Privacy Compliance Challenges for AdTech Platforms

What privacy challenges are AdTech companies facing?

The AdTech industry is navigating a converging set of technical and regulatory pressures that affect how user data can be collected, stored, and used. The key challenges break down as follows:

• Safari's Intelligent Tracking Prevention (ITP) blocks third-party cookies by default and places restrictions on how long first-party cookies and local storage data can be retained in a user's browser.

• Firefox's Enhanced Tracking Protection blocks cross-site tracking cookies — the third-party cookies that AdTech platforms rely on — by default, and can also block device fingerprints when users adjust their privacy settings.

• GDPR requires publishers, advertisers, and AdTech platforms to obtain explicit and voluntary consent from users before collecting their data. This applies broadly across the EU and to any platform processing data belonging to EU residents.

• EU Data Protection Authorities (DPAs) have already opened investigations into AdTech companies for GDPR non-compliance. Notably, the UK's ICO has stated that the way user data is collected via real-time bidding (RTB) is not compliant with the GDPR — a position that puts pressure on the entire programmatic supply chain.

• The California Consumer Privacy Act (CCPA) gives California residents the right to opt out of the sale of their personal data, adding a significant compliance layer for any platform with a US audience.

Taken together, these pressures mean that AdTech platforms can no longer treat privacy compliance as an afterthought. Browser-level restrictions erode the technical mechanisms that have underpinned targeted advertising for years, while regulatory frameworks impose legal obligations that go beyond best-effort efforts. Building platforms with consent management, first-party data strategies, and RTB transparency baked in from the start is increasingly the baseline expectation — not an advanced feature.