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Legal · head to head

Aderant vs Didomi

Aderant logo

Aderant

Legal

Practice and financial management for large law firms

From
On request
Rated
-
Full reviewWebsite
Didomi logo

Didomi

Legal

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

From
On request
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Aderant implementation is a programme of work with consultants and data migration, so the licence fee is a minority of the real first year 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.
  • They diverge on capability: Aderant covers Aderant Expert, Didomi covers Google CMP certification.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Aderant and Didomi actually diverge.

Attributes where Aderant and Didomi differ
AttributeAderantDidomi
PlatformsWindows, Web, iOS, AndroidWeb, iOS, Android, Connected TV, API

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 Aderant

  • Aderant Expert
  • Conflicts and new business intake
  • Docketing and calendaring
  • Multi-currency and multi-entity billing
  • Business intelligence

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

What people use each for

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

Aderant

  • Firms of a hundred or more fee earners needing matter financials across multiple offices and currenciesnot Didomi
  • Practices replacing an ageing time and billing system without leaving the large firm segmentnot Didomi
  • Firms needing conflicts checking and new business intake governed by an approval workflownot Didomi
  • Partnerships reporting profitability by practice group and requiring realisation analysisnot Didomi

Didomi

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

Where each one falls short

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

Aderant

  • Implementation is a programme of work with consultants and data migration, so the licence fee is a minority of the real first year cost.
  • It is designed for large firms, so a practice below roughly fifty fee earners pays for governance and reporting depth it will never use.
  • Ownership by an acquisitive holding company tends to mean predictable maintenance uplifts at renewal rather than competitive discounting.
  • The credible alternative set is effectively one other product, which weakens a firm's negotiating position because switching is genuinely expensive.
  • Nothing about pricing is published, so budgeting requires a sales engagement and useful comparisons come only from peer firms.

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.

Pricing, plan by plan

Aderant

On request
  • Aderant Expert$undefined/year
    • Enterprise licensing quoted per firm
    • Implementation, migration and consultancy quoted separately
    • Annual maintenance and support

Didomi

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

Which should you pick?

Choose Aderant if

  • You need aderant expert.
  • You work on Windows, Web, iOS, Android.
  • You also want conflicts and new business intake.
Aderant review

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

Questions people ask

Is Aderant or Didomi better?
Neither clearly leads. Aderant starts at On request and Didomi at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Aderant or Didomi?
Aderant starts at On request and Didomi at On request.
Does Aderant or Didomi run on more platforms?
Aderant runs on Windows, Web, iOS, Android. Didomi runs on Web, iOS, Android, Connected TV, API.
What is Aderant best used for?
Aderant is most often used for firms of a hundred or more fee earners needing matter financials across multiple offices and currencies, practices replacing an ageing time and billing system without leaving the large firm segment, firms needing conflicts checking and new business intake governed by an approval workflow, partnerships reporting profitability by practice group and requiring realisation analysis. Of those, firms of a hundred or more fee earners needing matter financials across multiple offices and currencies and practices replacing an ageing time and billing system without leaving the large firm segment are not what Didomi is typically brought in for.
What can Aderant do that Didomi cannot?
Aderant covers Aderant Expert, Conflicts and new business intake, Docketing and calendaring, Multi-currency and multi-entity billing. Didomi covers Google CMP certification, IAB TCF support, Connected TV and OTT, Mobile SDKs.

Answered from the vendors’ own pages

Aderant: Who owns Aderant?

Roper Technologies acquired Aderant in 2015. Roper buys and holds vertical market software businesses, which in practice means long product support and steady renewal pricing rather than rapid change.

Didomi: Is Didomi Google-certified?

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

Aderant: What size of firm is Aderant for?

Large firms, broadly a hundred fee earners and above. Smaller practices are better served by Clio, Tabs3 or Smokeball.

Didomi: Does it support IAB TCF?

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

Aderant: What does it compete with?

Thomson Reuters Elite 3E is the main alternative at this size, and most large firm selections come down to those two.

Didomi: What does it cost?

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

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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