Proviso does one thing: helps in-house transactional lawyers review contracts faster and catch more issues — without leaving Microsoft Word.
Proviso isn't a general legal AI. It's a focused contract review tool for transactional in-house lawyers — built by one, used by them.
Open an NDA, vendor MSA, SaaS agreement, or M&A document — Proviso identifies it and applies the right review playbook automatically. No configuration needed.
Bring your own LLM API key — Proviso works as an intelligence layer on top of leading AI models. We never store your contract text, and your chosen LLM provider's data policies apply directly to you.
No browser tab switching. No copy/paste. Proviso runs as a Word add-in — open the taskpane, click Review, and get a structured risk assessment without leaving your document.
Built on thousands of real NDAs, vendor agreements, SaaS contracts, and acquisition documents sourced from public SEC filings. Constantly expanding. Understands indemnification caps, auto-renewal traps, and liability carve-outs — the issues that matter in deal work.
Beyond review — draft fallback clauses, suggest redlines on specific provisions, and compare two contract versions side-by-side. Everything stays inside the contract you're working on.
The Ask tab lets you ask free-form questions about the open document. "What's our termination exposure?" "Summarize this for the CFO." Get answers in plain English in seconds.
Every in-house legal team negotiates NDAs differently. NDA Calibrate lets you teach Proviso exactly how you work — upload 3 NDAs you've negotiated and like, answer a few questions about your positions, and Proviso builds a personalized review playbook from your preferences.
From that point on, every NDA review reflects your standards. Flags provisions that don't belong — non-solicits, IP grabs, residuals clauses — the stuff that slips into NDAs and shouldn't. Not generic best practices. Not some outside counsel's template. Yours.
No IT department required. No annual contract. No vendor lock-in.
Open any contract document in Microsoft Word — existing files, email attachments, scanned PDFs. No special format required.
Open the Proviso taskpane in Word and click Review. Proviso reads your document and sends it to Claude's API with your key. Nothing stored on our end.
Receive a structured risk table with severity ratings, plain-English explanations, and specific negotiation recommendations. Ready in under 60 seconds.
Each playbook is a purpose-built framework, not a generic prompt. Select by contract type or let Proviso auto-detect.
Most legal AI tools send your contracts to their servers. Proviso doesn't. Here's exactly what happens when you run a review.
Use your own LLM API key — stored only in Word's local settings, never on Proviso's servers. You control costs and your direct relationship with your AI provider.
Proviso's backend routes your request to Claude's API. We don't log, cache, or store contract text. Nothing is retained after the response is returned.
Leading LLM providers do not train on API-submitted data by default. Enterprise DPA coverage available. Your contract data is not used to train AI models.
Our contract database grows continuously — built from publicly available documents in SEC filings and public records. More contracts means better pattern recognition on the issues that matter to in-house teams.
See what Proviso saves compared to outside counsel — or just doing it yourself.
The platforms built for in-house lawyers charge enterprise prices. Proviso is the only one built for transactional practitioners — with BYOK, M&A depth, and no vendor lock-in.
| Feature | Proviso | GC AI | Spellbook | Harvey |
|---|---|---|---|---|
| Works inside Microsoft Word | ✓ | ✓ | ✓ | ✓ |
| Bring your own API key — pay your provider directly | ✓ | — | — | — |
| Pre-built playbooks: NDA, LOI, SPA, IP License | ✓ 24+ | Limited | Limited | ✓ |
| Thousands of real contracts from public SEC filings | ✓ | — | — | Partial |
| Learns your organization's redline standards | ✓ | — | — | — |
| Built for in-house lawyers (not law firms) | ✓ | ✓ | — | — |
| Starting price | $49/mo (BYOK) | $500/user/mo | $179/user/mo | $1,000+/user/mo |
Flat rate. Bring your own API key. Pay your LLM provider directly for usage — that's usually a few dollars a month.
Built for in-house transactional lawyers who review a lot of contracts and want to do it faster, without switching tools.
We're onboarding early users now. Drop your email and we'll send install instructions within 24 hours.