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We Provide Full Scope Mobile Development Expertise

Onix is a full-cycle software development company that builds well-suited solutions to drive company outcomes for startups, small and medium-sized businesses.

1100+  Successfully delivered projects
23+  Years of experience in software development
55+ Countries represented by clients
370+ Talented multi‑dimensional experts

  • Min project size
    $10,000+
  • Hourly rate
    $25 - $49 / hr
  • Employees
    250 - 999
  • Locations
    Kropyvnytskyi, Ukraine
  • Year founded
    Founded 2000
  • Languages
  • Timezones

2 Languages that we service

  • English
  • Ukrainian

38 Timezones that we service

ACT
Australia Central Time (ACT)
AGT
Argentina Standard Time (AGT)
AKST
Alaska Standard Time (AKST)
ART
(Arabic) Egypt Standard Time (ART)
AST
Arabia Standard Time (AST)
AET
Australia Eastern Time (AET)
BST
Bangladesh Standard Time (BST)
BET
Brazil Eastern Time (BET)
CAT
Central African Time (CAT)
CET
Central European Time (CET)
CNT
Canada Newfoundland Time (CNT)
COT
Colombia Time (COT)
CST
Central Standard Time (CST)
CTT
China Taiwan Time (CTT)
EAT
Eastern African Time (EAT)
EST
Eastern Standard Time (EST)
EET
Eastern European Time (EET)
GMT
Greenwich Mean Time (GMT)
GST
Gulf Standard Time (GST)
HST
Hawaii Standard Time (HST)
IDT
Israel Daylight Time (IDT)
IET
Indiana Eastern Standard Time (IET)
IST
India Standard Time (IST)
JST
Japan Standard Time (JST)
MET
Middle East Time (MET)
MIT
Midway Islands Time (MIT)
MST
Mountain Standard Time (MST)
NET
Near East Time (NET)
NST
New Zealand Standard Time (NST)
PNT
Phoenix Standard Time (PNT)
PRT
Puerto Rico and US Virgin Islands Time (PRT)
PST
Pacific Standard Time (PST)
PLT
Pakistan Lahore Time (PLT)
SAST
South African Standard Time (SAST)
SGT
Singapore Standard Time (SGT)
SST
Solomon Standard Time (SST)
UTC
Universal Coordinated Time (UTC)
VST
Vietnam Standard Time (VST)

3 Locations

  • Kropyvnytskyi , Ukraine
  • Poznań , Poland
  • Bratislava , Slovakia

No have been added yet...

    Pricing Snapshot

    Min. project size $10,000+
    Avg. hourly rate $25 - $49 /hr
    Rating for cost 4.8 /5

    What Clients Have Said

    Onix-Systems is perceived as offering good value for cost, with several clients noting that their pricing fits budgets while delivering quality work. Specific project costs range from $5,000 to over $192,000, indicating flexibility for different client sizes and needs.

    This summary is based on verified Clutch reviews.

    Most Common Project Size

    $10,000 - $49,999 based on 39 reviews
    < $10,000 $10,000 - $49,999 $50,000 - $199,999 > $200,000

    Select a service to see pricing information

    Onix-Systems Review Insights

    Overall Review Rating

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

    Top Mentions

    Review Highlights

    • Dependable and Flexible

      Onix-Systems is recognized for their reliability and flexibility, often adjusting team composition and project scope to meet client needs. Their willingness to innovate and adapt is frequently highlighted as a key strength.

    • Strong Client Relationships

      Clients often mention feeling like partners rather than just customers, thanks to Onix-Systems' focus on relationship-building. Their personal approach and dedication to client success are frequently praised.

    • Impressive Technical Innovation

      Onix-Systems has been able to deliver innovative solutions, particularly in areas like VR and mobile app development, where others have struggled. Their capacity to tackle unprecedented challenges is a noted strength.

    • Communication Challenges

      While many clients appreciate Onix-Systems' communication, a few noted language barriers and occasional miscommunications. Improving English proficiency, especially among developers, could enhance client interactions.

    • Commitment to Quality and Client Success

      Onix-Systems is committed to delivering high-quality products and ensuring client success. Their dedication to maintaining high standards is consistently recognized by their clients.

    • High Technical Expertise

      Clients commend Onix-Systems for their technical proficiency across various domains, including VR, mobile app development, and web development. They are particularly noted for overcoming complex technical challenges that other firms found impossible.

    Onix-Systems Reviews

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    Project cost

    Front End App Dev & UI/UX Design for Fin Tech Company

    • Mobile App Development UX/UI Design Web Development
    • $50,000 to $199,999
    • Mar. 2021 - Ongoing
    4.5
    Quality
    4.5
    Schedule
    4.0
    Cost
    5.0
    Willing to Refer
    4.5

    "Beyond their competency and straightforward execution of tasks, I like their flexibility." 

    Apr 5, 2022
    Head of Product, Fin Tech Company
    Anonymous
    Verified
    • Other industries
    • Zuerich, Switzerland
    • 1-10 Employees
    • Phone Interview
    • Verified

    Onix-Systems provides ongoing software development, including UI/UX creation and frontend application development. They work in React Native and have delivered iOS and Android solutions as well. 

    Software Development for Learning Software Company

    • Custom Software Development
    • Confidential
    • Oct. 2019 - Ongoing
    4.5
    Quality
    4.5
    Schedule
    4.0
    Cost
    4.0
    Willing to Refer
    5.0

    "They’ve been diligent and have good technical individuals in their team."

    Feb 2, 2022
    Executive, Learning Software Company
    Anonymous
    Verified
    • Other industries
    • United Kingdom
    • 201-500 Employees
    • Phone Interview
    • Verified

    A learning software company hired Onix-Systems to provide software development. Their efforts involve front- and backend development, along with data aggregation for multiple training platforms.

    UI/UX Design for Data Science & PostgreSQL Company

    • UX/UI Design
    • $50,000 to $199,999
    • Feb. 2020 - Feb. 2021
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "The project was very well treated by the team."

    Jan 31, 2022
    PostgreSQL Expert, CYBERTEC
    Pavlo Golub
    Verified
    • Other industries
    • Austria
    • 51-200 Employees
    • Online Review
    • Verified

    A PostgreSQL database company hired Onix-Systems to design the UI/UX of their platform. The team used React.js on the frontend and Node.js on the middleware, designing and implementing the UI section by section.

    Website & App Redesign for Gaming Platform

    • Web Development
    • $50,000 to $199,999
    • June - Dec. 2021
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "They always went above and beyond and really viewed themselves as an extension of our company's team."

    Jan 12, 2022
    CEO, Bracketology, LLC
    Jonah Fialkow
    Verified
    • Gaming
    • Chicago, Illinois
    • 1-10 Employees
    • Online Review
    • Verified

    A fantasy gaming platform hired Onix-Systems, LLC to redevelop their website and application. The team did large-scale work on AWS and delivered a completely repackaged design for the project.

    iOS App Development for Beauty Company

    • Mobile App Development
    • Confidential
    • Feb. 2020 - Mar. 2021
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "We value their availability, flexibility, and eagerness to do their best in what they do."

    Dec 3, 2021
    CTO, Beauty Company
    Anonymous
    Verified
    • Other industries
    • San Diego, California
    • 11-50 Employees
    • Online Review
    • Verified

    Onix-Systems, LLC developed an iOS app for a beauty company. Their goal was to develop the app as fast as possible while keeping it reliable and bug-free.

    Web Dev & UI/UX Design for Alcohol Brand

    • UX/UI Design Web Development
    • Less than $10,000
    • Feb. - Apr. 2021
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "Onix-Systems was already helping me out with different problems without me even paying them."

    Jun 3, 2021
    Owner, SQEEZ
    LaRoy Richardson
    Verified
    • Other industries
    • Washington, District of Columbia
    • 11-50 Employees
    • Phone Interview
    • Verified

    An alcohol brand hired Onix-Systems, LLC to build and develop a user-friendly website. They were also responsible for designing the layout and logo of the company.

    Web Dev for Paddle Tennis Education Platform

    • Web Development
    • $10,000 to $49,999
    • June 2020 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "We are impressed with their professionalism and transparency in their work."

    Feb 9, 2021
    CEO, MiPaddle
    Mark Innes
    Verified
    • Education
    • New York City, New York
    • 1-10 Employees
    • Online Review
    • Verified

    Onix-Systems, LLC was hired by a paddle tennis educational platform to produce a website and maintain it after. The main objective is to manage end users and continuously update the content of the site.

    UI/UX Design Projects for IT Outsourcing Company

    • Other Design UX/UI Design
    • $50,000 to $199,999
    • Jan. 2020 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "The fact that we continue to send work their way speaks volumes about their quality of work."

    Feb 4, 2021
    Strategist, Aloa
    David Pawlan
    Verified
    • Other industries
    • Chicago, Illinois
    • 1-10 Employees
    • Online Review
    • Verified

    Onix-Systems, LLC was hired by an outsourcing company to collaborate with them on several software development projects. The team is tasked to generate applications using UI/UX designs and existing templates.

    iOS Mobile App Dev. for Messaging Service Platform

    • Custom Software Development
    • $50,000 to $199,999
    • Dec. 2016 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    “Their outstanding ability to solve extreme technical challenges distinguishes them from their competitors.”

    Mar 30, 2018
    CEO, messageLOUD
    Garin Toren
    Verified
    • Arts, entertainment & music
    • Albany, New York
    • 11-50 Employees
    • Phone Interview
    • Verified

    Onix-Systems used an existing wireframe to create an iOS app that reads aloud messages as they’re received. They’ve developed the backend of the app. Currently, they’re building a public beta version.

    Coding for Fitness Startup

    • Web Development
    • $10,000 to $49,999
    • Jan. 2016 - Ongoing
    4.0
    Quality
    4.0
    Schedule
    4.5
    Cost
    3.5
    Willing to Refer
    4.5

    "From what I've seen, the code produced by Onix was very clean and efficient."

    Sep 13, 2016
    Co-owner, Fitness Startup
    Anonymous
    Verified
    • Other industries
    • Montreal, Quebec
    • 1-10 Employees
    • Phone Interview
    • Verified

    Onix-Systems is engaged to create a strong coding base for the client's core platform allowing users to access videos and information.

    Showing 21-30 of 49 Reviews

    Our Story

    Onix was founded in 2000 by three technology enthusiasts: Roman Serebryakov, Edward Prykhodkin, and Dmitry Durach.

    Onix has always focused on building honest, transparent relationships with customers. We prioritize the evolving, unique customer nee

    The executives’ goal is to secure Onix’s membership in the global business community and our status as a reliable and profitable partner. The executive team guides Onix with a focus on consistent excellent customer experience and continuous education.

    What Sets Us Apart

    Openness

    Transparent, client-first partnership. We keep the process open, guard your IP, adapt to evolving needs, and work comfortably across time zones—so delivery stays clear, flexible, and aligned from discovery to release.

    Support

    Learning-led excellence since 2000. From 8 engineers to 370+ specialists, we’ve grown profitably and steadily. We invest in continuous education and emerging tech, so your product benefits from proven craft and fresh ideas.

    Uniqueness

    Values you can feel. We embrace new ideas, appreciate creativity, respect every voice, and support growth. That culture—plus global experience—creates teams that care, stay reliable, and build long-term results with you.

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

    Learn More
    Verified Client Reviews
    43
    Overall Review Rating
    4.8
    Source
    Clutch
    Last Updated
    September 23, 2025

    Business Entity

    Business Entity Name Onix-Systems Limited Liability Company
    Source Youcontrol
    Jurisdiction of Formation Ukraine
    Date of Formation December 25, 2001
    Status Active
    Last Updated March 31, 2022
    ID 31774976

    Credit Report Results

    Clutch was unable to obtain a credit report for this company. However, Clutch performed additional verification on this company and confirmed that there are no negative legal filings or large outstanding debts. This company has also received 3 or more verified reviews on our platform.

    Learn More About The Clutch Verification Process

    Locations (3)

    Tarasa Karpy St, 76 KropyvnytskyiUkraine 25000

    301 - 400

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