What most link trackers collect
Standard link analytics platforms capture: full IP addresses, precise GPS coordinates (when available), cookie identifiers that persist across sessions, device fingerprints, and full referrer URLs including query parameters.
Most of this is collected without explicit user consent, often under the legal basis of 'legitimate interest' — a GDPR basis that is increasingly scrutinized by data protection authorities across the EU.
What GDPR actually requires for link analytics
GDPR applies when you process personal data of EU residents. An IP address is considered personal data under GDPR. Precise geographic data is personal data. Cookie identifiers are personal data.
If you're tracking link clicks and storing any of the above, you need either consent (explicit, informed, and freely given) or a valid legal basis. 'Legitimate interest' for analytics is valid but requires a balancing test — and regulators are increasingly skeptical of it for non-essential tracking.
The simplest compliance approach: don't collect data you don't need.
The data you actually need vs. the data you collect
Ask yourself: what decisions does my analytics data drive? For most link tracking use cases, the answer is: 'I want to know which campaigns perform best, where my audience is broadly located, and what devices they use.'
That data doesn't require a full IP address. Country-level geolocation is sufficient and can be derived from anonymized IP ranges. Device type (Mobile/Desktop/Tablet) doesn't require fingerprinting — the User-Agent header provides it. Referrer domain (not the full URL with parameters) tells you traffic source.
How ZipLink approaches data minimization
ZipLink records: timestamp, anonymized location (country + city, derived from IP at the edge and never stored as a raw IP), User-Agent parsed into browser/OS/device category, and referrer domain.
Raw IP addresses are read only to perform the geo lookup and are never persisted to the database. This means there's no PII stored in the analytics records.
This approach gives you the actionable signals you need — geographic distribution, device split, referrer sources, click timing — without storing data that creates regulatory exposure.
What you should still have in your privacy policy
Even with data minimization, you're collecting some data. Your privacy policy should describe: what data is collected on link clicks, how long it is retained, what third-party services (like Upstash Redis) process it, and how users can request deletion.
Data retention is often overlooked. Keeping analytics records indefinitely creates liability. Consider an automatic purge policy for click data older than 12-24 months.
GDPR compliance is a process, not a checkbox. Data minimization is the highest-leverage starting point — collect less, and most of the other obligations become easier to meet.