SaaS (Software as a Service)
SaaS (Software as a Service) is software you use over the internet on a subscription, while the vendor hosts, updates and secures it for you.
With SaaS you do not buy the software, you rent access to it. The vendor runs it on their own servers, looks after updates and security, and you log in through a browser or an app and pay a monthly or yearly fee.
What you are actually renting
Older software was bought once, installed on an office computer and kept for years. In the SaaS model the product, the servers and the upgrades all stay with the vendor. Zoho Books, Freshdesk and Google Workspace work this way. Your records live in their system, and your access lasts only while you keep paying.
The trade-off behind the low price
The appeal is speed and low entry cost, since a clinic can start using appointment software the same afternoon without hiring anyone. The costs show up later. Fees grow with every user, prices can change, new features arrive on the vendor's timetable instead of yours, and moving your data out can be harder than moving it in. Before subscribing, ask whether you can export everything in a usable format. Under the DPDP Act you also stay responsible for customer data even when a vendor stores it.
An example: the clinic that outgrew its subscription
Think of a three-chair dental clinic in Kochi that pays a monthly fee per dentist for an appointment tool. That is the right choice, because reminders and billing are standard needs. Years later the clinic has five branches, lab work to track and treatment plans that do not fit the tool, and the fees now climb with every new user. That is the point where a custom system starts to make sense.
SaaS as something you build
SaaS is also a business model: you build one product and sell subscriptions to many customers, usually on a multi-tenant design. At VS Tech Builders we build SaaS web applications for founders, with payments through Razorpay, Curlec or Stripe depending on where your customers are. Ownership, cost and exit are weighed in our comparison of SaaS subscriptions and one-time custom software.
Common questions
Is SaaS cheaper than custom software?
At the start, almost always, because a subscription avoids the build cost. Over three to five years the picture can reverse, since fees recur and rise with the number of users, while custom software is a one-time build plus maintenance. The fair comparison is the total spend over several years, set against how closely each option fits the way you actually work.
Who owns my data in a SaaS product?
You should, and the terms of service should say so. Before signing, check three things: whether you can export everything in a standard format such as CSV, what happens to your data if you stop paying or the vendor shuts down, and where the data is hosted. If a vendor is vague on any of these answers, treat it as a warning sign.
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