The Short Answer
If you are asking what is Odoo software, the shortest honest answer is this: Odoo is open-source business management software, a single suite of integrated apps for accounting, CRM, sales, inventory, manufacturing, HR, and e-commerce that all share one database. When people say Odoo ERP, they mean the same product used as an enterprise resource planning system, where a confirmed sales order updates stock levels, triggers a purchase, and posts to the general ledger without anyone re-keying the data by hand.
Odoo is developed by Odoo SA, a company headquartered in Belgium, and it ships in two forms: a free, self-hosted Community edition and a paid Enterprise edition with additional apps and official support. It runs in the browser, is written in Python with a PostgreSQL database, and can be hosted on Odoo's own cloud, on a public cloud you control, or on your own servers.
The rest of this guide answers the questions buyers actually ask before committing: is Odoo really an ERP, what apps come in the box, how the editions differ, what it costs, who it fits and who it does not, how it compares to the alternatives, and how a real implementation unfolds. If you want the naming backstory (Odoo was called OpenERP until 2014), skip to the heritage section near the end.
Odoo as an ERP: What That Actually Means
ERP stands for enterprise resource planning. Stripped of the jargon, an ERP is one system that runs the operational and financial core of a business, orders, invoices, stock, purchasing, production, and cash, on a shared data model so that every department reads and writes the same numbers. The opposite of an ERP is a stack of disconnected tools: a spreadsheet for inventory, a separate invoicing app, a standalone CRM, and a bookkeeper re-typing everything into accounting software at month end.
Odoo qualifies as an ERP because its apps are not separate products bolted together, they are modules on a common framework with one database. Install Sales and Inventory and Accounting, and they already know about each other: the product you sell is the product you stock and the product you cost. That single-database design is the whole point of an ERP, and it is why an Odoo ERP system can replace five or six point tools at once.
Odoo is broader than a classic ERP, though. Alongside the operational core it includes a website builder, e-commerce storefront, point of sale, marketing automation, helpdesk, and project management. That is why Odoo SA describes it as business management software rather than strictly ERP software, even though odoo erp is how most people search for it and how it is most often deployed.
The Odoo Module Suite
Odoo is sold and installed as apps, and you turn on only the ones you need. The main modules, grouped the way most businesses adopt them:
- Finance: Accounting, Invoicing, Expenses, and Spreadsheet. Double-entry accounting, bank reconciliation, tax handling, and financial reports live here. This is the backbone of any Odoo ERP deployment.
- Sales and CRM: CRM for the pipeline, Sales for quotations and orders, Subscriptions for recurring revenue, and Point of Sale for retail and restaurants. Odoo is widely used as a CRM on its own, but it is a CRM inside an ERP, not a standalone product.
- Supply chain: Inventory, Purchase, and Manufacturing (MRP). Multi-warehouse stock, reordering rules, vendor management, and bills of materials. For production businesses this is often the reason to move to Odoo, see our manufacturing ERP overview.
- Human resources: Employees, Recruitment, Time Off, Appraisals, Payroll (region dependent), and Attendance.
- Websites and e-commerce: a drag-and-drop Website builder, an e-commerce storefront tied directly to Inventory and Accounting, plus a Blog and Forum.
- Services and productivity: Project, Timesheets, Field Service, Helpdesk, Documents, Sign, and the Discuss messaging tool.
- Marketing: Email Marketing, Marketing Automation, Events, SMS, and Social Marketing.
There are well over thirty official apps and thousands of community modules on top. The practical takeaway is that you rarely need everything on day one. Most implementations start with a tight core (often Sales, Inventory, and Accounting) and add modules as processes mature.
Community vs Enterprise
Odoo comes in two editions from the same code base. Community is open source under the LGPL, free to download and self-host, and includes the core apps: CRM, Sales, Invoicing, Inventory, Purchase, Manufacturing basics, Project, and the website. Enterprise is the paid, licensed edition that adds full double-entry Accounting, Studio (the low-code customization tool), advanced Manufacturing and Quality, mobile apps, and official support and upgrades.
The short rule: Community is genuinely usable for a lean operation that can self-host and live within the core apps, while Enterprise is what most growing businesses end up on because they need full accounting, supported upgrades, and Studio. We walk through the differences app by app, including where Studio fits, in our Community vs Enterprise vs Studio comparison.
How Much Odoo Costs
There are two costs to separate, and confusing them is the single biggest budgeting mistake buyers make. The first is the software license: Community is free, and Enterprise is a per-user subscription that Odoo SA sets, with hosting on Odoo's own platform available as part of the pricing. The second is implementation: the configuration, data migration, training, and any custom development required to make the software fit your business. For most SMBs, implementation is the larger line item in year one, not the license.
Because Odoo's list prices change and because your real cost depends on user count, edition, and scope, we keep qualitative here and point you to live numbers: see our pricing page for how we structure Odoo implementation fees, and Odoo SA's own site for current per-user license rates. The honest guidance is that a focused first phase on a handful of apps is affordable for a small business, and the cost scales with the number of users, the number of apps, and how much you customize. For a deeper buyer's walkthrough of modules, costs, and fit, see our complete Odoo ERP 2026 guide.
Who Odoo Is For, and Who It Is Not
Odoo fits best when a business has outgrown disconnected tools and wants one system across departments without the price tag or rigidity of the large enterprise suites. It is a strong fit for:
- Growing SMBs and mid-market companies that are stitching together QuickBooks, spreadsheets, and a separate CRM and want them to talk to each other.
- Manufacturers, distributors, and retailers that need inventory, purchasing, and production tied to accounting in real time.
- Businesses that want to own their system, whether through the open-source edition, self-hosting, or the freedom to customize deeply.
- Companies going global, because Odoo handles multi-company, multi-currency, and multi-language out of the box.
- IT and technology firms, MSPs, and software companies that run on project billing, subscriptions, and utilization, see our ERP for IT companies breakdown.
Odoo is a weaker fit when a business needs a single deep best-of-breed tool rather than a broad suite (a highly specialized CRM or a niche vertical accounting package may simply do that one job better), when there is no appetite for an implementation project and the team wants software that works untouched on day one, or when heavy regulatory and audit requirements demand a specific certified platform. Being honest about that is the whole point of our Odoo alternatives guide, written by a firm that implements Odoo for a living.
Odoo vs the Alternatives
The ERP market splits roughly into three tiers, and Odoo competes across the first two. Against entry tools like QuickBooks and Zoho, Odoo wins on breadth: it is a full ERP, not accounting plus add-ons. Against the enterprise incumbents like NetSuite, Sage Intacct, and Acumatica, Odoo competes on price, flexibility, and open source, while those platforms compete on maturity in specific verticals and on their partner ecosystems.
Rather than argue it in the abstract, we maintain head-to-head breakdowns on our ERP comparison hub, covering Odoo against NetSuite, Sage Intacct, Acumatica, QuickBooks, and more. If you are weighing hosting models specifically, our cloud ERP overview lays out the deployment options.
How Odoo Gets Implemented
Downloading Odoo takes minutes; making it run your business is a project. A typical implementation moves through discovery (mapping your current processes and deciding which to keep, change, or drop), configuration (setting up the chart of accounts, products, workflows, and users), data migration (bringing customers, vendors, products, and open balances across cleanly), training, and a go-live cutover. The projects that fail are almost always the ones that skipped discovery and tried to copy the old system one-for-one.
Most businesses do this with an Odoo partner rather than in-house, because a partner has seen the same problems across dozens of deployments. That is our core work: see our Odoo implementation services for how we run a project, and ERP consulting if you are still deciding whether Odoo is the right platform. As an Odoo partner serving the US and Canada, we can also just show you the software: book a live demo and see your own use case running.
The OpenERP Heritage
If you have run into the name OpenERP, that is Odoo's former name, not a different product. The software began in 2005 as TinyERP, founded by Belgian engineer Fabien Pinckaers, was renamed OpenERP in 2009, and was rebranded to Odoo in May 2014 once the platform had grown well beyond ERP into websites, e-commerce, and point of sale. The code base is continuous: OpenERP 7 became Odoo 8 directly, and today's Odoo 19 is a recognizable descendant. Anything you read online about OpenERP is about the software now called Odoo, we cover the full backstory and the legacy migration path in our guide on what OpenERP is and the shift to Odoo.
Frequently Asked Questions
The questions buyers ask us most often about what Odoo is.
What is Odoo used for?
Odoo is used to run the core operations and finances of a business from one system: accounting and invoicing, CRM and sales, inventory and purchasing, manufacturing, HR, e-commerce, and project management. Because all the apps share one database, a single transaction flows across departments without re-entry, which is why it is deployed as an ERP.
Is Odoo an ERP or a CRM?
Both, but primarily an ERP. Odoo includes a capable CRM app for managing leads and the sales pipeline, but that CRM is one module inside a full ERP suite that also covers accounting, inventory, manufacturing, and more. You can run just the CRM, but most businesses adopt Odoo precisely because it is more than a CRM.
Is Odoo free?
Partly. The Odoo Community edition is open source and free to download and self-host. The Enterprise edition, which adds full accounting, Studio, advanced apps, official support, and hosting, is a paid per-user subscription. Either way, budget separately for implementation, the configuration and data migration that make the software fit your business.
What is the difference between Odoo Community and Enterprise?
Community is the free, open-source edition with the core apps and no official support. Enterprise is the paid edition built from the same code base, adding full double-entry accounting, the Studio low-code tool, advanced manufacturing and quality features, mobile apps, and supported upgrades. Most growing businesses end up on Enterprise for the accounting and supported upgrades.