Top 70 OPEN API Developers in Eastern Europe
The Best of April 2026
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List of the Best Eastern Europe OPEN API Development Companies
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1$5,000+50 - 249 employeesBoryspil', UkraineLaunched in 2017, 26 Lines Of Code is a custom software development company. The agency specializes in Custom Software Development, API Development, Web Development, Mobile App Development, and more and has a midsize team.Read More
Clients
RainaMusic RxPhoto Intuceo PBMSourceIndustries
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2$10,000+10 - 49 employeesZymna Voda, UkraineRead More
Bits Orchestra is a software development company. They specialize in Custom Software Development, Web Development, Web Design, IT staff augmentation, and more and were founded in 2018. Their small team is headquartered in Zymna Voda, Ukraine; Bakı, Azerbaijan and Orlando, Florida.
Clients
Harold Grinspoon FoundationIndustries
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3$5,000+50 - 249 employeesČeské Budějovice, Czech RepublicArgo22 is a midsize mobile app development firm. Headquartered in České Budějovice, Czech Republic, the agency was founded in 2010. Their services include Mobile App Development, E-Commerce Development, Custom Software Development, Web Development, and more.Read More
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4$10,000+50 - 249 employeesTallinn, EstoniaChudovo is a midsize software development firm. The Tallinn, Estonia-based agency was established in 2006. Their team provides Custom Software Development, Web Development, Mobile App Development, E-Commerce Development, and more.Read More
Clients
Hoffman-La Roche, Royal Bank of Scotland, Saphera, Corizon Health, Evonik, TP-Link, Nexans, FDP-Bundestagsfraktion, berlinappcompany GmbH, Barcodes Inc., Pixabit-Solutions, Infocom, UkrPromBank, RBC SoftIndustries
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5$25,000+50 - 249 employeesLjubljana, SloveniaAgiledrop - EU-based Official Laravel Partner, a midsize custom software development firm, is headquartered in Ljubljana, Slovenia; Maribor, Slovenia and Celje, Slovenia. Founded in 2013, the team offers Custom Software Development, IT staff augmentation, Web Development, Web Design, and more.Read More
Clients
Amazee LabsIndustries
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6$5,000+10 - 49 employeesKharkiv, UkraineIntent Solutions, a website development firm, was founded in 2013. Their small team is in Kharkiv, Ukraine. Their services include Web Development, E-Commerce Development, Mobile App Development, API Development, and more.Read More
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7$10,000+50 - 249 employeesNovi Sad, SerbiaProductDock AG, a custom software development company, was founded in 2020. They are based in Berlin, Germany; Lisboa, Portugal; Novi Sad, Serbia and Banja Luka, Bosnia and Herzegovina and have a midsize team. Their services include Custom Software Development, Web Development, Mobile App Development, API Development, and more.Read More
Clients
AdevintaIndustries
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8$10,000+10 - 49 employeesWarszawa, PolandRead More
Custom software development company Softellar was founded in 2021. Headquartered in Warszawa, Poland, their small team provides custom software development, web development, ux/ui design, IT strategy consulting, and more.
Clients
Multi Radiance Medical Loma Lux Laboratories Grand Financial Inc Commercial Capital Group LLCIndustries
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9$50,000+10 - 49 employeesWarszawa, PolandCleverLabs, a website development firm, was launched in 2015. Their small team is located in Warszawa, Poland; West Valley City, Utah; Astana, Kazakhstan and Tallinn, Estonia. The firm focuses on Web Development, API Development, IT staff augmentation, Custom Software Development, and more.Read More
Clients
Decisely Insurance Services LLC, USA Essential Hub LLC, USA Shipkey LLC, USA Optor AG, SwitzerlandIndustries
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10$5,000+10 - 49 employeesKharkiv, UkraineRead More
Right Link, a small web development firm, is in Kharkiv, Ukraine. Founded in 2014, the team focuses on web development and e-commerce development.
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11$1,000+10 - 49 employeesChișinău, MoldovaEazyCode, a small Low/No Code Development company, is located in Chișinău, Moldova. Founded in 2019, the team provides Low/No Code Development, Web Development, Mobile App Development, API Development, and more.Read More
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12$50,000+2 - 9 employeesMaribor, SloveniaPRIOT Digital Systems is a small custom software development company. They provide custom software development, web development, and IoT development and were launched in 2019.Read More
Clients
Sparkasse bankIndustries
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13$1,000+10 - 49 employeesKharkiv, UkraineLaunched in 2019, Exelor is a Low/No Code Development company. The firm focuses on Low/No Code Development, Custom Software Development, AI Consulting, AI Agents, and more and has a small team.Read More
Clients
Evan-Moor (United States) KISA (Australia) ClaimRide (United States) Summerboard (United States)Industries
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14$10,000+2 - 9 employeesBeograd, SerbiaGILAB DOO Beograd is a small website development company. Headquartered in Beograd, Serbia, the firm was founded in 2015. Their services include web development, mobile app development, Artificial Intelligence, api development, and more.Read More
Clients
OpenGeoHubIndustries
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15$10,000+2 - 9 employeesL'viv, UkraineEstablished in 2017, ITPenthouse is a software development firm. Their small team is based in L'viv, Ukraine. Their team offers Custom Software Development, Web Development, API Development, Mobile App Development, and more.Read More
Clients
LucidTunesIndustries
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16$1,000+50 - 249 employeesChișinău, MoldovaMetawebart, a website development firm, was launched in 2008. The midsize Chișinău, Moldova-based team focuses on Web Development, Back Office Outsourcing, Web Design, Mobile App Development, and more.Read More
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17$10,000+10 - 49 employeesBucurești, RomaniaFounded in 2022, DevsReady is a software development firm. They are located in București, Romania and have a small team. Their services include Custom Software Development, API Development, and Enterprise App Modernization.Read More
Clients
Technology Reply Oves EnterpriseIndustries
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18$10,000+10 - 49 employeesBanja Luka, Bosnia and HerzegovinaSmall custom software development company Invenit Solutions, is headquartered in Banja Luka, Bosnia and Herzegovina and Miami, Florida. Launched in 2019, the team focuses on Custom Software Development, Mobile App Development, API Development, Low/No Code Development, and more.Read More
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19$10,000+10 - 49 employeesSkopje, North MacedoniaRead More
Stellar Development is a custom software development company. Established in 2019, the team provides custom software development, api development, devops managed services, web design, and more. Their small firm is based in Skopje, North Macedonia.
Industries
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20$25,000+50 - 249 employeesWarszawa, PolandCleverDev Software, a IT strategy consulting company, is located in Austin, Texas and Warszawa, Poland. They focus on IT strategy consulting, cloud consulting & SI, custom software development, web development, and more and were established in 2020.Read More
Industries
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21$10,000+10 - 49 employeesReda, PolandWebMagic Agency, a software development firm, is located in London, England; Reda, Poland; Segovia, Spain and Cluj-Napoca, Romania. The company offers Custom Software Development, E-Commerce Development, IT managed services, API Development, and more and has a small team.The company was launched in 2014.Read More
Industries
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22$5,000+Freelancer employeesPraha, Czech RepublicLaunched in 2019, Vitalii Zdanovskyi | Digital Cossack is a website development firm. Their small team is headquartered in Praha, Czech Republic and focuses on Web Development, API Development, AI Agents, and UX/UI Design.Read More
Industries
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23$1,000+10 - 49 employeesKyiv, UkraineDevCode Development Studio is a web development firm launched in 2012. The small Kyiv, Ukraine-based team offers Web Development, E-Commerce Development, Web Design, UX/UI Design, and more.Read More
Clients
Ikova Design StoreIndustries
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24$5,000+2 - 9 employeesDnipro, UkraineRead More
Established in 2019, DevMaxUp is a web development firm. They are based in Dnipro, Ukraine and Odesa, Ukraine and have a small team. Their services include web development, custom software development, mobile app development, and web design.
Clients
SocialMeeting -- a cutting-edge web-based SaaS platform that enables users to create interactive, prerecorded meetings with ease.Industries
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25$10,000+10 - 49 employeesMykolaiv, UkraineDevHired is a small custom software development company launched in 2011. Their team provides Custom Software Development, API Development, cloud consulting & SI, and Artificial Intelligence. The firm is located in Mykolaiv, Ukraine and Mittenwalde, Germany.Read More
Clients
Pixxell CMSIndustries
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26$10,000+10 - 49 employeesKraków, PolandByVoice, a software development firm, was established in 2020. The small Kraków, Poland-based team focuses on Custom Software Development, IT staff augmentation, Web Development, Artificial Intelligence, and more.Read More
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27$1,000+50 - 249 employeesPoznań, PolandFounded in 2021, DIGITAL-IMAGES sp. Z o.o. Is a web development firm. They are in Poznań, Poland and have a midsize team. The firm offers web development, e-commerce development, custom software development, mobile app development, and more.Read More
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28$10,000+50 - 249 employeesKyiv, UkraineConfidence Technology is a website development firm. Their midsize team is based in Kyiv, Ukraine; Свети Влас, Bulgaria; Dubai, United Arab Emirates and Oslo, Norway and focuses on Web Development, Mobile App Development, E-Commerce Development, Application Testing, and more. The company was launched in 2022.Read More
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29$5,000+10 - 49 employeesWarszawa, PolandLocated in Warszawa, Poland, K4 Tech Solutions is a small Blockchain company. Established in 2024, the team focuses on Blockchain, Custom Software Development, Web Development, Mobile App Development, and more.Read More
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30$1,000+2 - 9 employeesKyiv, UkraineUpScale Ninjas is a small Low/No Code Development company. The Kyiv, Ukraine-based firm was launched in 2020. Their team focuses on Low/No Code Development, CRM consulting and SI, API Development, AI Consulting, and more.Read More
Industries
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