Fidesium

What Fidesium does

Fidesium (Fidesium LTD, London, UK; founded 2023) is a Web3 smart contract security provider that combines expert manual audits with continuous automated monitoring for EVM, Solana, and multi-chain protocols. Its core technology is a proprietary scanner that performs AST parsing, full call graph extraction, and ML-assisted false positive reduction (a 62-feature XGBoost prototype reporting 71% false positive reduction while preserving 100% recall), with additional capabilities including cross-contract analysis, reentrancy detection validated against SmartBugs, a Solana fuzzing harness bridged via LiteSVM/CPI, and on-chain deployment scanning across 30+ EVM chains.

The company sells three integrated offerings: Manual Smart Contract Audits (one-time engagements from $5,000 with public report, badge, and NFT attestation), a Continuous Security Platform delivered as a self-serve subscription (Fid Basic $399/month, Fid Pro $799/month, Fid Enterprise $1,499+/month) with GitHub/GitLab CI/CD integration, PR-level vulnerability detection, and version-linked attestations, and Security Consulting (architecture review, post-incident response, compliance advisory). Bundle packages combine manual audit with 6 months of continuous monitoring at a 30% discount, and Enterprise Security tier adds SLA, dedicated auditor access, quarterly re-audits, and priority incident response.

Fidesium runs a hybrid go-to-market, combining a product-led self-serve free trial (scan first repo in 60 seconds) with direct sales engagement for enterprise protocols. Named customers are predominantly Web3 startups across DeFi, Web3 gaming, soulbound identity, and perps DEX verticals, with the longest-standing channel partner being PB&J Consulting. The company claims $250M+ in cumulative customer TVL secured and 110+ contracts audited, with a stated 67% cost reduction versus traditional audits. Headcount is 1–10 employees with one disclosed $150,000 funding round in April 2025 and no institutional investors identified.

Name

Fidesium

Legal name

Fidesium LTD

Website

https://fidesium.xyz

Company type

Private

Founded year

2023

Operating status

Operating

Headcount range

1–10 employees

Short description

Fidesium is a London-based Web3 security firm founded in 2023 that combines automated continuous smart contract scanning with expert manual audits for EVM, Solana, and multi-chain protocols, serving Web3 startups, DeFi teams, and dApp developers via subscription and audit engagements.

Ownership category

akta.pro rank

Product category

Smart Contract Security

NAICS

Other Scientific and Technical Consulting Services (54169)

SIC

Services-Prepackaged Software (7372), Finance Services (6199)

akta.pro primary industry

Smart Contract Auditing & Formal Verification (FSAPAJAA)

akta.pro secondary industries

Smart Contract Security Tooling (static/dynamic analysis, formal verification) (FSAPABAI), Security Testing Tooling (SAST/DAST for smart contracts, fuzzing) (FSAPAJAK)

Keywords

• Smart contract auditing
• Blockchain security platform
• Continuous security monitoring
• Web3 security services
• Decentralized finance audits

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

Personnel, Technology or R&D, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Subscription - Continuous Security Platform: Monthly or annual subscription for automated smart contract scanning and continuous security monitoring. Includes GitHub/GitLab integration, nightly vulnerability reports, and version-linked attestations. Tiered pricing from Basic ($399/month) to Enterprise ($1,499+/month).
2. Manual Smart Contract Audits: One-time fee for expert-led security review with detailed vulnerability reports and fix verification. Starting at $5,000 per engagement. Includes public audit report, badge, and NFT. Manual review add-on available for subscription tiers (3,000-4,000 lines of code per review).
3. Security Consulting: Custom engagement services including pre-launch security roadmaps, architecture review, post-incident response, and compliance advisory. Available as standalone service or bundled with audits.
4. Bundle Packages: Bundled manual audit + 6 months continuous monitoring at 30% off, offering land-and-expand upsell opportunity from automated to manual services.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels6 records

Core offering

Fidesium provides expert-led manual smart contract audits combined with a continuous automated security scanning platform for Web3 protocols, DeFi projects, and blockchain teams. Offerings include EVM, Solana, and multi-chain security audits, GitHub/GitLab CI/CD-integrated automated scanning with nightly vulnerability reports, version-linked attestations, and security consulting services. Pricing ranges from $399/month for automated subscription scanning to $5,000+ for professional manual audits, with bundle packages combining manual audits and continuous monitoring.

Product overview

Fidesium is a Web3 smart contract security platform offering a hybrid approach combining automated continuous security scanning with expert manual audits. The core platform consists of three integrated offerings: Manual Smart Contract Audits (expert-led security reviews for EVM, Solana, and multi-chain), the Continuous Security Platform (automated scanning with GitHub/GitLab CI/CD integration and nightly scans), and Security Consulting (advisory services for architecture review and compliance). These are delivered through tiered subscription plans (Fid Basic, Fid Pro, Fid Enterprise) and modular audit packages (Essential Scan, Professional Audit, Enterprise Security). Recent Q1 2026 updates added on-chain deployment scanning for 30+ EVM chains and a Solana fuzzing harness. The platform uses static analysis, AST parsing, ML-powered false positive reduction (XGBoost), and automated nightly rescans to provide version-linked security attestations.

Differentiator

Problem solved

Functional benefit

Products and services

• Manual Smart Contract Audits Expert-led security review of smart contracts supporting EVM, Solana, and multi-chain architectures. Delivered by competition-winning security auditors, the engagement includes detailed vulnerability reports, fix verification, and a public audit report accompanied by a badge and NFT attestation. Starting price of $5,000 per engagement.
• Continuous Security Platform

Quantifiable outcome

• 67% lower cost than traditional audits
• +7 more outcomes

Named customers9 records

Segments3 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

AI capability8 records

Feature11 records

Scale indicators9 records

Recent moves6 records

Expansion highlights6 records

Emerging players

• Zellic: Fast-growing smart contract security firm with audit and continuous security services across EVM, Solana, Move, and other ecosystems. Closely comparable in product mix and target customer profile, though typically better capitalized.
• Cyfrin: Smart contract security firm (formerly Sherlock) offering audits and the Aderyn static analyzer. Closely comparable continuous security tooling play and audit services for EVM protocols, with open-source distribution.

Direct peers

• Trail of Bits: Premier security firm with deep smart contract audit practice across EVM and Solana, plus proprietary static analysis tooling (Slither). Competes directly for high-end audit engagements and offers consulting adjacent to Fidesium's services.
• Hacken: Web3 security firm offering smart contract audits and continuous monitoring (Extractor) plus broader tokenomics and due diligence services. Comparable continuous monitoring offering and audit pricing tiering.
• Spearbit: Researcher collective model that connects protocols with senior auditors for manual audits and continuous security reviews. Competes for the same high-end manual audit and retainer engagements as Fidesium's Professional Audit and Enterprise Security tiers.
• OpenZeppelin: Largest independent smart contract security firm, offering manual audits, security tooling, and Defender monitoring for EVM and multi-chain protocols. Directly comparable to Fidesium on EVM audit services and continuous security offerings, with much greater scale and brand recognition.
• Certik: One of the largest smart contract audit firms by volume, with a Skynet continuous monitoring product and a broad Web3 security suite. Directly comparable continuous monitoring offering and audit pricing model.
• Code4rena: Audit competition platform that runs crowdsourced smart contract security reviews. Competes for protocol security budgets with a different delivery model (competition-based) but serves the same Web3 protocol customer base as Fidesium.
• Quantstamp: Established smart contract audit firm with both manual audits and automated security tooling. Comparable on audit services and continuous monitoring, with a longer track record and broader enterprise customer footprint.

Broad incumbents

• Consensys Diligence: Audit arm of Consensys (builder of MetaMask/Infura), offering smart contract audits and MythX automated security analysis. Competes for EVM audits as part of a much broader Web3 platform portfolio.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/fidesiumapp
• LinkedInlinkedin.com/company/fidesium

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds1 record

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Fidesium