Accounting and Finance
QuickBooks, Xero, Sage, Zoho Books, FreshBooks, Wave, NetSuite
50+ integrations delivered, fixed price, 4 to 8 weeks
ERP integration services, connect any system
Connect your ERP to accounting, CRM, POS, e-commerce, shipping and payment systems.
A custom ERP only pays off when it talks cleanly to the rest of your stack. Our ERP integration services connect your custom ERP software, or any off-the-shelf ERP like Odoo, NetSuite, or Microsoft Dynamics, to QuickBooks, Xero, Salesforce, HubSpot, Stripe, Shopify, Amazon, FedEx, UPS and DHL. Real-time sync, retry-safe APIs, and a migration plan you can actually execute.
What are ERP integration services?
ERP integration services connect your ERP software with the other tools your business depends on so data flows automatically between them. Instead of copy-pasting invoices from the ERP into QuickBooks, stock levels from Shopify into the ERP, or customer records from Salesforce into the CRM module, everything syncs, in real time or on a schedule, through APIs, webhooks, and message queues. Done right, integrations eliminate duplicate data entry, remove errors, and give leadership one clear, reliable view of the data.
New to the topic? Start with what ERP software actually is, then come back for how it connects to the rest of your stack.
What systems can you integrate with an ERP?
You can integrate an ERP with almost any system that exposes an API: accounting tools like QuickBooks and Xero, CRMs like Salesforce and HubSpot, HRM and payroll platforms, POS and retail systems, e-commerce stores, shipping carriers, payment gateways, cloud collaboration suites, and BI tools. The nine categories below cover the tools we integrate with your ERP most often.
Using something not listed? We build from any REST, GraphQL, SOAP or webhook-based API.
CRM
Salesforce, HubSpot, Zoho CRM, Pipedrive, Microsoft Dynamics 365
HRM and Payroll
BambooHR, Workday, Gusto, ADP, Rippling, Sage People
POS and Retail
Shopify POS, Square, Clover, Lightspeed, Toast, Timeline POS
E-Commerce
Shopify, WooCommerce, Magento, Amazon Seller Central, eBay, BigCommerce
Shipping and Logistics
FedEx, UPS, DHL, ShipStation, EasyPost, Shippo, SAP TM
Payment Gateways
Stripe, PayPal, Adyen, Braintree, Razorpay, Square Payments
Cloud and Collaboration
AWS, Azure, GCP, Microsoft 365, Google Workspace, Slack, Teams
BI and Analytics
Power BI, Tableau, Metabase, Looker, Google Analytics 4, Mixpanel
Three integration approaches, and when to pick each
Point-to-Point
Direct API integration between two systems. Simplest, cheapest, fastest. Right choice when you have 1 to 3 integrations total.
Best for: Small teams, limited integration count
Event-Driven
Asynchronous events through a message queue or event bus. Retry-safe, scalable, decoupled. Right choice when you have 5+ integrations or need real-time sync.
Best for: Growing mid-market companies
Middleware or iPaaS
Platforms like MuleSoft, Zapier, or Make handle the orchestration. Faster to start, but adds a vendor cost. Right choice for non-technical teams with many lightweight integrations.
Best for: Operations-led integrations at scale
How to choose in practice. Point-to-point is the right default when the map of your systems fits on a napkin: the ERP talks to QuickBooks, and maybe to Shopify, and that is it. Each connection is a small, self-contained piece of code that is cheap to build and easy to reason about. The trap is growth: at five or six systems, every new tool needs a connection to several existing ones, and a change to the ERP's data model means touching every pipe at once.
Event-driven integration avoids that trap by decoupling the systems. When an order is created, the ERP publishes one event to a queue; the accounting sync, the shipping label job, and the BI pipeline each consume it independently. If the accounting API is down for an hour, its consumer simply catches up when it returns, and nothing else is affected. The cost is more infrastructure, a message queue, consumer workers, and monitoring, which is why it earns its keep at five or more integrations or wherever near-real-time sync matters.
Middleware and iPaaS platforms trade code for configuration. They shine when operations staff, not engineers, own the integrations, and when the flows are lightweight, moving a form submission into the CRM, or a CRM update into a spreadsheet. For high-volume, transactional ERP data, per-task pricing and per-connector limits usually make a coded integration cheaper within the first year or two.
What happens when a sync fails?
Every integration fails eventually: an API rate limit, an expired token, a vendor outage, a record that breaks a validation rule. The difference between a good integration and a liability is not whether it fails, it is whether the failure is visible, recoverable, and impossible to double-post.
Retries that cannot double-post
Failed calls are retried with exponential backoff, waiting longer between each attempt so a struggling API is not hammered. Every write carries an idempotency key, so if the same invoice is submitted twice because a response timed out, the receiving system records it once. Without this, retries silently create duplicate invoices and double-counted stock.
Dead-letter queues, not silent drops
A record that still fails after its retry budget, usually because the data itself is bad, moves to a dead-letter queue with the full error attached. Someone is alerted, the record is fixed or excluded deliberately, and nothing disappears without a trace. The worst integrations are the ones that skip bad records quietly and let the books drift.
Scheduled reconciliation
Real-time sync catches events as they happen; reconciliation catches everything it missed. A scheduled job compares record counts and totals between the two systems, yesterday's invoice total in the ERP against yesterday's total in the ledger, and flags any gap before month-end close finds it the hard way.
Monitoring and alerting
Queue depth, error rate, and time-since-last-successful-sync are tracked per connection, with alerts when any of them drifts. An integration that has quietly stopped is the most expensive kind of failure, because every day it stays unnoticed adds a day of catch-up and correction.
Two worked examples
The same engineering pattern, applied to the two integrations we are asked about most often.
ERP to QuickBooks: ledger sync
The goal is simple to state: every invoice, payment, and credit note raised in the ERP appears in QuickBooks once, in the right account, without anyone retyping it. The build starts with mapping, matching the ERP's items, tax codes, and customers to QuickBooks accounts and entities, and deciding the rules for records that exist in one system but not the other. Sync then runs on posted transactions: when an invoice is finalized in the ERP, a worker pushes it to the QuickBooks API with an idempotency reference tied to the ERP invoice number, so a retried push can never post twice.
The part that separates a reliable ledger sync from a fragile one is reconciliation: a nightly job totals each day's postings on both sides and flags any difference, so a mismatch surfaces the next morning rather than at month-end close. Edge cases are handled as policy decisions made with your accountant, not silent code defaults: partial payments, multi-currency invoices, voids and refunds after posting each get an agreed, documented rule.
ERP to Shopify: stock sync
Here the flow runs both ways. Downstream, a Shopify order webhook decrements ERP stock and creates the sales record within seconds of checkout. Upstream, goods received, transfers, and adjustments in the ERP push new available-to-sell quantities back to Shopify, so the store never sells stock that was just counted out. SKU mapping is the foundation, including bundle products that consume several ERP items per sale.
The hard problem is the race condition: two channels selling the last unit in the same minute. The integration treats the ERP as the source of truth, applies a configurable safety buffer on fast-moving SKUs, and confirms oversold orders against real stock before they reach the warehouse. Webhooks are backed by a scheduled full-quantity comparison, because a single missed webhook is invisible until a customer orders something that is not there. Failures land in the same dead-letter-and-alert pipeline described above, so a dropped update is a ticket, not a mystery.
Both examples assume a custom ERP, but the same patterns apply when we connect Odoo, NetSuite, or Dynamics to your stack.
How does ERP integration work?
ERP integration works in six stages: map every data field between systems, set up API authentication and sandboxes, build the connection with retry logic and idempotent workers, run end to end tests on production equivalent data, cut over with historical backfill, then monitor for API changes. Here is our ERP integration delivery process.
1
Data mapping
1 weekWe document every field, every entity, every transformation. This is the single most skipped step, and the number one reason integrations fail.
2
API authentication and sandbox setup
3 to 5 daysOAuth or API key setup, sandbox environment for every connected system, test accounts, rate-limit review.
3
Build and unit test
2 to 4 weeksBuild the integration with idempotent workers, retry logic, and conflict resolution. Unit tests on every mapping.
4
End-to-end integration test
1 weekRun production-equivalent data through the integration. Validate every edge case. Generate a test report.
5
Cutover and go-live
2 to 5 daysBackfill historical data, switch to live APIs, monitor closely for the first 72 hours. Hypercare support for 2 weeks.
6
Ongoing support
Month-to-monthMonitor for API deprecations, schema changes, and rate-limit issues. Fix within 4 business hours on SLA.
ERP integration services FAQs
What are ERP integration services?
ERP integration services connect your ERP with the other tools your business runs. Accounting, CRM, HRM, POS, shipping, payment gateways, e-commerce and BI. Done well, integrations eliminate duplicate data entry, sync data in real time, and give leadership one source of truth.
What is the difference between ERP integration and ERP customization?
ERP customization changes how the ERP itself behaves. New modules, new fields, new workflows. ERP integration connects the ERP to other systems so data flows between them. Most projects involve both. Timeline Digital offers both as part of the same engagement.
How much do ERP integrations cost?
A simple point-to-point integration, such as ERP to QuickBooks or ERP to Shopify, costs $3,000 to $8,000. A complex many-to-many integration across ERP, Salesforce, Stripe and FedEx costs $10,000 to $30,000. Ongoing maintenance is typically 10 to 15 percent of the build cost per year as APIs evolve.
Do you offer ERP integration pricing in Pakistani rupees?
Yes. For Pakistani businesses, we quote ERP integration work in PKR rather than converting from USD, with the same milestone-based payments we use on our other ERP projects. Cost still depends on how many systems you are connecting and how complex the data mapping is. Contact us for a fixed PKR quote after a quick look at your systems.
How long do ERP integrations take to build?
Simple REST-API integrations take 1 to 3 weeks. More complex integrations with data transformation, conflict resolution and real-time sync take 4 to 8 weeks. Legacy SOAP integrations or connecting to on-premise systems can take 8 to 16 weeks.
What technologies are used for ERP integration?
We use REST APIs, GraphQL, webhooks, and message queues such as AWS SQS or RabbitMQ. For real-time sync we use event-driven architectures. For batch sync we use scheduled jobs with idempotent workers. We prefer native APIs over middleware when possible, fewer moving parts, lower cost.
Can you integrate with legacy on-premise systems?
Yes. Many mid-market ERPs still connect to legacy databases such as Oracle, MSSQL or AS/400, or to SOAP APIs. We build secure bridges using VPN tunnels, middleware adapters, or direct database replication depending on the constraints.
Do you handle ERP migration as part of integration services?
Yes. When you move off SAP, Oracle, Odoo or NetSuite to a custom ERP, we handle data migration, historical record preservation, and a cutover plan that minimizes downtime. Most mid-market migrations complete in 2 to 4 weekends of controlled cutover.
Get your ERP integration scoped in 48 hours
Tell us which systems you need connected and what data should flow both ways. We send back a clear, written scope after a quick look at what you need.