Top Tech Startups in Washington DC, DC in 2026

We partner with early stage companies to prototype & launch their products.

Harmonia is a rapidly growing company that delivers powerful advanced technologies to help federal government clients harness the power of data to ensure mission success. Harmonia’s growth has been fueled by a skilled, technical employee base that delivers differentiated solutions for AI and machine learning, cybersecurity, cloud optimization, IT modernization, and data science and analytics. Harmonia proudly supports federal customers in the National Security, Federal Civilian, and Federal Health markets. Harmonia offers competitive compensation and a dynamic, productive work environment. Benefits include comprehensive medical, dental, vision, and life insurance options, 401(k) matching, and flexible PTO.

ColdSpark, Inc. provides enterprise solutions and platforms for email processing and delivery. It offers SparkEngine Mail Transport Platform, an open platform for enterprise email processing, and routing and delivery; MailFusion Email Automation System, a platform for customer email message; and Inbound Processing Manager, an in-process API application that classifies and acts upon inbound email messages. The company also provides Compliance Catalyst that allows enterprises to capture, classify, and insert automated messages into existing enterprise archiving solutions; Third-Party (Partner) Modules that support integration with open-source or commercial messaging applications; and automated paperless notification solutions for healthcare payer organizations. In addition, ColdSpark, Inc. offers a range of services, including managed services, implementation, custom consulting, and education services. It serves financial institutions and enterprises in the United States and internationally. The company was founded in 2001 and is based in Broomfield, Colorado. As of May 13, 2009, ColdSpark, Inc. operates as a subsidiary of Bakbone Software Inc.

Lemberg Health is a remote dosimetry services firm providing on-demand, expert treatment planning to radiation oncology clinics across Canada and the United States. Founded by a dual-licensed Certified Medical Dosimetrist (CMD) with clinical experience at Princess Margaret.

Blue Rose Research is a project of OpenLabs to help progressive campaigns and issue orgs make higher quality strategic decisions with better polling and message testing. In the 2022 midterms, we advised major progressive organizations on directing hundreds of millions of dollars to the right ads and states, tested thousands of ads and talking points from state legislature to governor and senate races, and gave strategic election forecasting advice that was more accurate than public polls. Our team of 20+ passionate and progressive software engineers, machine learning engineers, and social scientists specialize in: Polling: Solving fundamental problems plaguing the polling industry today by applying state of the art tools from machine learning and Bayesian statistics. Message and creative testing: Providing rapid turnaround testing guidance for communications professionals on what messaging works and what doesn’t on the key issues of the day.

At Arkenstone, we empower defense tech startups with the tools, infrastructure, and compliance solutions they need to become successful prime contractors. Our mission is to remove barriers and help innovators grow - from day one to becoming a trusted prime for the U.S. Government.