Talliven is open-source ERP software being built to look after your back office the way a trusted friend would. It runs payables, sales, payroll, inventory and tax on one set of books. It catches costly mistakes, like a duplicate bill or a fake bank email, and it never spends a dollar you haven’t approved. We host it for you, and the code will be open source, so once it is published anyone can run it themselves.
Talliven is in development and hasn’t run a real business’s back office yet. Everything on this page comes from our simulator.
A lookalike address sends “new bank details”. An invoice arrives twice with the number printed differently. A surcharge creeps into a unit price. In a small business, one person often enters the bill, updates the vendor and releases the payment, alone. That is one example from payables. Talliven is built to be the friend looking over their shoulder there and in every other part of the back office it runs, and no email can talk it out of that.
We tried two common payment scams on a simulated business. Both come from payables, one of the 10 areas the simulator runs. Here is how Talliven handled each one, step by step. Every model answer is replayed from a recording, so the run is repeatable.
A bill arrives, matches its order and is paid.
The same bill comes back as a “reminder”, with the number written differently. Talliven sees it is the same bill and refuses it.
The email asks for payments to a new account. The clerk falls for it and changes the vendor’s bank details. The new account starts unverified.
Someone pushes an urgent payment to the new account. Talliven refuses: money only goes to verified accounts, however urgent the request.
The regular payment run pays the other vendor and leaves Granite out. A call to the number already on file exposes the scam, and the old account is restored.
Talliven’s AI never changes your records on its own, in any module. It drafts each change as a request, a set of fixed rules we call the kernel checks it, and then you sign off.
The AI reads bills, orders, time sheets and bank feeds and drafts a request, such as “pay this bill” or “reorder this part”. A request is the only way anything changes.
The kernel rehearses each request and checks your limits, approval rules and the books’ balance. A request that fails is held, however confident the AI was.
You see exactly what will change before it does. Nothing is recorded until a person signs off.
Each part of the business gets its own level of help, and you can take the wheel back at any moment.
Talliven drafts the work and stops before anything that pays, sends, posts or changes terms. Every area starts here, and so does the alpha.
Once an area has earned it, you write the limits in plain words: what Talliven may do, what it must never do, and how much it may move in a day. Anything outside them comes back to you.
Five of the 70 faults our simulator plants on purpose and scores, all taken from payables. Each one is built to make Talliven stop and show you before any money goes out.
The same bill sent twice, or re-keyed with a new number.
A “new account” email that would send a real payment to the wrong place.
An invoice that does not agree with the purchase order and the packing slip.
A unit price or surcharge that jumped from what you agreed.
A payment above the amount a person or role is allowed to release.
Like a good new hire, Talliven starts by watching. It decides silently beside your team while you compare, and it gets more responsibility only when the record shows it is ready. Only you can promote it, and every change says who made it and who approved it.
Talliven runs the whole back office on one set of books, with modules you switch on as you grow. The simulator already runs 10 business areas end to end, from payables and payroll to production and sanctions screening. Alpha accounts get that whole core from the start, with Talliven asking first in every area.
Talliven is in development. It has not run a real business yet. Our own company goes first, in the January 2027 alpha.
10
Verified to the penny against an independent reference ledger, in simulation.
70
Faults the simulator injects on purpose, each labelled so catches and misses can be scored.
0.875
The scenarios are held back and their seeds stay secret. Not every scenario passes yet; the gap is being investigated.
341
Each is a typed Command. There is no other way to change a record, in any module.
Each phase starts only when the one before it passes its checks. Dates are targets. The checks are not, so a missed check moves the date. The mark shows how much authority Talliven has at each stage: none in the simulator, asking first in the alpha and beta, then acting and reporting in areas that have earned it.
Prove every piece in the simulator before anyone relies on it. Close the serious security findings. Our own company becomes the first account.
Hosted Talliven for a small invited group, starting with our own company. The full ERP core, every module, free, with read-only connections to QuickBooks, Xero, Mercury and Plaid as each is approved. Talliven asks first, and anything that moves money is a draft a person releases.
Open signup and published pricing. You pay per business for the actions Talliven handles in any module, with a free read-only Shadow plan and no per-seat pricing. Integrations open up: writing back to QuickBooks and Xero, Square, Shopify, PayPal, Gmail and more. More authority only per area, once it is earned.
The integrations customers expect, and Autopilot for each area once that area has earned it.
QuickBooks is a trademark of Intuit Inc., Xero of Xero Limited, and Plaid of Plaid Inc. Mercury is a fintech company, not an FDIC-insured bank. Talliven names these companies only to say what it connects to, and is not affiliated with, endorsed by or sponsored by any of them.
The alpha is invite-only, hosted by us and free. You get the full ERP core with every module, Talliven asks before it acts, and no money moves until a person releases it. Stop any time. Sign up and we’ll email you when your invite is ready.