7 Best AI Law Firms

An AI law firm is a regulated law firm where AI agents prepare legal work and licensed lawyers answer for it. This guide ranks seven picks by use case. Arceus Legal ranks #1 for commercial contract review: AI prepares each review, a licensed attorney approves it, prices are published, and turnaround is guaranteed.

Arceus Legal publishes this site and is ranked #1 below. We've aimed to describe every other pick fairly and tell you when one of them fits better.

Key Takeaways

• An AI law firm sells legal work a lawyer signs off; AI software sells a tool your team checks.
• Arceus Legal, Crosby and General Legal compete for startup contract review; Eudia serves enterprise legal departments.
• Eve and Marveri are software for law firms, so their users supply the lawyer sign-off.
• Before sharing a contract, ask who signs, what malpractice cover applies, and where your data goes.

How We Evaluated These AI Law Firms

We scored each pick on five criteria: regulated status, who signs the output, practice area fit, pricing transparency and published turnaround. Sign-off and regulated status carried the most weight, since they decide who answers for a mistake.

We read each provider's website, pricing page and one or more news or regulator sources. Pricing and features were last updated on September 28, 2026.

Many buyers also weigh Cooley, Gunderson Dettmer and Wilson Sonsini, full-service firms built for financings, M&A and IPOs. None of the three publishes flat per-document prices for contract review. Arceus Legal handles commercial contracts at a flat price set before work starts, with an 8 hour turnaround or the review is free.

What Makes a Law Firm AI-Native Rather Than AI-Assisted

An AI-native law firm designs its workflow around AI agents from intake to delivery, with lawyers approving the output. An AI-assisted firm runs a traditional hourly practice and gives its associates AI tools on the side.

The difference shows up in the invoice. AI-native firms such as Crosby and General Legal charge flat or per-document fees, because faster preparation lowers their cost per matter. An hourly firm that adopts AI still bills for time.

Structure matters too. Eudia Counsel runs under Arizona's Alternative Business Structure program, which permits non-lawyer ownership of law firms with court authorization. Garfield.Law was authorised by the Solicitors Regulation Authority in May 2025.

Eve and Marveri, two well-known names here, sell AI software to law firms and don't practice law.

How to Evaluate an AI Law Firm

Evaluate an AI law firm on accountability first and speed second, using six questions.

1. 1.Is the entity a regulated law firm? The tell: a named firm structure, such as a PLLC, an ABS license or SRA authorisation, on the site.
2. 2.Does a licensed lawyer approve every output? The tell: the provider names the approval step instead of citing only "human oversight."
3. 3.Is the price fixed before work starts? The tell: a published rate card or a written quote per document.
4. 4.Is turnaround published, with a remedy if missed? The tell: a stated hour count and what happens when it slips.
5. 5.Which jurisdictions do the lawyers cover? The tell: named bar admissions or a stated governing law range.
6. 6.How does the firm escalate risk? The tell: a playbook process that routes non-standard clauses to your team.

At Arceus Legal, contracts arrive through Slack or email intake on CounselOS, and AI prepares the first pass. An attorney reviews and redlines, and unusual terms escalate to you. Compare the models in our guide to AI contract review tools with licensed attorney sign-off.

Best for Commercial Contract Review

Three AI law firms compete directly for startup contract review, each with licensed US attorneys and flat fees.

1. Arceus Legal: Best for Commercial Contract Review With Attorney Sign-Off

Arceus Legal is a US law firm where AI agents prepare each contract review and a licensed attorney approves the output. It serves B2B software companies that sign NDAs, MSAs and DPAs every week without an in-house legal team.

Arceus Legal describes itself plainly on its homepage: "Arceus is a law firm. Every engagement is handled by our licensed, U.S.-barred attorneys."

Contracts reach CounselOS through Slack or email, and the platform connects to HubSpot, Salesforce and Gmail. Arceus Legal's homepage promises an 8 hour turnaround on contract reviews, or the review is free.

Picture a 40-person SaaS company with a 30-page enterprise MSA due before quarter-end. Under that promise, the attorney-approved redline is due within 8 hours of submission.

• Covers NDAs, MSAs, SOWs, vendor and customer contracts, DPAs, renewals, Terms of Service, Privacy Policies and BAAs.
• CounselOS includes a contract vault, e-signature and renewal tracking, plus close-date prediction.
• Arceus Legal keeps a memory of each customer's positions. A second MSA gets reviewed against the first, with your legal preferences, risk tolerance and business goals in view.
• Custom plans add a named attorney, custom playbooks and reserved quarter-end capacity.
• Backed by Greycroft, Craft Ventures, South Park Commons and Conviction, per the homepage.

Pricing: NDA and order form review costs $250, and standard review of 1 to 24 pages runs $500 to $1,000. Complex review starts at $1,000, per Arceus Legal pricing.

Who should choose Arceus Legal:

• Seed through Series D software companies that sign commercial contracts every week.
• Solo general counsels who need overflow capacity at quarter-end.
• Sales teams losing deal cycles to slow redlines.

Limitations: Arceus Legal is contract-focused and works under US law only. It doesn't handle litigation, employment disputes or M&A deal counsel, and teams that want to redline in-house should buy software. Contract drafting is quoted per project instead of listed.

2. Crosby: Best for Sub-Hour Contract Turnaround

Crosby is an AI-first law firm that reviews commercial contracts for venture-backed startups. It states a turnaround of under an hour. Its client list reads like a roster of fast-growing AI companies.

Crosby's homepage says the firm "reviews contracts in under an hour" for its clients. It calls itself "a Professional Limited Liability Company with barred attorneys" and says it carries full malpractice insurance. The firm lists 50+ licensed attorneys who review all work and manage the AI agents.

Forbes reported on March 31, 2026 that Crosby raised a $60 million Series B.

• Handles NDAs, MSAs, DPAs and other commercial contracts.
• States on its homepage that it carries full malpractice insurance.
• Lists "Custom Memory: Secure, persistent knowledge tailored to your business" on its homepage.
• Returns redlines inside Slack.
• Tests counterparty simulation and voice negotiation agents, per Global Legal Post.

Pricing: fixed rates by the document; no public rate card on crosby.ai.

Who should choose Crosby:

• High-growth AI startups that want redlines within the hour.
• Teams that already negotiate heavily inside Slack.
• Companies whose counsel wants escalations under an agreed playbook.

Limitations: Crosby doesn't publish per-document prices, so you'll need a quote before comparing costs.

Crosby vs Arceus Legal

Arceus Legal publishes its per-document prices on its pricing page, and Custom plans include a named attorney. Crosby states a turnaround under an hour. Our Crosby alternatives guide goes further.

3. General Legal: Best for Contracts Plus Broader Startup Legal Work

General Legal is an AI-native law firm that pairs US-barred attorneys with AI. It publishes flat fees across contracts, employment and advisory work. It covers more practice areas than a pure contract shop.

General Legal's homepage promises "flat fees, partner-level work, and no billable hour" to its clients. Rates are quoted before the work starts. The firm lists eight practice areas, including technology transactions, employment, data privacy, tax and defense and government work.

The firm works through Slack, email or its client portal, from 5:00 AM to 6:00 PM Pacific on weekdays. It says it serves 40+ unicorns, naming Cartesia, BetterUp and Reducto among its clients.

• Simple contract review of 3 pages or fewer costs $250.
• Standard review of 3 to 25 pages costs $500, including a revision round.
• Full negotiation with unlimited turns costs $1,000; drafting costs $2,000.
• Publishes employment prices, such as $250 offer letters and $1,500 executive agreements.
• Offers a custom-priced "GC as a service" plan for recurring work.

Pricing: from $250 per simple contract review on General Legal's pricing page.

Who should choose General Legal:

• Startups that want one firm for contracts, offer letters and privacy questions.
• Founders who value an unlimited-turn negotiation price.

Limitations: Arceus Legal's review is free if it misses its 8 hour turnaround. On its website, General Legal publishes no remedy for a missed turnaround (last updated September 28, 2026). Its stated hours end at 6:00 PM Pacific on weekdays.

General Legal vs Arceus Legal

Arceus Legal's review is free if it misses its 8 hour turnaround, per the Arceus Legal homepage. On its website, General Legal doesn't publish a remedy for a missed turnaround (last updated September 28, 2026). It does cover employment, tax and privacy work that Arceus Legal doesn't offer.

Best for Enterprise Legal Departments

Enterprise legal departments need AI that encodes their own playbooks at scale.

4. Eudia: Best for Enterprise Legal Departments

Eudia sells enterprise legal AI agents to in-house teams. It also runs Eudia Counsel, a law firm licensed under Arizona's Alternative Business Structure program. It pairs a software platform with a services arm.

Eudia's homepage calls the company "The Enterprise Brain for In-House Legal Teams" on its site. Its agents codify a company's proprietary data and institutional knowledge across contracting, marketing compliance, litigation and M&A.

Eudia Counsel was approved by the Arizona Supreme Court in June 2025. Eudia's existing clients include DHL, Duracell, Cargill, Intuit, Stripe and the US government, per that release. Eudia Counsel says it matches each client with attorneys who know its industry.

• Offers commercial contracts, technology transactions, real estate and employment work through Eudia Counsel.
• Acquired ALSP Out-House in October 2025, after buying Johnson Hana. Former general counsel Lynden Renwick founded Out-House to support Fortune 500 contracting.
• Deploys forward-deployed engineers to build agents inside client systems.
• Gives each matter a named point of contact and structured reporting.

Pricing: custom pricing; no rate card on eudiacounsel.com.

Who should choose Eudia:

• Fortune 500 legal departments with high contract volume.
• Teams that want AI agents trained on their own precedent.
• Government acquisition teams, which Eudia serves as a separate vertical.

Limitations: Eudia is built for large enterprises, so a 30-person startup will find the onboarding heavier than it needs.

Eudia vs Arceus Legal

Eudia offers custom agents, engineers and a multi-practice services arm that Arceus Legal lacks. Arceus Legal publishes per-document prices sized for startups.

Best for Litigation and Plaintiff Work

Plaintiff firms need case throughput, and the strongest pick here is software used inside the firm.

5. Eve: Best for Plaintiff Law Firms

Eve is legal AI software for plaintiff law firms, covering work from intake through trial preparation. Eve doesn't practice law; the lawyers at its customer firms own every filing.

Eve's homepage calls its product EveOS, "the AI operating system for plaintiff law," and says 1,200+ firms use it. Eve raised a $103 million Series B at a valuation above $1 billion in September 2025, led by Spark Capital. The same release says Eve processes over 200,000 cases a year.

Customer firms include Mike Morse Law Firm and the Law Offices of James Scott Farrin. Eve reports customers seeing 15% to 30% higher settlements on its homepage.

• Runs 24/7 AI voice agents for case intake and evaluation.
• Builds medical record chronologies and drafts demand letters.
• Propounds and responds to discovery, and supports trial preparation.
• Tracks firm performance through an analytics product called Analyst.
• Runs legal research alongside case work, and lists a 4.9 out of 5 G2 rating on its homepage.

Pricing: custom pricing; none published on eve.legal.

Who should choose Eve:

• Personal injury and employment plaintiff firms growing case volume.
• Firm owners who want intake and demand letters automated.
• Managing partners who want analytics on case value and attorney workload.

Limitations: Eve serves plaintiff firms only, so a business with its own dispute needs to hire a law firm directly.

Eve vs Arceus Legal

Eve covers litigation workflows that Arceus Legal doesn't touch. The two serve different buyers: plaintiff lawyers buy Eve, while software companies hire Arceus Legal.

Best for M&A Diligence

M&A diligence rewards tools that read an entire data room at once.

6. Marveri: Best for M&A and Venture Diligence

Marveri is AI due diligence software for M&A and venture financings, sold to law firms and corporate deal teams. It organizes data rooms and drafts diligence work product.

Marveri's homepage calls it "the AI platform for financings and M&A" on its site. Its law firm page promises to complete diligence "in days." It produces diligence reports, request lists and disclosure schedules.

Marveri also surfaces clauses such as assignment restrictions and anti-dilution terms across a document set, per the same page. The platform serves both buy-side and sell-side transaction teams.

• Renames and files an entire data room using your folder conventions.
• Compares and redlines up to 20 documents at once.
• Drafts disclosure schedules and runs cap table tie-outs.
• Surfaces change-of-control clauses across a whole document set.
• Reads 100+ languages with OCR and connects to Google Drive, SharePoint and OneDrive.
• Lists SOC 2 Type II compliance and a zero-training data policy.

Pricing: not published; Marveri's pricing link opens a demo request form.

Who should choose Marveri:

• Venture and M&A law firms running frequent diligence.
• Corporate development teams preparing a sell-side data room.
• Startup counsel closing frequent venture financings.

Limitations: Marveri is software for lawyers, so a company without deal counsel still needs a law firm to sign off. Pricing also requires a demo request.

Marveri vs Arceus Legal

Marveri handles portfolio-wide diligence and disclosure schedules, which sit outside Arceus Legal's scope. Arceus Legal reviews the individual commercial contracts that later end up in a data room.

Best for Debt Recovery and Small Claims

Small debt claims suit AI because the steps are standard and the fees are small.

7. Garfield.Law: Best for UK Small Claims Debt Recovery

Garfield.Law is an SRA-authorised law firm that uses AI to recover unpaid invoices of up to £10,000 through the English small claims court. It serves small and midsize businesses across England and Wales.

The Solicitors Regulation Authority approved Garfield.Law in May 2025, with client approval required for every action. The Law Gazette reported that named regulated solicitors remain accountable and the system can't propose case law. The SRA also reviewed quality checks, confidentiality and conflict safeguards before approval.

Former City lawyer Philip Young and technologist Daniel Long cofounded the firm, per the Law Gazette. Its homepage describes a three-step flow: upload invoices, let the AI draft correspondence, then escalate to court if needed. Successful claimants can ask the court to order the debtor to reimburse recoverable costs.

• Sends a polite chaser for £2 and a letter before action for £7.50.
• Integrates with Sage, QuickBooks and FreeAgent.
• Processes claims in bulk and supports settlement negotiation.
• Publishes free tools, including a court fee calculator.

Pricing: from £2 per chaser letter, per Garfield.Law.

Who should choose Garfield.Law:

• UK businesses chasing invoices under £10,000.
• Finance teams that want collections linked to their accounting software.
• Bookkeepers who manage receivables for several UK clients.

Limitations: Garfield.Law works only in the English small claims court, so US debts fall outside its scope. Claims are also capped at £10,000.

Garfield.Law vs Arceus Legal

Garfield.Law recovers debts in court, which Arceus Legal doesn't do. Arceus Legal works on US commercial contracts before signature.

AI Law Firm Comparison Table

Regulation, Licensure and Malpractice Cover

AI law firms answer to the same regulators as any other firm, and the lawyer who signs stays responsible. ABA Formal Opinion 512 (July 29, 2024) addresses lawyers' use of generative AI. It warns that relying on AI output without independent review could breach the Model Rule 1.1 competence duty.

The same opinion requires managing lawyers to set clear AI policies and supervise how lawyers and nonlawyers use the tools. That duty is why named sign-off steps matter.

Ownership rules vary by jurisdiction. Arizona licenses Alternative Business Structures under ACJA § 7-209, and each one must have an Arizona-licensed compliance lawyer approved by the court's ABS committee. In England and Wales, the Solicitors Regulation Authority authorises firms such as Garfield.Law.

Malpractice cover depends on the state. Oregon's Professional Liability Fund provides primary coverage to Oregon lawyers in private practice, while most states leave insurance to the firm.

Key Data Point: In Mata v. Avianca, Inc., No. 22-cv-1461 (S.D.N.Y. June 22, 2023), the court imposed a $5,000 penalty on lawyers who filed ChatGPT-generated fake cases. Lawyer review is the safeguard that failed.

What to Ask Before Letting AI Touch Your Paper

Ask any AI law firm five things, in writing, before you send a live contract.

• Who signs the redline? Get the name and bar admission of the attorney who approves your work.
• Does the model train on my contracts? Ask for the data policy and any SOC 2 report.
• What's the price, and what triggers a change? Page count, extra rounds and rush work often move the fee.
• What happens if turnaround slips? A stated remedy beats a vague "fast turnaround" claim.
• Which terms escalate to me? Agree on a playbook for liability caps, indemnities and data terms.

Pro Tip: Send your first engagement a low-stakes NDA. You'll see the redline quality, the escalation style and the real turnaround before a large MSA is on the line.

For more providers compared on price and sign-off, read our list of the 7 best contract review services.