Top Security Startups in Austin, TX

NexGenT is building the largest online IT school to help millions of people transition into tech jobs. Our mission is to inspire, create, and empower the next generation IT workforce by providing the highest quality tech education that is affordable to anyone.

Sardine helps fintech, crypto, and web3 companies "move money confidently" by developing fraud, compliance, and payment infrastructure. With Sardine, builders can focus on growing their business instead of spending time, fighting against fraudsters. We're growing incredibly fast and powering over 100 customers around the world like Brex, MoonPay, Bakkt, Luno, Transak, Chippercash, Candy Digital, Metamask, Brave, and RelayFi.

For many organizations, the most valuable asset is their data. Whether source code, product designs, customer records, financial results, or pricing models, every organization has information they don’t want to get in the hands of competitors, sold on darknet marketplaces, or exposed publicly. Keeping that data safe has been a challenge, until now. Cyberhaven gives organizations the tools to safeguard their data from theft or misuse. In the process, we’ve become the standard for Data Detection and Response (DDR), the category we helped create.

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.

Opal Security is intelligent access management that empowers enterprises to move fast while staying secure. Our mission is to bring clarity, control, and confidence to complex enterprise environments, helping teams govern access without slowing down innovation.

In the AI era, proving who is behind an account or action has become harder, and more important, than ever. Nametag gives organizations a clear way to know the real human behind digital actions. Our workforce identity assurance platform verifies the real human behind high-risk actions across hiring, password resets, account recovery, and AI-initiated actions.

Vannevar Labs builds software for the country's most critical national security problems. We are uniquely qualified to succeed in this $740B market; our founders have 30 years of combined experience across national security, government sales and CIA, In-Q-Tel, DoD/JSOC, Harvard, and Stanford. We're supported by a number of VCs, including Felicis, DFJ Growth, Point72, Costanoa, and General Catalyst, amongst others. We believe our military service members and intelligence officers deserve access to the best technology American innovation can offer, and we are building great products for this mission. If you're someone who wants to work with conscientious people on things that matter, we'd love to hear from you!

VIKR Technologies builds digital credentials that let federal contractors prove they're legitimate, instantly. The problem Proving that a government contractor is who it claims to be still runs on phone calls, screenshots and paperwork that is out of date the moment it prints. Prime contractors carry real exposure for their subcontractors' standing, and the only tools are manual lookups, repeated by compliance teams for every contract and every contractor. What we do VIKR issues a digital credential that carries its own proof. We gather a contractor's standing from multiple independent sources, not a single list, and cross-check them so no one record can be wrong or gamed. The verified result is sealed into a credential with a signature that cannot be faked or altered, with a record of where each piece came from. Anyone checking confirms in seconds that it is genuine, sees what it is based on, and makes their own call. No login, no portal, no phone call, and it works offline, because audits often happen in rooms without connectivity. Verify once at the source, trust it everywhere after. We supply the proof; the party checking keeps the decision. Why we exist We believe trust should not expire. Every federal subcontract rests on a check that goes stale the day it is filed, and the company relying on it never hears when the facts change. VIKR exists to make proof that stays current. Where we are VIKR Technologies, Inc. is incorporated in Delaware, the patent application is filed, and the production system runs end to end today, from source data to a signed credential anyone can verify. Federal contractors are our first market, an entry point rather than a ceiling. How we're built VIKR is governed by an independent director, and its CEO will run the company. The founder built the technology and stays out of daily operations by design. We are hiring our first CEO now.

Theori is tackling the most difficult cybersecurity challenges by combining expertise and AI. We began by securing our customers and their products through top-tier security assessments and vulnerability research. Now, we are utilizing AI to bring these capabilities to the rest of the market. Our Xint AI cybersecurity platform brings together two technologies: Xint Web, an automated web vulnerability penetration tester, and Xint Code, an AI-first static source code analyzer based on our award-winning work in DARPA's AIxCC. These technologies meet customers where they are at today, with a focus on low false positives to avoid overloading developers with unnecessary work. We are excited to be a part of this next evolution of cyber security and bringing our cybersecurity expertise to customers large and small.