Complete business management software. No subscriptions. No per-transaction fees. No data leaving your building.
OpenAngus is a complete business management system built for small businesses — the kind that run on tight margins and can’t afford to send $300 a month to software companies.
It handles everything a small business needs to operate: ringing up sales, tracking inventory, managing the books, running payroll. One system, one install, no monthly bills.
Cash, card, EBT/SNAP. Split payments, gift cards, write-offs. Register sessions with full cash management and reconciliation.
Multi-location tracking, production and recipe management, lot and serial tracking. Purchase orders with automated reorder points.
Double-entry bookkeeping, GAAP-compliant. Chart of accounts, journal entries, trial balance, P&L, balance sheet. QuickBooks export.
Employee management, tax jurisdiction handling, deductions, pay schedules, time clock. Federal and state tax compliance built in.
Most small businesses piece together 3–5 different software products just to operate. Each charges a monthly fee. Each stores your data on their servers. Each can raise prices whenever they want.
Hardware cost: OpenAngus runs on a standard Windows tablet or computer. A capable setup costs roughly $600 one time — less than what most businesses pay in four months of SaaS subscriptions.
Download and install on a Windows computer or tablet. No cloud setup, no account creation, no credit card.
Set up your business — products, prices, tax rates, employees. Import existing data from QuickBooks or CSV.
Run your business. Ring up sales, receive inventory, close the books, run payroll. No internet required for daily operations.
Your data stays on your hardware. Your software doesn’t disappear if you stop paying someone. Updates are free forever.
Free tools aren’t enough if nobody teaches you how to run the business side of your business. Most small business owners are experts at their craft — baking, welding, cutting hair — not at reading a P&L statement or calculating food cost percentages.
OpenAngus is built to close that gap. Not just with software, but with the knowledge and community that help business owners survive their first five years and thrive beyond them.
Plain-language guides on the fundamentals: what a chart of accounts is and why it matters, how to read your own financial statements, what food cost percentage means for a bakery, when to hire and how to afford it. Written for owners, not accountants.
A place where OpenAngus users help each other. A bakery owner in Logan sharing what she learned about inventory shrinkage with a barbershop in Nelsonville figuring out scheduling. Peer knowledge, not corporate support tickets.
The software itself explains what it’s doing and why. When you close a register session, it doesn’t just show you numbers — it explains what an over/short means and what to do about it. Learning built into the workflow.
Sixty percent of small businesses fail within five years. Not because the owners aren’t good enough at what they do — because nobody helped them with what they don’t know. That’s what we’re here to change.
OpenAngus is built on .NET MAUI with Clean Architecture — the same caliber of engineering used in enterprise software, applied to a problem nobody in enterprise cares about: making small business tools free.
The codebase is licensed under the Business Source License 1.1 with an Additional Use Grant. In plain language: any business can use it for free, modify it, host it themselves. The only restriction is that you can’t take it and sell it as a hosted service without a commercial license. On February 7, 2030, the license converts to GPL v3 — fully open source with no restrictions.
Clean Architecture with domain-driven design. Separate bounded contexts for POS, Inventory, Accounting, and Payroll. Built to be maintained and extended.
SQLite for desktop deployments — zero configuration, runs anywhere. PostgreSQL support planned for web-based deployments.
Built with AI-assisted development. One person with 30 years of operations experience directing AI tools to write production-quality code. Proof that you don’t need a venture-funded team to build real software.
BSL 1.1 → GPL v3 (Feb 2030). Free for all business use. Owned and maintained by The OpenAngus Foundation (501(c)(3)).
Building. Testing. Deploying April 2026.
The OpenAngus Foundation (501(c)(3)) is forming in Q2 2026 to own the codebase, the license, and the mission. The Foundation will ensure the software stays free, open source, and focused on the communities that need it.
OpenAngus is open source and built to be contributed to. If you write C#, work with .NET, or care about building tools for underserved communities, there’s room for you here.
.NET 8 / MAUI, Clean Architecture, Entity Framework Core, SQLite (PostgreSQL planned), xUnit tests, WiX MSI installer. Blazor Server branch in progress for zero-install web deployment.
Check the GitHub repository for open issues. We use AI-assisted development — if that’s how you work, even better. Documentation contributions are just as valued as code.
Whether you’re a small business owner in Appalachian Ohio, a developer who wants to contribute, or someone who believes these communities deserve better tools — let’s talk.