SAP is a German software company, and its products are the business software that runs much of the world’s economy. When a company pays a supplier, ships an order, runs payroll or closes its books at the end of the month, there is a good chance an SAP system is doing the work. This guide explains what SAP is, what its software does, how the main products fit together and why so many careers are built around it.
In one sentence: SAP makes enterprise resource planning (ERP) software, which connects a company’s finance, purchasing, sales, manufacturing, warehouses and HR in one system, so everyone works from the same data.
SAP the company
SAP was founded in 1972 by five former IBM employees in Germany and is headquartered in Walldorf. The name comes from the German Systemanalyse Programmentwicklung (“system analysis program development”), and today the company describes it as Systems, Applications and Products in Data Processing.
It is one of the largest software companies in the world and the most valuable technology company in Europe. In its 2025 financial year SAP reported total revenue of about €36.8 billion, with more than €21 billion of that coming from cloud subscriptions, and it employs roughly 110,000 people. SAP says 99 of the world’s 100 largest companies are its customers, but about 80% of its customers are small and mid-sized businesses.
What does SAP software actually do?
Most people never see SAP directly, yet they rely on it every day. Think about buying a laptop online. Behind that one click, a business has to:
- check that the laptop is in stock, and in which warehouse;
- reserve it, pick it, pack it and ship it;
- bill the customer and record the revenue;
- reorder stock from a supplier and, later, pay that supplier;
- update the accounts, the tax figures and the management reports.
Before ERP, each department often had its own system: one for sales, one for the warehouse, one for accounting. Data was typed in several times, numbers didn’t match, and nobody had the full picture. SAP’s big idea was one integrated system: when the warehouse ships the laptop, the stock level, the invoice and the financial ledger all update together, in real time.
The key idea: ERP
ERP stands for enterprise resource planning. An ERP system is a set of connected modules that share one database. The best-known SAP modules include:
| Module | What it covers |
|---|---|
| FI (Financial Accounting) | General ledger, accounts payable and receivable, financial statements |
| CO (Controlling) | Cost centers, profitability and internal reporting |
| SD (Sales and Distribution) | Quotes, sales orders, deliveries and billing |
| MM (Materials Management) | Purchasing, inventory and supplier invoices |
| PP (Production Planning) | Manufacturing plans, bills of materials and production orders |
| EWM (Extended Warehouse Management) | Detailed warehouse operations |
| HCM / SuccessFactors | People, organization, time and payroll |
Because the modules are connected, one business event flows through all of them. A sales order in SD creates a delivery, the delivery reduces stock in MM, and the invoice posts revenue in FI. That end-to-end flow is why companies call SAP their “system of record”.
A short history of SAP products
- R/1 and R/2 (1970s–1980s): real-time financial and business software for mainframe computers.
- R/3 (1992): the client-server version that made SAP the global ERP leader. The “3” referred to its three-tier design: database, application server and user interface.
- SAP ERP / ECC (2000s): the evolution of R/3, often called ECC (ERP Central Component). Thousands of companies still run it today.
- SAP S/4HANA (2015): a rewritten ERP that runs only on SAP’s in-memory database, SAP HANA. It has a simpler data model, real-time analytics and the SAP Fiori user experience.
- Cloud and AI (2020s): S/4HANA in the cloud through RISE with SAP and GROW with SAP, cloud apps such as SuccessFactors, Ariba and Concur, the SAP Business Technology Platform, and the AI assistant Joule.
The 2027 deadline everyone talks about
If you work near SAP, you will hear about “2027”. SAP’s mainstream maintenance for the Business Suite 7, including ECC on enhancement packages 6 to 8, ends on 31 December 2027. Customers can pay for extended maintenance until the end of 2030, and some large customers moving through RISE with SAP can use a transition option until 2033. After that, ECC customers need to be on S/4HANA, on third-party support, or running without SAP support.
That is why so many companies are in the middle of S/4HANA projects right now, and why SAP skills, especially in security, data migration and Fiori, are in high demand.
The main SAP products today
| Product | What it is |
|---|---|
| SAP S/4HANA | The core ERP, on-premise or in the cloud (public and private editions) |
| SAP HANA | SAP’s in-memory database, the foundation of S/4HANA |
| SAP Business Technology Platform (BTP) | SAP’s cloud platform to build apps, integrate systems, manage data and run AI |
| SAP SuccessFactors | Cloud HR: hiring, performance, learning and payroll |
| SAP Ariba | Procurement and supplier networks |
| SAP Concur | Travel and expense management |
| SAP Business Data Cloud | Data products and analytics across SAP and non-SAP data |
| Joule | SAP’s AI assistant and agent platform, built into SAP applications |
At SAP Sapphire 2026, SAP brought BTP, Business Data Cloud and its AI foundation together as the SAP Business AI Platform, the base for Joule agents that can carry out multi-step business tasks.
How SAP is used day to day
Different people use SAP in very different ways:
- Business users work through apps such as “Create Sales Order” or “Approve Purchase Requisition”, usually in the SAP Fiori launchpad in a web browser, or in the classic SAP GUI.
- Functional consultants configure how processes work: pricing rules, approval workflows, chart of accounts.
- Developers build custom programs and extensions in ABAP, SAP’s own language, or on SAP BTP.
- Basis administrators keep the systems running: installation, upgrades, transports, performance.
- Security consultants decide who can do what, through users, roles and authorizations.
- Auditors test whether SAP controls work, because the financial statements depend on them.
Why SAP security matters
An SAP system holds a company’s most sensitive data: bank details, salaries, customer records, prices and the financial ledger. Every time a user tries to do something, SAP checks their authorizations. If roles are designed badly, people end up with too much access, for example someone who can both create a supplier and pay that supplier. That is a classic segregation of duties risk, and it is exactly what auditors look for.
Good SAP security combines well-designed roles, tools such as SAP GRC Access Control, secure configuration, monitoring and fast patching. It is a specialist field, and one of the most in-demand SAP skills.
Careers in SAP
SAP has a huge ecosystem of customers, consulting firms and partners, so SAP skills travel well between companies and countries. Popular paths include functional consulting (finance, supply chain, HR), technical roles (ABAP, BTP, Basis), and specialist areas such as SAP security, GRC, data and analytics. Most people start by learning one module or area well, then grow into neighboring areas.
Frequently asked questions
Is SAP a programming language?
No. SAP is a company and a family of business software. SAP does have its own programming language, ABAP, used to customize and extend SAP systems.
What is the difference between SAP ECC and S/4HANA?
ECC is SAP’s older ERP and can run on several databases. S/4HANA is the newer ERP, redesigned to run only on SAP HANA, with a simpler data model, real-time analytics and the Fiori user experience.
Is SAP only for large companies?
No. Large enterprises are SAP’s best-known customers, but most of its customers are small and mid-sized businesses, many using products such as SAP Business One or S/4HANA Cloud Public Edition.
Is SAP hard to learn?
SAP is big, but you don’t learn all of it. Start with how a business process works, such as order to cash or procure to pay, then learn how SAP supports that process. Plain-language guides make the first steps much easier.
The bottom line
SAP is the software behind the daily operations of a large share of the world’s companies. It connects finance, supply chain, sales and HR in one system, and it is moving fast into the cloud and AI. Whether you want to use it, configure it, secure it or audit it, understanding the basics of SAP is the first step.
