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Legal · head to head

Didomi vs Relativity

Didomi logo

Didomi

Legal

Google-certified and IAB TCF consent management across web, mobile and connected TV

From
On request
Rated
-
Full reviewWebsite
Relativity logo

Relativity

Legal

Ediscovery and legal data platform for large matters

From
On request
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Didomi pricing is based on monthly unique visitors and is not published, so a large publisher cannot estimate cost before entering a sales process, and traffic spikes translate directly into billing surprises.; Relativity quote-only and expensive, typically billed on data volume, so costs escalate with matter size
  • They diverge on capability: Didomi covers Google CMP certification, Relativity covers Large-scale processing.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Didomi and Relativity actually diverge.

Attributes where Didomi and Relativity differ
AttributeDidomiRelativity
PlatformsWeb, iOS, Android, Connected TV, APIWeb, Cloud, Self-hosted

Identical on both: starting price (On request), pricing model (quote), free tier (No), user rating (Not yet rated), category (Legal).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Didomi

  • Google CMP certification
  • IAB TCF support
  • Connected TV and OTT
  • Mobile SDKs
  • Consent proof storage
  • Preference centre
  • Consent analytics
  • Global privacy regimes

Only in Relativity

  • Large-scale processing
  • Review workflow
  • Analytics and active learning
  • Application ecosystem

What people use each for

The jobs each tool is most often brought in to do.

Didomi

  • A European publisher whose Google Ad Manager revenue is withheld without a Google-certified CMP integrated with Consent Modenot Relativity
  • A broadcaster collecting consent on connected TV apps, where certified CMP options are very limitednot Relativity
  • A multinational advertiser needing one consent signal honoured consistently across web, iOS and Android propertiesnot Relativity
  • A group that must produce consent evidence to a data protection authority following a complaintnot Relativity

Relativity

  • Large litigation with very high document volumesnot Didomi
  • Corporate investigations requiring defensible, auditable reviewnot Didomi
  • Firms whose review process is already built around the platformnot Didomi

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Didomi

  • Pricing is based on monthly unique visitors and is not published, so a large publisher cannot estimate cost before entering a sales process, and traffic spikes translate directly into billing surprises.
  • Consent banners depress measurable traffic by design, and Didomi cannot prevent that, so publishers moving from a non-compliant banner should expect an immediate drop in tracked users and attributable conversions.
  • Certification is a moving target: Google and IAB update requirements periodically and each version change forces integration work on your side, not only on the vendor's.
  • Connected TV consent collection depends on the app platform and remote control interface, and implementations are considerably more involved than a web banner, often requiring per-platform development.
  • The wider privacy suite beyond consent is thinner than dedicated privacy platforms, so an organisation needing data subject rights automation and data mapping usually buys a second vendor anyway.

Relativity

  • Quote-only and expensive, typically billed on data volume, so costs escalate with matter size
  • Complex enough that certified specialists are a job title, which is a real staffing cost
  • Considerable overkill for small matters, where lighter self-service tools are far cheaper

Pricing, plan by plan

Didomi

On request
  • Didomi CMP$undefined/year
    • Google-certified CMP for web, mobile and CTV
    • IAB TCF registered
    • Consent proof storage and analytics

Relativity

On request

No published plan breakdown. See the Relativity review.

Which should you pick?

Choose Didomi if

  • You need google cmp certification.
  • You work on Web, iOS, Android, Connected TV, API.
  • You also want iab tcf support.
Didomi review

Choose Relativity if

  • You need large-scale processing.
  • You work on Web, Cloud, Self-hosted.
  • You also want review workflow.
Relativity review

Questions people ask

Is Didomi or Relativity better?
Neither clearly leads. Didomi starts at On request and Relativity at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Didomi or Relativity?
Didomi starts at On request and Relativity at On request.
Does Didomi or Relativity run on more platforms?
Didomi runs on Web, iOS, Android, Connected TV, API. Relativity runs on Web, Cloud, Self-hosted.
What is Didomi best used for?
Didomi is most often used for a european publisher whose google ad manager revenue is withheld without a google-certified cmp integrated with consent mode, a broadcaster collecting consent on connected tv apps, where certified cmp options are very limited, a multinational advertiser needing one consent signal honoured consistently across web, ios and android properties, a group that must produce consent evidence to a data protection authority following a complaint. Of those, a european publisher whose google ad manager revenue is withheld without a google-certified cmp integrated with consent mode and a broadcaster collecting consent on connected tv apps, where certified cmp options are very limited are not what Relativity is typically brought in for.
What can Didomi do that Relativity cannot?
Didomi covers Google CMP certification, IAB TCF support, Connected TV and OTT, Mobile SDKs. Relativity covers Large-scale processing, Review workflow, Analytics and active learning, Application ecosystem.

Answered from the vendors’ own pages

Didomi: Is Didomi Google-certified?

Yes, for web, mobile and connected TV, and the certification has been renewed across multiple years.

Relativity: What does Relativity cost?

It does not publish rates. Ediscovery is generally billed on data volume and users, quoted per matter or organisation.

Didomi: Does it support IAB TCF?

Yes, it is a registered TCF CMP, currently supporting version 2.2 and later revisions.

Relativity: Is Relativity only for law firms?

No. Corporate legal departments and government agencies use it for investigations as well as litigation.

Didomi: What does it cost?

Not published. Pricing is based on monthly unique visitors and quoted.

Relativity: Do I need trained staff?

In practice yes. Relativity certification is a recognised specialism, and that staffing cost is part of the total.

Didomi: Where is consent data stored?

Didomi is a French company and offers European storage, which matters for procurement teams weighing supervisory jurisdiction.

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