Double-entry enforced at the API boundary
VerifyPost an unbalanced journal in the sandbox. It must be rejected — not warned about, not silently fixed.
Use this checklist against every vendor on your shortlist — including us. It is the standard you would hold your own build to, turned into questions a one-week evaluation can answer.
Eight tests that expose correctness, portability, commercial risk, and production readiness.
VerifyPost an unbalanced journal in the sandbox. It must be rejected — not warned about, not silently fixed.
VerifyReverse a posted entry, then pull the audit history. The original must survive with the correction linked to it.
VerifyRetry the same request. Ask specifically what happens — the answer should be 'the original response, once'.
VerifyExport everything mid-trial and inspect what you would actually take with you if you left. Resistance here is a signal.
VerifyIf you cannot post a journal before talking to sales, the developer experience after the contract will not be better.
VerifyYou should be able to estimate your monthly cost before the first call — and the metering unit should be defined in writing.
VerifyAsk for certification status in writing. 'On the roadmap' stated plainly beats certification theater that collapses under 'who is your auditor?'.
VerifyEmbedded UI, headless API, white-label, or private deployment — confirm the one you need is real, not roadmap.
Most vendors in this category publish no pricing and gate evaluation behind a sales call. That is not disqualifying by itself — but every unchecked box above is risk you carry into production.
Ours is published — model your cost on the pricing page before the first call.
You do not need a committee. Five sandbox sessions answer most of the checklist:
A failed test is useful evidence. Record the response, workaround, and owner before moving on.
Start day oneScored against our own checklist — including what we have not earned yet.
Use sandbox for developer testing with no billing. When you are ready for real workflows, start production on a monthly plan with a 14-day free trial.