Legal & Contracts
SaaS, open source and skills for legal & contracts work — with the limits of each written down.Before you pick
What decides it
Whose paper you review decides this: your own templates with written fallback positions suit playbook tools; incoming third-party drafting rewards a copilot plus research.
What to avoid
Nothing flagged means the clause is fine, missing, or simply not found; the report looks identical in all three cases.
What is changing
These tools are moving past detection into disposition: applying the playbook, clearing low-risk agreements unaided, escalating exceptions, and logging who decided what.
SaaS
Hosted products you sign up for.Leading
Established picks, at the top of today's aggregate.
- 1SpellbookWord-native drafting and review co-pilot favored by transactional lawyers and in-house counsel doing high volumes of commercial agreements.
- 2LegalOnAttorney-built playbooks in Word for in-house teams that want fast, standardized contract review with pre-approved positions.
- 3HarveyEnterprise legal AI for large law firms — research, document analysis and contract review at scale via conversational queries.
- 4Thomson Reuters CoCounselResearch and document review deeply integrated with Westlaw and Practical Law for firms already in the Thomson Reuters stack.
- 5DefinelyIn-Word review and negotiation assistant for teams handling complex contracts where context and definition-tracking matter.
Emerging
Newer challengers, surfaced by two or more sources.
- 1ReferentPractice-management platform where AI agents run intake, email filing, deadlines and billing prep for law firms, with lawyers approving each action.
- 2HAQQ Legal AI on MobilePhone app that explains uploaded contracts in plain language with risk flags, and answers questions against 80+ jurisdictions in 20+ languages.
- 3AI Compliance AdvisorPaste a plain-language description of your business and get a prioritised checklist of GDPR, CCPA and EU AI Act obligations.
- 4TermsyChrome extension that scans the terms of service or privacy policy on the current page and lists its notable clauses in a sidebar.
- 5Draftwise Playbook StudioTurns a legal team's past negotiations into a written playbook, then checks new contracts against those positions; built for law firms and in-house counsel.
Open source
Repositories you run yourself.Leading
- 1OpenContractsThe most-starred open-source contract/legal-document platform (~1.4k★): annotate, analyze and run LLM extraction over contracts — the closest OSS analog to the AI contract-review apps above.
- 2docassembleThe recognized open-source legal document-assembly platform (~1k★, used by courts and legal-aid orgs): guided interviews that generate contracts, court forms and letters from user input.
- 3Accord Project (Cicero)Linux Foundation project for smart legal contracts (~0.4k★): templates that bind natural-language clauses to a data model and executable logic. Niche but the de-facto open standard.
- 4open-agreementsSmall but on-point niche tool: fills standard legal agreement templates (Common Paper, Bonterms, Y Combinator) and outputs signable DOCX files.
Emerging
- 1evolsb/claude-legal-skillReviews a pasted contract from your side of the deal, flagging risky clauses against market benchmarks and emitting structured redlines.
- 2zubair-trabzada/ai-legal-claudeClaude Code skill pack scoring contracts 0-100 and drafting NDAs and policies, aimed at freelancers and agencies reselling legal work.
- 3Vaquill-AI/ms-word-addinWord task-pane add-in that redlines, drafts and researches inside the open document using tracked changes; runs hosted or on your own API keys.
- 4kcass16/kevinAgent skill for AI startups: contract gap analysis, EU AI Act risk classification, data processing addenda and internal AI-use policies.
- 5xkaluv/harveyClaude Code skill that splits legal work across paralegal, researcher and partner agents, with CourtListener case law and Word redlining.
Skills
Skills you drop into a coding agent.Leading
Nothing here we could place with confidence.Emerging
- 1evolsb/legal-redline-toolsTurns a .docx plus a JSON list of changes into tracked-changes Word files, redline PDFs and internal negotiation memos.
- 2sungjunlee/beopsuny-skillClaude Code skill for Korean law, pulling statutes and court precedents from local mirrors and law.go.kr, with verification tags to curb hallucination.
- 3code-lawyer/Legal-Agent-Skills
- 4Hylouis233/mcodeforlegal
- 5SkillMedev/legal-team-starterThree Claude skills installed through the Skill Me MCP: regulatory scanning, SaaS terms drafting and employment-contract review for founders without counsel.