Advanced detection
Cards (with brand), Aadhaar, PAN, IFSC, UPI, IBAN, SSN, account numbers, CVV/expiry, OTPs and passwords, API keys, crypto wallets, email, phone, DOB — validated by checksums to cut false alarms.
THE GUARDIAN FOR YOUR MONEY DATA
AI can help with money. Custos keeps the sensitive parts yours.
Custos detects cards, IDs, UPI handles, credentials, balances and spending clues locally, then lets you block, redact, intelligently generalize or knowingly allow — with a tamper-evident record of each choice.
No account. No cloud inspection. Your text stays in your browser.
LOCAL-FIRSTAnalysis in your browser
CHECKSUM-AWARELuhn · Verhoeff · IBAN mod-97
RISK-SCORED0–100 with a suggested action
TRACEABLEHash-chained local log
PRIVACY BEFORE PROMPT
Useful AI. Less exposure.
Custos reduces accidental disclosure without pretending every sensitive detail can be perfectly identified.
Intelligent generalization
“I spent ₹42,000 at Titan” becomes “I spent a mid-sized amount at a jewelry & watch retailer.” Income and balances are withheld; identifiers get consistent placeholders so the AI can still follow your story.
Risk score and control
See a live 0–100 score, highlighted matches, and untick false positives before deciding. Custos suggests the safest sensible action.
Verifiable local log
Only categories, score and decision are recorded — never your text. SHA-256 hash chain, one-click integrity check, JSON export.
Insight dashboard
Weekly activity, average risk, and the categories you expose most often.
Installable PWA
Works offline on desktop and mobile with dark-mode support.
FOUR SIMPLE STEPS
Nothing leaves without a decision.
01
Paste or compose
Review text before using an AI money assistant.
02
Scan locally
Patterns, checksums and context are checked on-device.
03
Choose
Block, redact, generalize or allow with consent.
04
Copy safe text
Review the result, then decide where to send it.
Try it with the built-in sample
Synthetic data only — nothing is sent to a server.
CUSTOS GUARD · CHROMIUM EXTENSION
A stronger guard at the send button.
The v2 extension intercepts Enter and form submits in prompt boxes, shows a risk-scored review panel, and lets you redact, generalize, cancel or send anyway — using the same engine as the dashboard.
Not a bank connection
Custos never connects to accounts or retrieves transactions.
Not a universal firewall
It can’t see other apps, iframes, or custom network calls. It is a best-effort guard.
Not a guarantee
Detection is heuristic. Always review proposed output before sharing.