The verdict in three sentences
Connecting HubSpot and Odoo so that a won deal automatically creates the company, contact and quotation in the ERP removes 15 to 25 minutes of re-keying per deal and the errors that come with it. An off-the-shelf connector (30 to 200 EUR a month) is enough for simple contact sync, while a two-way sync of companies, products, quotations and invoice statuses justifies a custom build at 4,000 to 15,000 EUR excl. VAT, delivered in 3 to 6 weeks. The real difficulty is not technical: it is the deduplication rules and choosing the master system for each piece of data. These ranges apply equally to SMBs in Dublin, Amsterdam or Lyon.
The three routes and what they cost
| Option | 2026 upfront cost | Recurring cost | Best for |
|---|---|---|---|
| Off-the-shelf connector (iPaaS or marketplace app) | 0 to 500 EUR setup | 30 to 200 EUR per month | Contacts and companies, one-way or simple two-way |
| No-code workflows (Make, n8n, Zapier) | 1,500 to 4,000 EUR excl. VAT build | 20 to 150 EUR per month in tooling | Won deal to Odoo quotation, medium logic |
| Custom API development | 4,000 to 15,000 EUR excl. VAT | Maintenance 1 to 2 days per quarter | Full two-way, products, quote lines, invoice statuses |
| Dedicated Odoo module installed in the ERP | 6,000 to 15,000 EUR excl. VAT | Updates at each major Odoo version | Odoo.sh or self-hosted Odoo only |
A point often discovered too late: Odoo Online's external API is not available on the Standard plan; you need the Custom plan, Odoo.sh or your own server. On the HubSpot side, custom objects and some automations require a Pro edition, and the API enforces request limits that a bulk import can hit.
Data mapping, the heart of the project
| HubSpot object | Odoo object | Direction | Rule to decide |
|---|---|---|---|
| Company | Partner (company) | HubSpot to Odoo | Dedupe on company registration or VAT number, then email domain |
| Contact | Partner (linked contact) | Two-way | Email as key, Odoo master for billing address |
| Product | Product (product.template) | Odoo to HubSpot | Odoo master for prices and references |
| Won deal | Quotation (sale.order) | HubSpot to Odoo | Created only at the 'won' stage, once |
| Deal line items | Quotation lines | HubSpot to Odoo | Discount and tax recomputed by Odoo |
| Invoice status | Deal property | Odoo to HubSpot | Paid, overdue, cancelled, visible to the sales rep |
| Owner | Odoo salesperson | HubSpot to Odoo | User mapping table |
Each row of this table is half a day to a day of work, testing included. A 4-object project sits around 4,000 to 7,000 EUR excl. VAT; at 7 objects with error handling, automatic retries and a sync log, it reaches 10,000 to 15,000 EUR excl. VAT.
Typical 3 to 6 week timeline
| Week | Step | Deliverable |
|---|---|---|
| 1 | Mapping workshop with sales and accounting | Table of objects, fields, direction, master system |
| 1 to 2 | Cleaning and deduplicating both databases | Duplicate report, approved merges |
| 2 to 4 | Development and test environment | Sync running on a copy of Odoo |
| 4 to 5 | Acceptance on 30 to 50 real deals | Variances fixed, rules adjusted |
| 5 to 6 | Go-live and monitoring | Error log, email alerts |
Up-front cleaning is the most underestimated item: it is common to find 10 to 20% duplicate companies between the two databases.
Mini case study
Thomas, sales director of an industrial SMB in Lyon (illustrative case), closes 120 deals a month in HubSpot. His assistant re-keys each deal into Odoo in 20 minutes, i.e. 40 hours a month. At a loaded cost of 45 EUR an hour, that is 1,800 EUR a month, not counting about 3% of quotations with a price or reference error. A custom connector covering companies, contacts, products, quotations and invoice statuses is quoted at 9,000 EUR excl. VAT, plus 1,500 EUR a year of maintenance. Payback: about 5 months, and the assistant spends those 40 hours chasing unsigned quotes.
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FAQ
Can a 50 EUR a month connector be enough?
Yes, if you only sync contacts and companies and create quotations by hand. Once product lines and invoice statuses come into play, these connectors reach their limits and the re-keying returns.
Which system should be the data master?
As a rule, HubSpot owns the prospect and the deal, Odoo owns products, prices, billing addresses and invoices. Writing this rule down for each of the 7 objects before development avoids 80% of conflicts.
What happens if the sync fails?
A good connector logs every failure, retries automatically 3 times, then sends an email alert. Without this mechanism, a token error can block quotation creation for several days.
Do we need to change Odoo plan?
On Odoo Online, the external API requires the Custom plan; on Odoo.sh or a dedicated server it is available. Check this in week one, as it can add a few tens of euros per user per month.
How much does maintenance cost?
Allow 1 to 2 days per quarter to follow HubSpot API changes and Odoo versions, i.e. 1,500 to 4,000 EUR excl. VAT a year. A major Odoo version upgrade sometimes needs 2 to 3 extra days.
Let's scope your project. Send us the list of objects to sync, your HubSpot and Odoo editions and your deal volume, and we will price a connector between 4,000 and 15,000 EUR excl. VAT with a 3 to 6 week plan. 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.
