Free access?
Yes. Free 'FREE' plan forever — 10 records per day without card binding.
Available immediately after registration in the web application or '/start' command in telegram bot.

Subscription for review?
Yes. Get premium subscription for free for a forum review.
Contact support @LeakZeroSupport — the process takes a few minutes.

Need to verify E-Mail?
No. Use any E-Mail: personal, temporary or even non-existent.
No confirmation emails — instant access after registration.

What do you store about me?
Minimum. We do not store IP addresses, User Agents, or other metadata.
Only what you provided yourself during registration (see previous point).

Data sources?
25,000+ verified sources: public breaches, stealer logs, partnership agreements
with cybersecurity companies. Constant expansion of the source base.

Data relevance?
Real-time updates. New breaches are added to the database within several hours after detection.
Automatic source monitoring 24/7.

How is it different from competitors?
Real data instead of locked preview. Flexible quota instead of strict daily limits.
AI correlation for identity linking. Visual constructor for complex queries.
Minimal search speed across 15+ billion records.

Use for pentesting?
Yes. The platform is actively used by red team specialists to verify credentials
within authorized penetration tests and security assessments of organizations.

Can it be used for OSINT?
Yes. Identity Linking automatically builds connection maps between accounts.
Perfect for OSINT investigations, threat intelligence and digital footprint analysis.

API availability?
Full-featured RESTful API with OpenAPI specification and Sandbox for testing.
Code examples in 10+ languages: Python, JavaScript, Go, Rust, Java, PHP, Ruby, C++, TypeScript, Dart.

Mobile access?
Telegram bot with almost full functionality of the web version.
All types of search, exports, subscription management — everything in messenger.

Supported interface languages?
7 languages: Russian, English, German, French, Spanish, Chinese, Arabic.
Automatic language detection by browser locale.

Ability to pause subscription?
Yes. Freeze subscription with preservation of unused quota.
Resume at any time without penalties and loss of funds.

Quota system — how does it work?
Clear model: total quota = daily limit × subscription period.
Use all quota at once during an incident or evenly — as convenient for you.

Google / Github OAuth?
Yes. Registration via Google or Github in 1 click.
Also supports classic registration via email/password.

Export limits?
2,000,000 rows per request in regular search.
20,000,000 rows when using multi-search (10 queries × 2M).

What export formats?
7 formats: TXT, CSV, JSON, XML, XLSX, PDF, HTML.
Configure export structure and field order for your needs.

Search speed?
Sub-second responses to most EM queries. Processing 15+ billion records
in fractions of a second thanks to distributed architecture and optimized indexes.

Can I delete my data?
Yes. Free data deletion procedure with identity verification.
Request processing 1-7 days. Complete and irreversible deletion.

Wildcard and regex support?
Yes. Full support for wildcard patterns (* and ?) and PCRE regex.
Perfect for searching by domains, IP ranges and complex patterns.

What is Advanced Search?
Visual constructor for complex queries without writing code.
Unlimited nesting, logical operators AND/OR/NOT, automatic query optimization.

What is Identity Linking?
AI algorithms for automatic building of connections between accounts.
One email → username → another email → shared password. Depth up to 5+ levels.

Support in Russian?
Yes. Support in Russian and English via Telegram and ticket system.
Response to critical incidents 15-30 minutes.

Is it legal?
Yes. We provide access to publicly available data for legitimate purposes:
cybersecurity, pentesting, OSINT, fraud protection. 
Responsibility for use is on the user.

Professional platform for breach data search
LeakZero — is a service providing access to structured data by your request.
25,000+ sources, 15+ billion records and advanced big data processing pipelines.


Input: enter URL / Login / Password / IP / OS Username / Hostname / Card / Name...
Get: All rows from our database for this query


You can use
Wildcard,
Regex, 
Exact Match


We have
Telegram Bot,
Website,
REST API


4 Types of search
Basic search,
Multi search,
Advanced search,
Identity linking


---> SUBSCRIPTION FOR REVIEW <---

Premium access in 5 minutes
Get full subscription for free for a platform review.
Simple process without complex conditions — from application to activation in 5 minutes.

How it works:
1. Contact support @LeakZeroSupport on Telegram
2. Get premium access to use the platform
3. Write a review on the forum (where you are now)
4. Get bonuses for a good review

Conditions:
• Minimum length — a few words about your impressions
• Any forums where LeakZero topic is present are suitable


---> GET SUBSCRIPTION <---

Parallel multi-search
Execution of up to 10 queries simultaneously with single search performance.
Convenient technology for mass verification of credentials and complex investigations.

Key features:
• Parallel processing — all queries execute simultaneously, not sequentially
• Individual limits — each query can have its own row limit (up to 2M per query)
• Single quota — quota consumption is summed across all queries, but execution is instant

Practical scenarios:
• Email list verification — upload 10 addresses and get results in seconds
• Infrastructure analysis — simultaneous verification of IP ranges and domains
• Credential stuffing audit — mass verification of credentials for pentest
• Incident response — quick verification of multiple IoCs during incident investigation
• OSINT investigations — parallel search by different target identifiers

Technical details:
• Maximum 10 queries in one multi-search
• Up to 2,000,000 rows per each query
• Total limit 20,000,000 rows at maximum configuration
• Single export — all files in one archive with separation by queries
• Speed — execution time slightly increases with number of queries

Usage example:
Query 1: *company[.]com (wildcard, 100K rows)
Query 2: 192.168.1.* (wildcard, 50K rows)
Query 3: admin@* (wildcard, 200K rows)
Query 4-10: specific *email* (wildcard, 10K rows each)
Result: all data in one execution, total quota consumption ~370K

Basic search
Platform foundation — fast and accurate search by any data field.
From simple emails to complex regex patterns — all in one interface.

Available search fields:
• URL — full addresses of compromised resources
• E-MAIL — email addresses with domain-based search
• USERNAME — user logins and nicknames
• PASSWORD — passwords in clear-text or hashed form
• PHONE NUMBER — phone numbers in various formats
• IPv4 — IP addresses for network forensics
• HOSTNAME — computer and server names
• OS USERNAME — local OS accounts
• NAME — full user names
• CARD — bank card data
• LOGIN — universal field for various identifiers
• DOMAIN — domain search (finds all URLs with this domain)

Search methods:
• Exact Match — exact match for known values. Maximum speed and accuracy
• Wildcard — flexible patterns with * and ? for mask search. Perfect for domains and ranges
• Regex — full power of regular expressions for complex patterns and validation

Practical application:
• Pentesting — verification of compromised organization credentials
• OSINT — gathering information about target through various identifiers
• Incident Response — quick IoC verification during incident investigation
• Threat Intelligence — monitoring breaches by key parameters
• Compliance — data exposure audit for regulatory requirements

Analysis of connections between records
One of the key tools of the platform — automatic building of connection maps between accounts.
One email → username → another email → shared password. The system finds chains itself.

How it works:
Algorithms analyze billions of connections between records, identifying patterns:
• Shared passwords between different accounts
• Similar usernames and name variations
• Related emails through domains and aliases
• Same IPs and infrastructure markers
• Temporal correlations — accounts created at the same time
• Behavioral patterns — similar user actions

Intelligent assessment:
Not all matches mean a real connection. The system uses a scoring model:
• High confidence (80-100%) — direct connections through unique data
• Medium confidence (60-80%) — multiple indirect matches
• Low confidence (40-60%) — weak correlations, require verification

Configurable depth:
• Depth 1-2 — direct connections, fast and accurate
• Depth 3-4 — extended networks, balance of speed and coverage
• Depth 5+ — complete mapping, maximum detail

Practical application:
• OSINT investigations — building complete target profile through connections
• Threat Intelligence — identifying threat actor infrastructure
• Incident Response — determining scope of compromise
• Executive Protection — mapping digital footprint of VIP persons
• Fraud Detection — detecting related fraudulent accounts

Connection types:
Domains[b] [/b]
Email variations
Infrastructure[b][b] [/b][/b]
Timestamps[b][b] [/b][/b]
Password patterns[b] [/b]
Names and nicknames
Behavioral patterns

Visual query constructor
Industry-first visual query builder for building most complex queries without SQL knowledge.
Drag-and-drop interface turns complex logic into intuitive visual blocks.

Revolutionary capabilities:
• Visual building — drag-and-drop elements instead of writing syntax
• Unlimited nesting — create complex condition hierarchies of any depth
• Logical operators — AND, OR, NOT with visual grouping
• Real-time preview — instant preview of query logic in natural language
• Auto-optimization — engine automatically rewrites queries for maximum speed

Comparison operators:
• Equals / Not Equals — exact match or exclusion
• Contains / Not Contains — substring search within value
• Starts With / Ends With — search by beginning or end of string
• Greater / Less Than — comparison of dates and numeric values
• Is Empty / Is Not Empty — checking for data presence in field
• Regular Expression — full PCRE regex support for complex patterns

Practical scenarios:
• Executive protection — (email contains "company[.]com" AND name contains "CEO") OR (username starts with "exec")
• Incident response — (email contains "target[.]com" AND breachdate > "2024-01-01") AND NOT (username contains "test")
• Threat intelligence — ((username contains "hacker" OR username contains "admin") AND password regex "^[A-Z]{2}[0-9]{4}$")
• Compliance audit — (email ends with ".gov" OR address contains "Government") AND (identitynumber is not empty)

Technical advantages:
• Query optimization — automatic reordering of conditions for speed
• Index utilization — smart use of database indexes
• Performance indicators — warnings about potentially slow queries
• Nested logic support — up to 10+ nesting levels without performance loss
• Natural language preview — clear description of query logic in human language

Complex query example:
AND Group (Root):
  ├─ email contains "company[.]com"
  └─ OR Group (Level 1):
      ├─ password is not empty
      └─ AND Group (Level 2):
          ├─ username starts with "admin"
          └─ breachdate > "2025-01-01"

Result:
⁡[srci]⁡all company records with passwords OR admin accounts after 2025[/srci]

Data structure and sources
Processing petabytes of data from 25,000+ sources while preserving full structure of each record.
Distributed NoSQL clusters and analytical databases for instant search across 15+ billion records.

Data fields in each record:
• URL — full addresses of compromised resources
• LOGIN — logins, nicknames, emails, user phone numbers
• PASSWORD — passwords in clear-text or hashed form
• NAME — full user names
• PHONE — phone numbers in various formats
• IPV4 ADDRESS — IP addresses for network forensics
• HOSTNAME — computer and server names
• OS USERNAME — local operating system accounts
• CARDS — bank card data (where available)
• COUNTRY — geographical binding
• BREACH DATE — compromise timestamps
• BREACH SOURCE — breach source name
• DATA SOURCE TYPE — source type (public leak, stealer log, combo list, etc.)

Data source types:
• Public Breaches — public breaches of major services and companies
• Stealer Logs — data from info-stealer malware (RedLine, Raccoon, Vidar, etc.)
• Combo Lists — compiled credential lists
• Database Dumps — database dumps from various sources
• Partner Feeds — partnership agreements with cybersecurity companies
• Dark Web Markets — monitoring darknet marketplaces
• Paste Sites — automatic collection from pastebin-like services

Processing and normalization:
• Deduplication — automatic removal of duplicates at record level
• Format normalization — bringing data to a single standard
• Validation — checking correctness of email, IP, phone and other fields
• Enrichment — adding metadata and context to records
• Indexing — building optimized indexes for fast search

Data quality:
• Source verification — checking breach authenticity before adding
• Noise filtering — removing test and fake data
• Timestamps — accurate compromise dating
• Confidence scoring =— data reliability assessment
• Regular updates — constant updating and expansion of the database

Professional data exports
From simple ULP TXT for credential stuffing to professional reports for compliance.
Flexible structure configuration, field filtering and automatic generation in 7 formats.

Supported formats:
• TXT — classic format for pentesting and credential stuffing
• CSV — tabular format for analysis in Excel, Google Sheets, pandas
• JSON — structured data for programmatic processing and API integrations
• XML — universal format for corporate systems and SIEM
• XLSX — Excel files with formatting for business reports
• PDF — professional reports for presentations and documentation
• HTML — interactive reports with search and filtering

Export configuration:
• Field selection — export only needed data (email, password, breach date, etc.)
• Column order — configure field sequence for your needs
• Delimiters — custom delimiters for TXT/CSV (colon, comma, tab)
• Filtering — export only records with filled passwords or other criteria
• Grouping — sorting by breach source, date or other parameters

Limits and performance:
• Basic search: up to 2,000,000 rows per export
• Multi-search: up to 20,000,000 rows (10 queries × 2M)
• Generation speed: ~500K rows per second for most formats
• File sizes: automatic compression for large exports

Usage examples:
• Pentesting: TXT for loading into Burp Suite, Hydra, Medusa
• Data analysis: CSV/JSON for processing in Python, R, Jupyter
• Reporting: PDF/XLSX for presentations to management
• SIEM integration: JSON/XML for loading into Splunk, ELK, QRadar
• Compliance: PDF reports with metadata for auditors

Professional technical support
Multi-channel support system with priority service for premium users.
Response to critical incidents 15-30 minutes, full support in Russian and English.

Support channels:
• Telegram Support — quick responses in real-time via @LeakZeroSupport
• Ticket system — detailed work on complex issues with correspondence history
• Email Support — traditional support for official requests
• Documentation — comprehensive knowledge base in Docs
• Community Forum — discussions with other users and the team

Support levels:
• Critical (P1) — platform unavailable, data loss → response 1-10 minutes
• High (P2) — serious functionality issues → response 10-30 minutes
• Medium (P3) — usage questions, bugs → response 30-60 minutes
• Low (P4) — general questions, feature requests → response 60-120 minutes

Premium support advantages:
• Priority queue — your requests are processed first
• Dedicated support — personal manager, available anytime
• SLA guarantees — guaranteed response time by contract
• External Support— Support in any convenient place for the client
• Custom training — team training on working with platform and data
• Integration help — assistance with integration into corporate systems

Self-service:
• Docs — complete documentation on all functions
• API examples — ready code examples in 10+ languages
• FAQ section — answers to frequently asked questions


---> @LeakZeroSupport (Telegram)
---> Open ticket (Web)
---> Knowledge base (Docs)

Transparent pricing. 
Pay for results, not for time

Free plan forever
10 records daily without time limits. Quota renewal every 24 hours.
Full testing of all platform features without card binding.

Paid plans from $5/week
Range — from 500 records for personal use to 3,500,000,000+ for those who consider compromise a solution.
Flexible use of entire quota at any time during subscription period — no daily limits.

Enterprise solutions
Individual terms for organizations with special requirements.
Personal support, guaranteed SLA, priority request processing.

Revolutionary quota system
Unlike competitors with strict daily limits, we give complete freedom:

Traditional approach:
100 records/day × 30 days = 3000 records
Problem: unused records expire every day

LeakZero approach:
100 records/day × 30 days = 3000 records
Advantage: use entire quota when needed — even in an hour

        [srci]⁡Total quota = Daily limit × Subscription period[/srci]   ⁡   

Practical example
Plan: 500 records/day for 30 days
• Total quota: 15,000 records for entire period
• Incident Response: spend all 15K in an hour during critical incident
• Regular monitoring: use 500 records daily
• Flexible schedule: 5K on Monday, 2K on Wednesday, rest on Friday
• Your choice: any convenient usage pattern

Subscription freeze
Need a pause? Freeze subscription with preservation of unused quota.
Resume at any time without penalties and loss of funds — quota stays with you.

Technology stack tested under load Modern distributed architecture for processing petabytes of data.
Optimized indexes and algorithms for fast search across 15+ billion records.

Architecture and infrastructure:
• Distributed storage system — data distributed across cluster for speed and reliability
• Microservice architecture — independent components for flexibility and scaling
• Asynchronous processing — efficient work with large data volumes
• Load balancing — even distribution of requests between servers
• Fault tolerance — automatic recovery on failures
• Continuous operation — updates without service downtime

Data processing and storage:
• Automated pipelines — processing new breaches in real-time
• Deduplication — smart duplicate removal at record level
• Normalization — bringing data from different sources to unified format
• Validation — multi-level data quality checking
• Indexing — optimized indexes for fast search
• Compression — efficient storage of large volumes

Search engine:
• Optimized indexes — specialized structures for different search types
• Caching — acceleration of repeated queries
• Parallel processing — simultaneous execution on multiple nodes
• Auto-optimization — smart reordering of conditions for speed
• Fast response — most EM queries processed in fractions of a second

Identity Linking algorithms:
• Data correlation — algorithms for linking records together
• Pattern recognition — automatic identification of patterns
• Scoring model — assessment of found connection reliability
• Graph algorithms — efficient traversal of connection networks
• High performance — processing millions of connections per second

Data sources:
• 25,000+ sources — verified breach sources
• 15+ billion records — constantly growing database
• Real-time updates — new breaches added within hours
• Partner integrations — collaboration with cybersecurity companies
• Stealer logs — processing data from info-stealer malware
• Dark web monitoring — automatic collection from shadow platforms
• Paste sites — monitoring pastebin-like services

Work from wherever convenient Three ways to access the platform — choose for your task and situation.

Web platform
Full arsenal of tools for serious work:
• All search types — Basic, multi, advanced, identity linking
• Visual constructor — complex queries without writing code
• Professional exports — 7 formats with structure configuration
• Subscription management — full control over account and quotas
• Query history — tracking and repeating previous searches

Telegram bot
All platform power in your pocket:
• All web version features — search, exports, identity linking
• Instant access — opened messenger and already working
• Convenient in the field — checks on the go without laptop
• Quick commands — intuitive interface for mobile
• Telegram security — end-to-end encryption of correspondence

RESTful API
For developers and automation:
• Full OpenAPI specification — documentation with all endpoints
• Examples in 10+ languages — TypeScript, Python, Go, Rust, Java, PHP, Ruby, C++, Dart, JavaScript
• Sandbox for testing — try API without quota consumption
• Key authentication — simple and secure integration
• Webhook support — receive event notifications
• Rate limits — transparent limits for load planning