What Revoke.cash does

Revoke.cash is a free, open-source web3 security platform that helps cryptocurrency holders inspect and revoke token approvals they have previously granted to smart contracts. Operated by Kalis Software B.V., a Dutch private limited company headquartered in Amsterdam, the platform supports over 100 blockchain networks (including Ethereum, BNB Chain, Polygon, Arbitrum, Optimism, Avalanche, and Gnosis Chain) and provides four core tools: a Token Approval Checker (web), an Exploit Checker database of known compromised contracts, a Permit/Permit2 Signature Checker for cancelling off-chain EIP-2612 signatures, and a Marketplace Bulk Delister for cancelling all NFT marketplace listings in a single transaction. A Chrome browser extension adds real-time warnings when users are about to sign potentially harmful transactions. The technology stack is built on Viem (TypeScript Ethereum library), Wagmi (React hooks), and standard node infrastructure / explorer APIs (Alchemy, Infura, Etherscan, Envio, Blockscout, Goldrush), with threat intelligence supplied by ScamSniffer and Webacy. The platform is delivered entirely through a self-serve, web-based, and browser-extension model with no registration or user accounts.

The company operates a freemium public-good business model: all core features are provided at no cost to users, who pay only standard blockchain gas fees for on-chain revocations. There is no pricing tier, subscription, or transaction fee charged by Revoke.cash. Sustainability is achieved through non-dilutive public-goods funding, with the largest source being multiple rounds of Optimism's Retroactive Public Goods Funding (RetroPGF), supplemented by Octant, Gitcoin quadratic funding rounds, ENS, Boring Security sponsorship, and direct community donations via an on-chain donation address. Growth is community-led via organic word-of-mouth in web3, an active Discord community, Twitter/X presence, an educational blog, and the open-source GitHub repository. The primary customer segments are individual crypto users managing wallet hygiene (retail) and web3 developers / security-minded teams auditing wallet approvals.

Revoke.cash is a private company with 1–10 employees, no disclosed institutional venture investment, and no parent company. Its strategic positioning is differentiated by the breadth of multi-chain coverage, the breadth of the Exploit Checker catalog, and the trust associated with being an open-source, non-commercial actor in a market where paid security tools carry conflict-of-interest concerns.

Name

Revoke.cash

Legal name

Kalis Software B.V.

Website

https://revoke.cash

Company type

Private

Founded year

2019

Operating status

Operating

Headcount range

1–10 employees

Short description

Revoke.cash is a free, open-source web3 security tool operated by Kalis Software B.V. in Amsterdam that lets cryptocurrency users inspect and revoke token approvals across 100+ blockchain networks, complemented by a Chrome extension and an exploit-checker database.

Ownership category

akta.pro rank

Product category

Web3 Security Software

NAICS

Financial Transactions Processing, Reserve, and Clearinghouse Activities (52232)

SIC

Finance Services (6199)

akta.pro primary industry

Smart Contract Wallets & Account Abstraction (FSADACAF)

Keywords

• Token approval management
• Smart contract security
• Crypto wallet protection
• Blockchain phishing detection
• Web3 security tools

Headquarters

HQ city

Amsterdam

HQ country

Netherlands

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Software

Cost components

Technology or R&D, Infrastructure, Personnel, Operations

Revenue model

1. Free Public Good Model: Revoke.cash operates as a free public good with no revenue directly generated from users. The platform is provided at no cost to all crypto users. Sustainability is achieved entirely through external funding from grants, retroactive public goods funding, and community sponsorships rather than through any direct monetization of the user base.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels6 records

Core offering

Revoke.cash provides free, open-source tools that allow cryptocurrency users to inspect and revoke token approvals they have granted to smart contracts across 100+ blockchain networks. It also offers a Chrome browser extension that warns users before signing potentially harmful transactions, an Exploit Checker database for known hacked contracts, a Permit Signature Checker for off-chain signatures, and a Marketplace Bulk Delister for canceling NFT listings.

Product overview

Revoke.cash is a free, open-source web3 security platform operated by Kalis Software B.V. that helps cryptocurrency users manage and revoke token approvals across over 100 blockchain networks. The platform's core product is the Token Approval Checker, which is complemented by a browser extension for real-time phishing protection, an Exploit Checker for identifying approvals to hacked contracts, a Permit Signature Checker for managing offchain signatures, and a Marketplace Bulk Delister for canceling NFT listings. An educational Knowledgebase provides articles covering token approvals, security topics, wallets, and crypto basics. The platform is funded as a public good through RetroPGF grants (Optimism), Gitcoin rounds, Octant, and ENS, with infrastructure supported by data providers including Envio, Blockscout, Goldrush, ScamSniffer, Webacy, Alchemy, Infura, and Etherscan.

Differentiator

Problem solved

Functional benefit

Quantifiable outcome

• SushiSwap exploit (April 2023): $3.5M stolen from users with active approvals; Revoke.cash allows affected users to identify and revoke compromised approvals.
• +6 more outcomes

Segments2 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 capability1 record

Feature5 records

Partnerships

Six partnerships are on record, tiered core.

• EnviocoreTechnology or IntegrationEnvio is a modern blockchain indexing platform that provides fast, reliable access to on-chain data through custom indexing infrastructure. Envio supplies Revoke.cash with extensive historic data for many of the networks the platform supports.
• BlockscoutcoreTechnology or IntegrationBlockscout is an open-source blockchain explorer supporting multiple EVM-compatible networks with a focus on decentralization and openness. Blockscout provides historic blockchain data for many networks supported by Revoke.cash.
• ScamSniffercoreTechnology or IntegrationScamSniffer specializes in real-time phishing detection and maintains an extensive database of known malicious addresses, scam websites, and fraudulent contracts across blockchain networks. ScamSniffer provides Revoke.cash with real-time scam detection data for spender addresses in the approval checker.
• WebacycoreTechnology or IntegrationWebacy is a comprehensive web3 security platform providing risk assessment tools and threat intelligence for smart contracts and DeFi protocols. Webacy supplies Revoke.cash with real-time scam detection data for spender addresses.
• AlchemycoreTechnology or IntegrationAlchemy is a commercial blockchain infrastructure provider that Revoke.cash uses as a paid data source. Alchemy provides additional coverage and reliability across different blockchain networks beyond what free data partners offer.
• InfuracoreTechnology or IntegrationInfura is a commercial blockchain infrastructure provider used by Revoke.cash as a paid data source to access Ethereum and other blockchain networks reliably.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• ScamSniffer: Real-time phishing detection and malicious-address database across multiple chains. Comparable as a data source for identifying scam spenders (also a Revoke.cash data partner).
• Webacy: Web3 risk-assessment and wallet-threat-intelligence platform providing address and contract risk scoring. Comparable as a security-data provider (also a Revoke.cash data partner).
• Blockaid: Off-chain-based security platform offering transaction simulation, approval risk scoring, and threat detection for wallets. Closely comparable to Revoke.cash's exploit database and scam-address detection.
• Blowfish: Transaction simulation and phishing-detection API for wallets and dApps. Comparable as a front-end security layer that helps users identify malicious approvals and scam transactions before signing.
• Pocket Universe: Browser-extension and transaction-simulation tool that warns users before signing malicious transactions. Directly comparable as a wallet-security extension targeting the same retail web3 user need for pre-signing protection.
• Harpie: On-chain firewall and wallet-protection service that blocks malicious transactions and approvals. Comparable as a preventive wallet-security layer for retail crypto users.
• Wallet Guard: Browser-extension wallet-security tool focused on phishing detection and drainer prevention. Comparable as a wallet-side extension competing for the same end-user security niche.

Broad incumbents

• GoPlus Security: Broader web3 security infrastructure provider offering token-risk APIs, approval-risk detection, and phishing databases across many chains. Comparable as a multi-chain security data layer but operates at a wider scope than Revoke.cash's revocation focus.
• Stelo (now part of Fire / Google Chrome): Wallet-security browser extension for transaction warnings and scam protection, with Google Chrome distribution. Comparable as a wallet-security extension but with significantly larger distribution and corporate backing.
• SlowMist (MistTrack): Blockchain security firm offering auditing, threat intelligence, and on-chain tracking tools. Comparable as a broader web3-security infrastructure provider, with Revoke.cash's exploit database serving a similar reference role.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/RevokeCash
• GitHubgithub.com/RevokeCash/revoke.cash

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

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 Revoke.cash