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Every company you serve pays for accounting software it never opens, and an accountant to label what your software already knew. Vexless lets you sell them accounting software inside your product.
Writing the code for accounting software is easy when Vexless covers the compliance, the accounting logic and the integrations, the parts you would not want to leave to an agent.
Knowing a customer segment inside out, and shaping the data before it reaches the books, is the hard part. You already have it.
Vexless is wholesale infrastructure underneath your product, paid per company by you. Your customer never buys from us, hears from us, or gets an invoice from us. You are not reselling Vexless. You are the accounting software for your segment.
Built API-first. Before your team commits any time, we walk them through the API, the architecture and the sandbox, and give you an estimate of the integration against your own data model.
Sandbox with a simulated bank, tax administration and e-invoice network. SDKs for Node, Python and .NET. Every write idempotent, every change a signed webhook.
# one customer company, four calls POST /v1/entities POST /v1/entities/{id}/invoices POST /v1/entities/{id}/bank-connections POST /v1/entities/{id}/vat-returns/2026-08/file
| invoice.paid | bank transaction matched an open invoice |
| purchase.received | e-invoice arrived, coding proposed |
| vat_return.ready | period computed, ready for review |
| period.closed | statements available |