Top 60 Cross Platform App Developers in Bucharest
The Best of December 2025Looking for a top cross platform mobile app development company in Bucharest?
Cross-platform mobile applications have benefits that outweigh those of native applications if your users interact with your business on both Android and Apple products. Cross platform app development entails building a mobile app that’s compatible with multiple operating systems. Cross-platform, or hybrid apps, use a single codebase, which means you don’t need separate apps with separate technologies to appeal to customers using Android or iOS. Because of this single codebase, cross platform apps are less costly to create and maintain.
Most hybrid apps will use either Ionic or React as a development framework. React is a JavaScript framework that allow apps to support Android and iOS natively, while Ionic uses JavaScript, HTML5, CSS, and Sass for hybrid apps, desktop apps, and progressive web apps. Choosing an app developer with the right skillset to fit the technology framework your app needs is a good place to start when interviewing app development companies.
To assist you in your search for a partner, we’ve compiled this list of the top cross platform app developers in Bucharest. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best Bucharest Cross Platform Mobile App Development Companies
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1$25,000+10 - 49 employeesBucurești, RomaniaRead More
Atta Systems, a mobile application development firm, is located in București, Romania and Singapore. The small team offers Mobile App Development, Custom Software Development, UX/UI Design, BI & big data consulting & SI, and more and was established in 2015.
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UNICEFIndustries
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2$10,000+1,000 - 9,999 employeesBucurești, RomaniaRead More
Tremend Software Consulting is a software engineering company in Bucharest, Romania; Aliso Viejo, Calif.; and Brasov, Romania. Founded in 2005, they have about 337 employees that serve mostly midmarket and small-business clients in the financial, IT, and telecommunications sectors. Services include IT managed services, custom software development, and e-commerce development.
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OrangeIndustries
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3$25,000+50 - 249 employeesBucurești, RomaniaHyperSense Software Inc is a mobile application development firm. Their midsize team is headquartered in Schaumburg, Illinois and București, Romania. The agency specializes in Mobile App Development, AI Agents, UX/UI Design, Custom Software Development, and more. The agency was founded in 2003.Read More
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KORE Group Holdings, Inc.Industries
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4$25,000+250 - 999 employeesVilnius, LithuaniaCivitta is an AI development company. Founded in 2013, the midsize company is located in Vilnius, Lithuania; Rīga, Latvia; Chișinău, Moldova and Kyiv, Ukraine. Their team offers Artificial Intelligence, Custom Software Development, cloud consulting & SI, Enterprise App Modernization, and more.Read More
Clients
Global Airlines AI Front Desk BL.INK Franchise RampIndustries
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5$10,000+50 - 249 employeesBucurești, RomaniaRead More
IT strategy consulting company QUALITANCE was established in 2007. They are headquartered in București, Romania and have a midsize team. Their services include IT strategy consulting, ux/ui design, IT staff augmentation, custom software development, and more.
Clients
BCR Erste BankIndustries
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6Undisclosed50 - 249 employeesBucurești, RomaniaRead More
Founded in 2004, Roweb Development is a software development company headquartered in Bucharest, Romania. They also have four other locations in Romania and a team of 110 employees who offer custom software development, web development, mobile app development, web design, and UX/UI design services.
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Porsche BankIndustries
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7Undisclosed250 - 999 employeesBucurești, RomaniaApp development firm Holycode was launched in 2014. Located in Beograd, Serbia; Novi Sad, Serbia; Niš, Serbia and Binningen, Switzerland, their midsize team provides Mobile App Development, Application Management & Support, ERP consulting and SI, Custom Software Development, and more.Read More
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8$10,000+10 - 49 employeesBucurești, RomaniaRead More
genuineq is a software development company based in Bucharest, Romania, and founded in 2018. With over 10 experts, they provide web, e-commerce, and mobile app development solutions to small and mid-market agencies in the fields of business services and more.
Clients
SuperbetIndustries
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9$10,000+10 - 49 employeesBucurești, RomaniaNeo Vision is a București, Romania-based website development firm. Founded in 2015, the small team provides Web Development, Web Design, UX/UI Design, Product Design, and more.Read More
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ConfidasIndustries
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10$25,000+2 - 9 employeesBucurești, RomaniaRead More
XCODES DEVELOPMENT is a small custom software development firm. They focus on custom software development, web development, and mobile app development and were established in 2018.
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11$10,000+10 - 49 employeesBucurești, RomaniaRead More
UPDIVISION is a software development company based in Bucharest, Romania. Founded in 2010, their team currently consists of 67 employees. They offer web development, mobile app development, and IT strategy consulting. They primarily serve small business clients in the business, automotive, and e-commerce industries.
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12$50,000+2 - 9 employeesBucurești, Romania360design, a software development firm, is headquartered in București, Romania. They focus on custom software development, web development, mobile app development, and e-commerce development and were launched in 2008.Read More
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13$50,000+50 - 249 employeesVoluntari, RomaniaFounded in 2017, InDevLab is a midsize IT managed services company. Their services include IT managed services, Custom Software Development, Mobile App Development, and Cybersecurity. The company is headquartered in Kyiv, Ukraine; Voluntari, Romania and Stockholm, Sweden.Read More
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14$10,000+10 - 49 employeesBucurești, RomaniaRead More
Krypton Labs is a blockchain company. The small București, Romania-based company was launched in 2020. Their team focuses on blockchain, custom software development, web development, and Artificial Intelligence.
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15$1,000+2 - 9 employeesBucurești, RomaniaSoftclaire is a web development company. Located in București, Romania, their small team offers Web Development, Mobile App Development, and Custom Software Development. The firm was established in 2019.Read More
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16$50,000+50 - 249 employeesBucurești, RomaniaRead More
InCrys is a full-service IT and development agency based in Bucharest, Romania. They were founded in 2000, and have 111 employees that provide staff augmentation, custom software development, IT managed services, strategic consulting, and business intelligence software integration.
Clients
AuchanIndustries
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17$10,000+10 - 49 employeesBucurești, RomaniaGEKKO FOX is a small software development firm. Located in București, Romania, the firm was launched in 2012. Their services include Custom Software Development, Mobile App Development, Web Development, AI Consulting, and more.Read More
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18$1,000+2 - 9 employeesPopești-Leordeni, RomaniaRead More
Softpeak is a UX company headquartered in Popești-Leordeni, Romania. The small company was founded in 2022. Their team specializes in ux/ui design, product design, web development, mobile app development, and more.
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19$10,000+10 - 49 employeesBucurești, RomaniaRead More
Control F5 is a small custom software development company based in London, United Kingdom and București, Romania. Founded in 2015, the team provides custom software development, web development, mobile app development, e-commerce development, and more.
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InvestimentalIndustries
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20$1,000+10 - 49 employeesBucurești, RomaniaRead More
Systemio Technologies is a București, Romania-based custom software development firm. The small firm was established in 2021. Their services include custom software development, web development, mobile app development, IT strategy consulting, and more.
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21$25,000+10 - 49 employeesBucurești, RomaniaSoftware development firm UP2DATE Software was launched in 2009. Their small team is headquartered in București, Romania. Their services include Custom Software Development, Mobile App Development, Web Development, and E-Commerce Development.Read More
Clients
Jerry's Pizza PPC Romania B&H Photo VideoIndustries
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22$25,000+10 - 49 employeesBucurești, RomaniaCustom software development firm WebitFactory was launched in 2017. The small team offers Custom Software Development and Blockchain.Read More
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23$25,000+10,000+ employeesNantes, FrancePersistent Systems is a data analytics company. Established in 1990, the large agency is headquartered in Pune, India; Santa Clara, California; Paris, France and Lyne, England. Their services include BI & big data consulting & SI, cloud consulting & SI, Cybersecurity, Custom Software Development, and more.Read More
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24$10,000+2 - 9 employeesBucurești, RomaniaRead More
Appes is a development company based in Bucharest, Romania. Their team of fewer than 10 offers web, mobile app, and custom software development services to small businesses. They were founded in 2019.
Clients
Babele -
25$1,000+10 - 49 employeesBucurești, RomaniaRead More
In Călărași, Romania and București, Romania, F.P.D. Consulting & Solutions is a small custom software development company. They focus on custom software development, ux/ui design, digital strategy, search engine optimization, and more and were established in 2019.
Clients
Renault GroupeIndustries
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26$5,000+10 - 49 employeesBucurești, RomaniaRead More
Tribus Technologies is a software development firm based in București, Romania. They focus on custom software development, web development, mobile app development, and application testing and were launched in 2020.
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27$5,000+10 - 49 employeesBucurești, RomaniaDreamlabs is a. The small team is based in București, Romania. Their services include.Read More
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28$10,000+2 - 9 employeesBucurești, RomaniaZynala is a small software development firm. Headquartered in București, Romania, the firm was founded in 2019. Their team focuses on Custom Software Development, Mobile App Development, Web Development, Application Management & Support, and more.Read More
Clients
Les Laboratoires ServierIndustries
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29$10,000+10 - 49 employeesBucurești, RomaniaRead More
Jiratech is a software company based in Bucharest, Romania, and founded in 2017. With over 10 employees, they provide custom software, web, and mobile app development solutions for clients that work in the industries of IT, telecommunications, and other services.
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EnvisageAIIndustries
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30$25,000+10 - 49 employeesBucurești, RomaniaCustom software development company and app development company Blastproof Games is in București, Romania. Their services include Custom Software Development and Mobile App Development.Read More
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Fobia Tilting Point Fox Cub SpeedboundIndustries
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