Top Tech Startups in Washington, US in 2026

Sydecar is on a mission to transform the world of private markets. Our goal is to make these markets more accessible, transparent, and liquid, and we're achieving this by revolutionizing the way investment vehicles are created and executed. At Sydecar, we're not just a platform; we're a trusted partner in venture capital. We're dedicated to simplifying and standardizing the private investing experience, empowering capital allocators to discover and support visionary entrepreneurs who are shaping the future. Our platform is designed with ease and efficiency in mind. We take care of all the behind-the-scenes tasks, from automating banking, ensuring compliance, handling contracts, managing taxes, to streamlining reporting. This leaves investors the freedom to concentrate on what matters most: making valuable deals and nurturing meaningful relationships. Join us at Sydecar, as we lead the charge in revolutionizing private investing. Visit sydecar.io to learn more.

It currently takes the same amount of time to process an average American mortgage as it does to walk nonstop from Manhattan to San Francisco! Xpanse is working to change that. It’s our mission to create a universal platform that brings clarity, ease, automation and security to the origination process. Our SaaS platform will power the mortgage industry and its relationships with a massive network of third-party providers that are integral to the mortgage process. By focusing on the customer, using automation, real-time intelligence, big data, and analytics we are changing the way borrowers, lenders, servicers, and service providers take care of business. But disrupting an industry is a team sport – we are looking for the best and brightest to join us. Our team is growing rapidly in the Greater Seattle Area. Currently WFH. Future HQ in Downtown Bellevue.

Created in 2009 by Yael Aflalo, we design and manufacture the majority of our limited-edition collections in our factory headquarters in downtown Los Angeles. All other garments are produced by responsible manufacturing partners here in the U.S. or abroad using sustainable methods and materials. We source sustainable fabrics and vintage garments while incorporating better practices throughout our supply chain to make beautiful styles at a fraction of the environmental impact of conventional fashion. It is our mission to lead and inspire a sustainable way to be fashionable.

We are building a developer experience and ML platform around the open-source project Spice.ai, to help developers build the next generation of intelligent applications. Spice.ai is a portable runtime and set of tools that help developers add AI to their applications by leveraging ML on time-series data.

Siena AI is a developer of an autonomous chat platform that aims to transform the way it runs and interacts with consumers by combining human empathy and intelligent automation. The platform provides capabilities such as product information, order tracking, address changes, returns and product exchanges, subscription and retention management, allowing firms to conduct customer care and social media interactions autonomously.

Pulley is the first dedicated platform for construction permitting. Our purpose-built workflows, localized requirements and embedded expertise help developers, contractors, and architects get permits faster, removing a costly bottleneck to construction. Across dozens of markets, leading builders trust Pulley to permit everything from single-family homes to complex commercial projects.

We’re Civic Roundtable – a mission-driven, venture-backed startup (seed led by General Catalyst) that makes government more effective and efficient through technology. We build tools for government workers on the frontlines of public problems that matter to all of us, from preventing homelessness in our communities to administering our elections. Our first product is a collaboration and knowledge sharing platform that saves government workers time and energy by connecting them to the people they trust most: their peers. In our first year alone, we have onboarded thousands of users and are off to the races powering problem-solvers across levels and functions of government.

Applied Behavior Analysis, Occupational Therapy, and Speech Therapy: ABA is the only surgeon general recommended treatment for autism. Taking a comprehensive approach, involving occupation and speech therapy is proven to achieve the highest level of outcomes for kiddos with ASD and other developmental delays. Our commitment to clinical quality is unwavering and is at the forefront of all decision-making.

iSpot.tv helps advertisers measure the brand and business impact of TV and streaming advertising, from concept to airing to conversion. Fast, accurate and actionable measurement and attribution solutions enable advertisers to assess creative effectiveness, enhance media plans and attribute advertising results for cross-platform campaigns, all while benchmarking against competitors and historical norms. Unlike legacy and ad hoc solutions, iSpot is purpose-built to measure the performance of every ad on television with digital-like precision and granularity in real time. With always-on performance insights unified across linear and streaming TV, advertisers can take quick and confident action to consistently drive business results.

Built for the most demanding enterprise workloads, from AI and HPC simulations to Splunk Observability, genomics and PACS medical imaging, geospatial datasets, media editing and rendering, and video surveillance, the Qumulo Data Platform unlocks the full power of an organization’s information. It is a unified global file system solution that spans data centers, edge, and public clouds, enabling efficient, accelerated computing and extending the reach of data unbound by protocol or transport limitations.