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Aavenir Atlas early access is open Contractflow on the ServiceNow Store since 2019 Runs on ServiceNow, or standalone ProcureTech100 2025/26 Pioneering Digital Solution ISO/IEC 27001:2022 certified, SOC 2 Type 2 compliant

Glossary

What is source to pay (S2P)?

Source to pay is the end to end procurement process, from spend analysis and sourcing through contracting and purchasing to processing invoices and paying suppliers.

Schedule a Demo All Glossary Terms

Stages of source to pay

  • Spend analysis and category planning
  • Supplier discovery and sourcing
  • Contract negotiation and management
  • Supplier onboarding and management
  • Requisitions and purchase orders
  • Receipt, invoice matching and payment

Why it matters

Many organizations still run sourcing, contracting, buying and paying as separate processes, which hides spend and lets negotiated terms slip before the invoice is paid. Source to pay links strategic decisions with daily buying, so the supplier chosen and the terms negotiated are the ones used and paid. That improves control, compliance and the value procurement can show.

Source to pay vs. procure to pay

Procure to pay starts at the requisition and covers buying and paying. Source to pay adds the front end: spend analysis, sourcing and contracting. The difference matters because most savings are won in sourcing and contracts, and most are lost when invoices are not checked against them.

How Aavenir handles it

Aavenir covers source to pay around the contract. RFPflow runs sourcing events, Contractflow manages the agreement, Onboardingflow verifies suppliers and Invoiceflow checks invoices against the signed terms, natively on ServiceNow or standalone.

Keep reading

Procure to pay process The procure to pay process is how an organization buys and pays for the goods and services it needs, from the first requisition to invoice approval and payment.Read more Source to settle Source to settle is the connected cycle of sourcing and buying, from requisition and sourcing events through orders and receipt to paying the supplier invoice.Read more Electronic sourcing Electronic sourcing, or eSourcing, runs sourcing online: finding and inviting suppliers, collecting and comparing bids, negotiating and awarding contracts.Read more

Frequently asked questions (FAQ)

Common questions

What is the difference between source to pay and procure to pay?

Source to pay covers the whole cycle, including spend analysis, sourcing and contracting. Procure to pay is the operational part, from requisition to payment. Procure to pay is where most daily transactions happen. Read about procure to pay.

What does source to pay software include?

Usually sourcing and request for proposal tools, contract management, supplier onboarding, purchasing and invoice processing, with analytics across them. Suites differ in how tightly those parts share data. Ask how well each part shares data with the rest. See RFPflow.

Why is the contract central to source to pay?

The contract is where sourcing results become binding terms. If purchasing and invoices are not checked against it, the savings negotiated in sourcing are lost at payment. That is why the contract should be checked at every stage. See Invoiceflow.

Have a question we have not answered? Ask the Expert

Schedule a demo

See your contracts run on one record.

  • 1 A 30 minute walkthrough Built around your team, whether that is procurement, legal, IT or finance.
  • 2 Your contracts, not ours Bring a few sample agreements and watch Aavenir AI extract and review them.
  • 3 ServiceNow or standalone We show the deployment that fits the systems you already run.

Prefer to talk first? Contact the team.