Pricing

Simple per-user pricing

Start with practice management. Add AI for the people who want it. Pay for what your firm uses, on the Microsoft 365 tenant you already run.

Core

Practice management on your Microsoft 365.

$59per user / month
Billed monthly, cancel any time
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30 days free, no card required
  • Matters, contacts and conflicts
  • Time and expense tracking
  • Billing, invoices and trust accounting
  • Document generation from your templates
  • A SharePoint site per matter, in your tenant
  • Microsoft Teams app and Outlook add-in
  • Reports: WIP, AR aging, production
Most popular

Plus

Core plus AI Core: the assistant that fills in your day.

$98per user / month
Billed monthly, cancel any time
$82 with your own AI keys (BYOK, 40% off the AI portion)
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30 days free, no card required
  • Everything in Core
  • Found-time capture from mail, calendar and documents
  • Billing narratives and pre-bill clean-up
  • Matter briefs and deadline extraction
  • AI intake and conflict screening
  • Morning digest
  • 1,500 AI credits per user per month

Pro

Core plus AI Pro: frontier models with autonomy.

$138per user / month
Billed monthly, cancel any time
$106 with your own AI keys (BYOK, 40% off the AI portion)
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30 days free, no card required
  • Everything in Plus
  • Ask Your Matter and firm knowledge search
  • Drafting assistant and demand packages
  • Autonomy: approved actions run without a click
  • Frontier models, credits pooled across the firm
  • MCP and assistant connectors
  • 5,000 AI credits per user per month

Enterprise

For multi-office firms with their own requirements.

Custom
Volume and invoiced billing
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  • Everything in Pro
  • Volume pricing and invoiced billing
  • Bring your own AI keys (BYOK)
  • Dedicated onboarding and data migration help
  • Custom document and bill templates
  • Security review and DPA on request
  • Priority support with an SLA
The details

How the numbers work

Per user, per month

Every active user in your firm is a seat. Core seats cover practice management; AI seats add an AI Core or AI Pro allotment for that person only, so paralegals and partners can be on different tiers.

Annual billing

Pay for the year up front and save 17% on every seat. Seats added mid-term are prorated to the same renewal date.

AI credits and overage

Included credits reset monthly. Usage beyond the allotment is metered at $0.01 per credit; the Admin usage page shows the running total and lets you set a cap.

Bring your own keys

Connect your own AI provider keys and the AI portion of a seat drops by 40%. Your usage then bills through your provider, not us.

Questions

Frequently asked

Do we need Microsoft 365?
Yes. Proserus runs on your firm’s Microsoft 365 tenant: sign-in uses your Microsoft accounts, and every matter gets a SharePoint site and document library in your own tenant. Any Business or Enterprise plan works; most firms already have one.
Where is our data stored?
Your documents, email and calendar stay in your Microsoft 365 tenant. Practice records (matters, contacts, time, invoices, trust ledgers) are stored in our US-hosted, encrypted database, isolated per firm with row-level security. The vendors that host or process data for us, including the AI providers, are listed on our Subprocessors page.
What is BYOK?
Bring your own key. If your firm already has an agreement with an AI provider, connect your own API keys and AI calls run against your account instead of ours. The AI portion of your seat price drops by 40%. Available on Plus and Pro; Enterprise includes it.
How do AI credits work?
Plus includes 1,500 credits per user per month and Pro includes 5,000, pooled across the firm on Pro. A credit is roughly a thousand words processed by a standard model; frontier models use more credits per call. Beyond the allotment, usage is metered at $0.01 per credit and shows on your invoice. You can cap overage in Admin.
How does the free trial work?
Every new firm starts a 30-day trial of Pro with a starter credit allotment. No card is needed to start. At the end of the trial you pick a plan in Admin → Billing; if you do nothing, the firm pauses until you do.
Who can sign up?
A Microsoft 365 administrator for your firm (Global Admin or Application Admin), because registering Proserus needs consent for your tenant. If you are not an admin, ask your IT contact to sign up, or contact sales for an invite code.
Can we switch plans or cancel?
Yes. Plans change in Admin → Billing and take effect on the next invoice. Monthly plans cancel any time; annual plans run to the end of the term. Your data stays in your Microsoft 365 tenant either way.

Ready to try it on your tenant?

A Microsoft 365 admin can have the firm running in minutes. Prefer to talk first? Email sales@proserus.com.

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