For US law offices, accounting firms and medical practices
The AI only ever gets [PERSON_1]. You still see your client.
Start today with Free: no account, no credit card, set up in a minute
Works with ChatGPT, Claude, Copilot and any other AI tool.
Wherever your team uses AI, client data stays out of it: in any app, in Chrome and Safari, in your files and on ID copies.
At the center, a sample sentence shows its client details replaced by placeholders. Around it sit four cards: Any app, one key; Chrome and Safari; Files you upload; and ID documents.
Highlight text in Outlook, Word or Slack, press your key, and client details turn into [PERSON_1].
How the key works →Word, Excel, PDF and more: client details come out of the file before any AI gets to read it.
Paired with the Nonimo app on Mac or Windows, it redacts what you paste into ChatGPT, Claude and Gemini.
Get the extension →Black out the fields you pick on a passport or driver's license, then stamp it with its purpose and date.
Redacting IDs →Nonimo trained its own model to spot client details even when nothing flags them: a first name on its own, a business mentioned mid-sentence.
Meet the model →When your company’s apps call an AI model through the API, Nonimo Gateway swaps out client details on your own servers before each request leaves.
See the Gateway →[nonimo]
Email · Outlook
Your original
Mr. Kyle Brennavorth signed the lease. Call him at (312) 555-0164 before Friday.
Sent to the AI
Mr. [PERSON_1] signed the lease. Call him at [PHONE_1] before Friday.
clients.xlsx · row 14
Your original
Client: Renee Okalvander · Email: renee.okalvander@example.com · Ref.: INV-2026-0417
Sent to the AI
Client: [PERSON_1] · Email: [EMAIL_1] · Ref.: [REFERENCE_1]
Nonimo’s own model
Your original
Got a voicemail from Dana Pellacourt about the Quillmont Orthodontics invoice; I still owe her a call.
Sent to the AI
Got a voicemail from [PERSON_1] about the [COMPANY_1] invoice; I still owe her a call.
Nonimo Gateway
Your original
Draft a reply to Trevor Ashgrove at t.ashgrove@example.com about his billing dispute.
Sent to the AI
Draft a reply to [PERSON_1] at [EMAIL_1] about his billing dispute.
Passport · photo page
The AI never sees your dataReversibleNo cloud involved
Our own model
It takes in each sentence like a careful reader would, so client names, numbers and other sensitive details get flagged while they’re still on your desk.
Attaching the engagement letter for Marcus Delvecourt at Ostrander Pell Logistics. His SSN, 987-65-4324, is on page two.
Attaching the engagement letter for [PERSON_1] at [COMPANY_1]. His SSN, [SSN_1], is on page two.
No off-the-shelf AI with a fresh logo slapped on. Our team built and trained it in-house, and it does exactly one thing.
It knows a word is a person or a business even with no “Mr.” in front of it and no “Inc.” after it.
It runs on your own computer, so the text you work on never passes through Nonimo’s servers.
Five sample files: your original on the left, what reaches the AI on the right.
See what happens to five sample files from US offices. Press one key and, in about a second, Nonimo replaces ITINs, A-Numbers, VINs, MRNs and client names on your own computer before ChatGPT, Claude or Copilot reads them, then restores the originals in the reply.
Catches US identifiers such as SSNs, ITINs and MRNs, plus personal names.
Highlight a patient intake form or a client memo, hit your Nonimo key, and Social Security numbers, ITINs and medical record numbers reach ChatGPT, Claude or Copilot as placeholders. The answer comes back with the originals restored, all on your own computer.
| US identifier | Typical document | Shown to the AI as |
|---|---|---|
| Social Security number | Intake forms, W-2s, tax returns | [SSN_1] |
| ITIN | Tax returns, W-7 paperwork | [ITIN_1] |
| Medical record number (MRN) | Referrals, chart notes, claims | [MRN_1] |
| Medicare Beneficiary Identifier (MBI) | Medicare cards, patient intake, claims | [MBI_1] |
| Health plan member ID | Insurance cards, eligibility checks, EOBs | [HEALTH_PLAN_MEMBER_ID_1] |
| EIN | W-9s, payroll filings, business returns | [EIN_1] |
| Bank account number | Direct deposit forms, voided checks, wire instructions | [BANK_ACCOUNT_US_1] |
| A-Number (Alien Registration Number) | Green cards, EADs, USCIS notices | [A_NUMBER_1] |
| USCIS receipt number | I-797 notices, case status checks | [USCIS_RECEIPT_1] |
| Driver's license number | Intake notes, accident reports | [REFERENCE_1] |
| Vehicle identification number (VIN) | Vehicle titles, bills of sale, insurance claims | [VIN_1] |
| Federal court case number | Pleading captions, PACER dockets, court orders | [FEDERAL_CASE_NUMBER_1] |
Nothing leaves the computer you're typing on until the identifiers are swapped, and the reply shows the actual values again. Dates of birth, phone numbers, emails, card numbers, passports and personal names get the same treatment.
A landlord, a bank or a new employer wants a copy of your driver's license, passport or Green Card? Nonimo covers the fields they have no use for, right on your computer, and the original never gets uploaded.
Click or tap any black bar to reveal the value
Sometimes every detail has to stay, like the ID copy an employer keeps with your Form I-9. Nonimo then stamps the copy with its purpose and the month, so it's useless for anything else.
For teams
Your IT folks push it to every workstation in one go, and leadership gets a signed tally of what got masked, broken down by type.
IT installs it on every Chrome browser at your firm from the admin console they already use. Nobody has to remember to switch it on.
Right on your computer, the app tallies how many items of each type it has redacted. You download a PDF signed by Nonimo for any date range you choose.
The desktop app runs on Mac and Windows. The Chrome extension installs through enterprise policy, so your IT team or managed service provider can push it to every workstation from the console they already run.
Each computer can export a digitally signed usage report: a count of the names, ID numbers, bank account numbers and street addresses masked during whatever window you pick, without ever holding on to the text or the details themselves. Whoever receives it can confirm at nonimo.ai that Nonimo issued it and that nobody has altered it.
For in-house applications that call an AI model through the API, there is Nonimo Gateway, which you install on your own servers.
HIPAA, the FTC Safeguards Rule, state privacy law: identifiers come out before any prompt goes to the AI.
The US has no single privacy statute. Patient records fall under HIPAA, tax preparers under the FTC Safeguards Rule and lawyers under their state bar's rules, with state privacy laws layered on top. Nonimo removes identifiers on your computer, so the prompt goes out with placeholders and the answer comes back complete.
HIPAA
Under 45 CFR 164.502(e), protected health information may go to a vendor only once a business associate agreement is in place. The big AI providers don't sign one for consumer plans, and HHS doesn't certify any product as HIPAA compliant.
Safe harbor
The safe harbor route to de-identification means stripping every one of the eighteen listed categories, and having no actual knowledge that the remaining data could identify the patient.
Model Rule 1.6
A lawyer's duty of confidentiality covers all information relating to the representation. ABA Formal Opinion 512 (July 29, 2024) applies it to generative AI and calls for informed client consent before such information goes into a self-learning tool.
FTC Safeguards Rule
Under 16 CFR Part 314, a firm that prepares income tax returns counts as a financial institution, and its duty to protect customer information extends to every service provider that handles it.
Removing identifiers before you paste is the hands-on part of meeting those duties. Nonimo handles it on your computer with a single keystroke, so the AI only ever works with placeholders. It complements, and doesn't replace, the BAA, the client consent and the vendor terms those rules call for. For the HIPAA view of each tool, see which AI tools a covered entity can use.
General information, not legal advice. State rules apply on top of these: ethics opinions from your bar and your state's data breach notification statute.
[EMAIL_1] [PERSON_1] [PHONE_1] [ADDRESS_1] [BIRTH_DATE_1] [CARD_1] Pick your field to see the IDs that show up in its documents, what Nonimo hides before an AI tool sees them, and the reason for each.
Straight answers about HIPAA, privilege, what stays on your machine and pricing.
Nonimo is a Mac and Windows desktop app that removes client details from your text. It does this on your computer, so ChatGPT, Claude and other AI tools never see them. The real details come back when you copy the AI's answer.
Nonimo replaces client details with labels such as [PERSON_1] before your text reaches an AI, and restores them when you copy the reply. It works in any app, through its Chrome and Safari extension, on Word, Excel and PDF files, and on ID documents.
You can use Nonimo in any app on a Mac or Windows PC: highlight text and press one key. Its Chrome and Safari extension redacts what you paste into ChatGPT, Claude and Gemini. Nonimo also redacts Word, Excel and PDF files before upload.
No, your text never reaches Nonimo. Redaction runs on your own computer, and our security page has the details.
Strictly speaking, what Nonimo does is pseudonymization. Names, NPIs and other identifiers become placeholders on your computer, and the AI's reply shows the real details again, which true anonymization wouldn't allow.
No software is HIPAA compliant by itself, and HHS doesn't certify products. Compliance depends on how a covered entity uses its tools. Nonimo cuts the identifiers that ever reach an AI vendor and works alongside your BAA.
Removing client names doesn't protect privilege on its own. Whether privilege holds turns on who received the communication and under what circumstances. Fewer identifiers means less exposure, but it can't undo a disclosure.
Yes, the Nonimo extension runs in ChatGPT, Claude and Gemini. It works with the desktop app on your Mac or Windows PC. For Chrome, get it from the Chrome Web Store; for Safari, it comes bundled with the Mac app.
Use Nonimo's online ID redaction tool, which blacks out the fields you pick on your driver's license and adds a watermark. Start from a photo or scanned PDF; the tool runs in your browser, so your ID is never uploaded to a server.
Nonimo's Free plan lets you redact as many as 100,000 words each month. Personal and Team lift that limit for US$13.90 per month or US$139 per year, and Team charges that same price for each member.