Softwr

Legal · head to head

CosmoLex vs Relativity

CosmoLex logo

CosmoLex

Legal

Practice management with a full legal general ledger and trust accounting built in

From
$89/month
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: CosmoLex the built-in accounting suits a single law firm entity, so practices with multiple entities, payroll or unusual revenue recognition still need an external accountant and a second system.; Relativity quote-only and expensive, typically billed on data volume, so costs escalate with matter size
  • They diverge on capability: CosmoLex covers Built-in general ledger, Relativity covers Large-scale processing.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which CosmoLex and Relativity actually diverge.

Attributes where CosmoLex and Relativity differ
AttributeCosmoLexRelativity
Starting price$89/monthOn request
Pricing modelPer user per monthquote
PlatformsWeb, iOS, AndroidWeb, Cloud, Self-hosted

Identical on both: 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 CosmoLex

  • Built-in general ledger
  • Three-way trust reconciliation
  • Time and expense capture
  • Billing and LEDES
  • CosmoLex Pay
  • Matter management

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.

CosmoLex

  • A two to ten lawyer firm that wants to stop paying for and reconciling QuickBooks alongside its practice systemnot Relativity
  • A firm that has failed or fears failing a bar trust account audit and needs three-way reconciliation as standardnot Relativity
  • A solo practice with no bookkeeper that needs the books to be correct without accounting knowledgenot Relativity
  • A firm doing insurer defence work that must produce LEDES invoices without a separate billing toolnot Relativity

Relativity

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

Where each one falls short

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

CosmoLex

  • The built-in accounting suits a single law firm entity, so practices with multiple entities, payroll or unusual revenue recognition still need an external accountant and a second system.
  • Document management is basic storage rather than versioned matter-centric DMS, so firms with heavy document workflow outgrow it and bolt on something else.
  • The integration catalogue is materially smaller than Clio, so niche intake, e-discovery or automation tools often require manual export instead of a native connection.
  • Ownership sits with ProfitSolv alongside Tabs3, TimeSolv and Rocket Matter, and buyers have limited visibility into which brand receives investment over a three-year contract.
  • The interface and reporting feel dated next to newer competitors, and custom reporting in particular often means exporting to a spreadsheet.

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

CosmoLex

$89/month
  • CosmoLex$89/month
    • Per user per month billed annually, higher month to month
    • General ledger and trust accounting included rather than sold as an add-on
    • Payment processing charged at card and bank transaction rates

Relativity

On request

No published plan breakdown. See the Relativity review.

Which should you pick?

Choose CosmoLex if

  • You need built-in general ledger.
  • You work on Web, iOS, Android.
  • You also want three-way trust reconciliation.
CosmoLex 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 CosmoLex or Relativity better?
Neither clearly leads. CosmoLex starts at $89/month and Relativity at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, CosmoLex or Relativity?
CosmoLex starts at $89/month and Relativity at On request.
Does CosmoLex or Relativity run on more platforms?
CosmoLex runs on Web, iOS, Android. Relativity runs on Web, Cloud, Self-hosted.
What is CosmoLex best used for?
CosmoLex is most often used for a two to ten lawyer firm that wants to stop paying for and reconciling quickbooks alongside its practice system, a firm that has failed or fears failing a bar trust account audit and needs three-way reconciliation as standard, a solo practice with no bookkeeper that needs the books to be correct without accounting knowledge, a firm doing insurer defence work that must produce ledes invoices without a separate billing tool. Of those, a two to ten lawyer firm that wants to stop paying for and reconciling quickbooks alongside its practice system and a firm that has failed or fears failing a bar trust account audit and needs three-way reconciliation as standard are not what Relativity is typically brought in for.
What can CosmoLex do that Relativity cannot?
CosmoLex covers Built-in general ledger, Three-way trust reconciliation, Time and expense capture, Billing and LEDES. Relativity covers Large-scale processing, Review workflow, Analytics and active learning, Application ecosystem.

Answered from the vendors’ own pages

CosmoLex: Do I still need QuickBooks?

No. CosmoLex carries its own general ledger and trust ledgers, which is the main reason firms choose it over Clio or MyCase.

Relativity: What does Relativity cost?

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

CosmoLex: Does it handle IOLTA compliance?

Yes. Trust ledgers, overdraft prevention and three-way reconciliation are in the core product rather than in a paid tier.

Relativity: Is Relativity only for law firms?

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

CosmoLex: Who owns CosmoLex?

ProfitSolv, a private-equity backed group that also owns Tabs3, TimeSolv, ImagineTime and Rocket Matter.

Relativity: Do I need trained staff?

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

Share

Related pages

More on CosmoLex

More on Relativity

Keep looking

Other head to heads