The verdict in three sentences
For an SMB whose sales reps re-enter customers, quotes and orders between HubSpot and Sage or NetSuite, an off-the-shelf connector (EUR 100 to 400 a month) is enough as long as flows stay simple: customers, contacts and read-only invoices. As soon as you need two-way sync of quotes, items and price lists, with duplicate management, a custom integration at EUR 6,000 to 25,000 becomes more reliable and often cheaper over three years. Allow 4 to 10 weeks, including at least one week of data clean-up.
Off-the-shelf connector or custom integration
| Criterion | Off-the-shelf connector (HubSpot marketplace, iPaaS) | Custom integration |
|---|---|---|
| Initial cost | EUR 0 to 2,000 setup | EUR 6,000 to 25,000 |
| Recurring cost | EUR 100 to 400/month | EUR 50 to 250/month (hosting + maintenance) |
| Lead time | 1 to 3 weeks | 4 to 10 weeks |
| Synced objects | Customers, contacts, invoices | All, including quotes, items, price lists, discounts |
| Sync direction | Often one-way | Two-way with priority rules |
| Custom ERP fields | Limited | Unlimited |
| Duplicate handling | Basic (email) | Multiple keys (company number, email, customer code) |
| 3-year cost (example) | EUR 4,000 to 16,000 | EUR 8,000 to 34,000 |
Off-the-shelf wins for small teams with simple rules. Custom wins as soon as reps must produce a quote in HubSpot with the real ERP prices and discounts, then see invoicing and payment status without leaving the CRM.
What a well-built integration includes
| Work package | Content | Effort | Indicative 2026 price |
|---|---|---|---|
| Scoping | Object mapping, priority rules, data owner | 2 to 4 days | EUR 1,200 to 2,800 |
| Initial clean-up and de-duplication | Record merging, company number and address normalisation | 2 to 6 days | EUR 1,200 to 4,000 |
| Customer and contact sync | Two-way, real time or every 15 minutes | 3 to 6 days | EUR 2,000 to 4,500 |
| Quotes and orders | HubSpot to ERP creation with items and discounts | 4 to 10 days | EUR 2,500 to 7,500 |
| Invoices and receivables | ERP to HubSpot feed, overdue alerts | 2 to 5 days | EUR 1,200 to 3,500 |
| Monitoring | Error log, alerts, automatic retry | 1 to 3 days | EUR 600 to 2,200 |
| Testing and training | Tests on real data, team training | 1 to 2 days | EUR 600 to 1,500 |
An often forgotten point: the ERP's access model drives the price. NetSuite exposes a full REST and SuiteTalk API, which keeps costs at the lower end. Sage 50 or Sage 200 installed on a local server may require a gateway or database access: add EUR 1,000 to 3,000 if a gateway must be installed on your server.
Rules that prevent duplicate chaos
Define a system of record for each field: the ERP for customer code, payment terms and outstanding balance; HubSpot for contacts, lifecycle stage and lead source. Use the company registration number (CRO number in Ireland) as the main key for companies and email for contacts. Finally, block customer creation in the ERP outside the connector: without that rule, duplicates come back within weeks.
Mini case study
Thomas, sales director of an industrial supplies SMB in Dublin (9 reps, 1,800 active customers), estimates each rep loses 4 hours a week re-entering and searching for information between HubSpot and Sage. He chooses a custom integration at EUR 14,500, plus EUR 120 a month for maintenance and hosting.
Gain: 9 reps × 4 h × 45 weeks = 1,620 hours a year. At EUR 48 per loaded hour, that is EUR 77,760 a year. Even counting only half that time as genuinely reinvested in prospecting, the gain reaches EUR 38,880. First-year cost: 14,500 + 1,440 = EUR 15,940. Payback in about 5 months, with 340 duplicates merged at launch as a bonus.
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FAQ
Is there a ready-made HubSpot to Sage or NetSuite connector?
Yes, several vendors and iPaaS platforms offer one for EUR 100 to 400 a month. They cover customers and invoices well, but rarely quote creation with the ERP's specific price lists and discounts.
Should we move our ERP to the cloud first?
Not necessarily. A recent on-premise version with an access gateway is enough. Migration makes sense if you are already changing infrastructure, but it adds 4 to 8 weeks to the project.
What happens if the sync breaks?
A well-designed integration queues messages and automatically replays failures. An email alert fires after 3 consecutive errors, and a log lets you fix issues in under an hour.
How long does it really take?
Allow 4 to 6 weeks for customers, contacts and invoices, and 8 to 10 weeks if quotes, items and price lists are in scope.
Does it also work with Xero, Sage 50 or Business Central?
Yes, the logic is identical. Cost mainly depends on data access: from EUR 6,000 with a clean API to EUR 12,000 and more with a local database and no API.
Let's scope your project. Tell us your ERP version, HubSpot subscription and the objects to sync: we will price an off-the-shelf connector or a custom integration between EUR 6,000 and 25,000, delivered in 4 to 10 weeks. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
