Privacy by design

Test your privacy policy against your product

Send the policy you already published and the questionnaire you were sent. We will show you where your running product disagrees with them.

Start with the document that is blocking you

Two good outcomes. A scoping conversation, or a straight answer that you do not need this yet.

How we handle what you send is set out in our privacy notice.

Refuse AllFrance's data protection authority sent inspectors to a large online fashion retailer and clicked Refuse All. Consent-requiring cookies were written anyway, and the ones already there kept being read.

CNIL restricted committee, decision SAN-2025-005, 1 September 2025, under Article 82 of the French Data Protection Act.

EUR 150,000,000The fine that followed. The finding matters more: the refusal mechanism was defective on the day of the inspection.

CNIL, SAN-2025-005, 1 September 2025.

One afternoonHow long the same test takes on your own site.

Method, not a measured outcome.

*Disclaimer: Article 82 binds anyone placing cookies on devices in France. A regulator's finding about another company, not our result, and not legal advice.

Two situations bring people here

Permission and withdrawal are separate

  1. Load with no history

    Getting permission to collect

    Almost every team has already built this. The banner with its toggle and its stored flag, shipped in the fortnight before launch and rarely opened again afterwards.

  2. Accept, withdraw, then look

    Honouring the withdrawal

    Almost nobody builds this. It is every system that already received the data hearing that permission ended: analytics tags, ad platforms, warehouses, and the vendor you told six months ago.

  3. CNIL decision SAN-2025-005

    This is not our opinion

    France's data protection authority held in September 2025 that these are two separate obligations, binding controllers handling people in France. We are software engineers rather than a law firm, and this is not legal advice.

Show data table
Rejecting the banner was ignored on 80.74 to 88.41 percent of the 1,793 banner-bearing websites measured in October 2024, out of 10,436 scanned from the global top 20,000, in all eight jurisdictions studied.
Item Value
California 88.41%
Ireland 86.09%
United Kingdom 84.75%
Michigan 84.65%
Singapore 82.22%
South Africa 81.97%
Canada 81.63%
Australia 80.74%

If your reject button is ignored you are in the majority, and that is a reason to budget for it rather than relax.

Sites that placed a consent-requiring cookie after reject was clicked Rejecting the banner was ignored on 80.74 to 88.41 percent of the 1,793 banner-bearing websites measured in October 2024, out of 10,436 scanned from the global top 20,000, in all eight jurisdictions studied. Tang, Bui and Shin, ConsentChk, published 2025. An academic measurement of other companies' websites, not our result.
Show data table
Four ways the way out failed, each measured on the same population of the top 200 websites in 2024. They are separate failures, so one site can carry several.
Item Value
Cookies not deleted after consent was revoked 57.5%
More effort to revoke than to accept 20.5%
Revocation hard to reach 19.87%
No way to revoke at all 2.48%

In a separate group of 281 sites running the IAB Europe Transparency and Consent Framework in the same study, 22 stored a positive consent string after consent was revoked, and on 101 the third parties told about the acceptance were never told about the revocation. That is the failure that reaches furthest, because it happens in systems you do not own.

Share of the top 200 websites, 2024 Four ways the way out failed, each measured on the same population of the top 200 websites in 2024. They are separate failures, so one site can carry several. Kancherla, Bielova, Santos and Bichhawat, 2024, top-200 websites. An academic measurement of other companies' sites, not our result, read from the authors' abstract rather than the full method section.
54.5%of 600 European-market Android apps promised in their privacy policy that a user could get a copy of their data. Measured 2024.

Li and colleagues, RADS-Checker, October 2024.

17%of 200 of those apps actually delivered a copy when researchers asked as ordinary users.

Same study, 2024, on 200 top-ranked apps from the same market.

1 of 34copies that did arrive was complete against what the app was seen collecting. Thirty of the thirty-four were missing more than 40 percent of it.

Same study, 2024, on the 34 copies that arrived.

*Disclaimer: An audit of other companies' apps, not our result. This is what a published policy is worth until someone tests it.

Where personal data was found when two European regulators went looking
The caseWhat was foundWhere the data was livingWhat to check yourself
Italy's data protection authority, the Garante, order doc. web 9256486, fine EUR 27,802,946Customer data belonging to other operators still held past the ten-year limit, and opt-out lists that never propagated into the company information systemsThe CRM, and the lists downstream of itThe system your sales and support teams work in, and every list built from it
Spain's data protection agency, the AEPD, PS/00140/2020, fine EUR 5,000,000 under Article 17 of the GDPRPassing personal data from content-removal requests to an outside project meant the erasure was not honoured, with what the decision called grave deficiencies in the processA recipient outside the company that had already been sent the dataEvery third party you send data to, and whether any of them hears that a deletion happened

None of it was on the policy page. Each binds controllers in that regulator's own country. Both are published findings about other companies rather than our results, and none of it is legal advice.

Three legislatures, three continents, the same three system requirements

We are software engineers rather than a law firm, and nothing here is legal advice. Take the legal reading from your own counsel.

Three privacy regimes against three system requirements
What the system has to doGDPRthe EU and EEAThe Digital Personal Data Protection Act 2023India, staged commencementThe CCPA as amended by the CPRACalifornia residents only
Withdrawal as easy as consentArticle 7(3)Sections 6(4) to 6(6)1798.135(a) and (b), including an opt-out signal sent by the browser
Deletion reaches every recipientArticles 17(2) and 19Section 8(7), passing the obligation to your processors1798.105(c)(1)
Stated purpose and retention clockArticle 5(1)(e)Section 8(7) retention1798.100(a)(3) and (c), per category

We engineer for GDPR, HIPAA and SOC 2. The Indian and Californian instruments appear here as facts about the category, and nobody certifies anyone here. The GDPR was adopted by the European Parliament and the Council, and binds controllers and processors handling the personal data of people in the EU and EEA. The Digital Personal Data Protection Act 2023 was enacted by the Parliament of India and published in The Gazette of India Extraordinary on 11 August 2023, with commencement staged by government notification, binding data fiduciaries handling digital personal data in India. The CCPA as amended by the CPRA comes from the California Legislature and Proposition 24, and binds qualifying businesses handling the personal information of California residents.

What lands on your desk

  1. 01

    Documents into claims

    The policy you published and the questionnaire you were sent, turned into numbered assertions that can be tested one at a time.

    What you receive

    A one-page numbered list of the promises you are currently making.

  2. 02

    Data map

    Every place a name, an email, a device identifier or a session token comes to rest, including systems you do not control.

    What you receive

    A data map you can read, with every third-party recipient named.

  3. 03

    Live requests

    Ask for a copy, withdraw permission, ask for deletion, and record what the system does, including whether the deletion job completes. Regulators run this stage themselves.

    What you receive

    A recorded run of each request, step by step, in your own accounts.

  4. 04

    Produce the diff

    Every assertion marked met or not met, with the evidence beside each one, sized so it can be bought on its own.

    What you receive

    The written diff between what your documents say and what your product does.

  5. 05

    Ordered fixes

    The gaps ranked, with the ones your team owns named separately from ours. Each change goes through code review, tests and a CI gate.

    What you receive

    An ordered plan with owners, and the tests holding each fix in place.

One engagement from our own record, and the part it does not prove

An anonymised engagement from our own record. No client is named.
The claimThe figureThe mechanismWhat backs itWhat it does not prove
We rebuild who can reach what across a fragmented estateFive separate login platforms centralised into one authentication architecture, with a 70 percent drop in access-related support ticketsOAuth 2.0 and user federation, which means one login works across separate applications, deployed across a fragmented application ecosystemAn anonymised engagement from our own record. No client is named.This is access work, not data-protection work, and we will not dress it as a privacy programme.
We build data separation into the model rather than bolting it onOne multi-tenant architecture, meaning several customer organisations run on one system without seeing each other’s data, deployed across three industriesMulti-tenancy means one system serving several customers where each one can only ever reach its own data, deployed across three industriesAn anonymised engagement from our own record.On subject, and still not a delivered deletion or consent programme. We hold no privacy result we can show you.

Your users' data while we work

  • The data ends up somewhere new because you touched it

    What we commit to

    It does not move. You own the code, the cloud and the data from day one. We work inside your Git hosting, cloud accounts and storage, or set them up and hand you the keys if you have none.

  • You call us compliant and it turns out you could not

    We hold no SOC 2, GDPR or HIPAA certification ourselves, we certify nobody, and we are not a law firm.

    What we commit to

    We engineer systems that pass your audits and document the architecture so your compliance people and your counsel can check the design intent. If an engagement needs a certified vendor or a legal opinion, we say so and refer you.

  • An outsider writes a report about our gaps that our board reads

    What we commit to

    The diff is written for you and goes to you, with the fix plan and its owners beside it. What you forward, and to whom, is entirely your own call.

  • We end up depending on you to keep it working

    What we commit to

    Every project starts with the documentation: architecture, deployment, CI/CD pipelines, requirements and change notes. Moving the work in-house or to another partner is a handoff rather than a hostage situation.

Whose problem this is

  • You have a live product, real users, and a policy written before anyone looked at the code

  • A customer or an investor sent a data-protection questionnaire and the deal has stopped

  • You know there is a soft delete, a suppression list or a warehouse never wired into deletion

  • You need the answer in writing with the evidence beside it, not an assurance

Where to go instead

The next step is the document on your desk

Send both and we will tell you which of your assertions are testable.

Before you get on a call with us

The questions that actually get asked, including the one where the honest answer is that there is no clean answer.

What about backups? Nobody ever gives a straight answer.
There is not a fully clean one.
  • The UK's Information Commissioner's Office, whose guidance binds controllers in the UK, takes the position that you can fulfil an erasure on live systems while the data remains in a backup until that backup is overwritten on an established schedule, provided the backup is not used for anything else meanwhile, and it calls the outcome context specific rather than a safe harbour.
  • Its conditions for putting data beyond use all have to hold together, and its own next paragraph says data put beyond use is still held and can still be produced under a court order.
  • That document is version 1.1 dated 26 February 2014, from the Data Protection Act 1998 era, and the ICO's cover note says it has not been updated since the 2018 Act, so treat it as a historic articulation.
  • We are software engineers, not a law firm, and this is not legal advice.
  • What we can do is make the schedule real, show the backup is not read for anything else, and record the restore-time suppression.
What does my team actually have to do, and for how many hours?
The mapping conversations and access to the accounts. A couple of sessions with whoever knows each system, someone to grant read access, then availability when we find something nobody expected. We do not need a standing seat in your sprint, and if a stage would need one we say so before you sign. The diff arrives before any fixing starts, so you have something to forward early.
Is a soft delete good enough?
Usually not.
  • Articles 17(2) and 5(1)(e) of the GDPR, adopted by the European Parliament and the Council and binding controllers in scope of Article 3, are what a row with a deleted flag has to answer to, because it is still stored personal data.
  • We are software engineers, not a law firm, and this is not legal advice.
  • What we can do is engineering: restore-time suppression, where a restored backup replays the deletions before it serves anyone, is where careful teams land, and it is defensible because it can be tested.
  • Anonymising an IP address does nothing while a session identifier beside it still points at the same person.

Send the policy and the questionnaire

The same offer as the top of the page, now that you have what you need to decide.

Two things start this: a link to the privacy policy you published, and the questionnaire that is blocking you. Redact whatever you need to.

What comes back within one business day is a first read from a software engineer rather than a sales desk, saying which of your assertions look testable, what checking them involves, and whether you need us at all. That last answer is a real one and we have given it before.

Tirth Bodawala
Tirth BodawalaCo-founder and CTO, Atyantik Technologies
  • This form does not return a price. It returns a scoping conversation.
  • We hold no certifications and we are not a law firm. If you need either, we will say so and point you somewhere.
  • Your documents stay yours. Nothing is forwarded, published or used as an example.

Start the handover

How we handle what you send is set out in our privacy notice.