What LEAKCHECK SECURITY SERVICES LTD does

LeakCheck Security Services, Ltd. operates a breach-credential search and monitoring service built on a proprietary aggregation engine that consolidates publicly available leak data, hacker-forum publications, and stealer logs into a single 7+ billion record database. The service exposes structured query capabilities (email, username, phone, password hash, keyword, and corporate domain origin) via a web UI at leakcheck.io and via two API tiers (a free Public API and a paid, authenticated Pro API v2), with an officially maintained Python SDK and CLI, and a Telegram bot (LeakCheck1_Bot) for in-app lookups and data-removal workflows. A privacy-preserving architecture — clients compute a truncated SHA256 hash of the searched identifier locally and the service does not retain query logs — is positioned as a core technical differentiator, alongside GDPR-aligned terms of service and data-deletion handling.

The commercial model is product-led and self-serve, with no traditional sales channel. Four subscription tiers cover consumer and enterprise demand: Basic at $2.99/day, Monthly at $9.99/mo, Lifetime at $69.99 one-time, and Enterprise from $179 per quarter with unlimited lookups, reverse password/domain search, bulk checking, and optional integration support. Customer segments are horizontal — security-conscious individual consumers, enterprise security teams monitoring corporate domains and user bases, and developers integrating breach data into security tooling — all acquired through SEO, Discord, Telegram, and documentation/word-of-mouth rather than outbound sales.

The company is privately held, UK-incorporated (Companies House number 12101959, registered address 2 Thomas More St, London, E1W 1WY), and has been operating since 2018. It discloses no outside funding, no headcount, no management team details, and no revenue figures; marketing is community-driven via Discord and Telegram, with documentation centralized through wiki.leakcheck.io.

Name

LEAKCHECK SECURITY SERVICES LTD

Legal name

LeakCheck Security Services, Ltd.

Website

https://leakcheck.io

Company type

Private

Founded year

2018

Operating status

Operating

Short description

LeakCheck Security Services, Ltd. operates a 7+ billion record breach-credential search and monitoring database, exposing email, username, password-hash, and corporate-domain lookups via web, API, Python SDK, and a Telegram bot to individual consumers, enterprise security teams, and developer users under tiered self-serve subscriptions.

Ownership category

akta.pro rank

Product category

Credential Breach Monitoring

NAICS

Security Systems Services (56162)

akta.pro primary industry

Credential Stuffing & Password Attack Protection (HDADALAC)

Keywords

• Credential breach monitoring
• Data leak lookup
• Exposed password search
• Breach database API
• Compromised credentials check

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Software

Cost components

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

Revenue model

1. Subscription Plans: LeakCheck generates revenue through tiered subscription plans with varying usage limits. Plans include Basic (daily payment, $2.99/day for 15 email lookups), Monthly ($9.99/month for 200 emails/usernames plus 15 keywords daily), Lifetime ($69.99 one-time for 400 emails/usernames plus 30 keywords daily), and Enterprise (from $179/quarter with unlimited lookups, reverse search capabilities, and bulk checking). All plans include API developer access.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels5 records

Core offering

LeakCheck operates a database-driven breach lookup service that aggregates more than 7 billion exposed credential records from publicly available breach sources, stealer logs, and hacker publications. Users can search for compromised emails, usernames, keywords, phone numbers, domains, and password hashes through a web interface, a Telegram bot, a free Public API, a paid Pro API v2, and an official Python SDK. Subscription plans (Basic, Monthly, Lifetime, and Enterprise) provide escalating lookup limits, with Enterprise adding bulk checking, reverse password/domain search, and dedicated integration support for corporate customers.

Product overview

LeakCheck is a credential breach monitoring and data leak lookup service operating as a unified platform with multiple API products, subscription tiers, and communication channel integrations. The core product is the leak search database (7+ billion records), accessible via the Public API (free), Pro API v2 (paid), and Python SDK. Users interact through the web interface, Telegram bot, or API integration. Subscription tiers (Basic, Monthly, Lifetime, Enterprise) provide escalating daily lookup limits and feature access, from basic email-only checks to enterprise-scale unlimited searches with bulk processing, domain monitoring, and dedicated support.

Differentiator

Problem solved

Functional benefit

Products and services

• LeakCheck Breach Lookup Service Web-accessible credential breach lookup service providing access to a proprietary database of more than 7 billion exposed records. Users can search by email, username, keyword, phone, domain, password, and hash to identify personal or organizational credential exposure, with optional new-entry notifications.
• Public API Free, unauthenticated REST API for basic leak lookups. Supports search by email, email hash, and username (minimum 3 characters). Limited to 1 request per second and does not return passwords or full breach data exposure details.
• Pro API v2 Paid, authenticated REST API with full breach data exposure. Supports search by email, username, phone, domain, keyword, password, hash, password hash (phash), and origin/stealer logs. Default 3 requests per second, upgradeable, with X-API-Key authentication and no IP linking.
• Python Wrapper / CLI Official Python SDK and command-line tool maintained by LeakCheck for programmatic access to both Public and Pro API v2 endpoints. Supports HTTP/SOCKS proxy configuration, customizable request limits and offsets, and integrates with terminal-based security workflows.
• Telegram Bot (LeakCheck1_Bot) Telegram bot providing direct access to the LeakCheck breach database for in-app lookups, account authentication, new-breach notifications, and personal data removal requests, available on Android, iOS, and desktop Telegram clients.

Quantifiable outcome

• Database of 7+ billion exposed records
• +1 more outcomes

Named customers1 record

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration8 records

AI capability2 records

Feature6 records

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Dehashed: Subscription-based credential breach search engine with API access and bulk lookup capabilities. Closely comparable to LeakCheck in product offering (search by email, username, password, phone), pricing model, and target audience of individual security researchers and enterprise teams.
• Have I Been Pwned (HIBP): Troy Hunt's breach notification service allowing users to check if their email or password has appeared in known data breaches. Directly comparable to LeakCheck's core email/credential lookup functionality, though HIBP typically hides passwords and is donation-supported rather than subscription-based.
• Constella Intelligence: Digital risk protection and identity intelligence platform that surfaces breached credentials and exposed personal data for enterprises. Comparable to LeakCheck's Enterprise tier for corporate credential monitoring, but with additional identity analytics and a sales-led enterprise GTM.
• Leak-Lookup: Long-running credential breach search service with subscription tiers, API access, and an aggregated leak database. Similar target audience and product positioning as LeakCheck, particularly for individual security-conscious users and small security teams.
• IntelligenceX: Search engine and data archive that indexes leaked databases, emails, and credentials from public sources. Overlaps with LeakCheck in breach data aggregation, search by email/domain, and tiered subscription API access for security researchers and journalists.
• SpyCloud: Enterprise-focused credential exposure and account takeover prevention platform with a large database of recaptured breach and stealer log data. Directly competes with LeakCheck's Enterprise tier for corporate security buyers, but targets large enterprises with a sales-led model.
• Hudson Rock: Cybercrime intelligence company specializing in infostealer-infected computer data, offering credential exposure lookup services. Overlaps with LeakCheck in stealer log search capability and corporate credential monitoring use cases.

Emerging players

• 1Password Watchtower: Built-in breach and password health monitoring feature within the 1Password password manager. Partial overlap with LeakCheck's credential exposure use case, but distributed as a feature inside a consumer/enterprise password manager rather than as a standalone service.

Broad incumbents

• Flashpoint: Threat intelligence and data breach monitoring vendor offering credential exposure alerts and dark web monitoring to enterprise customers. Comparable to LeakCheck's corporate domain monitoring use case but as part of a broader threat intelligence portfolio.
• Recorded Future: Large-scale threat intelligence platform that ingests breach data and dark web sources as part of its broader security offering. While not exclusively credential-focused, it competes with LeakCheck's Enterprise tier in providing breach-derived intelligence to enterprise security teams.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

Compliance2 records

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 LEAKCHECK SECURITY SERVICES LTD