Your Perimeter Tools Can’t Stop Stolen Credentials

Firewalls and EDR can’t stop attackers who already have valid usernames and passwords. By the time you notice unusual logins, the damage is done.

Breachsense surfaces leaked credentials before attackers use them. We monitor dark web sources that other platforms can’t access. When your employees’ passwords appear in stealer logs or leaked files from ransomware attacks, you’ll see them in your alerts.
Book a demo
Trusted by enterprise security teams
PwC Trustwave Teachers Mutual Bank Swire Shipping Defense.com

Search Leaked Breach Files for Your Data

When vendors get breached, your data ends up in the files attackers publish. Breachsense indexes the contents of those leaked files so you can search for your company name, employee names, or any string. We also scan infostealer channels for leaked credentials and crack hashed passwords to plaintext.

Use us for incident response, pen testing, vendor risk monitoring, or continuous breach monitoring.

Leaked Credentials

Session Tokens

Company Documents

Webhook & Email Alerts

How It Works

  • We index leaked files from ransomware attacks and let you full-text search across the contents. Search for your company name, employee names, or any string to find your data in vendor breaches.
  • We scan infostealer channels for leaked credentials and crack hashed passwords to plaintext. Find an infected employee? Pivot on their username to see every service they logged into.
  • Set up monitoring for your domains, IPs, or specific text strings. Get webhook or email alerts when your data appears.
  • Query our dark web API during incident response to search leaked files and pull complete breach history.
  • Push alerts into your SIEM or SOAR. Automate password resets. No manual file review required.
api.breachsense.com GET /stealer
$curl -H "lic: $BS_LIC" \
    "https://api.breachsense.com/stealer?s=example.com"
HTTP/1.1 206 Partial Content  ·  4.2s  ·  application/json
{
  "results": [
    { "usr": "k.becker@example.com", "pwd": "V••••••12", "mal": "Lumma", "src": "confluence.example.com", "fnd": "20260609" },
    { "usr": "t.nilsson@example.com", "pwd": "U••••••91", "mal": "RisePro", "ccn": "5188••••••••2470", "fnd": "20260605" },
    { "usr": "legal@example.com", "pwd": "C••••••53", "mal": "Atomic", "src": "salesforce.example.com", "fnd": "20260601" },
    { "usr": "m.ahmadi@example.com", "pwd": "G••••••48", "mal": "RedLine", "cwa": "0xBe3a17…cD8f49A", "fnd": "20260528" },
    { "usr": "ops@example.com", "pwd": "F••••••76", "mal": "MetaStealer", "ccn": "4716••••••••5103", "fnd": "20260524" },
    { "usr": "n.silva@example.com", "pwd": "B••••••29", "mal": "Vidar", "src": "gitlab.example.com", "fnd": "20260520" }
  ],
  "more": "850 more records · paginate via p=2"
}

What Makes Breachsense Different

Full-Text Search on Leaked Files

Search across the contents of files leaked from ransomware attacks. Find your company name, employee names, or any string in vendor breach dumps. Know exactly what was exposed without reviewing thousands of files.

Credentials From Stealer Logs

We pull credentials from infostealer channels and crack hashed passwords to plaintext. You’ll know exactly which accounts to reset before attackers weaponize them.

API-First for Security Teams

Query leaked files and credentials via API. Push results into your SIEM or SOAR. Automate password resets. Built for integration, not dashboard watching.

Who Uses Breachsense

Breachsense looks different depending on what you defend. Here's how four common teams use it day to day, and which capabilities matter most to each.

  • Incident Response

    IR teams during active investigations

    Pivot on usernames, passwords, and IP addresses to identify the initial access vector and scope of compromise when ransomware hits.

    What they use:
    Full-text leaked file searchstealer log pivotson-demand API
  • Enterprise SOC

    Security teams protecting workforce credentials

    Monitor leaked corporate credentials and session tokens so you can reset passwords before credential stuffing attacks succeed.

    What they use:
    Credential monitoringsession token detectionSIEM webhooks
  • MSSP / MSP

    Service providers monitoring multiple clients

    Detect vendor breaches that could expose client data and deliver third-party risk monitoring as a value-added service from a single API.

    What they use:
    Multi-tenant APIper-client alert routingMSP plans
  • Pen Test / Red Team

    Offensive security firms

    Query the API for valid credentials against in-scope target domains. Use the same data attackers already have to test defenses realistically.

    What they use:
    Full API accessplaintext password datapen test data

Essential Breach Detection Resources

Top 5 Dark Web Search Engines

Our #1 most-read guide with 14,800+ clicks. Learn how security professionals use dark web search engines to find leaked credentials and exposed data.

Dark Web Monitoring Platform

Comprehensive guide to dark web monitoring. Learn what sources we track, how real-time detection works, and why continuous monitoring prevents breaches.

Compromised Credential Monitoring

Detect leaked credentials in real-time across dark web markets and forums. Monitor for stolen passwords before attackers use them in credential stuffing attacks.

Dark Web Combo Lists Explained

Understand how attackers create and use combo lists for credential stuffing. Learn how to detect your credentials before they’re weaponized.

How to Find Data Breaches

Step-by-step guide to discovering data breaches affecting your organization. Learn detection methods and tools security teams use for early warning.

Third-Party Cyber Risk Management

Monitor vendor and supplier breaches for data related to your organization. Detect third-party exposures before they impact your business.

Dark Web API Documentation

Integrate dark web breach data into your security tools. API documentation for developers building automated threat detection and response workflows.

Equifax Data Breach Case Study

Detailed analysis of the 2017 Equifax breach affecting 147.9 million Americans. Learn what went wrong and how continuous monitoring could have detected the breach earlier.

Frequently Asked Questions

Breachsense monitors more sources than competing platforms, including private attacker channels and hacker forums other tools can’t access. We monitor continuously and deliver webhook or email alerts, not batch processing delays. Our platform provides data enrichment by cracking hashed passwords to plaintext and adding threat context. The dark web API offers flexible integration with any security tool, not just pre-built connectors.
Dark web monitoring lets you detect compromised credentials before attackers use them. You can reset passwords and revoke access before credential stuffing attacks succeed. It provides early warning when your data appears on criminal marketplaces or ransomware leak sites. Continuous monitoring prevents breaches instead of just responding after damage is done. You’ll also detect third-party vendor exposures that could impact your business.
Breachsense continuously scans dark web sources using automated crawlers and intelligence collection. When your credentials or data appear on a criminal marketplace or forum, our system indexes it and triggers an alert. You receive notifications via webhook or email so you can reset passwords and revoke access before attackers exploit the breach.
Yes. The average data breach costs $4.44 million according to IBM’s 2025 Cost of Data Breach Report. Dark web monitoring costs a fraction of that while preventing breaches before they happen. You’ll detect compromised credentials weeks or months before they become public knowledge. Early detection means you can act before attackers weaponize stolen data. For organizations handling customer data or facing compliance requirements, it’s essential.
Breachsense monitors criminal marketplaces where stolen credentials are sold, private attacker channels on Telegram and IRC, ransomware leak sites where victims’ data is published, and infostealer logs containing harvested credentials. We also track public breach dumps, paste sites, and code repositories. This coverage means you see threats other platforms miss.
Enterprise security teams use Breachsense to protect employees and customers from credential stuffing attacks. Managed service providers monitor multiple clients from a single platform. Penetration testers and red teams use our data to conduct realistic security assessments. Fortune 500 companies, MSSPs, and incident response teams rely on Breachsense for continuous dark web threat intelligence.

See What Attackers Already Know About You

Book a demo