Seattle sits at the center of the cloud economy. Amazon Web Services and Microsoft run much of the world’s infrastructure from the region, and thousands of software, retail, aerospace and healthcare companies around Puget Sound depend on it. That concentration of valuable systems makes the area a target, and AI has made attackers faster. They now use it to write convincing phishing in seconds, probe exposed services at scale and turn newly published flaws into working exploits before many teams have finished reading the advisory.
Seattle has also become one of the most active places in the country for building security products. Long-established vendors in network security, application delivery and endpoint management sit alongside a newer wave of startups working on AI security operations, data loss prevention, identity and compliance automation. Many were founded by people who spent years building security at the large cloud and software companies nearby.
This list covers ten cybersecurity companies headquartered in the Seattle area. All ten sell platforms or software-led services. If you need people to test your systems, see our separate list of Seattle penetration testing companies. For a national view, see our list of the top cybersecurity companies.
Cybersecurity Companies In Seattle At A Glance
Company
Headquarters
Best For
Core Services
F5
Seattle, WA, USA
Enterprises protecting web apps, APIs and AI applications
Web application firewall, API security, bot management, DDoS protection, AI guardrails
ExtraHop
Seattle, WA, USA
Security teams that need visibility into network traffic across hybrid environments
Large IT and security teams managing many thousands of endpoints
Endpoint management, exposure management, security operations, autonomous IT
Dropzone AI
Seattle, WA, USA
SOC teams buried in alerts that want AI to handle first-line triage
AI SOC analyst, AI threat hunter, alert investigation across SIEM, EDR, cloud and identity tools
DomainTools
Seattle, WA, USA
Threat intelligence and SOC teams investigating malicious infrastructure
DNS and domain intelligence, threat feeds, investigation platform, SIEM and SOAR integrations, MCP server
MIND
Seattle, WA, USA
Companies that need data loss prevention for users and AI agents
Data discovery and classification, data loss prevention, insider risk, AI DLP agents
Strike Graph
Seattle, WA, USA
Growing companies working toward SOC 2, ISO 27001 or CMMC
Compliance automation, risk management, evidence collection, vendor questionnaires, trust center
Hiya
Seattle, WA, USA
Carriers and businesses fighting phone fraud and voice deepfakes
Spam and fraud call blocking, AI voice detection, branded caller ID
Oleria
Seattle, WA, USA
Organizations that need to govern access for people, service accounts and AI agents
Identity security posture, adaptive identity governance, NHI and AI agent governance, identity threat response
Best Cybersecurity Companies In Seattle For 2027
1. F5 — WAF, API And Bot Protection Plus AI Guardrails
F5 is headquartered in F5 Tower at 801 Fifth Avenue in downtown Seattle. Best known for its BIG-IP application delivery products, it now sells a broad set of application security tools: web application firewalls, API security, bot management, DDoS protection, client-side protection and web application scanning. These are delivered as hardware, software and SaaS through F5 Distributed Cloud Services, so the same policies can follow applications across data centers and public clouds.
F5 has also moved quickly into AI security. Its 2025 acquisition of CalypsoAI led to F5 AI Guardrails and F5 AI Red Team, which aim to protect generative AI and multi-agent applications at runtime and test them before release. Earlier deals for Shape Security and Volterra built its bot defense and distributed cloud capabilities. F5 suits large organizations that run many customer-facing applications and APIs and want one vendor for delivery and protection. Smaller companies with a single app may find a simpler cloud WAF easier to run.
2. ExtraHop — RevealX Network Detection And Response
ExtraHop is headquartered at 520 Pike Street in Seattle and builds RevealX, a network detection and response platform. RevealX analyzes traffic across on-premises, cloud and hybrid environments, decrypts it where permitted, and uses machine learning to flag behavior that looks like an attacker moving through the network. Because it works from network data rather than endpoint agents, it can see devices and workloads that cannot run security software.
The RevealX platform combines network detection and response with network performance monitoring, intrusion detection and packet forensics, which lets security and network teams investigate from the same data. ExtraHop has been owned by Bain Capital Private Equity and Crosspoint Capital Partners since 2021. It is a strong fit for enterprises with large data centers, hybrid cloud estates or many unmanaged devices, and for security operations teams that want evidence to confirm or rule out an intrusion quickly. If you would rather outsource monitoring, see our list of MDR providers.
3. WatchGuard — Firewalls, Endpoint And MFA Built For MSPs
WatchGuard Technologies is headquartered at 255 South King Street in Seattle and has been in business since 1996. Its Unified Security Platform covers Firebox firewalls and network security services, endpoint detection and response, AuthPoint multi-factor authentication, secure Wi-Fi and managed detection and response, all managed through WatchGuard Cloud. The company says it has roughly 1,250 staff and partners in 179 countries.
WatchGuard sells only through partners, and its platform is designed around managed service providers that look after many small and midsize clients. The multi-tenant console and bundled services let an MSP run network, endpoint and identity protection for dozens of customers from one place, and the company reports that about 25,000 MSPs use its products. If you are a small business, you will most likely buy WatchGuard through a local IT provider. It is a good fit for organizations that want enterprise-style controls without building an in-house security team.
4. Tanium — Real-Time Endpoint Management And Exposure Reduction
Tanium moved its headquarters to the Seattle area in 2020 and lists its Washington office at 10400 NE 4th Street in Bellevue. Its platform gives IT and security teams a real-time inventory of every endpoint, along with patching, compliance enforcement, exposure management and security operations tools. The core idea is that the same team that finds a vulnerable machine should be able to fix it immediately, without waiting on a separate tool or a weekly scan.
Tanium’s newer product, Tanium Atlas, is pitched as an autonomous IT layer that can handle endpoint management, exposure reduction and threat response from a natural language request, with governed and auditable actions. It also offers an MCP server that brings endpoint data into AI assistants. Tanium is a strong fit for large enterprises and government agencies with sprawling device fleets and strict patching requirements. Smaller organizations may find the platform more than they need.
5. Dropzone AI — AI SOC Analyst That Investigates Every Alert
Dropzone AI is a Seattle startup that builds AI agents for security operations. Its AI SOC Analyst investigates alerts from start to finish, covering phishing, endpoint, network, cloud, identity and insider threat alerts, and shows the evidence behind each conclusion. The company was founded by Edward Wu, who spent eight years building the detection engine at ExtraHop, and it raised a $37 million Series B in 2025 led by Theory Ventures.
Dropzone connects to more than 90 tools through APIs, including Splunk, Microsoft Sentinel, CrowdStrike, SentinelOne and Okta, without moving data into a new store. It has added an AI Threat Hunter for hypothesis-driven hunts across those tools. The product suits in-house SOC teams and managed security providers that cannot keep up with alert volume and want a Tier-1 analyst that works around the clock. Teams should still review how the AI reaches its verdicts during a trial, since the value depends on the quality of their existing telemetry.
6. DomainTools — Domain And DNS Intelligence For Threat Investigations
DomainTools is a Seattle company that gives security teams intelligence about domains, DNS and the internet infrastructure attackers use. Its investigation platform lets analysts look up a suspicious domain, see who registered it, what it resolves to and what else is connected, and then pivot to related infrastructure. It also sells real-time threat intelligence feeds for domains and IP addresses that can be used to block risky destinations before an attack lands.
The data plugs into SIEM, SOAR and threat intelligence platforms such as Splunk, CrowdStrike and Microsoft Sentinel, and DomainTools now offers an MCP server that connects its DNS datasets to large language models for AI-assisted investigations. It is most useful for threat intelligence teams, incident responders and SOCs that regularly chase phishing campaigns, lookalike domains and command and control servers. Organizations without analysts to act on the data will get more from a managed service that already includes this kind of intelligence.
7. MIND — Data Loss Prevention For Users And AI Agents
MIND has offices in Seattle, at 1700 Westlake Avenue North, and in Tel Aviv. It builds a data loss prevention platform that discovers and classifies sensitive data across SaaS apps, generative AI tools, AI agents, endpoints, on-premises file shares and email, then stops that data from leaving or coaches users when they break policy. The company describes the product as deploying without hand-written rules or professional services.
Traditional DLP projects often fail because policies create so many false alarms that teams turn them off. MIND aims to fix that with AI DLP agents that investigate incidents, tune policies and fix issues automatically, and it integrates with Microsoft Purview and Okta. It also covers insider risk management. MIND suits mid-size and large companies that worry about employees pasting sensitive data into AI tools, or about AI agents reaching data they should not. Buyers should test it against their own data types during a pilot.
8. Strike Graph — Compliance Automation For SOC 2, ISO 27001 And CMMC
Strike Graph is a Seattle compliance automation company that was spun out of Madrona Venture Labs and founded in 2020. Its platform helps organizations build and run security compliance programs, with support for SOC 2, ISO 27001, ISO 42001, HIPAA, PCI DSS, HITRUST, CMMC, NIST 800-171, the NIST AI Risk Management Framework, GDPR, DORA and TISAX. It collects evidence through integrations, tracks risks and action items, and helps answer customer security questionnaires.
The platform also includes vulnerability scanning, SBOM management and a trust center for sharing security information with customers, and Strike Graph works with a network of independent audit partners for certification. It is a good fit for SaaS companies and government contractors facing their first or second audit who want a structured path rather than spreadsheets. Teams that need hands-on advice may want to pair it with a consultant from our list of GRC consulting firms.
9. Hiya — Real-Time Voice Deepfake And Phone Fraud Detection
Hiya is a Seattle company that protects phone calls. It works with mobile operators, businesses and consumers to identify callers, block spam and fraud, and flag scams before the phone rings. Its AI Voice Detection product goes further, listening during a call to spot cloned voices and scams in progress. That matters as generative AI makes it easy to fake the voice of an executive, a family member or a bank representative.
For businesses, Hiya also offers branded caller ID and number registration so legitimate calls are less likely to be marked as spam. The consumer apps, Hiya Spam Blocker and Hiya AI Phone, bring the same protection to individual users. Hiya is a strong fit for telecom carriers, contact centers, banks and any company whose customers or staff are targeted by phone-based social engineering. It is not a replacement for email or endpoint security, but it covers a channel many security programs ignore.
10. Oleria — Identity Governance For Human, Non-Human And AI Identities
Oleria is a Seattle identity security startup founded in 2022 by Jim Alkove, a longtime security executive, and Jagadeesh Kunda. Its Trustfusion platform pulls identity and access data from identity providers, SaaS applications, cloud platforms, HR systems and custom apps into one view, then adds usage data so teams can see which permissions people actually use. That makes it easier to remove access nobody needs, which is one of the most reliable ways to shrink the damage a stolen account can do.
The platform covers identity posture, access reviews and lifecycle management, identity threat detection and response, and governance for non-human identities and AI agents, which are multiplying fast as companies connect agents to internal systems. Oleria has raised a $33.1 million Series A with backing from Salesforce. It suits mid-size and large organizations with many SaaS apps and cloud accounts, where access has grown faster than anyone can review by hand. Companies with a small, single-directory setup may not need a dedicated platform yet.
How To Choose A Cybersecurity Company In Seattle
Seattle buyers can choose from mature vendors and fast-growing startups. These questions help match a provider to your actual gap.
Which Gap Are We Trying To Close First?
Start with the problem, not the product category. If you do not know what devices you have, endpoint management comes first. If alerts go unanswered, an AI SOC tool or managed service may help most. If an audit is coming, compliance automation is the priority. Buying several overlapping platforms at once usually leaves each one half deployed.
Do We Have The People To Run It?
Most of the companies on this list sell software, and software still needs owners. Ask each vendor how many staff hours a typical customer of your size spends on the product each week, and whether services or partners are available. If the honest answer is that nobody on your team has time, consider a managed provider instead.
How Does The Product Handle AI-Driven Threats And AI Use?
Ask for concrete features, not slogans. Useful examples include detection of AI-generated phishing or voice fraud, controls on what data employees can paste into AI tools, and protection for AI applications you build. Ask how the vendor itself uses AI and how you can review its decisions.
Will It Work With Our Existing Stack?
Seattle companies often run heavily on AWS or Microsoft. Check that a vendor integrates cleanly with your cloud provider, identity system, SIEM and ticketing tools. A short proof of value in your own environment, with agreed success criteria, will show more than a demo.
Is The Company Built To Last?
Startups can move faster and price more flexibly, but they carry more risk. Ask about funding, customer count and how your data would be handled if the company were acquired. Larger vendors offer stability but may be slower to add features you need.
Conclusion
Seattle offers security vendors for almost every layer of a modern program, from network and endpoint protection to AI-driven security operations, identity, data protection and compliance. Pick the gap that worries you most, shortlist two or three companies from this list that address it directly, and run each through a trial with your own data before you commit.
