NetSuite vs Custom ERP Software

What NetSuite does that you should not rebuild

Oracle NetSuite is a cloud ERP that covers the general ledger, payables, receivables, cash management, fixed assets, inventory, order management, procurement and financial reporting in one database. NetSuite OneWorld adds multiple subsidiaries, currencies and tax jurisdictions with consolidation, and its revenue management features handle multi element arrangements under ASC 606. Saved searches and SuiteAnalytics answer most reporting questions, and two major releases a year keep tax and accounting features current. Auditors know it, accountants can be hired who already use it, and your controller can close the books in it.

Tepia’s position is simple: do not build a custom general ledger. The rules are standardized, the audit stakes are high, and NetSuite has spent decades getting them right. Stay on NetSuite as is when:

• Your operations follow common order to cash and procure to pay patterns.
• Warehouse, sales and service teams are comfortable working in NetSuite screens.
• Customizations are a handful of fields, forms and SuiteFlow workflows.
• Nobody outside the company needs to act on ERP data.

Where NetSuite fits operations awkwardly

ERP is designed around transactions that accounting understands. Operations often run on concepts that are not transactions at all. Tepia sees these gaps most often:

• Shop floor work. A machinist needs a tablet screen showing the next operation, the drawing and a button to log scrap, not a work order form with forty fields.
• Configured products. Windows, trailers or industrial equipment with thousands of valid option combinations need a configurator with rules that produce a correct bill of materials.
• Field service and installation. Technicians need offline mobile apps with photos, signatures and parts used, which then post back as transactions.
• Dealers and customers. Partners want to check stock, place orders and see shipment status in a branded portal without NetSuite licenses.
• Heavy scripting. SuiteScript is capable, but large customizations run into governance usage limits, slow down record saves and need retesting with each release.
• Industry specific planning. Production scheduling across shared machines, route based distribution or lot genealogy for food safety often outgrow what configuration alone can do.

A full custom ERP that replaces NetSuite can make sense in rare cases, typically a company whose operations are highly unusual and whose accounting is simple. Even then, Tepia usually recommends keeping an accounting package such as QuickBooks or NetSuite for the books.

What to keep in NetSuite and what to build around it

Tepia uses this split as a starting point in Discovery. Each company moves a few rows, but the pattern holds for most mid market businesses.

The rows that move most often are item master and warehouse scanning. A distributor with tens of thousands of SKUs may want a fast search index outside NetSuite for its ordering portal, while NetSuite stays the owner of every item record and on hand quantity. Tepia documents each of these decisions in the Investigation Summary so finance, operations and IT agree on them before any code is written.

Connecting custom apps to NetSuite the right way

The integration is where these projects succeed or fail. Tepia connects custom apps through NetSuite’s REST web services, SuiteTalk SOAP where an older integration already uses it, and RESTlets when a specific operation needs server side logic inside NetSuite. Authentication uses token based authentication or OAuth 2.0 with a dedicated integration role that has only the permissions it needs.

On the custom side, a Node.js or .NET service queues every change, respects NetSuite’s concurrency limits, retries on failure and records each request and response. Each field has one owner: NetSuite owns items, customers and financial status; the shop floor app owns operation completions and scrap, then posts a summarized transaction back. That rule prevents the most common failure, two systems quietly overwriting each other. Our NetSuite integration and custom development and ERP integration services pages cover more patterns, and manufacturing and plant floor apps shows the operator side.

How Tepia approaches NetSuite and custom ERP projects

Tepia uses its six phases with finance and operations in the same room from the first week.

1. Discovery: a review of your NetSuite account, custom records, SuiteScripts, workflows and saved searches, plus floor walks and interviews with operators, supervisors and the controller. Deliverables are an Investigation Summary mapping each function to keep, extend or build, an Interview Summary, and User Stories such as a supervisor releasing a job to a machine.
2. Design: a system context diagram with record ownership, a design questionnaire, moodboards, a style guide and wireframes for tablets, scanners and portals.
3. Development and Testing: Alpha against a NetSuite sandbox and Beta on one line, warehouse or region, with test plans for sync accuracy, month end reconciliation and user acceptance by finance and operations.
4. Training: hands on sessions at the workstation or in the truck, using real jobs from your own data.
5. Launch: migration of open orders and work in progress, a cutover timed away from month end, and support reps on site or remote during rollout.
6. Support: issue resolution, regression checks ahead of each NetSuite release, and feature requests.

Expect Discovery to take about 1 to 3 months, development and QA 2 to 6 months, and launch roughly a month. Read our process or talk to Tepia about your ERP.

Frequently asked questions