Didomi vs OneTrust

Why Switch from OneTrust to Didomi?

OneTrust is the dominant US-headquartered privacy and consent management platform, with a broad product suite covering privacy, GRC, ethics, and ESG. For European publishers, brands, and businesses, the trade-offs are familiar: OneTrust is US-jurisdiction (Atlanta-headquartered), consent records flow through US infrastructure, and the platform breadth often exceeds focused-consent-management needs.

Didomi is the French alternative. Paris-headquartered, fully EU jurisdiction, IAB TCF-certified at the highest compliance level, with deep expertise in European consent-management patterns. Used by European publishers and brands such as Mediahuis, Webedia and Europcar.

Feature Comparison

Feature	Didomi	OneTrust
Jurisdiction	France 🇫🇷	United States 🇺🇸
Data location	EU (AWS Frankfurt; EU sub-processors)	Multiple regions incl. EU (Azure); US parent
GDPR	✅ Native	⚠️ Provider claims
CLOUD Act exposure	⚠️ Low (EU company; US-owned AWS host)	⚠️ Yes
IAB TCF certified	✅ Highest level	✅
Consent management	✅ Best-in-class focus	✅
Preference Management Center	✅ Native	✅
GRC/ESG modules	Limited	✅ Best-in-class breadth
Native multilingual UI	✅ FR/EN/DE/ES/IT and more	✅
Pricing entry	Quote-based	Quote-based

For European consent-management focus, Didomi is structurally aligned. For broader US-style enterprise privacy + GRC + ESG platform, OneTrust still wins.

Pricing

Neither vendor publishes CMP prices (as of October 2026).

Didomi’s consent management platform comes in three tiers, all quote-based and priced by monthly unique visitors, with unlimited domains:

• Essential
• Advanced (marked “Most popular”)
• Premium

There is no free CMP plan. Didomi’s only free tier is for its separate Server-Side Tagging product (100,000 requests/month).

OneTrust lists three consent offerings, each with “Get Pricing” (quote-based):

• Consent Management Platform (CMP) Base
• CMP Suite
• Universal Consent & Preference Management (UCPM)

Because both are sales-led, the only way to compare cost is to request quotes for your own traffic volume. If you want a European CMP with published self-serve prices, see Usercentrics vs OneTrust.

Privacy & Data Sovereignty

Didomi’s structural advantages:

• French corporate jurisdiction — Didomi SAS subject to French and EU law
• EU hosting (AWS Frankfurt region) for consent records and user data
• GDPR-native with comprehensive Article 28 DPA
• CNIL-aligned for French regulator expectations
• No US parent company — though hosting runs on US-owned AWS (EU region)
• NIS2-aligned practices

For European publishers handling millions of consent decisions daily — and brands collecting consent for marketing, profiling, and data-sharing purposes — EU jurisdiction at the consent-management layer is materially relevant.

Migration Guide

Moving from OneTrust to Didomi typically takes 4-8 weeks for substantial deployments:

1. Didomi contracting and onboarding (1 week)
2. Audit current OneTrust configuration — cookie inventory, vendor list, banner copy (1 week)
3. Configure Didomi consent policy with equivalent inventory and CMP behaviour (1 week)
4. Export and import historical consent records (1 week)
5. Deploy Didomi banner replacing OneTrust (1 week)
6. Validate consent signal flow through ad-tech supply chain (1-2 weeks)
7. Migrate preference-management workflows (1 week)
8. Decommission OneTrust (administrative)

Estimated total time: 4-8 weeks for moderate publishers; longer for complex multi-brand enterprises. Difficulty: Moderate-high; consent management has substantial ad-tech integration complexity.

Example Scenarios

Illustrative scenarios of how teams typically use these tools — not documented customer case studies.

A European news publisher (illustrative) can use Didomi’s Preference Management Platform on its news sites to collect reader preferences as a “second consent” layer for better-targeted advertising.

A pan-European e-commerce brand (illustrative) can run Didomi across its country-specific websites, managing localised cookie banners from a single console and documenting consent per Member State.

A German Mittelstand company (illustrative) can use Didomi for consent management on its corporate website, with German-language banners that its data protection officer can review against German supervisory-authority guidance.

Company Background

Didomi SAS was founded in 2017 in Paris by Romain Gauthier, Jawad Stouli, and Raphaël Boukris. The company emerged from observation that European consent management was poorly served by US-built platforms designed primarily around CCPA and US ad-tech patterns. Didomi built consent management explicitly around GDPR + IAB TCF + European publisher operational needs.

By 2026, Didomi serves thousands of European publishers and brands including media groups such as Mediahuis and Webedia, brands such as Europcar, and substantial e-commerce and SaaS customers. The company has raised significant venture funding while maintaining French operational base and EU jurisdiction throughout. Mediahuis, for example, uses Didomi’s Preference Management Platform on its news sites to collect reader preferences for better-targeted advertising, according to a 2022 Didomi case study.

Security & Compliance

• ISO 27001 certified
• GDPR-native with comprehensive Article 28 DPA
• CNIL-aligned for French regulator expectations
• IAB TCF certified at highest compliance level
• EU hosting (AWS Frankfurt; EU-based sub-processors)
• TLS 1.3 for all data in transit
• AES-256 for data at rest
• NIS2-aligned practices

Integration Ecosystem

• Ad-tech: IAB TCF v2.2 native, Google CMP partner, Microsoft Advertising integration
• Tag managers: Google Tag Manager, Tealium, Adobe Launch
• CMS: WordPress, Drupal, Adobe Experience Manager, custom CMS
• CDPs: Segment, mParticle, Tealium AudienceStream
• Analytics: native consent signalling to Google Analytics, Plausible, Matomo, others
• API: comprehensive REST API
• Webhook callbacks for consent events

Who Should Switch?

Didomi is ideal for:

• European publishers managing IAB TCF consent infrastructure
• Brands operating in multiple European markets with multilingual consent requirements
• Mid-market and enterprise organisations with EU jurisdiction procurement preferences
• CNIL-aware French businesses wanting native regulator alignment
• CMP-focused use cases (where OneTrust’s broader GRC/ESG breadth isn’t needed)

The Bottom Line

OneTrust remains the right choice for organisations using its full privacy + GRC + ESG enterprise platform breadth. For European publishers, brands, and businesses focused specifically on best-in-class consent management with EU jurisdiction, Didomi is the better choice: French corporate base, EU data infrastructure, IAB TCF certification at highest level, and proven adoption across major European media and brand customers.

---

Looking for more European privacy and compliance alternatives? See also: Plausible vs Google Analytics and SoSafe vs KnowBe4.

Frequently Asked Questions

How does Didomi compare to OneTrust?

Both are full-featured consent management platforms. OneTrust is the larger US-headquartered platform with broader product suite (privacy + GRC + ethics + ESG). Didomi is focused on consent management specifically, with deeper European market expertise and EU jurisdiction. For European publishers, brands, and businesses prioritising GDPR-native consent management with EU sovereignty, Didomi is typically the better structural fit.

What's IAB TCF certification?

The Interactive Advertising Bureau Transparency and Consent Framework (IAB TCF) is the standardised technical specification for handling user consent in programmatic advertising. Didomi is certified at the highest TCF compliance level — meaning its consent signals are recognised by the entire programmatic-advertising ecosystem. For publishers and advertisers, this is essential infrastructure that ensures consent decisions actually flow through the ad-tech supply chain.

Is data hosted in the EU?

Yes. According to Didomi's sub-processor list, raw CMP, PMP and DSAR data is hosted on AWS EMEA SARL in Frankfurt (Germany), analytics run on Snowflake in the same Frankfurt region, and all listed sub-processors are EU-based. Didomi SAS is a French company subject to French and EU law, with no US parent — although its hosting provider AWS is a US-owned group. That matters because consent records contain personal data covered by GDPR.

What's the Preference Management Center?

Beyond cookie consent, Didomi's Preference Management Center handles broader user preference management — marketing communications, data-processing purposes, third-party sharing preferences. This unified preference layer simplifies the GDPR data-subject-rights workflow significantly versus managing consent and preferences in separate systems.

Can I migrate from OneTrust?

Yes. Standard process: 1) Export OneTrust consent records and configurations, 2) Configure Didomi with equivalent preference/consent policies, 3) Bulk-import historical consent records (formats are compatible), 4) Deploy Didomi consent banner replacing OneTrust, 5) Validate consent flow through ad-tech supply chain, 6) Decommission OneTrust. Plan for 4-8 weeks for substantial publisher or enterprise deployments.