Source: https://bestagentsfor.com/ja/ai-agents-for/legal/ Markdown: https://bestagentsfor.com/ja/ai-agents-for/legal/index.md Title: おすすめの法律AIツール (2026) | Best Agents For - ホーム - /エージェント - /おすすめの法律AIツール # おすすめの法律AIツール 法律AIは契約を読み、判例を探し、出典つきで下書きします。Harvey、Spellbook、CoCounselは消費者向けの弁護士ではありません。事務所向けの価格は個別が多いです。 10 製品。料金と説明の確認日は 2026年10月5日。 ## おすすめの法律AIツール の比較 価格は各社が公開している開始価格です。無料プランや試用は、価格ページに書いてあるときだけ載せます。 製品 料金 無料プランまたは試用 主な機能 連携 向いている用途 利用者の声 #1 Not published 記載なし AI platform for law firms and in-house legal teams. SAML SSO Large law firms and corporate legal departments running high-stakes work on one platform. r/biglawの訴訟担当は、事務所が公開チャットボットを許さないとき、Harveyは顧客仕事に足り、校正と矛盾の確認に触れる、と書いています。 #2 Not published 記載なし Collaborative AI and an agentic operating system for legal work. Microsoft Word, Microsoft Outlook Law firms and in-house teams that want agentic workflows across research, review, and delivery. r/legaltechのある比較は、小さい事務所にはLegoraのほうがHarveyより易しく見えた、と書いています。 #3 Not published 試用 AI for contract review, drafting, and playbooks in Word. Microsoft Word, Email, Slack Law firms and in-house teams that negotiate contracts in Microsoft Word. Harveyを離れて小さめの道具に移ったr/biglawのコメントは、着地先の一つにSpellbookを挙げています。 #4 $499 per user/month 記載なし Litigation workspace for matter files, research, and drafts. DMS, Claude, Microsoft Word, Microsoft Outlook Litigation attorneys and small firms that want research and drafts tied to the case file. 出典付きのコメントはありません。 #5 From $49/user/mo 試用 Legal practice management with AI on Core plans and above. Gmail, Microsoft Outlook, QuickBooks, Xero Law firms that want practice management, billing, and matter-aware AI in one system. 出典付きのコメントはありません。 #6 Not published 記載なし Thomson Reuters AI for legal, tax, audit, and compliance work. Westlaw, Practical Law, Checkpoint, Microsoft 365 Firms and professional teams that want AI tied to Westlaw, Practical Law, or Checkpoint. r/biglawの同じコメントは、日常の起草でHarveyの席を置き換えた小さめの道具の一つとしてCoCounselを挙げています。 #7 Not published 試用 Legal AI for research, drafting, and analysis, now branded with Protégé. Shepard's Attorneys who want drafting and research grounded in LexisNexis authority and Shepard's. 出典付きのコメントはありません。 #8 Not published 記載なし AI operating system for plaintiff law firms. CMS Personal injury and other plaintiff firms that want intake, medical review, and drafting in one system. 出典付きのコメントはありません。 #9 Not published 記載なし Proactive AI across the personal-injury case lifecycle. CMS Personal injury firms that want demands, medical review, and negotiation support from case files. 出典付きのコメントはありません。 #10 Not published 記載なし Contract intelligence for legal, procurement, finance, and the wider enterprise. None named on the pages we opened Enterprises that want contract review and portfolio insight beyond the legal department. 出典付きのコメントはありません。 ## ランキング 仕事への適合、自律性、制御、連携、始めやすさ、情報の公開度で並べています。 # エージェント 向いている用途 料金 無料プラン 自律度 連携 スコア 1 Harvey Large law firms and corporate legal departments running high-stakes work on one platform. Not published なし Semi-autonomous SAML SSO - Fit for the job29/30 - Autonomy13/20 - Controls12/15 - Integrations6/15 - Access4/10 - Evidence9/10 2 Legora Law firms and in-house teams that want agentic workflows across research, review, and delivery. Not published なし Semi-autonomous Microsoft Word, Microsoft Outlook - Fit for the job28/30 - Autonomy13/20 - Controls12/15 - Integrations7/15 - Access4/10 - Evidence9/10 3 Spellbook Law firms and in-house teams that negotiate contracts in Microsoft Word. Not published 試用 Semi-autonomous Microsoft Word, Email, Slack - Fit for the job27/30 - Autonomy13/20 - Controls12/15 - Integrations8/15 - Access4/10 - Evidence9/10 4 Paxton Litigation attorneys and small firms that want research and drafts tied to the case file. $499 per user/month なし Copilot DMS, Claude, Microsoft Word +1 - Fit for the job24/30 - Autonomy9/20 - Controls13/15 - Integrations9/15 - Access8/10 - Evidence9/10 5 Clio Law firms that want practice management, billing, and matter-aware AI in one system. From $49/user/mo 試用 Copilot Gmail, Microsoft Outlook, QuickBooks +2 - Fit for the job23/30 - Autonomy9/20 - Controls13/15 - Integrations10/15 - Access8/10 - Evidence9/10 6 CoCounsel Firms and professional teams that want AI tied to Westlaw, Practical Law, or Checkpoint. Not published なし Copilot Westlaw, Practical Law, Checkpoint +1 - Fit for the job26/30 - Autonomy9/20 - Controls13/15 - Integrations9/15 - Access4/10 - Evidence9/10 7 Lexis+ AI Attorneys who want drafting and research grounded in LexisNexis authority and Shepard's. Not published 試用 Copilot Shepard's - Fit for the job25/30 - Autonomy9/20 - Controls13/15 - Integrations6/15 - Access4/10 - Evidence9/10 8 Eve Personal injury and other plaintiff firms that want intake, medical review, and drafting in one system. Not published なし Semi-autonomous CMS - Fit for the job22/30 - Autonomy13/20 - Controls12/15 - Integrations6/15 - Access4/10 - Evidence9/10 9 EvenUp Personal injury firms that want demands, medical review, and negotiation support from case files. Not published なし Semi-autonomous CMS - Fit for the job21/30 - Autonomy13/20 - Controls12/15 - Integrations6/15 - Access4/10 - Evidence9/10 10 Luminance Enterprises that want contract review and portfolio insight beyond the legal department. Not published なし Semi-autonomous None named on the pages we opened - Fit for the job20/30 - Autonomy13/20 - Controls12/15 - Integrations4/15 - Access4/10 - Evidence9/10 順位 1 73 Large law firms and corporate legal departments running high-stakes work on one platform. - Fit for the job29/30 - Autonomy13/20 - Controls12/15 - Integrations6/15 - Access4/10 - Evidence9/10 順位 2 73 Law firms and in-house teams that want agentic workflows across research, review, and delivery. - Fit for the job28/30 - Autonomy13/20 - Controls12/15 - Integrations7/15 - Access4/10 - Evidence9/10 順位 3 73 Law firms and in-house teams that negotiate contracts in Microsoft Word. - Fit for the job27/30 - Autonomy13/20 - Controls12/15 - Integrations8/15 - Access4/10 - Evidence9/10 順位 4 72 Litigation attorneys and small firms that want research and drafts tied to the case file. - Fit for the job24/30 - Autonomy9/20 - Controls13/15 - Integrations9/15 - Access8/10 - Evidence9/10 順位 5 72 Law firms that want practice management, billing, and matter-aware AI in one system. - Fit for the job23/30 - Autonomy9/20 - Controls13/15 - Integrations10/15 - Access8/10 - Evidence9/10 順位 6 70 Firms and professional teams that want AI tied to Westlaw, Practical Law, or Checkpoint. - Fit for the job26/30 - Autonomy9/20 - Controls13/15 - Integrations9/15 - Access4/10 - Evidence9/10 順位 7 66 Attorneys who want drafting and research grounded in LexisNexis authority and Shepard's. - Fit for the job25/30 - Autonomy9/20 - Controls13/15 - Integrations6/15 - Access4/10 - Evidence9/10 順位 8 66 Personal injury and other plaintiff firms that want intake, medical review, and drafting in one system. - Fit for the job22/30 - Autonomy13/20 - Controls12/15 - Integrations6/15 - Access4/10 - Evidence9/10 順位 9 65 Personal injury firms that want demands, medical review, and negotiation support from case files. - Fit for the job21/30 - Autonomy13/20 - Controls12/15 - Integrations6/15 - Access4/10 - Evidence9/10 順位 10 62 Enterprises that want contract review and portfolio insight beyond the legal department. - Fit for the job20/30 - Autonomy13/20 - Controls12/15 - Integrations4/15 - Access4/10 - Evidence9/10 ## 価格、機能、要約 1 ### Harvey Large law firms and corporate legal departments running high-stakes work on one platform. Harvey is an AI platform for law firms and in-house teams, with agents, shared Spaces, a document Vault, contract intelligence, and a command center for usage. The site says more than 3,000 legal organizations use it and that default controls include SAML SSO, audit logs, IP allow-listing, and data lifecycle management. 利用者の声 r/biglawの訴訟担当は、事務所が公開チャットボットを許さないとき、Harveyは顧客仕事に足り、校正と矛盾の確認に触れる、と書いています。 r/legaltechの試用者は、販売の押しが強く、製品はGPTの薄い画面に感じた、と書いています。不満は価格であり、足りない機能の一覧ではありません。 - “I find Harvey invaluable in my work (I’m a litigator). I think that ChatGPT performs better, but Harvey is more than good enough, and we’re not authorized to use public models with client materials.”Reddit - “For the price, complete bullshit. the sales team oversells like crazy, but under the hood it’s just a thin UI on top of GPT with a prompt sheet and some document storage.”Reddit · u/tulumtimes2425 Harveyの料金と機能/Harveyの代替 2 ### Legora Law firms and in-house teams that want agentic workflows across research, review, and delivery. Legora describes itself as collaborative AI for lawyers, with the Legora aOS connecting information, communication, and execution of legal work. Its Agent plans, executes, reviews, and delivers work, and the product list includes a Word add-in, Outlook add-in, tabular review, legal research, and a portal. 利用者の声 r/legaltechのある比較は、小さい事務所にはLegoraのほうがHarveyより易しく見えた、と書いています。 同じコメントはより限られていると言い、別のコメントは大きい事務所が買うものではない、と書いています。 - “Legora looked a bit easier to use but also more limited.”Reddit - “Harvey is a waste, too high of a price. Legora apparently isn't Enterprise ready if you're at a large law firm.”Reddit Legoraの料金と機能/Legoraの代替 3 ### Spellbook Law firms and in-house teams that negotiate contracts in Microsoft Word. Spellbook reviews and drafts contracts and applies playbooks, with intake from email and Slack and a Word add-in plus an Associate multi-document agent. The company says it is trusted by 5,000+ legal teams and lists SOC 2 Type II, HIPAA, GDPR, and zero data retention with LLM providers. 利用者の声 Harveyを離れて小さめの道具に移ったr/biglawのコメントは、着地先の一つにSpellbookを挙げています。 そのコメントはSpellbookの失敗を書いていません。出力は自分でまだ確認する、とあります。 - “So I moved to smaller tools like Spellbook, AI Lawyer, and CoCounsel and it honestly felt like the same practical benefit with less fuss.”Reddit Spellbookの料金と機能/Spellbookの代替 4 ### Paxton Litigation attorneys and small firms that want research and drafts tied to the case file. Paxton is AI for litigation teams that keeps the matter record, legal research, and drafting in one workspace, with citations to case files and authority. The site says it connects to a DMS, Claude, Microsoft Word, and Outlook, and that it is SOC 2, ISO, and HIPAA compliant. Paxtonの料金と機能/Paxtonの代替 5 ### Clio Law firms that want practice management, billing, and matter-aware AI in one system. Clio Manage is practice-management software for matters, documents, time, billing, trust accounting, and client payments. The pricing page says AI is included on Core and above, grounded in the firm's matters, and that firm data is not used to train AI. Clioの料金と機能/Clioの代替 6 ### CoCounsel Firms and professional teams that want AI tied to Westlaw, Practical Law, or Checkpoint. CoCounsel is Thomson Reuters' AI for legal, tax, audit, compliance, and drafting work, grounded in its content and connected to Westlaw, Practical Law, Checkpoint, Microsoft 365, and document-management partners. The company says customer content and prompts are not used to train CoCounsel or the underlying models, and that OpenAI and Google calls use zero-retention APIs. 利用者の声 r/biglawの同じコメントは、日常の起草でHarveyの席を置き換えた小さめの道具の一つとしてCoCounselを挙げています。 そのスレッドにCoCounselだけの失敗は読んでいません。共通点は、人が草稿をまだ確認する、ということです。 - “Still have to review everything yourself either way.”Reddit CoCounselの料金と機能/CoCounselの代替 7 ### Lexis+ AI Attorneys who want drafting and research grounded in LexisNexis authority and Shepard's. The Lexis+ with Protégé free-trial page, which describes the product formerly presented as Lexis+ AI, says it accelerates research, drafting, and analysis grounded in LexisNexis content and Shepard's citations. It also says general AI and legal AI can be used together in one secure workspace. Lexis+ AIの料金と機能/Lexis+ AIの代替 8 ### Eve Personal injury and other plaintiff firms that want intake, medical review, and drafting in one system. EveOS is an AI operating system for plaintiff law firms, covering intake, medical chronologies, demand letters, discovery, research, and a nightly auditor that reviews active matters. Eve says it is trusted by 1,200+ firms, is SOC 2 Type II and HIPAA compliant, and does not use case data to train shared models. Eveの料金と機能/Eveの代替 9 ### EvenUp Personal injury firms that want demands, medical review, and negotiation support from case files. EvenUp is AI for personal injury firms covering intake, treatment tracking, demands, negotiation, discovery, and trial prep. The site says demands can be instant AI drafts or legal-reviewed drafts, cites a 250K+ verdict and settlement dataset, and says the company is SOC 2-audited and HIPAA-attested. EvenUpの料金と機能/EvenUpの代替 10 ### Luminance Enterprises that want contract review and portfolio insight beyond the legal department. Luminance is a contract-intelligence platform for negotiating with playbooks, discovering risk and obligations across a portfolio, and automating workflows from intake to signature. It says it is used by 1,000+ enterprises and lists ISO 27001 and SOC 2 Type II. Luminanceの料金と機能/Luminanceの代替 ## AIエージェントとは 法律AIは契約を読み、判例を探し、出典つきで下書きします。Harvey、Spellbook、CoCounselは消費者向けの弁護士ではありません。事務所向けの価格は個別が多いです。 ## このリストの並び このリストの上位には Harvey, Legora, Spellbook があります。順序は公開スコアで、広告枠ではありません。 ## 比べる点 仕事、開始価格、結果を人がまだ承認するかを見てください。 - その製品が実際にやる仕事 - 公開価格、無料プラン、または明確な個別価格 - 顧客に届く前の確認 ## この種のソフトウェアの用途 同じ手順が繰り返されるときに使います。判断は人が持ちます。 - デモの前に開始価格を見る - 汎用チャットではなく、この仕事の製品を比べる - 長いメモは製品ページで読む ## このリストの相手 仕事の中身が分かっていて、料金に日付のある製品を見たい人向けです。 ## 公開されている開始価格 確認できた開始価格: Harvey (Not published), Legora (Not published), Spellbook (Not published)。確認日は2026年10月5日。 ## 選び方 まず仕事を合わせ、次に誰向けか、営業電話なしで始められるかを読んでください。 ## 近いカテゴリ 隣の仕事には別の一覧があります。 - おすすめのAI議事録 - おすすめのAI会計ソフト - データ分析向けAIツール ## よくある質問 ### おすすめの法律AIツールには何が入りますか ### 料金はベンダーの公開価格ですか ### 星評価やレビュー件数はありますか ## 採点方法 確認日 5 October 2026 すべての製品を同じ6項目で100点満点にします。順位は合計、適合、名前の順です。 方法の全文を読む.