Top Tech Startups in Arlington, VA in 2026

T-Rex has been recognized as a “fastest growing company” on the Inc. 5000 list. We’re blazing new paths in federal government IT modernization and transformation with our deep technical expertise in Systems Integration and Development, Cloud Adoption and Infrastructure Optimization, Cybersecurity, Data Engineering and Analytics, and Mission Critical Services.

Ripple Effect provides professional consulting and exceptional talent for federal, private, and non-profit clients to deliver some of the most crucial policies and programs that shape our nation. We are researchers and communicators, scientists, analysts and more, driven by curiosity and a commitment to positively impact health, safety and prosperity.

Amazon is guided by four principles: customer obsession rather than competitor focus, passion for invention, commitment to operational excellence, and long-term thinking. We are driven by the excitement of building technologies, inventing products, and providing services that change lives. We embrace new ways of doing things, make decisions quickly, and are not afraid to fail. We have the scope and capabilities of a large company, and the spirit and heart of a small one. Together, Amazonians research and develop new technologies from Amazon Web Services to Alexa on behalf of our customers: shoppers, sellers, content creators, and developers around the world. Our mission is to be Earth's most customer-centric company. Our actions, goals, projects, programs, and inventions begin and end with the customer top of mind. You'll also hear us say that at Amazon, it's always "Day 1."​ What do we mean? That our approach remains the same as it was on Amazon's very first day - to make smart, fast decisions, stay nimble, invent, and focus on delighting our customers.

We are a forward-thinking company that the government turns to in order to #getshitdone. We do more than talk about it, we break down barriers to innovation and build impactful tech.

Archesys provides a wide range of technical services and has been doing so for over 20 years, making a significant impact in the areas of organization, culture, and technology in both the private and public sectors. From digital modernization to process management, our team is the go-to resource for various government agencies looking to improve or overhaul their operations.

At Improbable, we believe that simulations as large and complex as the real world are the next fundamental breakthrough technology. Like in the real world, objects in these simulations will change in response to their environment, and their interactions will combine to form massive, complex systems. We are building the platform to make these simulations possible. New worlds for gaming and entertainment can now be created using our product, SpatialOS. Our technology creates permanent, persistent and engaging experiences: worlds where your actions really matter. The same technology that makes imaginary worlds feel real can also illuminate complex systems at work in reality. We use insight acquired through simulation to solve real world problems. You can find out more about our technology on our website - improbable.io

Our brand promise is: "With Thea, you won't just memorize material, you'll master it. Whether you have twenty minutes or twenty days to prepare for a test, Thea can help you get the-A." We're looking for world class people to help us deliver on our promise! If our current job postings don't fit your background, feel free to reach out and let us know how you can support our mission.

BMNT is unique because of the focus on Mission Acceleration - increasing the speed at which mission-driven organizations solve complex problems at scale. BMNT is not only an established thought leader in innovation but is actively changing how organizations think about and solve problems, as demonstrated by the creation of Hacking for Defense (H4D) ®. Our customers span across defense agencies, the military, local government, and even abroad in the United Kingdom and Australia.

Looking for PURPOSE? At GovStar, we found it. We love the work we do, the people we do it with, and the impact we have. We’re looking for talented technologists and creatives with the character, courage, and commitment to achieve greatness and grow together. We’re a tight group of individuals coming together to produce Legendary Teams. We are using technology and creativity to unlock the future of government and shape a brighter future for the country we love. Discover us @ govstar.us

Trustible AI is an early-stage DC based Software-as-a-Service startup that is on a mission to enable organizations to adopt Trustworthy and Responsible AI (RAI) practices. Our platform helps companies set internal RAI policies, establish a single source of truth for AI use cases, conduct internal AI audits, create public transparency pages and comply with an increasing number of AI regulations. We seek to empower customers to develop Responsible AI, define internal policies and perform external algorithm audits. We believe AI has the power to help the world, but only if it's developed and deployed with ethical considerations in mind. We think good AI governance helps build better AI and should be a critical component of any enterprise AI strategy.