/Companies

Certik

also invests · investor profileUnicorn · $526B

New York City, US · Founded 2018 · 214 employees on LinkedIn · 25 known investors

Find your way into Certik

Sign up to find every way you can get introduced to Certik

  • Your email: who you already know at Certik, and who your contacts know
  • 2nd- and 3rd-degree connections: people you know who worked, studied or invested with the Certik team
  • Your LinkedIn: the connections who can make the intro for you

We rank every route by how warm it is, so you raise on warm intros instead of cold emails.

CertiK is a Web3 security platform that combines formal verification with smart contract audits, penetration testing, on-chain monitoring, AML/compliance tools, and incident response for blockchain projects, exchanges, and wallets. It offers products such as its Skynet real-time project evaluation system and SkyInsights transaction-monitoring and AML compliance suite for Web3 companies and VASPs.

Also known as CERK · CertiK

Founders & leadership

Certik was founded in 2018 by Sergey Gorbunov, Alex Wilke, Zhong Shao, and Ronghui Gu.

SGSergey Gorbunov
Sergey GorbunovCo-Founder
AWAlex Wilke
Alex WilkeCo-Founder
ZSZhong Shao
Zhong ShaoCofounderShao has taught computer science at Yale since 1994, rising from assistant professor to full professor in 2003 and serving as department chair from 2017 to 2023. He earned his PhD at Princeton University, where he worked as a research and teaching assistant, and spent a summer at Xerox PARC before joining the Yale faculty.
RGRonghui Gu
Ronghui GuCo-Founder & Chief Executive OfficerGu holds the Tang Family professorship in computer science at Columbia University, where he joined the faculty in 2018 and was promoted to associate professor in 2024. Before that he worked as a software engineer at Google, and his research centers on formal verification applied to software and digital asset security.

Board

MZ
Muhan ZouBoard director
KJ
Kai JiangBoard director
TCTian Cheng
Tian ChengBoard directorPartner at Shunwei Capital

Investors · 25

Also in the syndicate · 1

Sequoia Capital Chinalead

Reported raises · per SEC filings

Form D private placements

$233.4M disclosed across 5 of 8 rounds · 2020–2022

▶$88MraisedMar 2022 · 15 investors · Other
Rule 506(b)
Officers, directors & promoters on the filing
  • Kai JiangDirector
  • Yaxin CaoDirector
  • Tian ChengDirector
  • Hanqing YuDirector
  • Zhong ShaoDirector
  • Muhan ZouDirector
  • Ronghui GuExecutive Officer, Director
Offering amount
$88M
Amount sold
$88M
First sale
Mar 2022
Incorporated
Corporation, Cayman Islands, 2018
Federal exemptions
06b
Full filing on SEC EDGAR ↗
▶$77.5MraisedDec 2021 · 10 investors · Other
Rule 506(b)
Officers, directors & promoters on the filing
  • Muhan ZouDirector
  • Tian ChengDirector
  • Kai JiangDirector
  • Hanqing YuDirector
  • Yaxin CaoDirector
  • Ronghui GuExecutive Officer, Director
  • Zhong ShaoDirector
Offering amount
$77.5M
Amount sold
$77.5M
First sale
Nov 2021
Incorporated
Corporation, Cayman Islands, 2018
Federal exemptions
06b
Full filing on SEC EDGAR ↗
▶$23.8MraisedAug 2021 · 8 investors · Other
Rule 506(b)
Officers, directors & promoters on the filing
  • Kai JiangDirector
  • Ronghui GuExecutive Officer, Director
  • Muhan ZouDirector
  • Tian ChengDirector
  • Zhong ShaoDirector
Offering amount
$23.8M
Amount sold
$23.8M
First sale
Aug 2021
Incorporated
Corporation, Cayman Islands, 2018
Federal exemptions
06b
Full filing on SEC EDGAR ↗
▶$36.9MraisedJul 2021 · 8 investors · Other
Rule 506(b)
Officers, directors & promoters on the filing
  • Muhan ZouDirector
  • Ronghui GuDirector
  • Kai JiangDirector
  • Zhong ShaoDirector
  • Tian ChengDirector
Offering amount
$36.9M
Amount sold
$36.9M
Sales commissions
$600K
Placement agents
Lighthouse Capital International Inc
First sale
Jul 2021
Incorporated
Corporation, Cayman Islands, 2018
Federal exemptions
06b
Full filing on SEC EDGAR ↗
▶$7.2MraisedJun 2020 · 6 investors · Other
Rule 506(b)
Officers, directors & promoters on the filing
  • Ronghui GuDirector
  • Zhong ShaoDirector
  • Muhan ZouDirector
Offering amount
$8.6M
Amount sold
$7.2M
First sale
Jun 2020
Incorporated
Corporation, Cayman Islands, 2018
Federal exemptions
06b
Full filing on SEC EDGAR ↗

Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.

Valuation · disclosed

Disclosed events
$2Bvaluation at Series B3Apr 2022
filing ↗
$1Bvaluation at Series B2Jan 2022
filing ↗
$1Bvaluation at Series B2Dec 2021
filing ↗

Source: SEC prospectus filings, and round valuations the company or its investors disclosed — follow each entry's link for the claim.

Company profile

researched Aug 2026

CertiK is a blockchain and Web3 security company headquartered in New York. Its platform combines formal verification methods with a range of security services, including smart contract and blockchain code audits, penetration testing, DLT security solutions for enterprise infrastructure, proof-of-reserves audits, on-chain monitoring, AML and risk management (SkyInsights), and incident response. It also offers regulatory advisory products such as VARA compliance solutions for Dubai VASP licensing and DORA/MiCA advisory for EU crypto-asset service providers.

The company's Skynet product provides real-time project ratings and 24/7 active monitoring of deployed smart contracts, with a public Security Leaderboard; Skynet Premium, released alongside the August 2021 funding round, added active monitoring, real-time alerts and an analytics dashboard for enterprise clients. CertiK segments its offerings for enterprises, Web3 projects, exchanges and custodians, regulators and compliance teams, and security researchers, and in July 2026 launched an invite-only "Hunt" platform for security researchers.

CertiK also publishes security and market research (for example reports on crypto hacks, North Korea-linked thefts, physical "wrench" attacks, AML enforcement trends and prediction markets) and engages in policy work, stating relationships with the U.S. Congress, the Monetary Authority of Singapore, Hong Kong SAR, the Financial Services Agency of Japan, Abu Dhabi Global Market, and Seoul and Busan governments.

Founding story

CertiK was founded by professors from Columbia University and Yale University, growing out of academic research on certified software. Cofounder Zhong Shao is the Thomas L. Kempner Professor and Chair of Computer Science at Yale, whose FLINT group developed CertiKOS, described as the first hacker-resistant concurrent operating system; co-founder and CEO Ronghui Gu is an Associate Professor of Computer Science at Columbia and a primary designer of CertiKOS and SeKVM. Founding year is given as 2017 on CertiK's about page and by EquityZen's data field, while Built In NYC and the descriptive text used by both Built In and EquityZen state 2018.

Business model

CertiK sells security and compliance services and software to blockchain and Web3 organizations, spanning one-off engagements such as code audits, penetration tests and proof-of-reserves verification, and ongoing subscription-style products such as Skynet monitoring (Skynet Premium enterprise tier) and SkyInsights AML/transaction monitoring. Sources describe enterprise clients and booked Skynet revenue but do not detail pricing.

Revenue is generated from client engagements and product subscriptions; the company reported that revenue grew 20x in the year preceding December 2021 and that Skynet booked revenue grew 2,300% since the end of 2020, while Q1 2021 revenue more than quadrupled full-year 2020 revenue.

Traction

Company-reported figures include 5,500 clients served, $526B in market capitalization assessed, 1.8 million monthly Skynet users and 117,000+ vulnerabilities detected. Earlier reported milestones were over 1,300 enterprise clients, $90 billion in digital assets secured and 23,000 vulnerabilities detected (2021), and over 1,800 audit clients by December 2021. CertiK also received Sui's top bug bounty of $600,000 for a critical vulnerability.

Latest developments

In 2026 CertiK joined Hub71 in Abu Dhabi as a preferred security and compliance vendor for startups (July 2026), launched an invite-only Hunt platform for security researchers (July 2026), and published research on crypto hack losses ($1.3 billion in 2026), physical/"wrench" attacks, North Korea-linked theft, AML enforcement overtaking SEC securities cases as the top crypto risk, and prediction market growth to $63.5B in 2025. It also engaged with Brazil's central bank on VASP rules and participated in the United Nations Global Fraud Summit 2026.

▸Full profile — market position, technology, go-to-market, geography, history, risks & controversies

Market position

CertiK describes itself as the largest Web3 security platform and largest blockchain security auditor. Third-party recognitions cited include CB Insights Top 50 Blockchain Companies, World Economic Forum Global Innovator status, and "Companies to Watch in 2023" and a Global Awards Silver Winner listing. It holds SOC 2 Type I and Type II and ISO 27001 attestations for the platform hosting its services (Skyharbor).

CertiK positions its use of formal verification, rooted in academic research at Columbia and Yale (CertiKOS, SeKVM, DeepSEA), as its distinguishing capability, combined with a full-lifecycle suite spanning audits, continuous on-chain monitoring, AML/compliance and incident response rather than point audits alone. Its founders and senior staff include university professors and former security leaders from Baidu, Kaspersky, Ethereum Foundation and Polygon Labs.

Technology

The core technology is formal verification applied to smart contracts and blockchain systems, supplemented by AI-based analysis and monitoring. Related research assets include CertiKOS, SeKVM and DeepSEA, a language for writing verified smart contracts. Work cited on the company site includes formal verification of TON's consensus module, formal verification of HyperEnclave core components (paper accepted at ASPLOS'24), the first formal proof of a zero-knowledge proof VM circuit with Delphinus Lab (zkWasm), and Rocq tactics for zkVM modular arithmetic delivered under an Ethereum Foundation grant. The company also reports vulnerability discoveries in Apple's iOS kernel, Samsung mobile blockchain solutions and Ledger wallets.

Go-to-market

CertiK sells directly to enterprises and Web3 projects via a "talk to an expert" consultative motion, and builds visibility through free/public tools (Skynet ratings and the Security Leaderboard, cited at 1.8 million monthly Skynet users), published security and market research, media commentary, partnerships with exchanges and infrastructure providers, participation in bug bounty programs, regulatory and policy engagement, and ecosystem programs such as joining Hub71 in Abu Dhabi as a preferred security and compliance vendor.

Web3 protocols and blockchain projects, crypto exchanges and custodians, enterprises pursuing institutional blockchain adoption, regulators and compliance teams, virtual asset service providers, and security researchers. Named clients or counterparties in sources include Aave, Polygon, Binance Smart Chain, Terra, Yearn, Chiliz, OKX, Fireblocks, Bitget Wallet, LINE Blockchain, TON, SEI Protocol and Sui.

Geography

Headquartered in New York, with a globally distributed team of researchers, engineers and security experts and a remote-friendly hiring model (job postings across multiple U.S. and international locations). Regulatory and business engagement spans the United States, Singapore, Hong Kong, Japan, Abu Dhabi, South Korea and Brazil.

History

After its founding by Columbia and Yale academics, CertiK expanded from formal verification research into commercial blockchain auditing and monitoring. In 2021 it raised a Series B and a $24M Series B+ led by Tiger Global (announced August 2021), bringing total fundraising past $70M, and closed an $80M B2 round led by Sequoia Capital China in December 2021 at a nearly $1B valuation, taking total investment to just over $140M. Executive hires around that time included VP of Engineering David Tarditi (previously Microsoft) and VP of Marketing Monier Jalal. The company reported over 1,300 enterprise clients in 2021 and over 1,800 audit clients by December 2021; its site later cites 5,500 clients served.

Risks & controversies

The provided sources do not describe controversies. Notable ambiguity: founding year is reported inconsistently across sources as 2017 and 2018, and self-reported metrics on the company website (clients, valuation, users) are not independently verified in the material provided.

Compiled by commissioned research from 12 cited public sources — announcements, filings, and press listed under research sources below.

Key figures

latest reported
Audit clientsJan 20221,800 clients
Clients servedJan 20265,500 clients
Company-stated valuationJan 2026$2B
Crypto assets protectedApr 2022$300B
Enterprise clientsApr 20222,500 clients
Enterprise clients servedAug 20211,300 clients
HeadcountApr 2022200 employees
Market cap assessedJan 2026$500B
Market capitalization assessed (Skynet)Jan 2026$526B
Monthly Skynet usersJan 20261,800,000 users
Security Leaderboard user growthJan 2022Total users grown 2,000%
Skynet booked revenue growthJan 2022Grown 2,300% since end of 2020
Total employeesJan 2026133 employees
Total funding raisedDec 2021$140M

Company-reported or press-reported figures, each dated to when it was claimed — not independently audited.

Timeline · 28

launches, deals, and filings
Jul 2026
CertiK joins Hub71 as preferred security and compliance vendor

CertiK becomes an official Hub71 vendor to provide Web3 security and compliance services to startups.

source ↗

Jul 2026
CertiK launches invite-only Hunt platform for security researchers

source ↗

Jun 2026
Skynet 2026 Stablecoin Threat Intelligence Report

Report examining attacks on stablecoin financial infrastructure and sanctions evasion via the ruble-backed stablecoin A7A5.

source ↗

Mar 2026
Skynet Crypto ATM Fraud Report

source ↗

Jan 2026
CertiK earns Sui's top bug bounty of $600,000

Awarded for uncovering a critical vulnerability with the potential to shut down the Sui network.

$600K source ↗

Jan 2026
CertiK researcher inducted into Ledger Hall of Fame

Recognition for a discovery that enhances Ledger wallet security.

source ↗

Jan 2026
CertiK and OKX partner on ecosystem security

Partnership to enhance security across OKX's ecosystem.

source ↗

Jan 2026
CertiK joins LINE Blockchain as governance member and node validator

Follows completion of a security audit of LINE Blockchain.

source ↗

Jan 2026
Delphinus Lab and CertiK partner on zkWasm security

CertiK completed what it describes as the first formal proof of a zero-knowledge proof VM circuit.

source ↗

Jan 2026
Recognition in Apple iOS 17 security update

CertiK was credited in Apple's iOS 17 security update for three critical vulnerabilities in the iOS kernel.

source ↗

Jan 2026
Sui top bug bounty of $600k

CertiK earned Sui's top bug bounty for uncovering a critical vulnerability with potential to shut down the network.

$600K source ↗

Jan 2026
Ethereum Foundation grant work on Rocq tactics for zkVMs

Under an Ethereum Foundation grant, CertiK delivered improved Rocq tactics for modular arithmetic and packed integer handling in zkVMs.

source ↗

Jan 2026
LINE Blockchain audit and validator role

CertiK completed a security audit of LINE Blockchain and will join the network as a governance member and node validator.

source ↗

Jan 2026
Partnership with Delphinus Lab on zkWasm security

CertiK completed what it describes as the first formal proof of a zero-knowledge proof VM circuit.

source ↗

Jan 2026
Partnership with OKX on ecosystem security

CertiK and OKX partnered to enhance security across OKX's ecosystem.

source ↗

Feb 2025
CertiK Ventures investment in Zoo Finance

source ↗

Apr 2022
$88M Series B3 at $2B valuation

Co-led by Insight Partners, Tiger Global and Advent International, with Goldman Sachs, Sequoia Capital and Lightspeed Venture Partners participating.

$88M source ↗

Jan 2022
$80M Series B2 at nearly $1B valuation

$80M source ↗

Jan 2022
David Tarditi joins as VP of Engineering

Dr. David Tarditi, previously 16+ years at Microsoft, joined CertiK as Vice President of Engineering.

source ↗

Jan 2022
Monier Jalal joins as VP of Marketing

Monier Jalal, with over 20 years of cybersecurity leadership experience, joined CertiK as Vice President of Marketing.

source ↗

Jan 2022
Release of Skynet 24/7 monitoring platform

CertiK released Skynet, an active-monitoring platform detecting and protecting blockchains against attacks.

source ↗

Dec 2021
CertiK closes $80M B2 round at nearly $1B valuation

Round led by Sequoia Capital China with participation from Tiger Global, Coatue Management and GL Ventures; third round in four months, bringing total investment to just over $140M.

$80M source ↗

Dec 2021
David Tarditi joins as VP of Engineering; Monier Jalal joins as VP of Marketing

Tarditi previously spent over 16 years leading engineering and research teams at Microsoft; Jalal has over 20 years of cybersecurity leadership experience.

source ↗

Dec 2021
Release of Skynet 24/7 active-monitoring platform

Skynet detects and protects blockchains against sophisticated attacks; booked revenue grew 2,300% since end of 2020.

source ↗

Aug 2021
CertiK raises $24M Series B+ led by Tiger Global

Second fundraising round closed in under a month, bringing total fundraising to over $70M; led by Tiger Global partner Pengfei Wang.

$24M source ↗

Aug 2021
Release of Skynet Premium

Active-monitoring platform providing real-time alerts on deployed smart contracts, with an analytics dashboard for enterprise clients.

source ↗

Jan 2021
$24M Series B+ led by Tiger Global

$24M source ↗

Jan 2021
Launch of Skynet Premium active-monitoring platform

CertiK released Skynet Premium, providing real-time alerts on deployed smart contracts and an enterprise analytics dashboard, alongside its $24M Series B+ round.

source ↗

Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.

Legal entities · 1

corporate structure
CertikCayman Islands

In the news

▸Research sources · 12

primary sources listed

12 public sources were cited for this profile; the first-party ones are listed here.

Frequently asked questions

What does Certik do?
CertiK is a New York-based Web3 security platform combining formal verification with smart contract audits and compliance tools.
Who founded Certik?
Certik was founded by Sergey Gorbunov, Alex Wilke, Zhong Shao, Ronghui Gu in 2018.
Who are Certik's investors?
Certik's investors include 10T Fund, Candaq Fintech Group, Coatue Management, Coinbase Ventures, Continue Capital, Cyberport Hong Kong, Eureka Partners, Fenbushi Capital and 16 more.
How much funding has Certik raised?
Certik has disclosed $233.4M raised across 5 of its 8 known rounds.
Where is Certik headquartered?
Certik is headquartered in New York City, US.