud detection for travel companies. A separate software project rescue service offers a free audit, legacy modernization, refactoring, architecture redesign, and CTO-as-a-service for stalled projects.

Pricing and engagement

Onix-Systems does not publish prices on its site. The directory listing records an hourly rate of $25 to $49 and a minimum project size of $10,000. The agency's own About Ukraine page says Ukrainian firms generally charge $30 to $65 per hour, and it presents that as roughly half of US and Western European rates.

The typical engagement is a dedicated team that stays for years. The MisterB&B project lists 16 specialists working since 2015, and the digital health project lists 14 specialists since 2017. Homepage client videos cite teams of 8 to 10 developers over 2 to 10 years. The site states that 82 percent of clients return with new projects and that average retention is over three years. Rescue engagements start with a free audit, and the agency says it runs Agile with a dedicated project manager.

Who should hire Onix-Systems

The best fit is a funded startup or small business that wants a nearshore team to own a product for the long term. Every case study on the site is a multi-year dedicated team engagement, and the listed rate band is well below US agencies.

• Travel and hospitality companies, given the MisterB&B marketplace, the TravelBid booking app, and dedicated travel service pages.
• Owners of a stalled or inherited codebase. The rescue service starts with a free audit, and the site claims 87 percent of audits lead to a vendor change within 10 days.
• Teams that need AI, AR/VR, or 3D work alongside standard web and mobile development from one vendor.
• Buyers who want a large bench. The agency reports more than 370 employees and has fielded 16-person project teams.

Who should look elsewhere

The directory listing notes that some client reviews mention occasional language barriers with developers, and that Ukraine-based delivery needs contingency planning for wartime risk. The site's About Ukraine page addresses wartime operations directly, but the buyer still carries that risk.

• Companies that need a fixed price before a first call. No prices or packages are published.
• Buyers with budgets under $10,000, which is the listed minimum.
• Teams that want a narrow specialist. The service list spans ERP, VR, 3D art, and AI, which the listing flags as breadth over depth.

Track record and signals

MisterB&B is the anchor case study. Onix has supported the French LGBTQ travel marketplace since 2015 with a 16-person team, migrating it to Ruby on Rails and React, adding search across more than 2 million listings, and integrating fraud detection and Stripe, PayPal, Payoneer, and Adyen payments. The site reports 900,000 members and 1 million accommodations in 200 countries.

An Australian digital health client has used a 14-person Onix team since 2017 to rebuild a white-label home care platform, with six branded apps now live. Stridist, a US fitness coaching platform, got a new architecture on Amazon ECS. A US skincare app built in Python with TensorFlow and PyTorch has analyzed more than 45,000 products, according to the case study.

Video testimonials on the homepage come from Keith Scioli of Golf Live, Eoin Le Masney and Jack Dwyer of Vyra, Tal Revivo of Adoric, and Ryan Rosenbaum of Phlex. The Adoric relationship is stated at more than 10 years. Google shows a 4.8 rating from 68 reviews, and the listing records 52 Clutch reviews at 4.8. The about page has an awards heading with nothing listed under it.

How Onix-Systems compares

Against other software agencies in this directory, Onix's $25 to $49 rate sits at the low end, and its 25-year history and 370-person headcount make it one of the larger Eastern European shops listed. Most peers at this rate are smaller and younger. Its distinguishing features are the travel vertical, the rescue service with a free audit, and the retention figures it publishes. Its gaps are the lack of published pricing, wartime delivery risk, and homepage statistics that cannot be verified from outside.