COMPARISON · ODOO VS SELLSY
Odoo or Sellsy: how to choose?
Sellsy is a French commercial platform covering the sales cycle, invoicing and subscription management with a polished interface. When a sale triggers a delivery, a purchase, a production run or a project, Odoo covers everything in a single database with no re-keying.
Our business is implementing Odoo, so we have a stake in this comparison. This page also says what Sellsy does well and when it is enough. We believe that choosing the wrong tool costs more than getting honest advice.
Odoo or Sellsy: the straight answer
A commercial or service-based SME focused on the sales cycle and invoicing: Sellsy may be enough. When a sale triggers a delivery, a purchase, a production run or a project, Odoo is the right choice. The two tools do not play in the same functional league.
Sellsy is aimed at sales teams who want to manage their pipeline, send quotes, invoice and track payments without worrying about anything else. It is a clear and coherent product decision.
Odoo starts from the same sales point and extends the flow all the way through purchasing, stock, manufacturing, field service, eCommerce and full accounting, all in a single database. No integration to maintain between a separate CRM and a separate ERP.
What Sellsy does well
Sellsy has built a solid reputation on the commercial front for French SMEs. Here is what it genuinely excels at.
CRM and visual pipeline
Opportunity tracking, automated follow-ups and sales activity dashboards: Sellsy gives sales teams a clear and actionable view of their portfolio.
Fast quotes and invoicing
From the commercial proposal to the invoice, the flow is smooth. Recurring subscription management and payment tracking are particularly well developed for a service-based SME.
Polished interface, quick to learn
Sellsy's interface is designed for non-technical users. Sales teams adopt it quickly with no lengthy training.
French product, local compliance
Sellsy is published in France, complies with French invoicing rules and offers an interface and support in French.
Payment reminders and collections
Client reminders, payment tracking and late-payment management are built into the commercial cycle without juggling between multiple tools.
Suited to micro-businesses and small service SMEs
For an organisation whose core activity is selling and invoicing services, Sellsy offers a relevant balance between accessibility and functionality.
Where Odoo goes much further
Sellsy covers the commercial front and invoicing. Odoo covers that same scope and adds, within a single database, all the operations that are triggered after a sale.
From quote to delivery with no re-keying
When an order is confirmed in Odoo, it automatically generates delivery orders, purchase orders if stock is insufficient and manufacturing orders if the product is made to order. No exports, no integrations to maintain.
Every business function in the same database
- Purchasing: requests for quotation, supplier orders, goods receipt and stock valuation.
- Stock and inventory: multi-warehouse management, replenishment rules, lot and serial number traceability.
- Manufacturing: production orders, bills of materials and routing operations.
- Projects and field service: scheduling, timesheets and service reports.
- eCommerce: online shop connected to the same stock and CRM.
- Point of sale: till synchronised with the accounting in real time.
- Full accounting and payroll interface: general ledger, bank reconciliation, VAT returns and payroll interface.
A single source of truth
With Sellsy, a growing SME often ends up adding an ERP alongside it, then a stock management tool, then a project tool. Every interface is a friction point and a risk of error. Odoo avoids this fragmentation from the outset.
Feature comparison table
| Criterion | Sellsy | Odoo |
|---|---|---|
| Positioning | Commercial and invoicing platform for SMEs | General-purpose ERP covering all business functions |
| Functional scope | CRM, quotes, invoicing, subscriptions, reminders, payment collection | CRM, sales, purchasing, stock, manufacturing, projects, field service, eCommerce, point of sale, accounting, HR and payroll interface |
| Flexibility and customisation | Configuration within the limits of the SaaS platform | Activatable modules, specific developments without touching the core, open APIs |
| Accounting | Invoicing and payment tracking; limited full accounting | Full accounting: general ledger, bank reconciliation, VAT, period closings and multi-currency |
| Interface and usability | Polished interface, quick to learn for sales staff | Modern interface, regularly improved and suited to a variety of business profiles |
| Hosting and code | Closed SaaS, hosted by the publisher | SaaS (Odoo Online), managed cloud (Odoo.sh) or dedicated server; open source code (Community LGPL, Enterprise OPL) |
| Target company size | Micro-businesses and SMEs, primarily in services | SMEs to mid-market companies, all sectors including manufacturing, trading and distribution |
| Electronic invoicing | Approved platform status to be verified with the publisher | PDP status to be verified with the publisher for the current version |
Flexibility that Sellsy cannot offer
Sellsy is a closed SaaS platform. You use what the publisher has built, within the limits they have set. That is a valid choice when your needs are stable and standard.
Odoo works differently. Each module is independent and can be activated on demand. A specific development is added without touching the product core: it survives version upgrades and remains the client's property.
- Granular configuration: workflow rules, custom fields and tailored views without any development.
- Bespoke modules: specific business logic can be encapsulated in a clean, versioned and documented module.
- Open APIs: connect to a logistics platform, an electronic signature tool, a proprietary till system or any third-party service.
- Controlled version upgrades: specific developments are designed not to block upgrades to Odoo 20 or later versions.
- Choice of hosting: SaaS, managed cloud with staging environments (Odoo.sh) or a dedicated server for data sovereignty requirements.
This flexibility is particularly valuable for SMEs whose business model differs slightly from the standard: complex pricing, multi-step approval workflows or integration with an existing specialist application.
The technical foundation that sets Odoo apart from Sellsy
Odoo is built on PostgreSQL, a free and highly performant database and on Python, the dominant language of artificial intelligence. This technical choice is significant: it places Odoo within an ecosystem of tools, skills and innovations that closed SaaS platforms cannot easily access.
Odoo 20 integrates AI in a particularly advanced way: 52 ai* modules in the Enterprise edition (compared with 15 in Odoo 19). This covers autonomous agents for sales, purchasing, stock, projects, helpdesk and scheduling, AI-computed fields (ai_fields), an AI action server and a connection to the MCP protocol (ai_mcp).
For an SME, this translates into practical benefits: follow-up suggestions, stock forecasts, AI-assisted drafting of sales emails and anomaly detection in orders. These features are activated within the same environment as the CRM, invoicing and accounting.
When to choose Sellsy and when to choose Odoo
Choose Sellsy if…
Your activity is focused on selling and invoicing services. You have no stock, no manufacturing and no field service. Your sales teams want a tool that is quick to learn. Your accounting is handled by an external accountant who works from your invoices.
Choose Odoo if…
A sale triggers a delivery, a purchase, a production run or a project. You want a single database for all your data with no re-keying between a CRM and an ERP. Your business is growing and you anticipate new operational needs. You want fully integrated accounting or a till synchronised with your books.
Still unsure? A situation audit will give you clarity.
A situation audit is a structured review of your actual processes and workflows. In half a day, we identify what your current tool covers well, what it misses and whether Odoo would bring real value in your specific case.
This audit is free of charge and independent of Odoo: if Sellsy is the right choice for you, we will tell you so.
ANOR in numbers
63
years of combined Odoo experience across the partners
16
Odoo versions mastered, from version 5 to 20
5
certified Odoo consultants
2 months
fastest migration completed with no business interruption
Frequently asked questions: Odoo or Sellsy
Odoo's CRM covers the opportunity pipeline, sales activities, follow-ups and sales forecasting. Its key advantage over Sellsy is its direct connection to the rest of the ERP: a won opportunity generates a sales order, a delivery order or a manufacturing order with no re-keying. If your only need is a CRM and invoicing, Sellsy is very well designed for that. If the CRM is part of a broader workflow, Odoo is more coherent.
Yes. Migrating data from Sellsy is feasible: clients, contacts, quotes, invoices and sales history can all be imported into Odoo. The level of fidelity depends on the quality and structure of the data exported from Sellsy. We manage this migration in a methodical way. For more details, see our guide on data migration.
Yes. Odoo has a subscriptions module that manages recurring contracts, renewals, reminders and automatic invoicing. It is connected to the CRM, accounting and the client portal. SMEs offering SaaS products, maintenance contracts or recurring services use it regularly.
The French electronic invoicing reform distinguishes between partner dematerialisation platforms (PDPs) and other solutions. We recommend checking the current status of each tool directly with its publisher, as the list is evolving. For Odoo, check the dedicated news section on our website.
Odoo offers the Custom plan at €35.90 per user per month in the first year, then €44.90 from the second year onwards. This plan includes all applications, multi-company support and external APIs. For Sellsy pricing, contact the publisher directly. To understand the full cost structure of an Odoo project, our dedicated guide will give you a clear picture.
Let's talk about your specific situation
Thirty minutes is enough to find out whether Odoo delivers real value compared to Sellsy in your particular case.