Odoo migration
Upgrade Odoo without losing the data, custom modules and integrations the business depends on. Every migration we run is rehearsed on a copy first, with the custom code ported and the integrations re-tested, so go-live is a repeat of something that already worked.
Reviewed by Atul Makwana, CEO & Co-Founder, Heliconia Solutions · Odoo 16 Functional Certification · Odoo Partner · Updated
Businesses that run on what we built
Migration scenarios
Different migrations carry different risks. Naming yours is the first step of the assessment.
Odoo 16 → 19, 17 → 18: database upgrade, custom-module migration, integration re-testing and a go-live plan. We have done these on Odoo.sh and self-hosted.
Between Enterprise versions: via Odoo's upgrade service for the standard database plus our migration of every custom module.
Community deployments, where the standard database upgrade is done with OpenUpgrade and OCA tooling alongside the custom modules.
Assess which Enterprise features you depend on, replace them with Community or OCA equivalents, migrate data and drop the licence.
Update custom code, yours or another partner's, for the target version: API changes, view changes, deprecated fields, data migrations.
On-premise to Odoo.sh or cloud, or the reverse, with attachments, cron jobs, mail servers and integrations moved and verified. The hosting options are compared on the Odoo hosting page.
Complexity
Odoo migration difficulty is driven by the version gap, the number and quality of custom modules, database size, third-party integrations, data quality, the edition, and how business-critical the system is, not by the size of the company.
Custom modules are almost always the largest risk. A migration of a clean, standard database is largely a solved problem. A migration of forty custom modules written against three different versions by two different teams is an engineering project, and it needs to be scoped as one.
Integrations are the second. Every external system that talks to Odoo (payment terminals, storefronts, mobile apps, CRMs) has to be tested against the target version, because APIs and models change between releases.
What gets migrated
| Area | What is included | How we assess it |
|---|---|---|
| Master data | Products, customers, vendors, chart of accounts, pricelists | Volume, duplicates, mapping to new fields |
| Transactions | Sales, purchases, invoices, stock moves, manufacturing orders | History depth to keep, referential integrity |
| Accounting | Journals, payments, reconciliations, fiscal settings | Localization changes between versions, closed periods |
| Custom modules | Every addon not in standard Odoo | Compatibility per module, core edits, test coverage |
| Integrations | APIs, webhooks, terminals, storefronts, mobile apps | API/model changes in the target version |
| Attachments | Documents, images, reports | Storage backend, size, S3 vs filestore |
| Users and access | Accounts, groups, record rules | Security model changes, deprecated groups |
| Configuration | Company settings, automated actions, sequences | Settings that moved or were removed |
| Reports | QWeb, Excel, spreadsheet dashboards | Template compatibility, redevelopment need |
Migration process
The production migration is the last step, and by then it has already been run at least once.
Current version, edition, hosting, custom modules, integrations, data volume, downtime tolerance and the business reasons for migrating now.
Module-by-module compatibility review, core-modification detection, integration inventory and a risk register. This is the migration assessment.
Sequence, what's migrated versus archived, what's replaced by OCA or standard features, downtime window, rollback plan, sign-off criteria.
Custom modules migrated to the target version, replacements built where a module is retired, integrations updated for API changes.
A full migration of a production copy into a staging environment. Timed, logged, repeatable.
Record counts, balances, stock quantities and sample documents compared old-to-new, with the business checking its own critical data.
Process owners run real scenarios on the migrated staging system, including every integration. Defects fixed, migration re-run.
The rehearsed procedure on the live database, in the agreed window, with the rollback plan ready.
Users on the new version, integrations switched, monitoring on.
The migration team stays close for the first weeks: fast fixes, performance checks, the questions that only appear in real use.
Enterprise to Community
Yes. Migrating Odoo Enterprise to Community means identifying the Enterprise-only features the business uses, replacing them with Community or OCA modules (or custom development where nothing exists), migrating the database, and re-testing the system: after which the Enterprise licence is no longer needed.
Much of what businesses use daily is in both editions: sales, purchase, inventory, CRM, invoicing, manufacturing. Enterprise-specific features (Studio, Documents, Sign, Planning, some accounting reports, the mobile app and Odoo.sh hosting) each need an answer: an OCA module, a custom module, or a decision that the feature isn't needed.
We run this as a technical assessment first, so you know the cost of leaving before you commit. Licensing, hosting and support change with the edition, and they belong in the same decision.
Migration readiness assessment
Tell us your current and target version, edition, users, database size, custom modules, integrations and hosting. You get a readiness rating (low, moderate, high, complex) and what drives it.
Evidence
Version upgrades with custom modules, on Odoo.sh and self-hosted, for businesses that couldn't afford to stop.
ERP consulting (Odoo partner)
Heliconia developers working as an extension of another Odoo partner’s engineering department: multiple client migrations from Odoo 17 to 18 Enterprise, custom module upgrades, Odoo.sh operations, and Monday.com, Calendly and Zapier integrations.
Cloud managed services
Accounting, HR and payroll, projects and timesheets, subscriptions, helpdesk and CRM on Odoo 18 Enterprise, with custom modules migrated from earlier versions and financial reporting built for a recurring-services business.
Retail & wholesale, duty-free
Four Caribbean island entities (each with its own payroll law, currency, fiscal rules and eCommerce site) unified on one Odoo 16 Enterprise platform with a shared core and per-island customization packages.
First-party experience
Custom modules are the largest migration risk. Assess them per module, not as a count.
Integrations must be tested against the target version. A payment terminal or storefront that worked on 16 isn't guaranteed on 18.
Data quality problems become visible during migration. Budget for cleansing. Don't discover it in the production window.
The test migration isn't optional. It's how you learn the real duration, the real failures and whether the rollback plan works.
Migrating other teams' modules means first finding their core edits. Every inherited system has had some.
What clients say
Heliconia's Odoo Enterprise implementation, along with third-party system integration, has optimized our processes. Their expertise has been a game-changer.
Vladimir VukovicCEO, Mevalon ProdukteHeliconia delivered an impeccable Odoo Enterprise implementation with seamless integration. Their expertise has revolutionized our operations.
Kartson KrayChairman, TIMmunity GmbHQuestions
It depends on the version gap, the number and state of custom modules, database size, integrations and the downtime tolerance. We price after the migration assessment, against a per-module compatibility review.
A standard database with no custom code is the cheap end. Dozens of custom modules across a multi-version gap is the expensive end.
From weeks for a small, standard system to several months where custom modules and integrations are extensive. The assessment produces a plan with a real duration for your system.
The production window itself is usually hours to a weekend, because it has been rehearsed in the test migration.
Yes: ours or another partner's. Each module is reviewed for compatibility with the target version and migrated, replaced by an OCA or standard feature, or retired with your agreement.
Yes. Enterprise-only features you rely on are replaced with Community or OCA equivalents or custom development, the database is migrated, and the system is re-tested before the licence is dropped.
Usually yes. Whether it should be is a business decision. Deep transactional history increases migration time and database size, so we agree what's migrated live and what's archived.
Only if they're tested and, where APIs changed, updated. Every integration is inventoried in the audit and re-tested in UAT on the target version.
With a full test migration of a production copy into staging, data validation old-to-new, and UAT by your process owners on real scenarios and every integration. Defects are fixed and the migration re-run until it's clean.
Downtime is limited to the rehearsed production window, typically hours to a weekend, because development, testing and validation all happen on staging beforehand.
Yes. Hypercare follows every go-live, and most migrations continue into an ongoing support engagement for the new version.
Next step
Send us your current version, edition, custom module count and integrations. We'll come back with a readiness rating and what would drive the work.