Comparison

Harvey vs Flank

Harvey is the leading AI platform for legal professionals. Flank is an agentic legal service with an embedded front door that captures, triages, and routes work — then handles it end-to-end. They solve different problems, come from different budgets, and are architecturally complementary.

Published April 2026
Reading time 6 min
Audience GCs, CLOs, Legal ops
01 — The difference

A tool your lawyers use vs. a service you deploy

Harvey is an AI platform that makes lawyers more productive. Flank is an agentic service you insource routine legal work to — with an embedded front door that captures requests from the channels the business already uses, handles what it can, and routes the rest.

🛠️
Harvey
AI software platform. Lawyers log in and use Harvey to draft, research, and analyse faster. 100,000+ lawyers across 1,300 organisations. The market leader in legal AI software.
Flank
Agentic legal service. A front door embeds in your email and messaging tools, captures every request, and either handles it end-to-end (supervised agents do the work) or routes it to the right lawyer with full context. No adoption required. No change management.
02 — Head to head

How Harvey and Flank compare

Category
Harvey
AI software platform — a tool lawyers log into
Flank
Agentic legal service — a front door + agents that do the work
Adoption
Harvey
Every lawyer needs to learn and use the platform
Flank
Zero — embeds in email and messaging tools the business already uses
Budget & buyer
Harvey
Software spend · Per-seat licence · Legal ops or innovation lead
Flank
Services spend · Per-matter pricing · GC or CFO
Best for
Harvey
Complex, bespoke work — M&A, litigation, regulatory, legal research
Flank
High-volume, repeatable work — NDAs, procurement, redlines, triage
Oversight
Harvey
Each lawyer reviews their own AI outputs
Flank
Trained supervisors review all agent output before delivery
ROI model
Harvey
Productivity — lawyers handle more work per hour
Flank
Cost displacement — routine work costs less because lawyers stop doing it
03 — When to use which

Harvey is right for some things. Flank is right for others.

Harvey is the right choice when…
  • You need lawyers to work faster on complex, high-judgement matters
  • The work is bespoke — M&A, litigation strategy, regulatory opinions
  • You want AI-powered legal research with access to primary law
  • Your team is efficient and needs a productivity multiplier
  • The work can't be standardised into repeatable playbooks
Flank is the right choice when…
  • Expensive people are doing inexpensive work and you want that to stop
  • The work is high-volume, repeatable contracting
  • You've tried AI tools but lawyer adoption has been slow or inconsistent
  • You have no structured intake — work arrives by email, Slack, hallway conversations with no visibility on volume or pickup time
  • You're currently spending on ALSPs or outside counsel for overflow
  • The bottleneck isn't speed — it's that the work shouldn't be on your team at all
The key question

Do you need your lawyers to be faster, or do you need the routine work handled entirely so your lawyers can focus on the work that requires their judgement? If it's the first, Harvey is a strong fit. If it's the second, that's what Flank was built for.

04 — Using both

Harvey + Flank: architecturally complementary

Harvey and Flank aren't just compatible at the budget level. They're architecturally synergistic — Flank's front door captures all inbound work, handles what it can, and routes everything else to lawyers who can use Harvey for the complex matters that land on their desk.

Layer 1 — The front door
Capture and triage
Flank's front door sits in the channels the business already uses. Every request is intercepted, categorised, and assessed. Simple questions are answered immediately — low latency, no lawyer required.
Layer 2 — Agent execution
Routine work, handled
Standard NDAs, procurement contracts, playbook-based redlines, contract triage. The agent does the work. Supervisors check every output. The work never touches your lawyers' desks.
Layer 3 — Lawyer + Harvey
Complex work, amplified
Non-standard matters, high-risk clauses, bespoke advisory. Escalated to your lawyers with full context — and your lawyers use Harvey to work through them faster.

This is the model that makes Harvey's ROI real. When your lawyers aren't buried in NDA reviews and procurement triage, they can actually use Harvey for the work it was built for — complex M&A analysis, litigation strategy, regulatory research. Flank clears the deck. Harvey amplifies what's left.

The complementary logic

Harvey on the software budget makes lawyers more productive on complex work. Flank on the services budget removes routine work from their plates entirely. The result: your lawyers spend more of their time on high-value work, with better tools to do it. Different problems, different budgets, one legal function operating at a structurally different level.

05 — How Flank works

The legal front door: insource to agents, not to law firms

Flank embeds into the tools your business already uses — email, Teams, Slack, shared inboxes. The business doesn't adopt a new tool. They don't learn a new interface. They email legal the same way they always have. The difference is what happens next.

1
A request arrives
A sales rep, procurement lead, or HR manager emails an address like contracts@company.com. They attach a document, describe what they need, and hit send. Nothing changes for them.
2
The front door picks it up
The agent reads the email, categorises the request, assesses urgency, extracts context from any attachments, and decides what to do. Simple requests — a standard NDA, a policy question, a template request — are resolved directly and the response sent back. Low latency, no lawyer required.
3
Complex work goes to the right person
Work that requires human judgement is routed to the most relevant lawyer or agent — with the request already categorised, context extracted, urgency assessed, and a recommended position prepared. Your team picks up pre-triaged work that's ready to action, not raw emails they need to decode.
4
Every output is supervised
Trained supervisors review all agent output before it reaches the business. Your templates, terms, playbooks, and escalation thresholds are configured upfront. Quality is maintained. Your risk tolerance is respected.
The services reframe

Flank isn't a tool you give to your lawyers. It's a service you deploy into your legal function. The business interacts with the front door — embedded in the tools they already use. Agents do the work. Supervisors check it. Lawyers only see what needs their judgement. The budget it replaces isn't your software line — it's the ALSP, outside counsel, and contract lawyer spend you're already making.

06 — Summary

Two approaches, one legal team

Harvey
Make lawyers faster
Software budget
Per-seat licence
Requires adoption
Flank
Replace routine work
Services budget
Per-matter pricing
Zero change management

The best-run legal departments won't choose Harvey or Flank. They'll deploy Flank's front door to capture and triage all inbound work, let agents handle the routine matters, and use Harvey to amplify their lawyers on the complex work that remains. The result: a legal function that's both faster and leaner — with every person and every tool working on the right category of problem.

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Flank

Insource legal work to supervised agents

Enterprise legal teams use Flank to handle high-volume contracting end-to-end — NDAs, MSA redlines, procurement, triage. Agents that know your templates, terms, and escalation rules.

Learn more at flank.ai