Relex & Claude vs Box
Own your clients, your data and your firm.
Box calls itself intelligent content management, secure collaboration and agentic workflow, built for any enterprise that needs to store, share and process files. It is a content cloud, not a legal platform, and Box AI reasons over the actual documents you upload, on models Box selects for you. Relex is built for the professional who owns the client, and it makes an opposite bet about where the AI should be allowed to look. The agent gets the structure of the matter, not the file itself, and every client identity is sealed before anything reaches a model.
At a glance
| Dimension | Relex | Box |
|---|---|---|
| Where client data goes | Encrypted in your browser before anything leaves your device. The model only ever sees [Party 1]. | Content lives in Box and Box AI works over it directly, on GDPR, HIPAA and FINRA-covered infrastructure. Box states that content is not used to train external public AI models and that access respects your existing permissions, but it does not publicly describe de-identifying content before a model reasons over it. |
| Whose AI runs it | Bring your own Claude or Claude for Legal over MCP and OAuth. You own the reasoning. | Box AI taps models from OpenAI, Anthropic and Google, which an administrator selects for the organization. Box does not publicly describe letting a customer bring their own agent into the product. |
| Try it today | Sign up and run a real case in minutes. Free to try, no card. | A free trial across its business tiers, priced per user per month. Top tiers are quoted through sales, with no public per-seat figure for Enterprise. |
| Who owns the client | Partner Network: own the client and keep 100%, at 0% commission. | A content and collaboration platform. No client referral marketplace is publicly described. |
| Case structure | A formal ontology of parties, issues, claims, statutes, and facts. | Files, folders, metadata and content workflows, plus agent-built extraction templates. |
| Your know-how | A private per-tenant index the model searches. Never a copy it keeps or trains on. | Whatever you store in Box, indexed and searchable by its AI across your files. |
| Getting started | In the browser in minutes, standalone or with your own Claude. | Self-serve signup on a per-user plan, or a sales process for Enterprise. |
This comparison reflects each product’s own public positioning as of July 2026. Box is a trademark of its respective owner, and this page is an independent comparison.
The opposite bet
Box is the bet that an enterprise’s content should live in one cloud, and that AI should be pointed at all of it. Relex takes the opposite bet. The agent never gets the file. It gets an ontology of parties, issues, claims, statutes and facts, built from the file, and a private index of your know-how it can search but never keep. The document and the client’s identity stay behind that boundary, and the reasoning still runs on the Claude you already pay for, or your favorite agent.
Why the pairing wins
Point an agent at a content cloud and it can read anything permissions allow it to open, because that is what a content cloud is for. Point Claude, or your favorite agent, at Relex instead, and it never opens the file. It gets a formal case ontology built from the matter, a private know-how index it can search but never keeps, and a hard boundary in front of the documents and the client’s identity: the agent reasons over the structure, never the file itself, and any name in that structure is already a label like [Party 1].
Own the intake, own the client
A matter starts before any document exists. Clients reach your practice by email, by WhatsApp or SMS message, or through a guest link you send them, and what they tell you becomes a structured case the agent picks up without asking them to repeat it. From there Relex runs intake, drafting, native cryptographic e-signature and invoicing in one workspace. Through the Partner Network you stay the merchant of record through Stripe, at a flat $99 per month and 0% commission on what your clients pay you.
Relex is a software platform. It is not a law firm, it does not replace lawyers, and it does not provide legal advice.
Questions people ask
Relex or Box for a law firm’s confidential work?
Different jobs. Box is a content cloud built for any enterprise to store, share and run AI over its files. Relex is built specifically for a legal practice to run a matter end to end, and its agent never reasons over your raw documents or client identities directly, only over a structured ontology built from them. If you need somewhere general to store files, that is Box. If you need to run a client matter with an agent that never sees the client, that is Relex.
Does Box send my content to OpenAI, Anthropic or Google?
Box states that Box AI taps models from those providers, selected by an administrator, and that content is not used to train external public AI models. It does not publicly describe de-identifying content before a model reasons over it. In Relex, identities are encrypted in your browser under a password only you hold and documents are de-identified there, so the agent works on [Party 1] rather than the file.
Can I bring my own Claude, or another agent, to either one?
In Relex, yes. Connect Claude, or your favorite agent, over MCP and OAuth, with no key to paste, and it reasons over your matter’s ontology directly. Box does not publicly describe bringing your own model or agent into the product; model selection is an administrator setting inside Box AI.
Is Relex a document storage replacement for Box?
No, and that is not the comparison. Box stores and processes enterprise content at large scale. Relex runs a legal matter end to end, structured as an ontology the agent can reason over without ever opening the underlying file or learning the client’s name. A firm evaluating an AI workspace for client work is choosing between those two bets, not between two file stores.
More comparisons
Automate the work around the law. Stay the lawyer.
Own your clients, your data, and your firm. Start in the browser, or bring your own Claude in one step. No key to paste.