A customer rings to chase an order, and sales can see every call but not the stock. That gap is the ERP vs CRM split: a CRM runs the front office of marketing, sales and service, while an ERP runs the back office of finance, procurement, supply chain and HR. Most growing businesses need both, so decide the order.
Both terms turn up in the same sales calls, often from the same software companies, and they blur together fast. I've written this for owners and managers of growing businesses who want to know which system solves which problem, using the way Oracle and Salesforce describe their own categories, and then a plain rule for which to put in first depending on where you are.
Front office and back office in plain words
Oracle's explainer draws the cleanest line. CRM systems support and connect front-office functions such as marketing, sales, advertising and customer service. ERP systems primarily support and connect back-office functions such as finance, supply chain operations and HR. Put simply, the CRM faces the customer and the ERP faces the business.
Oracle puts the split another way too: ERP software is primarily used for financial data and operations, while CRM is used on the sales and customer service sides. If you picture your business as a counter, the CRM is everything on the customer's side of it and the ERP is everything behind it.
What a CRM keeps track of
Oracle defines CRM as enterprise software that automates how a customer interacts with your business. In practice, it says a CRM tracks and stores the customer data you collect, including communications with sales representatives, proposals, purchase history and service requests. That's the record your team opens before a call, so nobody asks a customer something they've already answered.
Salesforce, which sells CRM software, says a CRM system helps businesses improve customer service relationships, assist in customer retention and drive sales growth. That's a vendor describing its own category, so read it as the job a CRM is meant to do rather than a promise. The common thread across both descriptions is the customer: who they are, what you've said to them and what they've bought.
What an ERP ties together
Oracle defines ERP as software used to manage day-to-day activities such as accounting, procurement, project management, risk management and compliance, and supply chain operations. The key word in its description is 'together': it says ERP systems tie together many business processes and enable the flow of data between them.
That's the difference you'd notice first. Without one, finance keeps its numbers in one place, purchasing in another and projects somewhere else, and someone spends the end of every month reconciling them. An ERP is built so those processes share one set of data. The ERP vendors' own pitch for this is a single source of truth across business processes.
ERP and CRM side by side, in no particular order
A short view of the two categories, alphabetical rather than ranked.
| Tool | Kind of system | Who it suits |
|---|---|---|
| CRM (customer relationship management) | Front-office software | Sales, marketing and service teams tracking customers |
| ERP (enterprise resource planning) | Back-office software | Finance, procurement, supply chain and HR on shared data |
CRM (customer relationship management)
Best for: Teams who need every call, proposal, purchase and service request with a customer kept in one record, which is how Oracle describes what a CRM stores.
ERP (enterprise resource planning)
Best for: Running accounting, procurement, projects, compliance and supply chain on one shared set of data. Vendor claim: a single source of truth across business processes.
Why one can't replace the other
Here's the line from Oracle's explainer that settles most arguments: many ERPs contain CRM features, but CRMs don't contain ERP features or handle transactional data. Oracle also says one can't replace the other. That's a software company that sells both telling you they're not interchangeable, and it's worth taking at face value.
So the real question for a growing business isn't ERP or CRM. It's which one you need first and how the two will connect. Oracle notes that CRM and ERP integration further reduces data silos, which is a polite way of saying that two systems that don't talk to each other recreate the problem you bought them to fix.
If you're at one of these stages
If you sell services and leads are slipping through: start with a CRM. Your pain is on the customer side: who you spoke to, what you proposed and when to follow up. That's exactly what Oracle says a CRM stores.
If you hold stock or run a supply chain and the books live in separate spreadsheets: look at an ERP. Your pain sits behind the counter, in accounting, procurement and operations, and the ERP's job is to put that data in one place.
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If an ERP vendor tells you theirs includes CRM: it may well, since Oracle says many ERPs contain CRM features. Check those features against a real day in your sales team's diary before you drop a separate CRM.
If a CRM vendor suggests it can run your finances: remember that Oracle says CRMs don't handle transactional data. Ask exactly where invoices, purchases and stock would live.
If you're growing on both fronts at once: plan for both systems and for how they'll connect from day one, because integration is what keeps the customer record and the financial record telling the same story.
The order I'd set them up in
For most small businesses I'd put the CRM in first, because winning and keeping customers is the bottleneck long before back-office data is. Bring in an ERP when finance, purchasing and stock start to need one shared set of data, and make sure the two can connect. If you're stock-heavy from day one, reverse that order.
When you're ready to compare CRM software, my guide to the best CRM for a small business, by team size is the place to begin. If you sell to other businesses, see the best CRM for B2B, and for the two biggest names head to head, read HubSpot vs Salesforce.
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Frequently asked questions
Is a CRM part of an ERP?
Sometimes. Oracle says many ERPs contain CRM features, but CRMs don't contain ERP features. Check whether an ERP's CRM features cover what your sales team does every day.
Can a CRM replace an ERP?
No. Oracle says CRMs don't handle transactional data, and that one can't replace the other.
Which does a small business usually need first?
If your bottleneck is finding and keeping customers, a CRM. If it's finance, purchasing or stock spread across separate tools, an ERP. Many businesses end up with both, connected.
What kind of data does an ERP hold?
Oracle says ERP software is primarily used for financial data and operations, covering activities such as accounting, procurement, project management, risk management and compliance, and supply chain.
Should my ERP and CRM be connected?
Oracle says CRM and ERP integration further reduces data silos, so if you run both, plan how they'll share data from the start.
Is accounting software the same as an ERP?
Accounting is one of the jobs Oracle lists for an ERP, alongside procurement, project management, risk management and compliance, and supply chain. An ERP ties those processes together, while a tool that only keeps the books covers one of them.
