Top 10 Mobile App Development Companies in Sofia 2026

21Twelve Interactive is a end to end product development company focused on emerging systems. From fresh organizations to industry options, they produce high-end applications to their own customers. They make an effort to allow it to triumph through the approach along with their specialized expertise in creating an innovative maturation of the user experience on the internet and also cellular phones. As one of those evolving and leading portable application development businesses in Sofia, people at 21Twelve Interactive have acquired significant knowledge in the maturation of indigenous mobile applications services.

Coherent Solutions is a software product development and consulting company that solves customer business problems by bringing together global expertise, innovation, and creativity to produce world-class technology solutions.

Based in Sofia, Bulgaria, our team consists of a pool of talented software engineers, testers and consultants. We provide custom software and product development services using automated delivery and testing processes, and an agile approach.

If you’re looking for a cheap offshore production shop, that’s not us. If a long-term partnership with a highly-efficient, easy-to-work-with global leader is more your style, you’ve landed in the right place. By enrolling the best and brightest minds in Bulgaria, we deliver innovative custom software solutions with a personalized touch.

We recognized the potential of Bulgaria back in 2001 and helped it grow into the tech hub it is today. Along the way, we built long-term relationships with global clients, scaling with them as their technology needs grew. Employees in our five Bulgarian offices are 100% fluent in English and work noon–8pm local time (4am–noon CST). This makes communication a breeze and gives us four hours of daily overlap in working hours for meetings and exchanging ideas. We conduct daily standups that keep everyone on the same page even if they’re not in the same office, city, or even country.

Technology is constantly evolving, making it daunting to navigate. We pride ourselves on our ability to demystify digital trends and cut through the jargon. We’ll guide you through the best options to fulfill your business needs in the most efficient way possible.

Hakomo designs stunning interfaces and develops reliable applications through projects or dedicated teams We help small and medium sized companies and start-ups develop user-centric apps. 10 years of programming experience and the fast pace of the startups have taught us to always choose the right technology to deliver fast and bug-free web solutions and apps.

With a number of startups behind our back and a few dozen mentored startups, we can help you make the right choices when they are not obvious: what to build first, what not to build, and how to figure those things out.

Founded in 2015, today Upnetix is among the largest enterprises in South-Eastern Europe, specialized in the design and development of seamless software solutions, tailored to meet your individual needs. Drawing on the deep technical and business expertise of our engineering team, we provide our customers with exceptional value for their business. By delivering high-quality solutions with professional integrity, we build successful business relationships based on mutual trust and respect.

As one of the leading companies in the region, we provide the full-range of software development and IT consultancy services, covering all phases of the software development life cycle: from business analysis, design and prototyping to development, quality assurance, deployment and post-project maintenance and support. Our team of over 120 talented engineers excels in industry’s most popular programming languages and software tools, allowing us to deliver cutting-edge solutions, aligned with the latest technologies and best practices.

The reason Qualifast exists in the world is to create technology products. But let’s be honest: It’s way more than that. We guide visionaries in every step of their way. From validating ideas (Yes, we’ll tell you if it’s not good) to technological support, clearing requirements, finding the right partners or contractors and delivering the solution. We want to put on the market a real product and see how much the world will love it. This is the reason we look very serious at our relationships with clients.

Melon is a software development outsourcing company based in Sofia, Bulgaria. 

Our talent spans from web to mobile, backed by a QA, Big Data Machine Learning, cloud, DevOps and system support, and UX/UI and visual design departments. We are especially good at building teams that closely match our clients’ needed technological skills and experience.

Melon’s team currently consists of more than 150 young and highly qualified professionals including web (.NET, PHP, Python, Ruby, SharePoint, HTML/JS) and mobile developers (iOS, Android, Windows Phone, Cross-platform, PhoneGap, Xamarine, Ionic, Unity), designers, interactive media and system support specialists, quality assurance and machine learning engineers.

We are a Bulgarian company that specializes in Android and iOS mobile phone application development. With our assistance everyone can realize a personal or creative app idea. We guarantee you high quality work with the latest innovations and practices, as well as fast performance in the shortest time, plus – 100% reasonable prices.

Donatix is a web and mobile application development company that specializes in working with Start-ups and Corporations in the healthcare, financial and travel sector. We do custom app building for the web and mobile, technology consultancy, UI and UX design.