FYEO
FYEO provides hybrid AI-guided and human-validated Web3 security audits for blockchain protocols, DeFi projects, and AI-integrated dApps, including smart contract audits, agentic AI security assessments, fuzz testing, and a GitHub-integrated subscription scanner.
- Company typePrivate
- Founded2021
- HeadquartersDenver, United States
- Headcount11–50
- GTM typeB2B
- OfferingServices
What FYEO does
FYEO is a private Web3 security firm founded in 2021 and incorporated in Delaware, providing hybrid AI-guided and human-validated security audits to blockchain protocols, DeFi projects, and AI-integrated dApps. The company's methodology pairs AI models — which surface risky code diffs, vulnerable third-party library paths, and exploitable fuzz targets — with expert security engineers who validate findings, reproduce exploits, and deliver prioritized remediation. FYEO reports having secured 300+ protocols across all major chains (including Ethereum, Solana, Polkadot, Cosmos, NEAR, Sui, Aptos, Cardano, Flare, Algorand, and Ripple) with zero post-audit exploits and claims 85% fewer false positives and 40% faster delivery than traditional manual-only auditing.
The product surface includes Blockchain Security Audits, Agentic AI Security Audits (a category covering LLM-integrated dApps, prompt injection, and autonomous on-chain execution), AI-Accelerated Fuzz Testing, a 3rd Party Library Scanner supporting Rust, Python, TypeScript, and Solidity, and the AI Security Scanner — a GitHub-integrated pull-request auditor fine-tuned from 300+ expert code reviews. Beyond audit services, FYEO has shipped the FYEO Agent phishing-protection browser extension (April 2023), the Cryptophishies NFT community initiative (October 2023), and KryptPass, a patented self-custody decentralized password manager launched in June 2025.
FYEO operates a dual go-to-market: a sales-led enterprise motion for manual audits (engaged via contact form, governed by Master Services Agreements, with scoping call response within one business day and post-fix re-audit verification) and a product-led growth motion through the FYEO Scanner self-serve GitHub App with a 30-day free trial converting to tiered subscription. Revenue streams are professional-services audit engagements plus recurring Scanner subscription revenue. The company is founder-led (CEO Tammy Kahn, COO Brian Gale, CTO Thomas Olofsson, CFO David Garrity, Head of OSINT Mikael Byström), appears privately financed with no disclosed institutional funding, and is headquartered at a North Conway, NH mailing address.
FYEO firmographics
Firmographics- Name
- FYEO
- Legal name
- FYEO, Inc.
- Website
- https://fyeo.io
- Company type
- Private
- Founded year
- 2021
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- FYEO provides hybrid AI-guided and human-validated Web3 security audits for blockchain protocols, DeFi projects, and AI-integrated dApps, including smart contract audits, agentic AI security assessments, fuzz testing, and a GitHub-integrated subscription scanner.
- Ownership category
- akta.pro rank
FYEO industry classification
Industry- Product category
- Blockchain / Web3 Security Auditing
- NAICS
- Custom Computer Programming Services (541511)
- SIC
- Services-Computer Programming Services (7371), Services-Computer Programming, Data Processing, Etc. (7370)
- akta.pro primary industry
- Digital Asset Risk, Security & Audit Tooling (Smart Contract Audit, Threat Monitoring) (FSAGAMAJ)
- akta.pro secondary industries
- On-Chain Monitoring, Threat Detection & Incident Response (FSAPAJAB), Risk Scoring, Credit & Fraud Analytics (counterparty/wallet risk) (FSAPAJAF)
Keywords
Where FYEO is headquartered
LocationHeadquarters
- HQ city
- Denver
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
FYEO business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Technology or R&D, Operations, Marketing or Sales, Infrastructure
Revenue model
- Manual Security Audit Services: Hybrid AI + human-led professional security audits for smart contracts, AI-integrated dApps, and blockchain protocols. Provided under separately signed Master Services Agreement and Statement of Work. Revenue recognized as professional services engagement.
- FYEO Scanner Subscription: Automated AI-powered security scanning service offered on tiered subscription plans (monthly or annual billing). Includes free 30-day trial with no payment required. Features include repository scanning, dependency analysis, and findings dashboards. Source code processed ephemerally; findings and threat models retained per account.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Pay-as-you-go | Free Trial — 30-day evaluation period |
| Subscription | Monthly | Tiered subscription plans (specific tiers not publicly disclosed) |
Go-to-market motion2 records
Distribution channels2 records
Marketing channels4 records
FYEO product offering
Product offeringCore offering
FYEO provides hybrid AI-guided security audits for blockchain protocols, smart contracts, and AI-integrated dApps, combining proprietary AI models (for code diff analysis, dependency risk detection, and PR-level scanning) with human security engineer validation, exploitation, and remediation. Core offerings include Blockchain Security Audits, Agentic AI Security Audits, AI-Accelerated Fuzz Testing, a 3rd Party Library Scanner, and the AI Security Scanner delivered as a GitHub-integrated subscription product. The methodology supports Solidity, Rust, Move, Vyper, Python, and TypeScript across 10+ blockchain ecosystems and has been applied to 300+ protocols.
Product overview
FYEO is a Web3 security firm offering a hybrid AI + human-led security audit methodology. The core offering combines AI-powered automated analysis (via the FYEO Scanner, AI Security Scanner, and 3rd Party Library Scanner) with expert human validation to deliver actionable security findings with fewer false positives. Professional services include Blockchain Security Audits, Agentic AI Security Audits, and AI-Accelerated Fuzz Testing. The AI Security Scanner integrates directly into GitHub pull requests for continuous code review, while the 3rd Party Library Scanner maps dependency usage to identify real attack surface. FYEO has secured 300+ protocols with a track record of zero post-audit exploits.
Differentiator
Problem solved
Functional benefit
Quantifiable outcome
- 85% fewer false positives compared to automated-only approaches
- +2 more outcomes
Companies that use FYEO
Customer profileNamed customers21 records
Segments3 records
Ideal customer profiles3 records
FYEO technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration1 record
AI capability5 records
Feature6 records
FYEO partnerships and signals
Strategic signalPartnerships
Two partnerships are on record, tiered core and notable.
- NatGold DigitalcoreFYEO Inc. completed a Security Code Review of NatGold Digital's core smart-contract infrastructure. The review identified five informational recommendations — all of which were remediated — and found no issues in any severity category from low through critical, reflecting a strong security posture. Results were publicly disclosed via FYEO's GitHub audit repository. The system was engineered by FP Block.
- TruGardnotableFYEO partnered with TruGard to highlight smart contract honeypot dangers in Web3. TruGard's AI analyst detected numerous honeypots, and manual verification by FYEO confirmed the findings. The partnership aims to educate the Web3 community on smart contract honeypot risks.
Scale indicators4 records
Recent moves6 records
Expansion highlights5 records
FYEO competitors and assessment
Company assessmentDirect peers
- Zellic: Security research firm specializing in smart contract audits and Web3 vulnerability research. Closely comparable in positioning and target customer profile to FYEO.
- Spearbit: Curated network of senior security researchers offering smart contract audit and security review services. Competes with FYEO's manual expert-audit layer, particularly for premium tier-1 protocols.
- SlowMist: Blockchain security firm offering smart contract audits, threat monitoring, and on-chain analytics. Comparable product breadth to FYEO across audit and monitoring services, particularly in Asian-market protocols.
- Quantstamp: Long-standing smart contract audit firm serving a broad range of Web3 protocols. Competes with FYEO across multiple chains and has a similarly structured enterprise audit service offering.
- Trail of Bits: Established cybersecurity firm with a strong blockchain and smart contract audit practice. Directly competes with FYEO for Web3 protocol audit engagements, particularly with EVM-based and Rust-based codebases.
- Certora: Specializes in formal verification and smart contract security audits for DeFi protocols. Competes head-to-head with FYEO for high-assurance audits of complex protocol logic.
- Hacken: Blockchain security auditor offering smart contract audits, proof-of-reserve, and bug bounties. Competes with FYEO for protocol audit engagements and adjacent Web3 security services.
- OpenZeppelin: Provides smart contract security audits alongside its open-source libraries and developer tools. A top-tier direct competitor for DeFi and Ethereum ecosystem audit work, with comparable enterprise sales motion.
Broad incumbents
- Chainalysis: Blockchain analytics and compliance firm serving law enforcement, regulators, and financial institutions. Adjacent competitor in on-chain monitoring and threat intelligence; overlapping buyer profile for institutional Web3 clients.
- Consensys Diligence: Smart contract audit arm of Consensys, one of the largest Web3 software companies. Competes for the same tier-1 protocol audits as FYEO and benefits from the broader Consensys ecosystem and tooling.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks7 records
Key highlights7 records
Customer concentration
FYEO social profiles
Digital presenceFYEO financial estimates
Financial estimateRevenue estimate
Valuation estimate
FYEO leadership team
Management profileNumber of profiles
Profiles5 records
FYEO funding detail
Funding detailFunding overview
Funding rounds1 record
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
FYEO M&A and investment
M&A and investmentM&A1 record
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about FYEO
What does FYEO do?
FYEO provides hybrid AI-guided security audits for blockchain protocols, smart contracts, and AI-integrated dApps, combining proprietary AI models (for code diff analysis, dependency risk detection, and PR-level scanning) with human security engineer validation, exploitation, and remediation. Core offerings include Blockchain Security Audits, Agentic AI Security Audits, AI-Accelerated Fuzz Testing, a 3rd Party Library Scanner, and the AI Security Scanner delivered as a GitHub-integrated subscription product. The methodology supports Solidity, Rust, Move, Vyper, Python, and TypeScript across 10+ blockchain ecosystems and has been applied to 300+ protocols.
Is FYEO a public or private company?
FYEO is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was FYEO founded?
FYEO was founded in 2021. It employs 11 to 50 people.
Where is FYEO based?
FYEO is headquartered in Denver, United States, in the North America region.
How does FYEO make money?
Two revenue lines are on record. Manual Security Audit Services are the primary driver. The others are FYEO Scanner Subscription.
Who are FYEO's main competitors?
Direct peers on record are Zellic, Spearbit, SlowMist, Quantstamp, Trail of Bits, Certora, Hacken and OpenZeppelin. Broad incumbents are Chainalysis and Consensys Diligence.
Does FYEO have an API?
No public API is recorded for FYEO.
What industry is FYEO in?
FYEO's product category is Blockchain / Web3 Security Auditing. Its primary akta.pro industry code is FSAGAMAJ, Digital Asset Risk, Security & Audit Tooling (Smart Contract Audit, Threat Monitoring), with a secondary code of FSAPAJAB, On-Chain Monitoring, Threat Detection & Incident Response. Its NAICS code is 541511 and its SIC code is 7371.