Top Washington, DC Startups (1,097)

Nisos is a human risk intelligence and managed investigations company that protects organizations and their people from human-driven and digital threats by operating as an extension of their security, intelligence, and legal teams. It leverages a team of expert analysts, specialized in open-source intelligence and adversary tradecraft, to provide actionable intelligence that addresses complex risks like executive threats, insider fraud,...

ASI is a dual-use software company that deploys predictive AI to the world's most complex operating environments. Backed by leading investors–including Andreessen Horowitz, Renegade Partners, and Spark Capital–we actively manage over 40% of all US air traffic across both public and private sector air operations. Partnering with major airlines like United and Alaska, we optimize thousands of flights daily, delivering...

https://www.youtube.com/@northslope-technologies At Northslope, we believe that purpose-built AI products in the hands of business operators create far more value than slide decks or off-the-shelf software. That’s why we partner with ambitious organizations to transform entire industries through Palantir’s Foundry and AIP platforms—delivering powerful, measurable outcomes in weeks, not years. We operate more like a product startup than a traditional services firm. Our...

MORSE is a specially selected team of scientists, engineers, and software developers who use asymmetric and unconventional approaches to deploy practical solutions that solve difficult multi-disciplinary problems faced by the US National Security Ecosystem.

Bellagent is an enterprise-level AI agent platform built to automate everyday business operations with zero-touch integrations that connect instantly to more than 1,300 applications. Launched in 2025 by Proactifi Inc., and headquartered in Chicago, the platform is built for practicality with industry-leading compliance and security standards, enabling organizations to deploy AI agents without friction from day one. Bellagent’s mission to...

Data privacy management made simple. Solve the most pressing challenges of GDPR, CCPA & prepare to meet evolving privacy laws around the world. See how.

Base Operations helps companies keep their people and operations secure with Micro-Intelligence, or street-level threat assessments. Using AI to aggregate public and proprietary information, Base Operations has created the world’s largest dataset of global threat patterns. A visualization platform helps companies conduct geolocation-based analysis for travel safety, threat intelligence, crisis management, and site selection and expansion.

We are a small team of developers and visual communicators. We love Drupal. We are vet owned & DC DSLBD Certified.

Teal provides exceptional managed IT solutions for small- to medium-sized organizations that value real partnerships and elevated security - strategically accelerating their partner's growth and protecting them from evolving digital threats. With over two decades of experience, Teal enriches lives by delivering ultra-responsive services, prioritizing integrated cybersecurity, and investing in their staff. Small business leaders deserve to optimize their technology investments...

Cybersecurity and software engineering SMEs that help Government and Commercial customers build secure scalable solutions. Treat every customer like our partner. Build an environment of mutual success with all our partners. Cyber Fusion Center/Managed Security Services, DevSecOps, Pen Test, CISO-AAS, AngularJS, ReactJS, NodeJS, Java, Spring, MongoDB, Postgres.... Too many to list and we are known to throw in a few fakes...

Young Invincibles was founded in the summer of 2009, motivated by the recognition that young people’s voices were not being heard in the debate over health care reform. Co-Founders Ari Matusiak and Aaron Smith and a few friends wanted to change that, so they set up a one page website, asking young people to share their stories, believing in their...

The Council is the premier global alliance advancing crypto innovation. Crypto has immense potential to spur international economic growth and create jobs, improve financial inclusion and access, and enhance privacy and security. By sharing insights, expertise, and the facts about the global crypto ecosystem, the Council supports governments and institutions worldwide in efforts to shape and encourage the responsible regulation of...

SGI Global provides a range of services that combat transnational criminal, drug trafficking, terrorist and insurgent organizations in asymmetric environments around the world. Our law enforcement-centric investigative and intelligence support and training services, financial crimes expertise, security assessments and logistics capabilities make SGI Global a trusted high-value partner to US Government agencies, partner nations and the commercial sector worldwide.

DNSFilter is redefining how organizations secure their largest threat vector: the Internet itself. DNSFilter is making the Internet safer and workplaces more productive by blocking threats at the DNS layer. DNSFilter resolves upwards of 130 billion daily queries. With 79% of attacks using Domain Name System (DNS), DNSFilter provides the world’s fastest protective DNS powered by AI, blocking threats an...

Blue Altair is a niche, industry-recognized business and technology consulting firm that assists our clients with digital transformations. We offer Assessment and Strategy, Technology Implementation, and Managed Services in: • API Management and Integration [API-First based strategy; iPaaS strategy; complex hybrid cloud implementations and deployments; system and data integration] • Data Management [Data Governance; MDM; Data Engineering; Data Platforms] • Digital Application Development...

One Company, One Solution. Aristotle is recognized as the pioneer in political technology. Every occupant of the White House — Democrat and Republican — for more than 25 years, has been an Aristotle customer, as are most U.S. Senators, most members of the U.S. House of Representatives, and Democratic and Republican state party organizations. Year round, thousands of Americans involved in...

Connect Centric delivers Execution as a Service™ for leaders who need critical initiatives to move, fast. We embed experienced operators directly into your workstreams to deliver visible progress in 45 days. No added headcount. No hourly billing. Since 2009, we’ve helped Fortune 500s and mission-driven organizations turn stalled strategies into visible progress. Whether it’s tech rollouts, cross-functional initiatives, or at-risk programs, we...

When the answer isn’t obvious, it’s time to call in Ten Mile Square. Our clients present us with some of the most difficult technology, product, and strategy related challenges imaginable. We provide the leadership, experience, processes, technical know-how, and focus on business value necessary to deliver products and technology that succeed in the marketplace for the long-term. Our services span the...

The Center for Applied Linguistics (CAL) is a private, non-profit organization founded in 1959. Headquartered in Washington DC, CAL has earned an international reputation for its contributions to the fields of bilingual and dual language education, English as a second language, world languages education, language policy, assessment, immigrant and refugee integration, literacy, dialect studies, and the education of linguistically and...

Middle Seat is a full-service media and fundraising firm for progressive causes and candidates. We’re writers, designers, coders, and strategists passionate about making real change. Whether you’re looking to engage supporters or reach new audiences, you can count on us to run smart, authentic campaigns that drive results. We’re proud to be the first media and fundraising firm to join the Campaign...