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. Irys One is $299 per seat per month. Enterprise is custom pricing. Every paid plan includes unlimited matter memory, unlimited AI queries, and unlimited chat length. No document caps, no token limits, no session resets. Full platform access for 7 days with no credit card required. Sign up and start working in under two minutes.

Reported Spellbook pricing lands around $180 per user per month for the contracts-only product. For firms that exclusively do commercial contracts and live entirely in Word, that headline is genuinely affordable.

The structural caveat is the same one that applies to every wrapper. Spellbook pays frontier-lab list rates on every query. That cost base creates pressure on pricing over time. In April 2026 Anthropic moved Claude Enterprise to per-token billing, setting the precedent across the foundation-model market. Spellbook has not introduced per-token billing yet. Current contracts can include intro discounts. Add seats, add features, or hit a renewal cycle and the math is not guaranteed to stay where it started. Wrapper economics make repricing a question of when, not if.

Irys handles contracts, litigation, research, drafting, matter management, and the Word add-in, all on one platform, at $299 per seat per month. Every module included. No usage caps, no token billing, no overage line. The proprietary infrastructure means our cost base is not tied to frontier-lab list rates the way Spellbook's is. Annual customers lock in the rate. We are the partner.

Full breakdown with methodology and sources: irys.ai/blog/real-decision-harvey-legora-claude-irys

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.