Lexis+ AI Protégé: Pricing, Cost, Vault Limits, and Alternatives
What LexisNexis actually publishes about Protégé, what it refuses to publish, and how the numbers compare with the one incumbent AI tier that does show a rate.
How courts have ruled
Sample results, illustrative only. Informational research, not legal advice. Verify every citation.
In short
Lexis+ with Protégé is the generative and agentic AI assistant LexisNexis sells on top of its Lexis+ research platform, covering conversational research, drafting and redlining, summarization, and workflow automation, with Shepard's as the citator. As of July 2026 LexisNexis publishes no price for it, stating only that cost varies by organization size, capabilities required, and content scope. Third parties report roughly 128 to 494 dollars per user per month for smaller firms and 500 to 1,000 dollars or more for full access, none of it confirmed by LexisNexis. The trial is 2 days for Protégé against 7 days for base Lexis+, so the AI tier gives you less time to evaluate than the product underneath it. If the job you need done is finding the on-point case, Cases does that for a published 29 dollars per month with no sales call. This is informational research, not legal advice, and you should always read the case before citing it.
Last updated July 2026
What LexisNexis puts in writing
What Protégé does, and what the vendor commits to
Most write-ups about Protégé restate the marketing copy. The more useful exercise is separating the capabilities LexisNexis names on its own page from the ones where it also publishes a hard number, because a published number is something you can hold a vendor to and a capability name is not.
| Capability | What it does | What is published |
|---|---|---|
| Protégé AI assistant | LexisNexis describes it as a personalized generative and agentic assistant covering conversational legal research, drafting and redlining, document summarization, and workflow automation. | Named on the product page |
| Grounded legal research | Answers are grounded in your organization's knowledge, LexisNexis licensed content, and web sources. The vendor claims grounding, not freedom from hallucination. | Named on the product page |
| Shepard's Citations | Validates citations and confirms the status and treatment of authorities. This is the citator, and it is the piece of the Lexis stack that has no cheap substitute. | Named on the product page |
| Vault | Private document workspaces the assistant can reason over. LexisNexis publishes the limit: up to 50 Vaults, holding 1 to 500 documents each. | Limit published: 50 Vaults, 1 to 500 docs each |
| Pre-built workflows | Packaged routines for everyday drafting, review, research, and litigation preparation, so common tasks do not start from an empty prompt box. | Named, count not published |
| AI agents | Multi-step work with visibility into progress, aimed at complex tasks that need planning rather than a single answer. | Named, scope not published |
Capabilities and limits read from the LexisNexis Lexis+ AI product page as of July 2026. Note the pattern: the only hard figures LexisNexis publishes anywhere on the page are the Vault limits and the trial length.
Published, reported, and guessed
What you can actually verify about Protégé pricing
Here is the whole incumbent field sorted by whether a vendor page will confirm the figure. Sorting it this way surfaces something the individual product pages hide: of the major legal AI tiers a US firm is likely to shortlist, exactly one publishes a rate you can read without talking to anybody.
| Product | Figure | Status | Where it comes from |
|---|---|---|---|
| Lexis+ with Protégé | No figure shown | Quote only | LexisNexis states pricing varies by organization size, capabilities required, and content scope |
| Lexis+ with Protégé, small and mid firms | 128 to 494 dollars per user per month | Reported | Third-party write-ups, not confirmed on any LexisNexis page |
| Lexis+ with Protégé, full access | 500 to 1,000 dollars per user per month | Reported | Aggregator estimates, treat as somebody else's negotiated deal |
| CoCounsel Legal | No figure shown | Quote only | Thomson Reuters plans page routes to sales above 10 attorneys |
| Westlaw Advantage, single circuit | 256.75 dollars per user per month | Published | Thomson Reuters sales site, Westlaw Advantage plans and pricing |
| Westlaw Advantage, all states plus federal | 399.75 dollars per user per month | Published | Same Thomson Reuters page, firms up to 10 attorneys |
| Paxton AI | 499 dollars per user per month | Published | Paxton AI pricing page |
| Harvey | No figure shown | Quote only | No published rate anywhere on the vendor site |
| Cases | 29 dollars per month | Published | Our own pricing page, self-serve, no sales call |
There is a practical asymmetry buried in that table. A CoCounsel Legal quote can be sanity checked, because CoCounsel Legal contains full Westlaw Advantage and Westlaw Advantage sold alone has a published small-firm rate, which puts a visible floor under the conversation. A Protégé quote has no such anchor. Nothing in the LexisNexis lineup is published, so the first number you hear is the only reference point you will have. Ask what a Lexis+ seat costs without Protégé before you discuss the bundle, or you are negotiating blind. Our CoCounsel Legal breakdown works through that floor, and LexisNexis legal research covers the platform Protégé sits on.
The one number everybody publishes
How long each vendor gives you to evaluate
Since most of this market refuses to publish pricing, trial length is the only figure that can be compared like for like across vendors. It is also more revealing than it looks. How long a vendor is willing to let you use the product unsupervised tells you something about how quickly they expect it to sell itself.
| Product | Published trial | What that tells you |
|---|---|---|
| Lexis+ with Protégé | 2 days | The AI tier gets a shorter window than the base product it sits on. |
| Lexis+ (base platform) | 7 days | Research, Practical Guidance, and data-driven insights, no credit card required. |
| CoCounsel Essentials | On request | No fixed length published; a trial is requested rather than started. |
| Paxton AI | 7 days | Published alongside a published per-seat rate. |
| midpage | 2 weeks | The longest published evaluation window in this group. |
| Cases | No trial, 29 dollars per month | Month to month at a published price, so evaluating costs one month rather than a signature. |
The Protégé number is the one worth pausing on. LexisNexis offers 7 days on the base Lexis+ platform and 2 days on the AI tier that sits on top of it. Whatever the reason, the practical effect on a buyer is real: two days is a demo, not an evaluation. You cannot put a genuinely contested research question through a tool, wait for the answer to matter, and form a view inside forty-eight hours. If you go down this route, book the trial for a week when you already have a live matter to test it against, and know your questions in advance.
The comparison buyers actually run
Protégé against CoCounsel, honestly
These two are the real shortlist for most US firms evaluating incumbent legal AI, and on features they have converged almost completely. Both do conversational research over licensed primary law. Both draft and redline. Both analyze document sets, run multi-step agentic tasks, and integrate with Word. Feature-comparing them is largely a waste of an afternoon.
What actually differs is the library and the citator underneath. Protégé reasons over LexisNexis content and validates with Shepard's. CoCounsel reasons over Westlaw primary law plus Practical Law guidance and validates with KeyCite. If your firm has twenty years of muscle memory in Shepard's signals, moving to KeyCite is a real retraining cost that no feature grid will show you, and the reverse is equally true. That, far more than the AI layer, is what should decide it.
Worth knowing about both citators before you treat either as settled: Paul Hellyer's study in the Law Library Journal, volume 110, reviewed 357 citing relationships and found that Shepard's and KeyCite each missed or mislabeled about one third of negative citing relationships. Neither is a rubber stamp. That finding is old enough to predate the current AI tiers and it has not been superseded, which is why the professional habit of reading the case yourself has survived every product generation so far. Our KeyCite and Shepard's comparison goes through the study in detail.
Match the spend to the practice
Who should buy Protégé, and who is overbuying
Firms already standardized on Lexis and Shepard's
This is the clearest yes. You license the content, your associates know the signals, and Protégé is an interface upgrade rather than a platform migration. Negotiate it as an add-on to a renewal you were signing anyway, which is a much stronger position than buying it cold.
Teams whose week is drafting and redlining
The drafting, summarization, and Vault features are doing work a search tool genuinely cannot do. If contract review and first drafts are a real share of billable time, an assistant sitting on licensed content is defensible spend.
Litigation teams with large document productions
Check the Vault ceiling before you sign. Fifty Vaults at 1 to 500 documents each caps you at 25,000 documents, which is comfortable for most small firms and tight for a team in heavy discovery. It is a published limit, so raise it early.
Solos and small firms doing mostly case finding
This is the overbuy. If your actual daily task is locating the on-point authority and citing it, the reported entry range for Protégé is several times what focused case law search costs, and nearly all of the difference is work product tooling you will not open.
Anyone who has not priced the bar association option
Before paying for anything, check your state bar. A large number of US bars include a Fastcase or vLex library in dues you already pay, and it comes with case law search and the Authority Check citator. For a solo practice that is sometimes the entire answer, and no vendor is going to volunteer it.
Unbundle the two jobs
If what you need is the research half
Legal research is two jobs the incumbents sell as one: finding the on-point authority, and confirming it is still good law. The quoted tiers bundle both together with a drafting suite, a document workspace, and an agentic workflow engine, and price the whole thing as a platform. If you only need one of those jobs done, you are still paying for all of them.
For the finding half, Cases takes a legal question in plain English and returns on-point US federal and state precedents as headnote cards, each with the holding surfaced and a real citation. Pricing is published at 29 dollars per month, month to month, with no quote and no sales call. For the validating half, run the citation through whatever citator you have access to, which for a lot of US lawyers is the Authority Check included with a bar-provided library. Our citator comparison lays out every option and what each one costs.
We are not claiming this replaces Lexis+ with Protégé. It does not draft your motions, it does not redline a contract, it has no Vault, and we are not a citator. What it does is the search half, at a published price you can read right now. If you are verifying a citation somebody else produced, the case citation checker walks through confirming a case is real before you file it, and our LexisNexis alternative comparison concedes where LexisNexis genuinely wins.
Questions buyers ask
Lexis+ AI Protégé, answered
What is Lexis+ AI Protégé?
Protégé is the generative and agentic AI assistant LexisNexis layers on top of the Lexis+ research platform. LexisNexis describes it as a personalized assistant that handles conversational legal research, drafting and redlining, document summarization, and workflow automation, grounded in your organization's own knowledge alongside licensed LexisNexis content and web sources. The important structural point is that Protégé is an assistant over a content library, not a separate library. What you are really buying is Lexis content with an AI interface on it.
How much does Lexis+ AI Protégé cost?
LexisNexis publishes no rate. Its own page states that pricing varies based on the size of your organization, the specific capabilities required, and the scope of content access, and directs you to contact sales. Third-party sources report roughly 128 to 494 dollars per user per month for smaller firms and 500 to 1,000 dollars or more for full access, but no LexisNexis page confirms any of those figures. Treat every published Protégé number you find online as somebody else's negotiated deal rather than a rate card.
Is Lexis+ AI free?
No. There is no free tier, and the trial is unusually short: LexisNexis advertises a 2-day free trial for Lexis+ with Protégé, against 7 days for the base Lexis+ platform. Two days is enough to watch a demo workflow, not enough to run it against a live matter. If cost is the real constraint, check your state bar association first, because a large number of US bars include a Fastcase or vLex library in dues you already pay, and that comes with case law search and the Authority Check citator.
Is Protégé included in Lexis+?
Not automatically. Lexis+ is the base research platform, covering federal and state case law, statutes, Shepard's, and Practical Guidance. Protégé is the generative tier sold on top of it, which is why LexisNexis brands the combined product Lexis+ with Protégé rather than just Lexis+. If you already subscribe to Lexis+ and want the AI assistant, that is an upgrade conversation with a separate price, and the separate 2-day trial is a decent signal that it is sold as its own line item.
Lexis+ AI Protégé vs CoCounsel: which is better?
They are close enough in capability that the honest deciding factor is which content library you already trust. Protégé reasons over LexisNexis content and uses Shepard's as its citator; CoCounsel Legal reasons over Westlaw primary law and Practical Law, and uses KeyCite. Both do drafting, document analysis, and agentic multi-step research. Neither publishes a price. The practical difference is that Thomson Reuters publishes a rate for Westlaw Advantage, which CoCounsel Legal contains, so a CoCounsel quote has a visible floor underneath it and a Protégé quote has nothing at all.
What is Lexis Protégé Vault?
Vault is the private workspace where you upload your own documents so the assistant can reason over them alongside published law. LexisNexis publishes the limit, which is rare enough to be worth quoting: up to 50 Vaults, each holding 1 to 500 documents. That works out to a ceiling of 25,000 documents across the account. For most small firms that is generous, and for a litigation team with a large document production it is a real constraint worth raising before you sign.
Does Lexis+ AI hallucinate?
LexisNexis claims its answers are grounded in authoritative sources and that citations can be verified for validity, status, and treatment. It does not claim to be hallucination free, and that distinction matters. Grounding reduces fabrication, it does not eliminate it, and US courts have sanctioned lawyers for filing briefs containing invented citations produced by AI tools. Whatever platform you use, read the case before you cite it. That is the professional obligation regardless of which vendor produced the citation.
Is Lexis+ AI Protégé worth it?
It is worth it if your week genuinely includes drafting, redlining, and document review, and if you are already committed to Lexis content and Shepard's. In that situation you are paying for an interface to a library you already license, which is a defensible spend. It is poor value if what you actually do all day is find the on-point case and cite it. In that case you are buying a large work product suite, a document workspace, and an agentic workflow engine to reach a search box, and the quote will reflect all of it.
Keep researching
Find the case without the quote
Ask your question in plain English and get on-point US precedents with a real citation. Published pricing from 29 dollars per month, no sales call. Informational research, not legal advice, always verify the citation.