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Legal · head to head

Aderant vs Tabs3

Aderant logo

Aderant

Legal

Practice and financial management for large law firms

From
On request
Rated
-
Full reviewWebsite
Tabs3 logo

Tabs3

Legal

Billing, trust and general ledger accounting for small and mid-sized US law firms

From
$69/month
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.; Tabs3 the interface follows Windows desktop conventions from an earlier era, so new fee earners and staff take longer to train than they would on a browser-based competitor.
  • They diverge on capability: Aderant covers Aderant Expert, Tabs3 covers Tabs3 Billing.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Aderant and Tabs3 actually diverge.

Attributes where Aderant and Tabs3 differ
AttributeAderantTabs3
Starting priceOn request$69/month
Pricing modelquotePer user per month

Identical on both: free tier (No), platforms (Windows, Web, iOS, Android), 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 Tabs3

  • Tabs3 Billing
  • Trust accounting
  • General ledger and accounts payable
  • PracticeMaster
  • On-premises or cloud subscription

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 Tabs3
  • Practices replacing an ageing time and billing system without leaving the large firm segmentnot Tabs3
  • Firms needing conflicts checking and new business intake governed by an approval workflownot Tabs3
  • Partnerships reporting profitability by practice group and requiring realisation analysisnot Tabs3

Tabs3

  • Small firms billing hourly that want billing and the firm general ledger in one system rather than reconciling twonot Aderant
  • Practices that must run three-way trust reconciliation without a separate bookkeeping packagenot Aderant
  • Firms that need an on-premises deployment because of client or insurer restrictions on cloud-hosted matter datanot Aderant
  • Long-established practices replacing a decades-old billing system while keeping accounting in housenot 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.

Tabs3

  • The interface follows Windows desktop conventions from an earlier era, so new fee earners and staff take longer to train than they would on a browser-based competitor.
  • On-premises deployment puts backup, disaster recovery, server upgrades and patching on the firm, which small practices without IT support routinely underestimate.
  • It is built around hourly and flat fee billing, so a contingency practice tracking case costs and settlement disbursements will find the case financial model a poor fit.
  • PracticeMaster case management is priced separately from billing, so the advertised per-user rate is not what a firm wanting matter management actually pays.
  • Choosing the on-premises option no longer avoids a subscription, because it is billed per user per month like the hosted version.

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

Tabs3

$69/month
  • OnSite Subscription$69/month
    • Deployed on the firm server
    • Billing, trust accounting and general ledger
    • PracticeMaster add-on at 32 USD per user per month
  • Tabs3 Cloud$89/month
    • Hosted by the vendor
    • Billing, trust accounting and general ledger
    • PracticeMaster add-on at 35 USD per user per month

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 Tabs3 if

  • You need tabs3 billing.
  • You work on Windows, Web, iOS, Android.
  • You also want trust accounting.
Tabs3 review

Questions people ask

Is Aderant or Tabs3 better?
Neither clearly leads. Aderant starts at On request and Tabs3 at $69/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Aderant or Tabs3?
Aderant starts at On request and Tabs3 at $69/month.
Does Aderant or Tabs3 run on more platforms?
Both run on Windows, Web, iOS, Android, so platform support will not decide this one for you.
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 Tabs3 is typically brought in for.
What can Aderant do that Tabs3 cannot?
Aderant covers Aderant Expert, Conflicts and new business intake, Docketing and calendaring, Multi-currency and multi-entity billing. Tabs3 covers Tabs3 Billing, Trust accounting, General ledger and accounts payable, PracticeMaster.

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.

Tabs3: Is Tabs3 right for a personal injury firm working on contingency?

No. It is built for hourly and flat fee billing with a firm general ledger. A contingency practice needs case cost tracking and settlement disbursement handling, which is what CASEpeer and Filevine are built around.

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.

Tabs3: Can I still buy Tabs3 as a perpetual licence?

No published perpetual price exists. The on-premises option, called OnSite Subscription, starts at 69 USD per user per month, with the hosted Tabs3 Cloud starting at 89 USD per user per month.

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.

Tabs3: Does it replace QuickBooks?

For most firms yes. It includes a double-entry general ledger and accounts payable, which is the usual reason firms choose it over billing-only products.

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