Compare · Lexis+ AI, CoCounsel, Westlaw
Barrister AI vs Lexis+ AI and Westlaw CoCounsel
LexisNexis and Thomson Reuters own the two long-standing Australian research databases, and both now sell AI on top: Lexis+ AI with Protégé, and CoCounsel with Westlaw. Here is how each compares with Barrister AI for an Australian practitioner.
Last updated 9 November 2026
In short
- Lexis+ and Westlaw AU hold deep Australian content. Their full AI tiers are mostly sold by quote, though LexisNexis also lists an A$138 Protégé plan online (without Lexis legal content).
- The research databases can be bought online without AI; adding AI generally means a conversation with sales.
- Barrister AI includes AI research in its self-serve plans, with pinpoint citations.
Side by side
Competitor details are taken from each vendor’s own pages, or from published buyer guides where the vendor publishes nothing. Checked 15 September 2026. Where a competitor matches us, the table says so.
What it costs, and who may buy it
Most legal AI is sold to firms, by the seat, on a yearly contract, at a price you have to ask for.
| What we compared | Barrister AI | Lexis+ AU | Westlaw AU |
|---|---|---|---|
| What it costsFor one practitioner, from the vendor’s own site. Where none is published, the figure is what buyer guides report. | YesA$33 a month Reader, incl. GST: pay per use. Junior Counsel and Silk plans with usage included from A$55 a month. Reading cases is free. No contract. Source: Barrister AI — Pricing | PartlyA$160 a month, no AI Lexis+ Lite, buy online. Lexis+ with Protégé is quote only; its 2026 small-firm offer excluded barristers. Source: LexisNexis Australia — online shop; LexisNexis — Protégé Small Firm Offer, Q1 2026 (PDF) | PartlyA$133 a month, no AI Westlaw AU for one practitioner, 12-month term, buy online. CoCounsel and the AI tiers are quote only. Source: Thomson Reuters — Westlaw Australia plans and prices |
| One barrister can sign up todayNo firm, no seat minimum, no yearly contract, no procurement. | Partly Lexis+ Lite online. A$138 Protégé plan online, without Lexis legal content. Source: LexisNexis Australia — online shop; LexisNexis Australia — Protégé Foundational Workflows (shop) | Partly Westlaw AU online. CoCounsel by quote only. Source: Thomson Reuters — Westlaw Australia plans and prices | |
| Pay only for the research you runA quiet month should cost less than a busy one. Seat licences do not work that way. |
Australian law, first-hand
Whether the product holds Australian law itself, or only works on what you give it.
| What we compared | Barrister AI | Lexis+ AU | Westlaw AU |
|---|---|---|---|
| Holds Australian law itselfIts own indexed set of Australian judgments and legislation — not just the files you upload. | Yes Long-standing Australian case law and legislation. Source: LexisNexis Australia — Lexis+ AI / Protégé; LexisNexis Australia — Lexis+ legislation guide (PDF) | ||
| New decisions daily, summarisedJudgments handed down yesterday, read and summarised before you start work. Not a keyword alert. | Partly Daily judgment emails. Summaries on request. Source: LexisNexis Australia — Daily Unreported Judgments Notifier | ||
| The law as it stood on a past dateFor a claim that arose in 2011, what the section said in 2011 — and only the cases that existed then. | Partly Historical versions of Acts, via LawNow. Source: LexisNexis Australia — LawNow historical versions (PDF); LexisNexis Australia — Lexis+ legislation guide (PDF) |
Where it runs
At the bar table, on the train, and inside Word.
| What we compared | Barrister AI | Lexis+ AU | Westlaw AU |
|---|---|---|---|
| iPhone and iPad appRead a judgment, check a case and search away from your desk. | No Its app is for Westlaw Edge, the US product. ProView reads eBooks. | ||
| Connects to Word and other appsSend what you have highlighted to the product, or draft inside the document itself. Most of this table does the second. | Yes Word add-in, answers in a pane inside Word. Right-click Ask Junior in Pages, Mail and PDF readers. Source: Barrister AI — Junior | ||
| Reads the brief you give itGive it the material and ask questions of it. Everyone here does a version of this. |
Where your work goes
What leaves your computer, where it is held, and how long anyone keeps it.
| What we compared | Barrister AI | Lexis+ AU | Westlaw AU |
|---|---|---|---|
| Never trains AI on your workYour documents and your questions are not used to build anyone’s model. | |||
| Hosted in AustraliaWhere the servers holding your work actually sit. | Yes Sydney: servers and database. AI model calls go offshore. | Partly Legal AI onshore. Its General AI mode is offshore. | |
| Documents stay on your computerWhether the file itself is uploaded, or read where it already sits. | Yes With Junior, our desktop app. Not saved on our servers; the file stays on your computer. Source: Barrister AI — Junior | ||
| Answers without keeping anythingWhether anything is still stored after your answer comes back. | Partly Uploads outside a Vault deleted each session. |
Evidence you can check
Most of this table publishes a benchmark. The question is what it is a benchmark of.
| What we compared | Barrister AI | Lexis+ AU | Westlaw AU |
|---|---|---|---|
| Publishes a benchmark of its ownMost of this table does. Ours is not unusual in existing — only in what it is run on. | Yes Every per-case score printed, losses included. | ||
| That benchmark is on Australian lawA score on US contract review tells an Australian barrister very little about a High Court appeal. | Yes Australian High Court appeals, hidden until judgment. | ||
| Publishes its citation checksA citation you have to verify yourself is work you have to redo. We counted ours and had a machine check them. | Yes 30.6 pinpoints a memo. 271 of 306 machine-checked, all matched. |
Databases first, AI added
Lexis+ and Westlaw are research databases with decades of Australian case law, legislation and secondary material, including commentary and looseleaf services that no new entrant holds. Their AI products, Lexis+ AI with Protégé and CoCounsel, sit on top of that content.
If you rely on a particular commentary service, you will keep a subscription. Many barristers use Barrister AI alongside one of them, for daily decisions, AI research with checkable pinpoints, and Briefs, at a lower cost than adding an enterprise AI tier.
Westlaw AI and CoCounsel
Thomson Reuters sells CoCounsel as its AI assistant, alongside Westlaw Australia. The comparison table includes Westlaw AU so you can see what is included without the AI tier and what requires a quote.
Frequently asked questions
What is Lexis+ AI in Australia?
LexisNexis’s AI research product, marketed in Australia with its Protégé assistant on top of Lexis+ content.
What is CoCounsel?
Thomson Reuters’ AI assistant for legal work, sold alongside Westlaw.
Do I still need Westlaw or Lexis if I use Barrister AI?
If you depend on their commentary or looseleaf services, yes. Barrister AI covers Australian judgments and legislation, not publishers’ secondary commentary.
General information, not legal advice. See our editorial policy for how this page is sourced and reviewed, and how to report an error.
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