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Techstack company is an international strategic technology partner with strong Ukrainian roots, delivering comprehensive digital transformation services worldwide. We unite nearly 200 experts across borders, combining staffing, engineering, and optimization services into one powerful offering. With over a decade of excellence, we’ve become a trusted partner for global businesses — 30% of which are $1B+ enterprises — delivering full-stack teams and empowering software engineering leaders. Rooted in our Ukrainian engineering heritage and strengthened by our international presence, Techstack unites the best of Eastern European technical excellence with global business practices, making us a partner capable of both precision in execution and vision in strategy. 💫 The Techstack Difference
Strategic Partnership:- Engineering with product ownership, aligned with your goals- Strong technical leadership and proactive delivery planning- Long-term scalability built into every architectureProfessional Excellence:- Senior-level expertise across all technologies- Cross-functional teams with diverse skill sets- Proficiency with modern tech stacksTransparent Communication: - Regular updates and detailed reporting- Direct access to your dedicated team- Clear project roadmaps & milestone trackingQuality-First Approach:- Rigorous code reviews and comprehensive testing protocols- Strict coding standards adherence- Industry best practices in every deliveryBusiness Value Focus:- Transparent pricing with no hidden fees- Resource optimization strategies- Value-driven development aligned with your goals- Scalable architecture design- User-centric development methodologyModern Technical Capabilities: - Cloud-native solutions- AI & ML integration|- Automated workflows- Agile methodology- Advanced DevOps practicesWe align with your product and business strategy, bring disciplined engineering practices, and build solutions designed for scalability, resilience, and long-term growth. Let’s build something that lasts! 

Together, Beyond Expectations. With nearly two decades of experience on the global IT market, CHI Software is your go-to provider of AI solutions, bringing a real difference to businesses. We create intelligent virtual assistants that boost customer engagement, optimize workflows, and improve overall business performance even with minimum budgets. CHI Software offers full-cycle chatbot development, from conceptualization and design to implementation and ongoing support. In our work, we apply natural language processing (NLP), machine learning, and deep learning, ensuring our solutions are scalable and can be integrated with various platforms like websites, mobile apps, and social media channels. Our team takes a personalized approach to each project, delivering solutions tailored to specific business goals. Our extensive experience with AI, alongside our commitment to innovation, enables us to create chatbots that not only meet but exceed expectations. Partner with CHI Software to experience the full potential of AI chatbot technology (it’s huge!) and stay ahead in the rapidly evolving digital landscape.

BIT Impulse is a Ukrainian information technology company based in Lviv. BIT Impulse specializes in analytical projects. It helps businesses analyze all business processes, create and implement effective analytical steps. Our mission is to simplify business life. We are turning work with complex and voluminous data into an accessible and easy process. BIT Impulse’s IT solutions have been on the market for over 15 years. BIT Impulse is the developer of the original BAT software (Business Analysis Tool) software, which has already been used by more than 100 Ukrainian and international companies.

Linkos Group is a leading Ukrainian IT company, specializing in developing innovative digital solutions tailored for business automation needs.  For over 25 years, Linkos Group has created IT products in e-reporting and e-document management, widely used by accounting professionals and businesses across the country.  Linkos Group product line: ⬢ Medoc is a program for e-document management and e-reporting. Winner of the international competition-festival of the best goods and services: "Choice of the Year 2019" and "Choice of the Year 2020" in the nomination "Commercial Program of the Year for Reporting and Electronic Document Management". Ukraine’s leading e-reporting and e-document management software, trusted for 25+ years. All reports, invoices, acts, and contracts in one platform, with iXBRL and SAF-T UA solutions.  ⬢ SOTA is a web service for e-reporting, tax invoices, contracts, and receipts with browser-based, secure workflows. Submit reports, sign documents, and register receipts. Includes a mobile solution for electronic consignment notes for all transportation participants.  ⬢ Cashalot is an all-in-one solution that integrates software-based cash registers, warehouse accounting, and comprehensive analytics for both cash registers and cashiers. Recognized as the best technological solution (The SUP — Union of Ukrainian Entrepreneurs — 2023 Award).  ⬢ CloudKey is a secure cloud-based electronic signature, provided and safely stored by the Key Certification Centre “Ukraine”. Sign documents anywhere, without being tied to specific hardware. Integrates seamlessly with popular software and e-services for citizens. ⬢ Linkos ERP is a next-gen ERP for efficient governance and operations. A flexible, service-oriented platform featuring low-code/no-code, AI agents, and operational analytics for accounting, finance, logistics, and HR. Scalable, secure, and compliant. ⬢ ISpro is a global ERP software package designated to automate accounting and management at enterprises and budgetary institutions.  ⬢ FlyDoc is a service for direct exchange of primary documents with counterparties from the accounting system.  ⬢ PTAH is a platform that provides roaming of electronic documents between different platforms.

ELITEX. Beyond expectations. Since 2015, we have been successfully delivering projects, as well as building engineering teams for our customers from the USA, UK & EU. We have delivered for companies in FinTech, News & Media, Content Management, E-learning, Property Management, Telecommunications & E-Commerce. We hire only the best talent. Our experts have experience writing software for Fortune 500 & Fortune Global 500 companies. ELITEX mission is to build a lasting partnership with every customer, based on strong expertise, attention to details, efficient communication, and mutually beneficial collaboration. Our approach results in synergy between the customer and our team. This makes us successful.  

FIVE provides services in the following technological directions:Cloud servers and servicesDesktop applicationsWeb applications and websitesMobile applicationsEmbedded developmentWe have only happy customers! We have successfully completed every project FIVE engineers have been working on!We don't charge for management, all of our invoices include only technical hours. We propose architecture and project analysis for free!We know how to build efficient team and can find great talets to empower your business.

You’ve got the strategy. We turn it into working solutions. For 20+ years, Sigma Software has worked with Fortune 500 companies, global vendors and technology start-ups. Our mission is to help innovation leaders move critical initiatives forward by aligning teams, systems, and priorities. With 1,800 engineers in AI, data, cloud, embedded, and cybersecurity, we deliver solutions that scale and last, with ISO-certified quality, security, and compliance embedded from day one. Strategic Initiatives we support:AI Adoption – use AI where it brings tangible value, starting from first pilots and scaling to wider use. Digital Product Innovation – create new software or add digital layers to existing products and services, built with security and compliance in mind. Experience Design – shape journeys across apps and portals so users reach the right outcomes with less friction. Regulatory Compliance – navigating the regulatory landscape complexity and translating standards into working processes for audit-ready operations. Operational Efficiency – replace slow or manual work with modern, automated solutions that cut cost and effort. Managed Services – ensure stability, security, and uptime without draining internal teams. Our work goes beyond solution delivery. Sigma Software Labs works with startups to shape and test new ideas. Sigma Software University not only grows future engineers but also helps our clients build internal capabilities through tailored literacy programs and training. Our R&D teams experiment with emerging technologies early, so when they become relevant, our clients can adopt them faster and with less risk. Together, this cycle of delivery, learning, and exploration makes us better partners and strengthens the outcomes we deliver.

Uptech is a mobile and web development company where ideas and expertise meet to become great software solutions. We help aspiring startups, and well-established businesses bring their bold ideas to life and launch mobile and web apps. Over more than 8 years of work, we've worked with some of the innovative companies, including Aspiration, Dollar Shave Club, Drone Base, Yaza. We've seen our clients grow from small startups to scalable companies – and celebrated every victory with them (and our clients raised $2. 2M 🚀)Our mission is to build successful software solutions that make a change in people’s lives. And we dare to make a change with you!By working with us, you not only get a 5-star product. You get- smooth communication & full support,- transparency of all processes,- a proactive experienced team,- an outside perspective view of the product, and- openness.  What services we provide:Discovery Stage (Business analysis)UX/UI DesignMobile App DevelopmentWeb App DevelopmentCustom Software DevelopmentWebsite DevelopmentStaff AugmentationOur technology stack: Kotlin, Java, Swift, React, Node. js, AWS. To know the price and duration of development, contact us at hello@uptech. team. We will specify the features of your app and provide you a full time&cost estimate.

In 2022, as busy parents and engineers, we found ourselves facing the same fertility struggles that touch so many families. That's when we realized we needed a better way—a more convenient, clearer way to understand our bodies. So, we created Ovul. Our little egg-shaped ovulation monitor combines the best of technology with the convenience, reliability, and clarity every family deserves. This digital fertility tracker is designed to slip easily into your daily routine, offering precise insights with privacy and ease. Whether you're searching for how to check ovulation at home or looking for a modern alternative to a traditional fertile focus saliva ovulation microscope, Ovul brings innovation and comfort together. This is our story of innovation and support, woven into every Ovul ovulation monitor, making sure no one feels alone on their journey to parenthood.

Full-service Software Haven Volpis has expertise in diverse niches, from HealthTech and Social Media to Fleet Management, Navigation, Wellness, and EdTech. Now, we're ready to infuse innovation with your groundbreaking ideas. 🟢 WHY US: ▪ Care about relationships. “Clients for life” and “same boat” approach; ▪ Close collaboration - the more you'll be involved the better the result is; ▪ Deliver 101% result with Agile; ▪ Dedicated project managers and transparent delivery tracking to maintain ongoing feedback; ▪ The full-cycle development course, from Business Analysis and planning to QA and incremental improvements. ▪ Both Native & Cross-platform Mobile App development. 🟢 COMPANY PROFILE: ▪ Providing development services starting from 2016; ▪ 35+ team members and keep on growing; ▪ Leading Software Development Agency on Clutch in 2020. ▪ Top User Experience Company in GPS, Navigation & GIS on Clutch in 2024. 🟢 OUR SERVICES: ▪ Product Development; ▪ Mobile App Development (Native and Cross-platform); ▪ Android and iOS App Development; ▪ Full-Stack Web Development; ▪ Discovery Phase & Business Analysis; ▪ UX & UI Design (Web and Mobile); ▪ UX Research and audit; ▪ Product Redesign; ▪ Quality Assurance & Project Management; ▪ Maintenance and Support; ▪ Staff Augmentation. 🟢 TECHNOLOGIES: ▪ Mobile App Development: Android App Development (Java, Kotlin), iOS Development (Objective-C, Swift), Cross-platform App Development (Flutter); ▪ Web Development: JavaScript and related Front-End & Back-End frameworks (React. js, Vue. js, Node. js, Express. js, Nest. js), TypeScript; ▪ UX & UI Design: Figma, Sketch, InVision, Adobe Creative Suite 🟢 BUSINESS MODELS: ✔Time and Material (you pay exactly for the time spent on delivery) ✔Fixed-Price (we estimate the project scope and give definitive cost numbers) ✔Dedicated Team (our engineers get embedded into your team for the project timeframe and adopt your corporate culture)

Deviart is a boutique agency with the focus on Website Development services. We apply the most successful and most effective practices in Web Development, focusing on the management coherence, communication transparency and technical solutions feasibility. And we are sure that the success of our solutions is not a simple exaggeration, but a distinct and consistent consequence of our client-oriented policy. We are serious and perceptive experts in WordPress development, our qualitative output is pixel-perfect, good-performative flexible websites built from scratch, the right solution to satisfy the need of our clients. Our expertise- Full-Stack Web Development services- Design (PSD/Sketch/XD/Figma…) to WordPress- WordPress Theme and Plugin Development- Fixes/optimization/improvements

Where science and technology work for you. At Abto Software, we harness the power of cutting-edge technologies to deliver custom solutions tailored to your business needs. As a Microsoft Gold Certified Partner, we specialize in areas like . NET development, AI and machine learning, cloud solutions, mobile and web development, and legacy system modernization. Since 2007, our team has successfully delivered over 50 enterprise-level projects across industries such as healthcare, retail, FinTech, energy, and government. Our expertise spans from building scalable cloud-native applications to deploying AI-powered tools that streamline operations and enhance decision-making. Key achievements include crafting healthcare platforms that improve patient outcomes, developing AI-driven recommendation engines for retail, and migrating legacy ERP systems to modern architectures. What sets us apart is our client-first approach—we listen, collaborate, and deliver solutions that drive measurable results. Whether you're a startup or an established enterprise, we ensure transparency, flexibility, and technical excellence in every project. Let us transform your vision into reality. Partner with Abto Software to elevate your business through innovative technology.