Knowbe4
Tampa, US · Delaware corporation · 7 known investors
Find your way into Knowbe4
8 people in our graph share verified history with the Knowbe4 team — schools, employers, funds. One of them is your warm intro.
Mark Hatfieldunlockedknows Stu Sjouwerman, SACP · together at KnowBe4, Inc. (overlapped)
×3knows the team · via KnowBe4, Inc.
×4knows the team · via University of Amsterdam
KnowBe4 provides security awareness training, simulated phishing attacks, and AI-powered human risk management for organizations worldwide. The platform helps enterprises secure both human employees and AI agents against cybersecurity threats through attack simulation, training, and behavioral security interventions.
Founders & leadership
SS
Stu SjouwermaninFounder, Executive ChairmanStu Sjouwerman is co-founder and CEO of ReadingMinds.ai, an AI platform for analyzing customer sentiment and intent. He previously co-founded KnowBe4 and Sunbelt Software, bringing decades of experience in IT, scaling organizations, and technology development.
SS
Stu Sjouwerman, SACPinFounderStu Sjouwerman co-founded KnowBe4 and Sunbelt Software, and has a long background in IT and entrepreneurship with expertise in scaling companies and AI. Since May 2025 he has been co-founder and CEO of ReadingMinds.ai, an AI platform that analyzes customer emotions and sentiment for marketing teams.
Investors · 7
Elephant Partners✓ verifiedBostonvia Jeremiah Daly · board
Vista Equity Partners✓ verifiedNew York
Crosslink CapitalSan Francisco · $1M – $9M
March Capital PartnersSanta Monica
Ten ElevenBurlingame · $3M – $15M
Blumberg Capitalreported · 2 sourcesMiami · $500K – $5M
Gradient Venturesreported · 2 sourcesSan Francisco · $100K – $10M
Funding
SEC filings, press & company announcements$390.2M disclosed across 6 of 7 rounds · 2016–2025
- $6MSeed roundOct 2025 · 2 sources
Blumberg Capital (lead), Gradient Ventures (lead)
Source ↗ - Undisclosed amountSeries AJan 2025Source ↗
▶$309.4MraisedJun 2019 · 7 investors · Other TechnologyRule 506(b)
▶$309.4MraisedJun 2019 · 7 investors · Other Technology
Rule 506(b)Officers, directors & promoters on the filing
- Alex EckelberryDirector
- Lars LetonoffExecutive Officer
- Sjoerd SjouwermanExecutive Officer, Director
- Jeremiah DalyDirector
- Shrikrishna VenkataramanExecutive Officer
- Joseph DiSabatoDirector
- Stephen ShanleyDirector
- Kevin MitnickDirector
- Offering amount
- $309.4M
- Amount sold
- $309.4M
- Proceeds to insiders
- $308.7M
- First sale
- Jun 2019
- Incorporated
- Corporation, Delaware
- Federal exemptions
- 06b
▶$31.6MraisedMar 2019 · 2 investors · Other TechnologyRule 506(b)
▶$31.6MraisedMar 2019 · 2 investors · Other Technology
Rule 506(b)Officers, directors & promoters on the filing
- Lars LetonoffExecutive Officer
- Sjoerd SjouwermanExecutive Officer, Director
- Shrikrishna VenkataramanExecutive Officer
- Hans ShermanDirector
- Alex EckelberryDirector
- Jeremiah DalyDirector
- Kevin MitnickDirector
- Offering amount
- $31.6M
- Amount sold
- $31.6M
- Proceeds to insiders
- $10.3M
- First sale
- Feb 2019
- Incorporated
- Corporation, Delaware
- Federal exemptions
- 06b
▶$30MraisedOct 2017 · 4 investors · Other TechnologyRule 506(b)
▶$30MraisedOct 2017 · 4 investors · Other Technology
Rule 506(b)Officers, directors & promoters on the filing
- Sjoerd SjouwermanExecutive Officer, Director
- Jeremiah DalyDirector
- Kim FurlinExecutive Officer
- Kevin MitnickDirector
- Lars LetonoffExecutive Officer
- Alex EckelberryDirector
- Offering amount
- $30M
- Amount sold
- $30M
- Proceeds to insiders
- $2M
- First sale
- Oct 2017
- Incorporated
- Corporation, Delaware
- Federal exemptions
- 06b
▶$5.2MraisedMar 2017 · 1 investors · Other TechnologyRule 506(b)
▶$5.2MraisedMar 2017 · 1 investors · Other Technology
Rule 506(b)Officers, directors & promoters on the filing
- Kim FurlinExecutive Officer
- Jeremiah DalyDirector
- Sjoerd SjouwermanExecutive Officer, Director
- Alex EckelberryDirector
- Kevin MitnickDirector
- Offering amount
- $5.5M
- Amount sold
- $5.2M
- Proceeds to insiders
- $2.6M
- First sale
- Feb 2017
- Incorporated
- Corporation, Delaware
- Federal exemptions
- 06b
▶$8MraisedFeb 2016 · 1 investors · Other TechnologyRule 506(b)
▶$8MraisedFeb 2016 · 1 investors · Other Technology
Rule 506(b)Officers, directors & promoters on the filing
- Sjoerd SjouwermanExecutive Officer, Director
- Offering amount
- $8M
- Amount sold
- $8M
- Proceeds to insiders
- $3M
- First sale
- Jan 2016
- Incorporated
- Corporation, Delaware
- Federal exemptions
- 06b
Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.
Competitors · 10
by search overlapillusive networks2002 shared keywordsProofpoint offers a suite of enterprise security and compliance products that protect people, email, cloud apps, and data from human-centric cyber threats using machine learning and AI. Its tools also cover data loss prevention, communications archiving, e-discovery, compliance supervision, identity threat detection, and security awareness training.
Netezza1584 shared keywordsIBM is a global technology company whose business spans enterprise software (including Red Hat, HashiCorp, and Confluent), IT infrastructure such as mainframes, servers, and storage, and IT consulting services. The company is also investing heavily in quantum computing and AI-based enterprise offerings, including its Lightwell open-source software security clearinghouse and the Anderon quantum wafer foundry.
Crowdstrike1455 shared keywordsCrowdStrike provides an AI-native cybersecurity platform that unifies endpoint, identity, cloud, SaaS, and AI protection to detect and stop breaches for enterprise organizations. It combines automated response with human-led security operations including managed detection and response, threat hunting, and security services.
Cloudflare Turnstile1377 shared keywordsCloudflare provides a global cloud network platform delivering security, performance, and development services through sixty-plus integrated services including SASE, application security, and full-stack development infrastructure.
Check Point Software1262 shared keywordsCheck Point Software Technologies is a cybersecurity company providing security products and solutions. This page is its investor relations section, containing annual reports, SEC filings, financial results, and corporate governance information.
ArrowPoint1196 shared keywordsCisco provides networking, data center, and security technology for enterprises, including infrastructure to run traditional and AI workloads and tools to keep organizations running against cyberattacks and outages. Its platform connects networking devices and monitors security events across corporate networks.
Malwarebytes1138 shared keywordsMalwarebytes provides consumer and small-business cybersecurity software, including antivirus and web protection, a privacy VPN, ad/tracker blocking, and identity theft monitoring with insurance. It also offers a browser extension that blocks unsafe content and detects tech support scams, plus a tool for checking suspicious links and screenshots.
Trend Micro1085 shared keywordsTrendAI (Trend Micro) provides enterprise cybersecurity through its TrendAI Vision One platform, which unifies endpoint, network, cloud, and identity security with XDR visibility, threat intelligence, and AI-focused threat protection. It serves enterprise customers across 185 countries, including hybrid cloud, virtualized data center, and modern SOC environments.
Sentinel One945 shared keywordsSentinelOne provides an AI-powered cybersecurity platform for enterprises that integrates endpoint protection, threat detection, and incident response capabilities. The company serves large enterprises, including many Fortune 500 organizations, to protect against cyber threats at scale.
Palo Alto Networks944 shared keywordsPalo Alto Networks provides cybersecurity platforms and services to protect organizations' digital infrastructure across cloud, network, and security operations. The company serves enterprise organizations, governments, financial institutions, utilities, and healthcare providers globally.
Companies competing with Knowbe4 for the same Google search keywords, organic and paid, via search-intersection analysis.
In the news
Caliber Mining’s ₹450 crore IPO opens today; raises ₹135 crore from anchor investors ahead of issuefortuneindia.com · Jul 2026Frequently asked questions
- What does Knowbe4 do?
- KnowBe4 provides security awareness training, simulated phishing attacks, and AI-powered human risk management for organizations worldwide. The platform helps enterprises secure both human employees and AI agents against cybersecurity threats through attack simulation, training, and behavioral security interventions.
- Who founded Knowbe4?
- Knowbe4 was founded by Stu Sjouwerman, Stu Sjouwerman, SACP.
- Who are Knowbe4's investors?
- Knowbe4's investors include Elephant Partners, Vista Equity Partners, Crosslink Capital, March Capital Partners, Ten Eleven, Blumberg Capital, Gradient Ventures.
- How much funding has Knowbe4 raised?
- Knowbe4 has disclosed $390.2M raised across 6 of its 7 known rounds.
- Where is Knowbe4 headquartered?
- Knowbe4 is headquartered in Tampa, US.