Side by side
Legal Tracker and Onit Unity, side by side.
Vendor capabilities come from each vendor’s own pages. Pricing model and law firm support come from our implementation experience.
| Area | Legal Tracker | Onit Unity |
|---|---|---|
| Platform | Focused on eBilling, with its pedigree in Serengeti Tracker. Thomson Reuters’ other legal products sit alongside it, connected by integration. | Focused on matter management and eBilling, on Onit’s platform with modules such as CLM, legal service requests and Apptitude for workflow. |
| Matter management | Structured matter records with ownership, firms and budgets. | A “unified system of record” for matters and spend. |
| eBilling | Invoice intake in multiple LEDES formats, with billing rule enforcement. | ELM e-Billing that checks invoices against billing guidelines. |
| AI invoice review | Legal Tracker AI: detects billing anomalies and checks compliance. | Spend Agent: AI invoice review with an approve or reject rationale and an audit log. |
| Analytics | Dashboards, plus benchmarking in Legal Tracker Advanced. | Ask Unity conversational analytics. |
| Choosing firms | Matter pricing and RFP in Legal Tracker Advanced. | CounselMatch for outside counsel search; Unity RFP announced. |
| Law firm onboarding and support | Firms are onboarded into your own instance, so your team supports them. | Firms submit invoices through Counsel Exchange, and Onit supports them. |
| Pricing model | Quoted. Users and legal spend; modules cost extra. | Quoted. Platform and legal spend; modules cost extra. |
From the Legal Tracker and Onit Unity pages and Onit’s March 2026 announcement, October 2026. Features vary by edition; confirm with each vendor.
Which tends to fit
Which one tends to fit when.
These are tendencies. The answer comes from your requirements, volumes and the systems around the platform.
Legal Tracker tends to fit when
Your main need is eBilling and spend control, your workflows are stable, and your team is ready to support its own law firms. It serves mid-market and enterprise departments, which is part of why it is so widely deployed.
Onit Unity tends to fit when
You want matters, spend, intake and workflow on one platform, with AI in invoice review and analytics, and you want the vendor to support your law firms. Unity is the future direction of Onit’s platform: SimpleLegal customers are being upgraded to Unity.
Moving from Legal Tracker to Unity
What a move from Legal Tracker to Onit Unity involves.
01
Matter and invoice history
Decide what moves live, what is archived and what stays reportable.
02
Firms, timekeepers and rates
Clean the vendor list and approved rates before they move.
03
Billing guidelines and rules
Rebuild the rules on the new platform and test them on real invoices.
04
Integrations
Accounts payable and single sign-on are mandatory; reconnect anything else you rely on.
05
Law firm cutover
Tell firms when and where to submit, and support them through the first cycles.
Our professionals have led transitions off Legal Tracker for clients whose operational model or scale outgrew it, and have implemented Legal Tracker for clients who needed a stable spend control platform.
How we help
How we help.
01
Evaluate both with one firm
Requirements, scripted demos and a side-by-side cost of Legal Tracker and Onit Unity.
02
Implement either
We implement both, led by three Onit Level 4 certified practitioners on the Unity side.
03
Stay and optimize
If Legal Tracker is the right answer, we administer and improve it.
Who you work with
The practitioners who run the comparison.
Hafid Karama
Business Intelligence, PM, and Legal Ops
Builds the reporting and dashboards on ELM data, and supports Legal Tracker administration and reporting. Previously at Kroll and Duff & Phelps.
Sam Lu
Senior Advisor, Legal Technology
Onit Level 4 certified. Has led ELM implementations for global enterprise legal departments across North America, with delivery across Onit, Mitratech and large-scale legacy migrations.
Frequently asked questions
Is Onit Unity a replacement for Legal Tracker?
It can be. Legal Tracker focuses on eBilling, with its pedigree in Serengeti Tracker. Onit Unity is focused on matter management and eBilling, adds intake, workflow and AI on one platform, and Onit supports your law firms through its own portals. Whether to move depends on how far beyond eBilling your department needs to go and the cost of migration.
Which has better AI invoice review, Legal Tracker or Onit Unity?
Both offer it. Legal Tracker AI detects billing anomalies and checks compliance. Onit Unity’s Spend Agent reviews invoices with an approve or reject rationale and an audit log. Test both on a sample of your own invoices against your billing guidelines.
How long does a move from Legal Tracker to Onit Unity take?
It depends on the matter and invoice history you move, the number of law firms, and your integrations. Accounts payable and single sign-on integrations are mandatory and should be planned from the start. We scope the timeline in the first conversation.
Can we evaluate Legal Tracker and Onit Unity with one partner?
Yes. Swiftwater implements both Legal Tracker and Onit Unity, and is a certified Onit implementation partner. We say so up front and compare the two on your requirements.
What does Onit Unity mean for SimpleLegal customers?
Onit is upgrading SimpleLegal customers to Unity through what it calls Activation: a Unity sandbox that mirrors the SimpleLegal setup first, then an automatic transition on a scheduled date. Confirm timing with Onit; we can help plan it.
Comparing Legal Tracker and Onit Unity? Talk to a practitioner.
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