BlockSec
- Company typePrivate
- Founded2021
- HeadquartersHong Kong, Hong Kong SAR China
- Headcount51–100
- GTM typeB2B
- OfferingSoftware
What BlockSec does
BlockSec is a Hong Kong-headquartered blockchain security infrastructure company founded in 2021 that provides a full-stack platform combining smart contract auditing, real-time threat detection, AML/CFT compliance screening, and on-chain fund tracing. Its product architecture centers on the Phalcon suite—Phalcon Security (mempool-level threat detection with automatic attack-blocking via transaction front-running), Phalcon Compliance (KYT/KYA screening across 400M+ labeled addresses), and Phalcon Network (a public intelligence network for illicit-fund monitoring)—complemented by MetaSleuth for on-chain investigation and STOP for L2 sequencer-level protection. The company supports more than 15 blockchain networks including Ethereum, Tron, BSC, Polygon, Base, Optimism, Arbitrum, Avalanche, Linea, Scroll, Mantle, and Solana. BlockSec serves 500+ client organizations across 50+ countries, with named customers spanning DeFi protocols (Saddle Finance, Manta, HomeDao), centralized exchanges (Bybit, Cobo), and blockchain infrastructure providers.
Revenue is generated through three primary mechanics: recurring subscriptions for Phalcon Security and Phalcon compliance products, professional-service fees for smart contract and infrastructure audits (delivered via multi-auditor cross-review and in-house fuzzing tooling), and usage-based pricing for the Phalcon Compliance credit model and Transaction Simulation API. Go-to-market combines direct enterprise field sales for major clients (protocols, chains, CEXs) with a product-led growth motion through free tools (Phalcon Explorer, MetaSleuth, Anti-MEV RPC, USDT Freeze Checker). Distribution is augmented by ecosystem partnerships—Morph Payment Accelerator for audit services, Cobo for KYT integration into payment APIs, and Bitget for co-developed exchange security standards. The company holds SOC 2 Type 2 and GDPR certifications, has raised approximately USD 8.25M across two early-stage rounds (2021, 2022), and operates a wholly-owned subsidiary, Block Sec Arena, focused on early-stage startup security services.
BlockSec firmographics
Firmographics- Name
- BlockSec
- Legal name
- BlockSec
- Website
- https://blocksec.tech
- Company type
- Private
- Founded year
- 2021
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Ownership category
- akta.pro rank
BlockSec industry classification
Industry- Product category
- Blockchain Security & Compliance Software
- akta.pro primary industry
- Digital Asset Risk, Security & Audit Tooling (Smart Contract Audit, Threat Monitoring) (FSAGAMAJ)
- akta.pro secondary industries
- Security Testing Tooling (SAST/DAST for smart contracts, fuzzing) (FSAPAJAK), Blockchain Analytics & Transaction Monitoring (FSADALAB), Wallet Risk Scoring, Address Screening & Exposure Checks (FSADALAD), Smart Contract Security Tooling (static/dynamic analysis, formal verification) (FSAPABAI), Monitoring, Observability & Incident Response (alerts, traces, runtime monitoring) (FSAPABAJ)
Keywords
Where BlockSec is headquartered
LocationHeadquarters
- HQ city
- Hong Kong
- HQ country
- Hong Kong SAR China
- HQ region
- Asia
Offices1 record
Markets served
BlockSec business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Personnel, Technology or R&D, Infrastructure, Marketing or Sales, Operations
Revenue model
- Security Monitoring Subscriptions: Phalcon Security and Compliance products operate on subscription-based models with tiered plans. Enterprise clients receive real-time threat monitoring, automatic attack blocking, and compliance screening as recurring services.
- Smart Contract Audits: One-time professional services for security audits of smart contracts, infrastructure, and blockchain protocols. Includes architecture review, threat modeling, and multi-auditor cross-review with actionable remediation guidance.
- Phalcon Compliance Credit-Based Usage: Phalcon Compliance 3.1 introduced a flexible credit-based usage model where organizations pay per screening query, supporting high-volume platforms through batch queries with millisecond-level screening speed.
- API Access: Transaction Simulation API and KYT/KYA APIs offered on usage or subscription basis for developers and enterprises requiring programmatic access.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Multi-year contract | Morph Payment Accelerator Audit Partner - 20% discount |
| Usage-based | Pay-as-you-go | Phalcon Compliance 3.1 Credit-Based Model |
| Freemium | Monthly | Free Tools |
Go-to-market motion2 records
Distribution channels4 records
Marketing channels6 records
BlockSec product offering
Product offeringCore offering
BlockSec provides end-to-end blockchain security and compliance infrastructure for Web3. The Phalcon platform offers real-time threat detection and automatic attack blocking for smart contracts, KYT/AML compliance screening across 400+ million labeled addresses, on-chain fund tracing, and smart contract/infrastructure security audits for DeFi protocols, centralized exchanges, L1/L2 chains, stablecoin issuers, and crypto payment providers.
Product overview
BlockSec offers a unified platform architecture combining security and compliance products. The core Phalcon suite includes Phalcon Security for real-time threat detection and blocking, Phalcon Compliance for AML/KYT compliance screening, and Phalcon Network for illicit fund monitoring. These are complemented by developer tools including Phalcon Explorer (transaction visualization), MetaSleuth (fund tracking), MetaSuites (20+ explorer enhancements), Transaction Simulation API, and Anti-MEV RPC. Specialized monitoring includes Safe{Wallet} Monitor for multi-signature wallet security and STOP for L2 Chains for Sequencer-level attack prevention. Professional services include Smart Contract Audits and Infrastructure Audits. The company also operates Block Sec Arena as a subsidiary for startup-focused security services.
Differentiator
Problem solved
Functional benefit
Brands
- Phalcon: Security and compliance product suite including Phalcon Security (real-time threat detection and blocking), Phalcon Compliance (KYT/AML screening), Phalcon Network (illicit fund monitoring), and Phalcon Explorer (transaction visualization and simulation)
- MetaSleuth
- MetaSuites
- Block Sec Arena
Products and services
- Phalcon Security
Quantifiable outcome
- Over USD 20 million recovered from past attacks through Phalcon platform intervention
- +4 more outcomes
Companies that use BlockSec
Customer profileNamed customers10 records
Segments6 records
Ideal customer profiles4 records
BlockSec technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration5 records
AI capability7 records
Feature11 records
BlockSec partnerships and signals
Strategic signalPartnerships
Four partnerships are on record, tiered core, major and minor.
- CobocoreBlockSec partnered with Cobo to integrate its Know Your Transaction (KYT) risk engines into Cobo's Payment API for cross-border payments. The collaboration provides global enterprises with compliance scanning, automated reconciliation, and fund management capabilities while incorporating Phalcon Compliance technology for real-time anti-money laundering protections.
- MorphmajorBlockSec joined Morph Payment Accelerator as official audit partner, providing smart contract audits and penetration testing at 20% discount to participating companies. The $150M performance-based accelerator incentivizes payment companies building on Morph mainnet based on verified stablecoin payment volume. BlockSec offers Phalcon product suite for threat monitoring and infrastructure security.
- BitgetcoreBlockSec and Bitget jointly released the UEX Security Standard research report establishing a system-level security framework for exchanges operating across crypto, tokenized assets, and traditional financial markets. The five-benchmark standard covers verifiable solvency, multi-asset risk isolation, data security, AI-based dynamic monitoring, and resilient application defense. Bitget CEO Gracy Chen and BlockSec CEO Yajin Zhou co-authored the framework.
- Fomo_inminorBlock Sec Arena announced strategic partnership with Fomo_in to deliver comprehensive security and growth solutions for blockchain startups. Block Sec Arena provides smart contract audits and threat detection while Fomo_in offers marketing and incubation services, addressing both security vulnerabilities and growth challenges for early-stage projects.
Scale indicators8 records
Recent moves6 records
Expansion highlights6 records
BlockSec competitors and assessment
Company assessmentDirect peers
- Zellic: Zellic is a security research firm specializing in smart contract audits for high-profile Web3 protocols, with strong formal verification and cryptography expertise. It is a direct competitor to BlockSec's audit practice, particularly for institutional clients.
- CertiK: CertiK is a leading blockchain security firm offering smart contract audits, formal verification, and real-time security monitoring (Skynet). It directly competes with BlockSec across audits, continuous monitoring, and KYC/AML services for Web3 protocols and enterprises.
- PeckShield: PeckShield is a blockchain security company providing smart contract auditing, on-chain threat monitoring, and incident response. It overlaps directly with BlockSec's audit and Phalcon Security capabilities, particularly in DeFi and exchange security.
- SlowMist: SlowMist is a blockchain security firm offering smart contract audits, threat intelligence (MistTrack), and AML compliance tooling — closely matching BlockSec's combination of auditing (audit side) and MetaSleuth-style on-chain forensics (compliance side).
- Quantstamp: Quantstamp provides smart contract security audits and continuous monitoring services for DeFi protocols and enterprises. It competes head-to-head with BlockSec's audit services and Phalcon Security offering.
- Hacken: Hacken is a blockchain security auditor offering smart contract audits, bug bounties, and CER.live rankings. It competes with BlockSec on the audit side and shares exposure to DeFi protocol and exchange customers.
- OpenZeppelin: OpenZeppelin provides smart contract security audits, secure contract libraries, and security tooling (Defender). It competes directly with BlockSec's audit services and shares overlap in serving DeFi protocols and infrastructure projects.
Broad incumbents
- Chainalysis: Chainalysis is the leading blockchain analytics and compliance platform used by governments, exchanges, and financial institutions for KYT/AML. It is a much larger, broader incumbent that overlaps with BlockSec's Phalcon Compliance and MetaSleuth offerings rather than its audit services.
- TRM Labs: TRM Labs provides blockchain intelligence and compliance tooling for crypto fraud detection, KYT, and investigations. It is a well-funded incumbent competing with BlockSec's Phalcon Compliance, particularly for exchange and payment provider customers.
- Elliptic: Elliptic offers blockchain analytics and compliance solutions for crypto wallets, exchanges, and financial institutions. It overlaps with BlockSec's Phalcon Compliance and MetaSleuth products on the AML/KYT and investigation side.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat6 records
Key risks6 records
Key highlights7 records
Customer concentration
BlockSec social profiles
Digital presenceBlockSec compliance and trust
Trust signalCompliance2 records
BlockSec financial estimates
Financial estimateRevenue estimate
Valuation estimate
BlockSec leadership team
Management profileNumber of profiles
Profiles1 record
BlockSec subsidiaries and ownership
Company hierarchySubsidiaries1 record
BlockSec funding detail
Funding detailFunding overview
Funding rounds2 records
Investors10 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
BlockSec M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about BlockSec
What does BlockSec do?
BlockSec provides end-to-end blockchain security and compliance infrastructure for Web3. The Phalcon platform offers real-time threat detection and automatic attack blocking for smart contracts, KYT/AML compliance screening across 400+ million labeled addresses, on-chain fund tracing, and smart contract/infrastructure security audits for DeFi protocols, centralized exchanges, L1/L2 chains, stablecoin issuers, and crypto payment providers.
Is BlockSec a public or private company?
BlockSec is a private company. It is classified as venture growth investor backed and is currently operating.
When was BlockSec founded?
BlockSec was founded in 2021. It employs 51 to 100 people.
Where is BlockSec based?
BlockSec is headquartered in Hong Kong, Hong Kong SAR China, in the Asia region.
How does BlockSec make money?
Four revenue lines are on record. Security Monitoring Subscriptions are the primary driver. The others are smart Contract Audits, phalcon Compliance Credit-Based Usage and API Access.
Who are BlockSec's main competitors?
Direct peers on record are Zellic, CertiK, PeckShield, SlowMist, Quantstamp, Hacken and OpenZeppelin. Broad incumbents are Chainalysis, TRM Labs and Elliptic.
Does BlockSec have an API?
Yes. BlockSec offers a Transaction Simulation API that allows developers to see outcomes and balance changes in USD before signing any on-chain transaction. Additionally, Phalcon Compliance provides KYA and KYT APIs built for crypto payment, CEX, and DEX integration. API documentation is available at docs.blocksec.tech. Developer documentation is at docs.blocksec.tech.
What industry is BlockSec in?
BlockSec's product category is Blockchain Security & Compliance Software. Its primary akta.pro industry code is FSAGAMAJ, Digital Asset Risk, Security & Audit Tooling (Smart Contract Audit, Threat Monitoring), with a secondary code of FSAPAJAK, Security Testing Tooling (SAST/DAST for smart contracts, fuzzing).