Word-native contract AI — or a platform that connects the whole legal workflow?

Spellbook lives entirely in Microsoft Word. If you do not use Word, Spellbook does not work. There is no standalone platform, no browser-based workspace, no independent matter management. Every document exists individually inside Word with no cross-document context, no matter organization, and no shared workspace.

Irys One is a standalone platform that works regardless of your document editor. And for lawyers who do live in Word, the Irys Word Add-In brings the full power of the platform — research, cite check, drafting — directly into Word without losing the matter context behind the work.

Spellbook is built for commercial contract lawyers. Their own qualification form explicitly filters out litigation lawyers — if you select litigation, you are routed away from the product. No case law research. No 50M+ citation database. No Cite Check. No Deep Research. No memo-quality research reports.

Irys covers every practice area: litigation, corporate, regulatory, employment, insurance defense, mass tort, immigration, and more. If your firm does anything beyond contract review, Spellbook leaves you without coverage for your largest workflows.

Spellbook publicly states it is powered by GPT-5 and Opus. That means it is a layer on top of OpenAI and Anthropic APIs — the same wrapper architecture that drives up cost and limits control. They do not control their AI infrastructure.

Irys One runs on a proprietary three-tier AI architecture designed specifically for legal analysis. Your data never leaves the Irys environment. No data is used for model training. The infrastructure is purpose-built, not rented.

Spellbook hides all pricing behind a demo booking form. Even a two-person firm has to book a sales call to learn what it costs. Their 7-day trial requires a business email, a qualification form, and routing through a sales team.

Irys publishes pricing on the website. Solo is $299/month. Teams is $349/seat/month. Full platform access for 14 days with no credit card required. Sign up and start working in under two minutes.

If your firm only does commercial contracts, only uses Word, and is comfortable with hidden pricing and a sales-gated trial — Spellbook is a focused tool for that narrow use case.

If your firm handles litigation, research, multiple practice areas, or wants a connected platform where drafting, research, and matter management share the same context — Irys is built for the larger problem. One platform, every workflow, transparent pricing, and instant access.