ERP Integration Services, No Re-Entry
Your ERP is only as good as what it talks to. We connect storefronts, payment gateways, banks, carriers, EDI partners and CRMs, so a record entered once flows everywhere and your teams stop re-typing each other’s work.

- 150+clients on three continents
- 100+in-house specialists
- 2018founded, clients retained since
- 5.0on Clutch, 4.8 on Google
ERP integration methods,
honestly compared
Native connectors
The integration your ERP vendor already ships. Always our first check, because the best custom connector is the one you never pay for.
REST and XML-RPC APIs
Direct API integration between systems for reads and writes. Right when both sides have solid APIs and the data model is stable.
Webhooks and events
The system pushes changes the moment they happen instead of being polled. Right for orders, payments, and anything time-sensitive.
Middleware and iPaaS
A translation layer such as custom middleware, n8n, or an iPaaS when many systems must talk or data needs reshaping in flight.
EDI
The document standard big retail and distribution partners still require. Unglamorous, strict, and very automatable.
Point-to-point scripts
Quick custom bridges between two systems. Fine as a stopgap; a liability as an architecture. We tell you which one you are buying.

What is ERP integration?
ERP integration, also called ERP system integration, is connecting your ERP to the other software your business runs, so data entered once flows everywhere automatically. An order placed on your storefront becomes a delivery, an invoice, and a ledger entry without anyone re-typing it. The alternative is what most growing companies live with: five systems, four exports, and numbers that never quite agree.
What systems does an ERP integrate with?
The usual suspects: eCommerce platforms and marketplaces, payment gateways, accounting tools, CRMs, shipping carriers and 3PLs, EDI trading partners, bank feeds, payroll, and whatever in-house tool your operation secretly depends on. If it holds data and has an API, it can join the flow.
Why integrations fail, and why ours ship with a reconciliation
Most integration failures are mapping failures: two systems disagreeing about what a customer, an order, or a refund is, discovered in production. We settle those questions on paper first, then prove the connection by reconciling record counts and financial totals between both systems before go-live. For anything touching money, that check is designed by a team with a CPA in its leadership.
What our ERP integration services cover
Commerce, money, logistics, customers, and data, connected by one in-house team and reconciled before anyone relies on the numbers.
Storefronts and channels in one flow: Shopify, BigCommerce, Amazon, and WooCommerce orders land in your ERP as one stream instead of four inboxes.
Stock that matches everywhere: Inventory updates flow back to every channel, so overselling stops being a weekly apology.
Tax and pricing kept straight: Channel-specific tax and price rules are handled at the sync layer, not by hand.
Proof, not promises: We run exactly this stack in production for a US door-hardware brand across three channels.

Payment gateways wired in: Stripe, PayPal, and Authorize.net transactions post to the ledger with fees split out correctly.
Bank feeds that reconcile: Statements arrive automatically and matching happens in the system, not in a spreadsheet.
Accounting handoffs done right: QuickBooks and Xero balances move with debits equal to credits, checked by accountants.
A CPA behind the mapping: Every financial integration is designed with accounting integrity first, sync mechanics second.

Carriers and rates in the order flow: UPS, FedEx, and regional carriers quote and label from inside the ERP.
Dropship and 3PL orchestration: Purchase orders, tracking, and partial deliveries sync both ways with vendors and warehouses.
EDI without the pain: Retail and distribution EDI documents translated and posted automatically.
Built on a live example: A US wholesale distributor runs order and shipping sync with partial deliveries through us today.

CRM and ERP on one customer record: Salesforce or HubSpot activity and ERP orders stop living in parallel universes.
Ad clicks tied to closed revenue: We wire Google Ads click IDs through the CRM to the invoice, so you see which campaigns actually pay.
Quotes that become opportunities: Quotation and pipeline data sync so forecasts rest on real numbers.
Attribution proof in production: Two US clients run this ad-to-revenue loop live; the case studies below name them.

Warehouses and pipelines: Clean data engineering under your reports, so every system feeds one version of the truth.
Dashboards on live data: Power BI reads from the integrated stack, and leadership stops waiting for exports.
AI on top of the integration: Once systems are connected, agents can act across them: follow-ups, matching, reconciliation.
Ask your systems questions: Our published AI connector lets teams query connected ERP data from Claude or ChatGPT in plain language.

Related work: business process automation, data engineering, Power BI reporting, and our published AI connector.

Integrations we have shipped, with the clients running them
Generic platform lists are easy to write. These are live: a US door-hardware brand runs BigCommerce, Amazon, and Shopify unified into one order flow with tax handled per channel. A packaging manufacturer traces every closed deal back to the Google Ads click that started it. A wholesale distributor runs order and shipping sync with partial deliveries handled automatically. And when clients outgrow QuickBooks, their balances move over reconciled to the cent.
An ERP integration consultant, before any code
An integration consultant earns their fee by telling you which connections pay back first, which can wait, and which should be a native connector instead of custom work — the same workflow-first thinking behind our ERP consulting practice. If the systems on either side of a connection are still open to debate, settle that in ERP selection first. If one of them is about to be replaced, our ERP implementation and ERP migration teams sequence the work so you connect once instead of twice.
Already running Odoo?
Then your integration options are wider and often cheaper, because we work in Odoo’s APIs daily and publish our own connector for it. The deep dive lives on our Odoo integration services page.
The systems we integrate
We build and maintain connections into all of these, in both directions. Whatever sits on either end, the same rule applies: one record, entered once, reconciled so the two systems agree.
How an Integration Project Runs

Why teams choose Index World for integration
Shipped proof, on the record
Our integration claims link to named clients running them in production. Ask the field to name theirs.
CPA-grade reconciliation
Financial integrations are checked the way accountants check them: totals matched between systems, in writing, before go-live.
Fixed fee per connection
Each integration is scoped and priced in writing before we build. No hourly billing and no meter running while an API misbehaves.
One in-house team
The people who map your workflow, write the connector, and support it afterward sit on the same team of 100+ specialists.
We ship integration product
Our AI connector is published on a public app marketplace and runs with six security layers. We build connectors for a living, not per project.
Monitored after go-live
Logging, retries, and alerting are part of the build. When a third-party API changes, we know before your team does.
Every good system starts with a conversation. Talk to our team →
Connected systems, in production
The integrations described above, told by the businesses running them.
Solutions for Every Industry
From manufacturing to multi-channel retail, we tailor ERP, accounting, reporting and automation to the way your industry actually works. Explore the solution built for yours.

How much does ERP integration cost?
Published industry guides put a single integration anywhere from three to fifteen thousand dollars, with consultant rates of 150 to 350 dollars an hour. Treat those as industry figures, not our quote. We price each connection as a fixed fee, agreed in writing after the systems audit, with no hourly billing.
What moves the number
How many systems join the flow, whether data needs reshaping in flight, how clean the existing records are, and whether EDI partners are involved. The systems audit prices each connection separately, so you can start with the one that pays back fastest.
ERP integration, answered.
What is ERP integration?
ERP integration is connecting your ERP to the other systems your business runs, such as your storefront, payment gateway, shipping carriers, bank, CRM, and payroll, so data entered once flows everywhere automatically. Done well, it ends double entry and gives every department the same numbers.
What systems does an ERP integrate with?
The common set: eCommerce platforms like Shopify, BigCommerce, and Amazon; payment gateways like Stripe and PayPal; accounting tools like QuickBooks and Xero; CRMs like Salesforce and HubSpot; shipping carriers and 3PLs; EDI trading partners; bank feeds; and any in-house application with an API.
What are the main ERP integration methods?
Five, roughly in order of preference: native connectors your ERP vendor already ships, direct REST or XML-RPC API connections, event-driven webhooks, middleware or iPaaS platforms for many-to-many flows, and EDI for trading partners that require it. The right answer is per connection, not per project.
How much does ERP integration cost?
Published industry guides put a single integration anywhere from three to fifteen thousand dollars, with consultant rates of 150 to 350 dollars an hour. Treat those as industry figures, not our quote. Index World prices each connection as a fixed fee in writing, so the number you approve is the number you pay.
How long does an ERP integration take?
A single well-documented connection typically runs two to six weeks from mapping to reconciled go-live. Multi-system architectures with EDI or heavy data reshaping take longer. The systems audit gives you a per-connection timeline before anything is built.
What is ERP middleware?
Middleware is software that sits between systems and translates: it receives data from one side, reshapes it, applies rules, and delivers it to the other. You need it when several systems must stay in sync or when two tools disagree about what an order or a customer looks like.
Do we need an iPaaS like Boomi or Celigo?
Sometimes, and when you do we will say so. iPaaS platforms earn their subscription when you have many systems and frequent changes. For a focused stack, direct APIs and lightweight middleware are usually cheaper to run. We recommend per case and take no vendor commissions either way.
Is Excel an ERP tool?
No, though it is the most common ERP substitute in the world. Spreadsheets hold data; an ERP runs processes: orders, stock, invoicing, approvals, and reporting in one connected flow. If your operation runs on spreadsheets passed between people, that is usually the sign it has outgrown them.
What happens when a connected API changes or breaks?
Our integrations ship with logging, automatic retries, and alerting, and we track upstream API deprecations under support. When a third party changes something, we are alerted, we fix the connector, and we reconcile anything that queued during the gap. Your data stays consistent.























