Any AI can mark up a document. The question is whether you can send that markup to a counterparty without spending an additional hour on cleanup.
In head-to-head trials, legal teams consistently choose Ivo on exactly that test.
Most AI tools redline by replacing whole passages, resulting in a sea of redlines. It's technically correct, but produces the kind of markup that needs to be redone by a human attorney.
Ivo edits the way a lawyer does. It makes the smallest change that does the job, with tracked changes that read like a human lawyer made them.
Even the smartest general-purpose AI becomes a brilliant attorney with amnesia. It reads the document in front of it with no knowledge of your playbook, your fallbacks, or the last hundred versions of this agreement you negotiated.
Ivo reviews with the context an experienced in-house lawyer carries into every markup.
Every Ivo playbook is built with trained lawyers to reflect your organization's actual standards, then applied the same way on the five hundredth contract as on the first.
Automatically surface how your organization has negotiated in the past so your team can make faster, data-backed decisions.
A great lawyer reads the whole agreement at once. Ivo does the same, assigning an AI agent to each topic and a superior agent above them to reconcile overlapping findings.
You get one clean recommendation per topic, with the reasoning and source behind each one.
Ivo's redlines are derived from your custom-built playbook and negotiated precedents, making the smallest edit that does the job.
Spellbook generates redlines from general risk identification and market term analysis. Teams comparing both cite how cleanly Ivo redlines against clunkier paragraph replacements.
Every Ivo playbook is built and maintained by in-house contract attorneys who encode your positions, fallback language, and escalation paths.
Spellbook offers self-serve playbooks and clause libraries powered by AI preference learning.
Spellbook's Compare to Market benchmarks against its aggregated corpus.
Ivo benchmarks every clause against your own negotiated portfolio as well as external market data, so the context reflects how you actually negotiate.
Spellbook has no repository or portfolio intelligence.
Ivo turns executed agreements into a living intelligence layer that feeds directly back into redlining, a closed loop between what you've negotiated and how your team negotiates next.
Ivo deployments come with white-glove implementation, dedicated success managers, and in-house attorneys who build and maintain your playbooks.
Spellbook's self-serve model suits solo practitioners and small firms; its customer base reflects that.
Ivo makes targeted edits an attorney would make and holds up on complex agreements, not just NDAs.
In evaluations against both tools, enterprise legal teams chose Ivo on ease of use and accuracy of markup.
Ivo's playbooks are built with your team by practicing contract attorneys, and you can edit them yourself from day one.
Luminance's AI-generated playbooks are configured and maintained by Luminance's own specialists.
Ivo benchmarks clauses against your own negotiated precedents. Ask "have we accepted this before?" and get an answer from your portfolio, not a global template.
Luminance offers a repository.
Ivo's difference is the closed loop: Benchmarks and negotiating history inform every redline recommendation, with source attribution on each one.
Luminance sells its entire platform as one bundle on multi-year terms.
Ivo is modular and usage-based: start with Review, add Intelligence when you're ready, with implementation run by our legal engineering team in weeks.
In a blind study of 19 contracts judged by three attorneys, Ivo outperformed Claude for Word on every criterion, with the largest gaps in surgical redlining and judgment.
On one assignment clause, judges scored Ivo's precise insertions 7 out of 10 and Claude's full-clause rewrite 2.
Claude has no playbook system. Standards live in prompts that vary by user and by day. Ivo applies your playbook the same way on the five hundredth contract as on the first.
Claude cannot tell you whether you've accepted a position before.
Ivo answers that from your executed portfolio, with the frequency and the fallbacks you've used.
Claude sees what you paste into the context window. Every review starts from zero.
Ivo reviews with your repository, benchmarks, and negotiation history behind it.
Claude is a capable assistant many teams already have, and Ivo runs on frontier models itself.
What Claude lacks is the contracting scaffolding: playbook implementation, legal engineering support, review workflows, and an audit trail built for legal work.
Legal Operations
Enterprise Identity Security Company
Director of Legal Operations
Major North American Bank
Evaluation lead
Fortune 500 Company, after a head-to-head trial against Harvey
Find out why Ivo is the #1 choice for Fortune 500 teams today.
