cmp, compliance
Why every CMP subscription is a compliance time bomb
When your consent banner depends on a monthly payment, your compliance dies the moment the invoice bounces. Here's why self-hosted is the only sane default.
Blog
Thoughts on consent, privacy, and building in the open
Product updates, engineering deep-dives, and honest takes from the team building Zest.
google, consent-mode
Google Consent Mode v2: what it actually does and why you need it
A plain-language breakdown of Google Consent Mode v2 — what signals it sends, how it affects your analytics and ads, and what happens if you ignore it.
zest, engineering
16KB of JavaScript that replaces your $50/month CMP
How we built a full-featured consent management platform in ~16KB gzipped — banner, modal, script blocking, cookie interception, 12 languages, zero dependencies.
privacy, gpc
Do Not Track is dead. Global Privacy Control is the replacement.
DNT failed because it was optional. GPC is succeeding because it's legally enforceable. Here's the difference and why your CMP should support both.
privacy, cmp
The hidden cost of 'free' consent banners: your data
When the consent banner is free, you are not the customer. You're the data source. Here's what hosted CMPs do with your visitors' consent records.
geo, gdpr
Geo-targeted consent: one banner for GDPR, another for the rest of the world
Showing an opt-in banner to a visitor in California is wrong. Showing nothing to a visitor in Germany is illegal. Here's how geo-targeted consent works.
Own your cookie banner.
Zest is free and MIT-licensed, and it doesn't phone home to anyone.
Drop the script in and you're done.