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Legal · head to head

Aderant vs Harvey

Aderant logo

Aderant

Legal

Practice and financial management for large law firms

From
On request
Rated
-
Full reviewWebsite
Harvey logo

Harvey

Legal

AI research and drafting platform for large law firms, sold on enterprise-only seat pricing with no self-service tier and reported contracts from roughly $50,000 to $360,000 a year

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.; Harvey there is no published pricing anywhere, and no self-service tier at all, so even qualifying for a quote requires an enterprise sales process most small and mid-size firms cannot justify starting.
  • They diverge on capability: Aderant covers Aderant Expert, Harvey covers Legal research assistant.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Aderant and Harvey actually diverge.

Attributes where Aderant and Harvey differ
AttributeAderantHarvey
PlatformsWindows, Web, iOS, AndroidWeb

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 Harvey

  • Legal research assistant
  • Contract analysis
  • Document drafting
  • Workflow-specific tools
  • DMS integration
  • Firm-tuned deployment

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 Harvey
  • Practices replacing an ageing time and billing system without leaving the large firm segmentnot Harvey
  • Firms needing conflicts checking and new business intake governed by an approval workflownot Harvey
  • Partnerships reporting profitability by practice group and requiring realisation analysisnot Harvey

Harvey

  • An AmLaw 100 or 200 firm wanting AI-assisted due diligence review across large contract setsnot Aderant
  • A large corporate legal department needing firm-tuned drafting on its own precedent librarynot Aderant
  • A litigation practice wanting AI research assistance integrated directly with its document management systemnot Aderant
  • A firm large enough to absorb a 25-seat minimum and enterprise contract cost, evaluating AI tools at BigLaw scalenot 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.

Harvey

  • There is no published pricing anywhere, and no self-service tier at all, so even qualifying for a quote requires an enterprise sales process most small and mid-size firms cannot justify starting.
  • 25-seat minimums put it structurally out of reach for solo, boutique and most mid-size firms regardless of interest.
  • Reported additional platform fees on top of the headline per-seat licence mean the effective total cost is materially higher than the quoted seat price alone suggests.
  • As a well-funded, fast-growing AI vendor, its product and pricing model are still evolving quickly, which is a real risk for a firm signing a multi-year enterprise contract now.
  • Being trained and marketed specifically for BigLaw workflows means smaller firms evaluating it are comparing themselves against a product that was not built or priced with them in mind.

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

Harvey

On request
  • Enterprise (BigLaw)$undefined/year
    • No self-service signup, quote-only via sales
    • 25-seat minimums commonly reported
    • Reported per-seat cost roughly $1,000-2,000/month depending on usage tier

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 Harvey if

  • You need legal research assistant.
  • You also want contract analysis.
Harvey review

Questions people ask

Is Aderant or Harvey better?
Neither clearly leads. Aderant starts at On request and Harvey at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Aderant or Harvey?
Aderant starts at On request and Harvey at On request.
Does Aderant or Harvey run on more platforms?
Aderant runs on Windows, Web, iOS, Android. Harvey runs on Web.
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 Harvey is typically brought in for.
What can Aderant do that Harvey cannot?
Aderant covers Aderant Expert, Conflicts and new business intake, Docketing and calendaring, Multi-currency and multi-entity billing. Harvey covers Legal research assistant, Contract analysis, Document drafting, Workflow-specific tools.

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.

Harvey: Can a small firm buy Harvey?

In practice, no. There is no self-service tier, and reported 25-seat minimums and six-figure contract values put it out of reach for most small and mid-size firms.

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.

Harvey: How much does Harvey actually cost?

Nothing is published. Third-party reporting estimates $1,000-2,000 per seat per month and enterprise contracts from roughly $360,000 to over $1.5 million a year including platform fees.

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.

Harvey: Does Harvey replace Westlaw or LexisNexis?

No. It is an AI research, drafting and review layer, typically deployed alongside rather than instead of a primary legal research database.

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