Data Breach & Dark Web Monitoring Find leaked credentials in minutes, not months.

The API that finds your leaked credentials, session tokens, and company data across the dark web.

58,408,084,829
Leaked credentials indexed
26,144
Ransomware victims tracked
Dark Web Exposure Scanner
See if your data is on the dark web.
Find out how many of your employees and customers have been compromised.
Example output for ████████.com
247 employees exposed·1,452 customers affected
Trusted by enterprise security teams
PwC Trustwave Teachers Mutual Bank Swire Shipping Defense.com

Your data is already on the dark web.

US data compromises
3,332+

reported breaches in 2025, a record year again.

ITRC · 2025
Mean time to detect
241

days the average enterprise takes to discover a breach on its own.

IBM Cost of a Breach · 2025
Cost per incident
$10.22M

Catch it in under 200 days and save $1.1M.

IBM Cost of a Breach · 2025

Built for data breach detection.

We monitor dark web marketplaces, hacker forums, and infostealer log channels around the clock. When your data shows up in a breach, you'll know within minutes.

Find leaked credentials, session tokens, exposed PII, and ransomware dumps tied to your company. Continuous data breach monitoring catches exposures other security tools never see.

Plug our REST API into your existing security stack to automate password resets and incident response workflows.

Enterprise security teams and MSPs use Breachsense to find leaked credentials before attackers can use them. Because the platform is API-first, alerts flow directly into your existing SIEM or SOAR. No dashboard to babysit, no extra tool your team has to check daily.

When ransomware groups leak files from your vendors, you can search the contents for your company name, employee details, or specific keywords. You'll know what's exposed before the vendor's disclosure email goes out. See our collection methodology for source-by-source detail.

10 API endpoints.
One integration.

Every data type has its own dedicated endpoint. Stolen credentials, session tokens, machine identities, dark web data, and attack surface management. Query what you need. Get clean JSON back.

Push alerts into your existing security stack: SIEM, SOAR, ticketing systems, or password reset workflows. Set up in hours, not months. Or query from your terminal with the Claude Code plugin.

Every record shows where the data was found and when. No black-box matches.

See the documentation for details.

api.breachsense.com GET /stealer
$curl -H "lic: $BS_LIC" \
    "https://api.breachsense.com/stealer?s=example.com"
HTTP/1.1 206 Partial Content  ·  3.4s  ·  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" }
  ],
  "more": "1243 more records · paginate via p=2"
}

Stop attacks before they hit your network.

Catch breaches early

Find leaked credentials hours after they appear in infostealer logs. Reset passwords before attackers use them to log in.

See third-party exposure

Watch ransomware leak sites and Russian-language hacker forums for your stolen data. When a vendor breach exposes you, you'll know as soon as the data is leaked.

Automate your response

REST API with webhook and email alerts. Push alerts into your SIEM or trigger password resets the moment a credential appears.

Breachsense is perfect for

Security Operations
Monitor credentials and session tokens across every domain you defend.
Incident Response
Pivot from one compromised account to every related exposure fast.
Managed Security Providers
Multi-tenant exposure data for every customer domain you protect.
Security Vendors
Embed breach intelligence into your platform via our public API.
Penetration Testers
Surface valid credentials for initial access on red team engagements.

Frequently Asked Questions

Breachsense is a dark web monitoring platform that watches hacker forums, ransomware leak sites, and infostealer logs for your stolen credentials and company data. You’re alerted the moment something tied to your organization appears, so you can reset passwords and cut off access before attackers exploit them. It’s an API-first solution built for security teams. Here’s how it works.
Breachsense sends alerts by webhook (JSON) or HTML email the moment your data shows up in a new breach or infostealer log. You can pipe those alerts straight into your SIEM or SOAR to automate response. There’s no dashboard to log into and babysit.
Yes. Breachsense is API-first, so you can query leaked credentials and breach data directly or automatically send alerts into your own tools. Most teams connect it to their SIEM or SOAR to automate response. See the API overview and documentation.
Pricing scales with the size of your organization and what you need to monitor. You can see current plans and book a demo on the pricing page.
Yes. Run a free dark web scan to see if your credentials or company data have leaked. It checks your email or domain against breached data and infostealer logs. The full dark web monitoring platform returns the details including plaintext passwords and screenshots.
Yes. Security teams, MSSPs, and enterprises use Breachsense to monitor their dark web exposure, and our breach data gets cited in security media. You can also run a free dark web scan to see what’s already exposed for your domain.
Yes. Breachsense monitors ransomware leak sites and publishes a monthly ransomware report on general trends, which groups are most active and which industries they hit. If a ransomware group leaks your data, you’re alerted as soon as it appears.
Breachsense monitors infostealer logs for session cookies and NHI (non-human identities) tokens published by malware like RedLine and Lumma. When an attacker replays a leaked session token, MFA doesn’t trigger. The system thinks the user already authenticated. Catching the token before it’s used lets your team invalidate the session before the attack.
Breachsense watches 100+ ransomware leak sites and Russian-language hacker forums for stolen data from your vendors and partners. When a vendor gets breached and your data leaks as part of their breach, you get notified, often before the vendor’s disclosure. That’s often weeks before the breach goes public.