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.

Operations manager with a tablet and warehouse worker scanning a package on an integrated ERP flow
  • 150+clients on three continents
  • 100+in-house specialists
  • 2018founded, clients retained since
  • 5.0on Clutch, 4.8 on Google
Methods

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.

Two colleagues reviewing connected storefront and order dashboards with a parcel ready to ship

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 We Connect

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.

eCommerce & Marketplaces

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.

Payments, Banks & Accounting

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.

Shipping, 3PL & EDI

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.

CRM & Marketing Attribution

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.

Data, BI & AI

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

Warehouse deliveries running on integrated order and shipping systems

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.

Platforms

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.

Odoo logoOdoo
NetSuite logoNetSuite
Sage logoSage
Dynamics 365 logoDynamics 365
SAP Business One logoSAP Business One

How an Integration Project Runs

Magnifying glass and calculator reviewing a chart during a systems audit

We start by cataloging every system you run, what data lives where, and which handoffs happen by hand. The re-typed order, the emailed spreadsheet, the Friday export: each one is a cost we write down. The output is a map of your stack with the manual seams marked.

  • Inventory of systems and owners

    Every tool, who uses it, and what data it holds, from the storefront to the ledger.

  • The manual seams

    Where people re-type, reconcile, or carry data between systems, and what each seam costs monthly.

  • Priority order

    Not everything should be integrated at once. We rank connections by payback, not by novelty.

Hands with a calculator and notebook beside a laptop showing a data table

Before anything connects, we agree what the data means. Which system owns the customer record. What happens when both sides change the same order. How refunds, partial shipments, and edge cases flow. ERP data integration fails on mapping, not on code, so this step is written down and signed.

  • Field-by-field mapping

    Every synced field has a source of truth, a direction, and a transformation rule.

  • Conflict and duplicate rules

    What wins when systems disagree, decided on paper before it happens in production.

  • Financial integrity rules

    For anything touching money, the mapping is reviewed with accounting logic, not just field names.

Reviewing a flowchart on a whiteboard while choosing an integration method

Each connection gets the cheapest reliable method, checked in this order: native connector, direct API, webhooks, middleware, EDI. You see the reasoning and the cost per connection before anything is built, and if a native connector covers it, that is the recommendation you get.

  • Native-first check

    We do not rebuild what your ERP vendor already ships. Custom work is for real gaps.

  • Architecture you can read

    A one-page diagram of what connects to what, and through which method, kept current.

  • Fixed fee per connection

    Each integration is priced in writing before the build starts.

Two developers coding side by side, building integrations

We build in a staging environment against real sample data, never live against production. Connectors handle authentication, rate limits, retries, and the failure cases APIs actually throw. The boring engineering is the product: an integration is only as good as its worst Tuesday.

  • Staging first

    Every connector proves itself on staging data before it touches a production record.

  • Failure-case handling

    Timeouts, rate limits, and malformed payloads are handled and logged, not discovered later.

  • Security by default

    Keys stored properly, least-privilege access, and no third-party relay for your data.

Two people comparing printed reports side by side to reconcile totals

Before go-live we run both systems side by side and reconcile: record counts, order totals, and financial balances matched between source and destination. For accounting integrations that reconciliation is signed off the way a CPA would sign it, because one of ours does.

  • Side-by-side validation

    Real transactions flow through both paths and the results are compared line by line.

  • Financial reconciliation

    Balances and totals matched and documented before the switch is thrown.

  • Your team in the loop

    The people who live with the integration see it work and sign off on the flows.

Two support agents with headsets reviewing a screen together

Integrations decay: APIs version, partners change formats, volumes grow. Ours ship with logging, alerting, and retry logic, and we watch them under a support arrangement with US-hours response. When something breaks upstream, we are usually fixing it before you notice.

  • Alerting and retries built in

    Failed syncs retry automatically and page us when they should not.

  • API change management

    Version deprecations are tracked and handled before they take a sync down.

  • Room to grow

    New channels, new warehouses, and new systems join the architecture without a restart.

Index World consultants working with a client team on an ERP decision

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 →

Case Studies

Connected systems, in production

The integrations described above, told by the businesses running them.

Industries We Serve

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.

Two people pointing at itemized line items on an integration quote

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.

Book a free systems review

FAQs

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.

Build the systems your business needs