You need a website if
Visibility and credibility
Your need is to exist on Google, reassure people and get contacted. Nobody has to create an account. This is the format to pick until that changes.
Home
Comparison
Website, web app or SaaS: what’s the difference?
In short: a website presents information and generates enquiries. A web application performs actions for your users (management, accounts, data). A SaaS is a web application sold by subscription to many customers, each with their own isolated data.
All three open in a browser, but they answer different needs — and they don’t share a cost or a timeline. Here is how to place your project.
Updated
The table
The three formats, criterion by criterion
| Criterion | Website | Web application | SaaS |
|---|---|---|---|
| Main goal | Get found, build trust, generate enquiries | Run a business or an internal process | Sell software by subscription to many customers |
| What the visitor does | Reads, looks, contacts you | Logs in and acts: enters, manages, orders | Subscribes, then uses the tool daily |
| User accounts | Usually none | Yes, with roles and permissions | Yes, plus organizations or client workspaces |
| Data | Editorial content, little data | Real business data, to be secured | Multi-customer data, strictly isolated |
| Business model | Indirect: the site brings clients | Productivity gains or online sales | Recurring revenue (subscriptions) |
| Typical timeline | 2 to 4 weeks | 4 to 8 weeks for a usable first increment | MVP first, then iterations to the first paying customers |
| Technical complexity | Low: content, performance, SEO | Medium to high: business logic, security, real time | High: multi-tenant, recurring billing, scaling |
| What drives the cost | Design and content | Business logic and edge cases | Architecture, billing and governance |
| Concrete example | A firm’s or a restaurant’s site | An e-commerce back-office, a client portal, a light ERP | A booking tool sold to dozens of companies |
The verdict
How to place your project
You need a web app if
A business to run
Your users — customers or team — need to log in and act: order, manage, track, calculate. Spreadsheets and generic tools no longer cut it.
You need a SaaS if
Software to sell
The product isn’t just for you: several companies will pay a subscription to use it, each with their own data. That’s a web app plus multi-tenant architecture and recurring billing.
FAQ
Frequently asked questions
What is the difference between a website and a web application?
A website presents information; a web application performs actions (user accounts, management, calculations, data). It is software you reach from a browser, with nothing to install.
Is a SaaS always a web application?
Almost always, yes. SaaS adds two things to a web app: a multi-tenant architecture where each customer’s data is isolated, and a subscription model with recurring billing.
Can you start with a website and add an application later?
Yes, and it is common: the website captures demand, the application arrives once the business need is proven. Both can live on the same domain.
Which one costs the most?
SaaS, then the web app, then the website — because complexity, security and build time follow the same order. A focused MVP lets you start small on a SaaS.
How do I know whether my idea needs an MVP or a full product?
If the idea has no paying customers yet, an MVP focused on the core function is enough to validate the market. The full product comes after, funded by what the MVP proved.
Still unsure about the format?
Describe what your users need to be able to do. We reply with the format and a costed path.
Describe my need