Top Tech Startups in Eastern Europe in 2026

Blockstream is the leading Bitcoin company, providing cutting-edge infrastructure solutions for enterprises, institutions, and individual Bitcoin users. We develop industry-leading Bitcoin self-custody solutions, Bitcoin-based financial products, second-layer scaling technologies, and enterprise-grade blockchain infrastructure. OUR PRODUCTS: - The Liquid Network: sidechain-based settlement network for traders and exchanges - Blockstream App: A multi-platform, feature-rich Bitcoin and Liquid Wallet - Blockstream Jade: A fully-open source hardware wallet for Bitcoin and Liquid - Blockstream Enterprise: Enterprise-grade custody and treasury management tool - Blockstream Satellite: the Bitcoin blockchain beamed from space - Many major contributions to Bitcoin open source software and research

Accelerating deals from propose to close Empowering sales teams to simplify the process to generate, negotiate, and eSign proposals, quotes, and contracts

At pubGENIUS we build software that helps great ideas become real products. We’re a US-based development company founded by a former Microsoft engineer, and we’ve been remote since day one. Our team is fully distributed across 10 countries from the U.S. to Europe, Asia, and Africa and we believe that where you live should never limit where you can build. What sets us apart? Our standards: -We value deep knowledge, strong engineering skills, and clear communication. Our hiring process is intentionally tough we select just 1 out of every 1,200 applicants to make sure we build a team that can consistently deliver great work, fast. What unites us is our passion for technology, our love for clean code, and our commitment to helping startups bring their visions to life. Since 2018, we’ve worked on 80+ projects, supported founders from day zero, and helped raise over $15 million in funding for early-stage startups. Whether you’re building your MVP or scaling your product, we’re here to make it happen with speed, quality, and the care of a real partner. What We Do: - We have a solid and proven track record building: - Web applications:SaaS platforms, e-commerce, healthcare, fintech, e-learning, CRMs, and more. - Mobile apps: high-performing apps on iOS and Android using React Native (plus native integrations). - Fractional CTO: Strategic support to help you choose the right tech stack, set up scalable architecture, and move faster without hiring full-time. Who We Work With: Whether you're in healthcare, e-commerce, education, AI, fintech, or something entirely new, our sharp-minded engineers can tackle any complexity. We don’t limit ourselves by industry we’re here to solve real problems with clean, scalable code. How We Think: We’re trying staying ahead. Every decision we make from architecture to stack selection is designed to ensure that the products we build will stand the test of time and evolve with your business.

AlphaLab Capital Group is a technology-driven trading group that transacts over $2B daily in cryptoassets on 40+ exchanges, both centralized and decentralized. Since 2017, we have consistently generated exceptional returns (aka alpha). We were one of the first movers in quantitative trading on the blockchain, and today we operate thousands of algorithms 24/7 on a globally distributed network of trading servers. We see blockchain as the foundational technology of our generation. Just as ship-building innovations in the 1450s launched the Age of Exploration or TCP/IP in the 1970s launched the internet as we know it, blockchain now opens up new worlds of possibility. Much of the infrastructure, applications, and software that we will all take for granted in a few decades are only glimmers in someone’s imagination today. We founded AlphaLab because there is huge potential in building that future. It’s also going to be a lot of fun.

ComplyAdvantage is helping firms rethink how they combat financial crime and comply with regulations (specifically around Sanctions, AML and CTF). The team is on a personal mission to combat the rising threat of terrorism and fight the negative impact on society of money laundering. ComplyAdvantage's proprietary, dynamic global database of individuals, organisations and all their connections, provides fresh insight into financial crime risks (e.g. Sanctions, Watchlists, Politically Exposed Persons, Adverse Media). ComplyAdvantage's screening platform helps to safely automate the risk assessment of customers and transactions, and their real-time analytics enable firms to monitor customer activity and spot suspicious behaviours. ComplyAdvantage uses machine learning and big data coupled with a tailored risk-based approach to help a wide range of insurance companies and financial institutions improve automation, reduce manual work (‘false positives’) and make decisions faster.

We are a software house with a 18-year history, a rich portfolio, projects all over the world and an appetite for more. We have built our brand on professionalism and flexibility in delivering software solutions. We are not afraid of unconventional ideas and value innovation and imaginative change. What is our focus? Software solutions that meet the challenges of businesses. Production systems, transport, e-commerce: anything that improves productivity – on any platform. Our core competences are in Industry 4.0, integrations, migrating legacy systems and custom software development We strongly believe in the power of talent. We approach challenges as a team, without unhealthy competition. Knowledge is there to be shared and gained.

Founded in 2016, we're bootstrapped, profitable, and fully-remote. We're a team of a dozen great people, spread across North America, Europe, and Asia. SmarterQueue is a feature-rich, powerful social media tool, with an ambitious roadmap of exciting improvements guided by our customers feedback.. Trusted by 1000s of brands and entrepreneurs, SmarterQueue saves users on average 8+ hours a week and boosts engagement by 10x. Effortlessly manage all your social accounts, with content curation, scheduling, engagement, inbox and analytics in one intuitive platform.

ServiceTitan is a mobile, cloud-based software platform that helps home services companies streamline operations, improve customer service, and increase sales. ServiceTitan's end-to-end solution for the multi-billion dollar residential home services industry includes CRM, intelligent dispatch, custom reporting, marketing automation, a mobile solution for field techs, and accounting integrations with Sage Intacct and QuickBooks. ServiceTitan brings a fully operational modern SaaS infrastructure to an industry traditionally underserved by software. ServiceTitan is the preferred software for the world's most successful plumbing, HVAC, and electrical companies. ServiceTitan currently has more than 2,500 customers and more than 600 employees across Glendale and Atlanta. For more information about ServiceTitan, visit servicetitan.com Interested in becoming a Titan? Visit: servicetitan.com/careers

Founded in 2019, Uncapped is Europe’s first revenue-based finance provider, which allows founders to raise growth capital without giving up control of their business. The company was born out of frustration with the limited financing options available for European entrepreneurs. Uncapped provides business advances of between £10k and £1m with 0% interest and no hidden charges, allowing founders to access fair and flexible finance. It makes money by charging a low flat fee which is paid back from future sales revenue.

SaaS, designed for low-tech people! Yokeru's customers say, "Honestly, I cannot fault the product or its potential in the telecare field!" "I love the service" "It gives us the capability to call thousands of people simultaneously. We're getting to people much quicker."