Cookie ConsentCMPGDPRToolsBy Gregor Emm· 5 min read

Best Consent Management Platforms Compared (2026)

A consent management platform handles the cookie banner, consent storage, and script blocking that GDPR and CCPA require. Picking the wrong one costs you either money (overpaying for enterprise features) or compliance (choosing one that doesn't actually block cookies).

Here's how the major CMPs compare on what actually matters.

What Matters in a CMP

Not all features are equally important. Here's what to prioritize:

| Feature | Why It Matters | Priority | |---|---|---| | Cookie auto-blocking | Scripts must not fire before consent | Critical | | Google Consent Mode v2 | Required for Google Ads in the EEA since March 2024 | Critical | | IAB TCF 2.2 | Required if you run programmatic ads | High for publishers | | GPC signal support | Legally required under CCPA/CPRA | High for US traffic | | Consent logging | GDPR requires proof of consent | High | | Customizable banner | Brand consistency | Medium | | Page speed impact | Affects Core Web Vitals and SEO | Medium | | Multi-language | Needed for international sites | Varies |

CMP Comparison

Cookiebot (by Usercentrics)

Best for: Small to medium websites wanting a simple, compliant setup

Cookiebot is one of the most widely used CMPs, particularly in Europe. It handles cookie scanning, consent banner, and consent storage in one package.

Strengths:

  • Built-in cookie scanner with auto-categorization
  • Auto-blocking mode (scans your site and blocks cookies automatically)
  • Google Consent Mode v2 certified
  • IAB TCF 2.2 certified
  • GPC support
  • Simple setup — often just a script tag
  • Free tier for small sites

Weaknesses:

  • Limited banner customization on free tier
  • Can add 150-300ms to page load
  • Cookie detection isn't always accurate — new or custom scripts may need manual categorization

Pricing: Free (1 domain, 50 subpages), Premium from ~$15/mo

CookieYes

Best for: Budget-conscious sites that need basic compliance

CookieYes offers the lowest entry price among legitimate CMPs with decent feature coverage.

Strengths:

  • Very affordable
  • Google Consent Mode v2 support
  • Cookie scanner included
  • GDPR + CCPA compliant banners
  • WordPress plugin available
  • Decent banner customization

Weaknesses:

  • Auto-blocking less reliable than Cookiebot
  • No IAB TCF support
  • Limited analytics and reporting
  • Consent logging is basic

Pricing: Free (100 pageviews/month), paid from ~$10/mo

OneTrust CookiePro

Best for: Enterprises needing a CMP as part of a broader privacy platform

CookiePro is OneTrust's consent management product. It's powerful but designed for teams with dedicated privacy resources.

Strengths:

  • Extremely comprehensive — handles every edge case
  • IAB TCF 2.2 certified
  • Google Consent Mode v2 support
  • Advanced geolocation-based consent rules
  • Granular cookie categorization
  • Integrates with OneTrust's broader privacy suite
  • Enterprise-grade consent logging

Weaknesses:

  • Complex setup — requires privacy expertise
  • Expensive
  • Can be slow to load
  • Overkill for most small-medium websites

Pricing: Custom enterprise pricing (typically $500+/mo)

Didomi

Best for: Publishers and media companies with complex ad stacks

Didomi is strong in the European media and publishing space, particularly for sites running programmatic advertising.

Strengths:

  • Excellent IAB TCF 2.2 implementation
  • Google Consent Mode v2 certified
  • Cross-platform consent (web, mobile, CTV)
  • Strong analytics and A/B testing for consent rates
  • Preference center with granular controls
  • Good documentation

Weaknesses:

  • Custom pricing only — no transparent pricing page
  • Less suited for simple websites
  • Primarily European market

Pricing: Custom pricing

Osano

Best for: US-focused mid-market companies wanting simplicity

Osano positions itself as the anti-OneTrust — simpler, with transparent pricing.

Strengths:

  • Transparent pricing
  • Simple setup
  • CCPA + GDPR compliant
  • Vendor monitoring (alerts when third-party privacy policies change)
  • No-code configuration

Weaknesses:

  • No IAB TCF support
  • Google Consent Mode support is basic
  • Less customizable than alternatives
  • US-focused — less suitable for EU-heavy traffic

Pricing: From ~$100/mo (Starter), ~$200/mo (Growth)

Quantcast Choice

Best for: Free TCF-compliant CMP for publishers

Quantcast Choice is a free CMP built by Quantcast, primarily for publishers in the IAB ecosystem.

Strengths:

  • Completely free
  • IAB TCF 2.2 certified
  • Google Consent Mode integration
  • Widely used by publishers
  • Good consent rate optimization

Weaknesses:

  • Quantcast collects data through the platform (it's how they monetize)
  • Limited customization
  • Primarily designed for TCF — less flexible for non-publisher use cases
  • CCPA support is basic

Pricing: Free

Side-by-Side Comparison

| Feature | Cookiebot | CookieYes | CookiePro | Didomi | Osano | Quantcast | |---|---|---|---|---|---|---| | Auto-blocking | Yes | Basic | Yes | Yes | Basic | No | | GCM v2 | Yes | Yes | Yes | Yes | Basic | Yes | | IAB TCF 2.2 | Yes | No | Yes | Yes | No | Yes | | GPC support | Yes | Yes | Yes | Yes | Yes | No | | Consent logging | Yes | Basic | Advanced | Advanced | Yes | Yes | | Free tier | Yes | Yes | No | No | No | Yes | | Starting price | ~$15/mo | ~$10/mo | ~$500/mo | Custom | ~$100/mo | Free |

The CMP Doesn't Guarantee Compliance

Here's what most CMP vendors won't tell you: installing a CMP doesn't make you compliant.

A CMP manages consent. But if:

  • A developer adds a script directly to the page template (bypassing the CMP)
  • A marketer installs a pixel via Google Tag Manager without categorizing it
  • The CMP's auto-blocking misses a custom tracking script
  • The consent banner is configured with pre-checked boxes (still a GDPR violation)

...then cookies fire before consent despite having a CMP installed.

This is why we built Tag Leak — to independently verify that consent is working correctly, regardless of which CMP you use. We scan hundreds of websites and regularly find pre-consent tracking on sites with properly installed CMPs.

Recommended approach:

  1. Install a CMP (any from this list)
  2. Scan your site with Tag Leak to verify it's working
  3. Set up monitoring to catch regressions when scripts change

How to Choose

Pick Cookiebot if you want a simple, well-tested CMP that handles most use cases. Best balance of features, compliance, and price for most websites.

Pick CookieYes if budget is the top priority and you have a simple site without programmatic advertising.

Pick OneTrust CookiePro if you're an enterprise with a privacy team and need a CMP that integrates into a broader privacy program.

Pick Didomi if you're a publisher running programmatic ads and need excellent TCF support.

Pick Osano if you're a US-focused SaaS company wanting simple consent management with transparent pricing.

Pick Quantcast Choice if you're a publisher who needs a free, TCF-certified CMP and is comfortable with Quantcast's data practices.

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Frequently Asked Questions

What is a consent management platform (CMP)?

A CMP is software that manages user consent for cookies and data processing on your website. It displays the cookie banner, records user preferences, blocks non-essential cookies until consent, and provides signals to advertising platforms (like Google Consent Mode) about the user's consent state.

Do I need a CMP for GDPR compliance?

If your website uses non-essential cookies (analytics, advertising, social media) and has EU visitors, you need a mechanism to get and manage consent. A CMP is the standard way to do this, though some websites build custom solutions. Without some form of consent management, you're likely violating GDPR.

What is Google Consent Mode v2 and why does my CMP need it?

Google Consent Mode v2 is a framework that adjusts how Google tags (Analytics, Ads) behave based on user consent. Since March 2024, it's required for personalized advertising in the EEA. Your CMP must send the correct consent signals to Google tags, or your ads campaigns will lose conversion data and audience building capabilities.

What's the difference between a CMP and a cookie scanner?

A CMP manages consent — it shows the banner, stores preferences, and blocks cookies. A cookie scanner audits your site to detect what cookies exist and whether they comply with consent rules. They serve different purposes: the CMP is the implementation, the scanner is the verification. You ideally need both.

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Tag Leak · Free Tool

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