Accounting platforms and unified-API connectors used to land embedded-finance transactions in customer ledgers (QuickBooks, Xero, NetSuite, Sage).
Business customers expect a card, payments or spend product to land in their general ledger: categorized, reconciled and matched to the right accounts. Accounting connectors make that happen, either as direct integrations with each platform or through one API that reaches many.
Because integration pages list them openly, accounting platforms are among the most-disclosed relationships in the Index. The ranking shows which ledgers fintechs prioritize when they build these integrations.
Cloud ledgers used by small and mid-sized businesses, and the first integrations most fintechs build. Most-named in the Index: QuickBooks, Xero and Sage.
Ledgers and ERPs used by larger companies, usually needed to sell upmarket. Most-named in the Index: NetSuite, Sage Intacct and SAP.
Automation tools and commerce or CRM systems that sit next to the ledger in the same integration lists. Most-named in the Index: Zapier, Shopify, Stripe and Salesforce.
An embedded accounting connector syncs a fintech's transactions, invoices and bills into the accounting software its customers already use, so their books stay up to date without exports. The fintech integrates directly with each accounting platform or through a unified accounting API.
By number of companies linked to them through public disclosures and provider customer lists, the most-named accounting platforms in fintech integrations are QuickBooks (805), Xero (494), NetSuite (325), Sage (147) and Sage Intacct (136) (Embedded Finance Index, October 2026).
Native accounting means the fintech keeps the books itself, so customers use its product as their ledger. An accounting integration sends the fintech's data into a separate accounting system the customer already uses. Many fintechs offer both for different customer sizes.
The Embedded Finance Index analyzes the public infrastructure stacks of 6,585 fintech and embedded-finance companies. A provider is counted when a company names it in its own disclosures — terms, partner pages, press releases — or when the provider publicly lists that company as a customer. Counts are relationships, not revenue or volume.