● Built for professional service firms

Run your whole firm from one place.

Practice management, time tracking, billing, bookkeeping, proposals, a client portal and AI assistants — together in one secure platform. Less tool-switching, more time serving clients.

Sales-assisted onboarding · Data stays in your region (Canada or US) · Field-level encryption
🇨🇦🇺🇸 Canadian & US data residency 🔒 Field-level encryption 🏢 Multi-office ready 🧾 CRA-aligned tax workflows ⚡ One login for the whole firm
Everything your firm needs

One platform, every part of the practice

Stop stitching together spreadsheets, inboxes and half a dozen apps. OneFirmOS connects the work, the time, the clients and the books.

Practice management

A visual work board, triage queue and capacity planning keep every engagement moving — from "To Be Assigned" all the way to filed.

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Time tracking & timesheets

Log time against jobs with timers or weekly timesheets, track budget vs. actual, and turn every billable hour into WIP automatically.

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Billing & payments

Turn WIP into invoices, collect online through your own Stripe account, and reconcile payments — with automatic reminders on overdue accounts.

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Workflow automation

Recurring jobs generate themselves from engagements, statuses advance on triggers, and overdue work is chased for you — no manual copying.

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AI assistants

Built-in Claude, ChatGPT and Microsoft Copilot can draft proposals, create clients and jobs, and answer questions about your practice.

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Proposals & engagements

Branded proposals and engagement letters with e-signatures that turn into work and recurring billing the moment a client accepts.

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Client portal

Give clients a secure, branded space to share documents, answer requests, e-sign and pay invoices — no more chasing email attachments.

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Accounting Hub

A full accounting workspace per client — cash coding, HST/GST handling and working papers — built for Canadian compliance.

Security & compliance

Field-level encryption, database-enforced tenant isolation and in-region data residency protect your clients' most sensitive data.

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AI, built in

An assistant that actually does the work

Claude, ChatGPT and Microsoft Copilot are on board from day one — draft proposals, create clients and answer questions about your practice, with a preview before anything is saved.

Explore the AI assistant
6→1
Separate tools replaced by one platform
3
AI providers, isolated per conversation
100%
Data hosted in Canada & the US
1
Login for the whole firm
One platform

Replace the stack you're paying for separately

Firms come to OneFirmOS to consolidate the patchwork of tools their practice runs on today.

Practice-management app Practice management Time & billing tool Time tracking & billing Proposal software Proposals & e-sign Document portal Client portal Bookkeeping tool Accounting Hub Shared inbox Email intake Separate AI subscriptions Built-in AI
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See OneFirm in action

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