SaaS (software as a service) means using software over the internet on a subscription instead of installing and owning it. How it works, what it offers, and what to get right when you build your own SaaS product.
What does SaaS mean?
SaaS (software as a service) means using software over the internet, usually on a monthly or yearly subscription, instead of installing it on your computer and buying a licence. Most email, accounting, CRM and project management tools work this way today: you sign in from a browser or a mobile app, and servers, updates and backups are the provider’s responsibility.
How does it work?
A SaaS application runs centrally in the cloud and serves many customers at once. This is called a multi-tenant architecture: each customer sees only its own data, but the infrastructure is shared. When a new feature ships, every customer gets it at the same time — nobody has to install or update anything.
SaaS vs PaaS vs IaaS
Cloud services are usually thought of in three layers. IaaS (infrastructure as a service) is renting servers, storage and networking. PaaS (platform as a service) is a ready environment to run your application on. SaaS is finished software, ready to use. When you build your own SaaS product, you usually build it on top of IaaS and PaaS services.
Benefits
For the user: a low starting cost, access from anywhere and no maintenance burden. For the vendor: regular, predictable revenue, the simplicity of running a single version, and the ability to improve the product quickly by learning from usage data. That is why many startups and institutions eventually turn software they built for their own processes into a SaaS product.
Building your own SaaS product
The most critical decisions come first: how customer data is separated (tenant isolation), the subscription and billing model, role-based access and the admin panel. Billing or isolation bolted on later is always expensive. If you process personal data, privacy compliance (KVKK, GDPR) must be part of the architecture too.
When SaaS, when custom software?
If your need is a standard business process (accounting, email), an off-the-shelf SaaS is usually the fastest and cheapest option. If your process is what sets you apart, or you have a product idea you could sell to many customers, building a custom SaaS is worth more in the long run.
How WaveArc works
From idea to the release that takes its first payment, we build SaaS platforms ready to scale, with a multi-tenant data architecture, subscriptions and billing, an admin panel and monitoring. You can find our approach and deliverables on our Custom SaaS service page.
