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DNSFilter

AI-powered DNS protection and content filtering

Overview

DNSFilter provides AI-powered DNS threat protection and content filtering for enterprises, MSPs, and ISPs. It works by evaluating DNS requests to block phishing, malware, ransomware, and other threats, using customizable network-level and time-based filtering rules that integrate into existing security stacks. Its global anycast network ensures fast, reliable protection and scalable capacity for large organizations, with a white-labeled partner program for MSPs and ISPs to offer the service under their brands. The goal is to deliver easy-to-deploy, manageable DNS-based protection that reduces risk for customers while enabling partners to extend security services under their own brands.

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About DNSFilter

Simplify's Rating
Why DNSFilter is rated
C+
Rated C on Competitive Edge
Rated B on Growth Potential
Rated C on Differentiation

Industries

Data & AnalyticsEnterprise SoftwareCybersecurityAI & Machine Learning

Company Size

51-200

Company Stage

Series A

Total Funding

$61.2M

Headquarters

Washington DC, District of Columbia

Founded

2015

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What believers are saying

  • September 15, 2026 newsroom highlights AI-gap survey, keeping DNSFilter topical and visible.
  • June 30, 2026 MSP program and August 24, 2026 Blumira integration deepen distribution.
  • February 3, 2026 security report showed 30% more threats, strengthening demand for protection.

What critics are saying

  • DNS-only architecture misses encrypted payloads; dope.security and full SWGs expose that gap now.
  • Cisco Umbrella's September 30, 2026 switch offer pressures pricing and steals renewals.
  • Microsoft, Cisco, and Cloudflare bundle adjacent security into suites, compressing standalone pricing by 2027.

What makes DNSFilter unique

  • June 23, 2026 CMO hire signals category-building around AI DNS and channel scale.
  • July 8, 2026 OEM program embeds DNSFilter inside third-party products, including eero.
  • March 17, 2026 CyberSight adds user-behavior analytics beyond plain DNS blocking.

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Funding

Total Funding

$61.2M

Above

Industry Average

Funded Over

5 Rounds

Notable Investors:
Series A funding typically happens when a startup has a product and some customers, and now needs funding to scale. This money is usually used to grow the team, expand marketing, and improve the product. Venture capital firms are frequently the main investors here.
Series A Funding Comparison
Meet Average

Industry standards

$15M
$8.2M
$15M
$15M
$30M

Benefits

  • Full medical, dental, and vision benefits for US, UK, and Canada-based employees
  • Full short-term disability and life benefits; available long-term disability
  • Retirement savings account options with vested company matching for qualifying employees
  • Paid company-wide week off at the end of each year
  • Flexible Vacation Policy
  • Pathway to promotion to additional organizational positions and responsibilities based upon results and performance, not just time in the chair.
  • Awesome company swag
  • We Offer: Full medical, dental, and vision benefits for US, UK, and Canada-based employees
  • In-person annual gatherings. Last time we all spent a week on a beach in Cancun!
  • Hybrid company compensation details
  • Participation in E-Verify program

Growth & Insights and Company News

6 month growth

0%

1 year growth

0%

2 year growth

3%
Telecom Reseller
Nov 6th, 2026
What DNS can reveal about modern cyber threats.

What DNS can reveal about modern cyber threats. * @Evan Kirstel, Special to Technology Reseller News * Interested in being a guest? Email Telecom Reseller at [email protected] * Read more from Evan A single click can be the start of a breach, but the request that happens right before that click loads a page is even more revealing. Telecom Reseller sit down with Ken Carnesi, Chief Executive Officer & Co-Founder, DNSFilter to unpack why DNS security is such a powerful point of control in modern cybersecurity and why so many attacks touch the domain name system somewhere along the way. If you've ever heard the saying "it's always DNS," you'll understand it at a deeper level by the end of this conversation. Telecom Reseller walk through how DNS filtering works in real life, from blocking obvious malicious domains to catching brand-new phishing links before traditional tools have time to catch up. Ken shares how machine learning can categorize and re-categorize domains fast, why "good yesterday" does not mean "safe today," and what that means for enterprise security teams trying to protect employees, guest Wi-Fi, and hard-to-manage devices like IoT and specialized equipment. Telecom Reseller also get honest about limits: DNS is not the only layer you need, and defense in depth still matters. Then Telecom Reseller go straight into the AI shift. Ken explains DNSFilter's Luminate launch, including Agent Shield, built for a world where AI agents generate their own traffic and may soon outnumber humans online. Telecom Reseller also talk about the attacker side, why the pace of "Black October" feels different, and a practical takeaway for CISOs: start using the same AI-powered tools against your own environment more frequently so you can react in days and hours, not weeks. If you care about DNS security, phishing protection, threat intelligence, and what AI means for the next era of network security, hit subscribe, share this with a teammate, and leave a review with your biggest question about securing AI agents.

CXO Insiders
Nov 5th, 2026
DNSFilter appoints Justin Foster to its executive team as CTO.

DNSFilter appoints Justin Foster to its executive team as CTO. * November 5, 2026 DNSFilter recently announced a major leadership expansion. The company appointed Justin Foster as its new Chief Technology Officer. Moreover, through this appointment, the company reinforces its executive team, considering that it has made recent additions among the top executives. As a result, the company is fast-tracking its AI-driven security infrastructure expansion efforts. Justin Foster has joined DNSFilter from his former job at Forescout, where he was the Chief Technology Officer and responsible for the research and development of the company. Additionally, he has more than 25 years of experience in security. His background covers cloud security, server protection, and encryption analytics. Earlier, he co-founded Cysiv before its acquisition by Forescout. Additionally, he held key technical roles at Trend Micro and Third Brigade. Tackling Shadow AI and dns-first protection. Modern workers embrace generative AI technologies at a rate quicker than the IT team can keep up with. According to statistics, AI security is considered by 40.3% of businesses as their primary investment. But 43% of organizations realize unauthorized access to AI technologies only after an incident happens. Hence, Shadow AI becomes the main problem for CISOs moving into 2027. Every connection starts with a lookup hence, DNSFilter blocks the request before the model and storage of data are loaded. "Justin has built security companies from the ground up - he co-founded Cysiv, then ran R&D at Forescout. We just launched LUMINATE by DNSFilter(TM) at Nasdaq and opened the platform up to a much bigger market, and Justin is the right leader to scale it. Our customers are going to see the impact in the product quickly," said Ken Carnesi, CEO of DNSFilter. "Shadow AI is one of the biggest gaps security teams face today, and it starts with the first connection a user makes," said Justin Foster, CTO, DNSFilter. "I'm joining DNSFilter at a strategically important time. The new platform LUMINATE by DNSFilter(TM) extends our DNS-first protection capabilities to include AI governance and controls, behavior analytics, and threat intelligence for the first time. I look forward to working with Ken and the team to build on that amazing foundation and scaling it for all our customers and partners." Global enterprise adoption and ecosystem reach. Today, over 57,000 customers rely heavily on DNSFilter worldwide. This broad client base spans global enterprises, government agencies, and educational institutions. Furthermore, the company delivers solutions through a robust global partner network. Key partners include CrowdStrike, Amazon, GuidePoint Security, and Pax8. Therefore, the executive team aims to scale protection across all client tiers effectively. For more stories on technology leaders shaping the future of enterprise solutions, visit its CXO Insiders.

Associated Press
Nov 4th, 2026
DNSFilter appoints ex-Forescout executive Justin Foster as CTO to scale AI security platform

DNSFilter, a DNS-first security company, has appointed Justin Foster as chief technology officer. Foster joins from Forescout, where he was chief technology officer and oversaw research and development. He has more than 25 years of information security experience. He joined Forescout through its acquisition of Cysiv, which he co-founded and where he was chief technology officer. The hire follows the recent appointments of Rich Scott as chief revenue officer and Conor Coughlan as chief marketing officer. DNSFilter recently launched its LUMINATE platform, which adds AI governance and controls, behavior analytics, and threat intelligence to its DNS protection. "Justin is the right leader to scale it," said chief executive officer Ken Carnesi. More than 57,000 customers use DNSFilter.

Help Net Security
Oct 27th, 2026
DNSFilter LUMINATE unifies DNS security, AI controls and remote work protection.

DNSFilter LUMINATE unifies DNS security, AI controls and remote work protection. DNSFilter has launched LUMINATE by DNSFilter, a security platform that allows organizations to deliver five security solutions from one agent, one console and one policy. Shadow AI is now one of the fastest-growing risks in business. Employees are adopting AI tools and agents faster than security teams can approve them, often without any visibility from existing security technology. Nearly a third of employees using generative AI at work are doing so without their employer's permission, according to Deloitte's 2026 GenAI Workforce Survey. LUMINATE by DNSFilter closes that gap at the DNS layer and complements the tools organizations already have, while opening DNSFilter's proprietary threat intelligence to SOC analysts and researchers who need earlier warning of emerging attacks. DNSFilter brings the platform to market from a position of scale. The company protects more than 57,000 organizations across every vertical including central and local government, health and education, transportation, retail, hospitality and more. Blocking more than 235 million threats every day and securing over 100 million users as part of its OEM technology partners, DNSFilter provides the first line of defense before the internet, dealing with over 6 trillion queries every month. "Every business we talk to wants the same three things: spend less on security, manage fewer vendors and be better protected than they were last year," said Ken Carnesi, CEO of DNSFilter. "We've spent over a decade stopping attacks at the very first step, before they ever reach a device. LUMINATE by DNSFilter extends that same protection to AI tools, AI agents, remote workers and the devices other tools miss, all from one console. That's how you get all three." What LUMINATE by DNSFilter delivers for businesses: * Fewer vendors, lower total cost. Customers can start with one suite and add others without a new deployment, new hardware or a new procurement cycle, replacing overlapping point products as contracts come up for renewal. * Earlier warning on emerging threats. Drawing on one of the largest real-time DNS datasets in the market, security teams can spot suspicious domains before they are weaponized and quickly measure their exposure after a breach or advisory. * Control over AI use. Organizations gain visibility into which AI tools and agents employees are using and can set clear policies for what is allowed, closing a governance gap that most security stacks cannot yet address. * Faster investigations, so analysts save time. User behavior analytics reduces incident reconstruction from days to minutes and brings unapproved software and shadow IT into view. * Protection for devices other tools miss. Coverage extends to unmanaged, IoT and operational technology devices that cannot run a traditional security agent. * Secure remote work without VPN complexity. Encryption and privacy controls protect off-network users without the cost and management burden of expanding VPN infrastructure. "Customers don't want another dashboard. They want help taking real work off their plate and reducing the number of vendors they manage. AI is changing how teams operate, and with it new risks with employees adopting AI tools faster than IT can track," said Rich Scott, CRO, DNSFilter. "Demand for AI governance and security is strong, and we are meeting that moment for our customers and partners. LUMINATE by DNSFilter lets organizations evolve their toolset as their threat landscape changes and for our MSP and channel partners, it creates new revenue within accounts they already manage and service." "We built one engine instead of five, so every suite a customer adds makes the others more effective," said Kate Trojanowski, VP of Product and Engineering at DNSFilter. "It works alongside the infrastructure customers already have. There is no rip and replace, no lock-in and no forced migration, which means value starts in minutes, not after a year-long project." The platform brings together DNSFilter's core technology with capabilities from its acquisitions of Guardian in 2022 and Zorus in 2025, now fully integrated into a single offering.

DNSFilter
Sep 12th, 2026
DNSFilter Raises Another $15 Million in Series A Extension from Insight Partners

Cybersecurity company and fastest DNS resolver in the world, DNSFilter, has secured an additional $15M in funding from Insight Partners.

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