Marking up a contract draft with proposed changes — deletions in strikethrough, additions underlined — during negotiation; AI tools now generate suggested redlines based on a firm's playbook.
Last reviewed: 2026/05/19
AI identification of contract clauses deviating from a firm's standard position, flagging for review; requires a configured playbook defining what 'standard' is.
CapabilityAI tools that assist contract negotiation by suggesting redlines, explaining counterparty language risks, or drafting counter-proposals based on the firm's playbook.
Legal PracticeAlternative contract language pre-approved by legal for use when a counterparty rejects preferred terms, codified in a playbook for AI-guided negotiation.
AI contract drafting and review inside Microsoft Word for transactional lawyers.
Contract review and negotiation AI platform for in-house legal teams, backed by US and UK law firm expertise.
Document comparison tool that visually highlights differences between contract versions for legal review.
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Last reviewed: 2026/05/19. Definitions are written by the LawyerAI Editorial team. Commercial relationships are disclosed and do not determine editorial scores or conclusions. See our Sponsorship & Affiliate Disclosure.
Redlining is the process of marking up a contract document with proposed changes during negotiation — typically showing proposed deletions with strikethrough text and proposed additions with underlined or colored text. The term derives from the red ink historically used on paper contracts to indicate proposed changes. In modern practice, redlining occurs in word processors using track changes functionality. AI tools now generate suggested redlines automatically based on a configured playbook — identifying counterparty language that deviates from standard positions and proposing alternative language drawn from the firm's preferred provisions — accelerating the initial markup phase of negotiation.
Producing a first redline of a counterparty's agreement draft is a routine but time-intensive task. An experienced associate reviewing a 30-page service agreement and producing a comprehensive redline against the firm's standard positions may take three to four hours. AI-assisted redlining can produce a first-pass markup in minutes, which the lawyer then reviews, refines, and supplements with judgment calls that the AI cannot make.
The time savings multiply at scale. A transactional practice reviewing and marking up dozens of vendor agreements per month can compress significant associate time investment through AI redlining assistance.
AI redlines are starting points, not final work product. The AI marks positions based on playbook rules; it does not understand the commercial context, the relationship dynamics, the client's risk tolerance for a specific deal, or the counterparty's likely response to various positions. The lawyer applies these judgments to refine the AI-generated markup before sending.
Spellbook integrates redlining assistance directly into Microsoft Word, suggesting clause-level edits based on configured standard positions without requiring lawyers to leave their drafting environment. Suggested redlines appear as track changes that the lawyer accepts, modifies, or rejects.
Robin AI offers AI-generated redlines based on playbook configuration, with explanations for each suggested change that help lawyers understand the basis for the AI's position and communicate it to counterparties. Draftable provides document comparison functionality that supports the redlining process by clearly visualizing changes between contract versions.