Turn Your Working System Into a Multi-Tenant SaaS Product You Can Sell by Subscription

Usually a large part of it carries forward. The screens, business rules and reports your users already trust are the valuable part and they are normally kept. What almost always needs rework is the foundation underneath: adding an account boundary to every record and file, replacing anything that assumes a single company, removing conditions written for individual clients, and adding plans, signup and billing. Where the existing code is very old or was written without a clear data model, rebuilding parts of it is cheaper than defending it. We tell you which parts fall into which bucket in the productisation review, before you commit to a build.

Multi-tenancy means one running system serving many customers, with each customer’s data separated inside it. Separate copies work while you have two or three customers and someone patient to maintain them. The cost appears later: every fix is repeated per copy, the copies drift apart, you cannot release anything quickly, onboarding a customer needs a server set up, and your running cost grows in a straight line with your customer count. If you intend to sell to many customers at a subscription price, tenancy pays for itself. If you will only ever have a handful of large accounts on negotiated contracts, separate instances can be a legitimate choice and we will say so.

The product layer around your application. That means the tenancy and isolation model, self-service signup and workspace provisioning, plan and feature limit management, trials, upgrades and downgrades, recurring billing with invoices and dunning, customer onboarding and data import, per-account branding and custom domains, an operator console for your team, audited support access, usage and account health reporting, per-account export and deletion, and migration of customers already running on separate copies. Design, testing, deployment, documentation and training are part of the delivery, not extras.

Scope, not a rate card. The main factors are the state of the existing system and how much of it can be reused, the isolation model your data volumes and customers demand, how complicated the pricing is — a single flat plan is far less work than metered usage with proration and offers — how much of onboarding must be self-service, whether customers need their own branding and domains, the depth of the operator console, and how many existing installations have to be migrated. We give an itemised proposal against the signed tenancy and plan document, so you approve a defined deliverable rather than an estimate.

How much has to change underneath, and how quickly decisions come from your side. The biggest factors are whether the tenant boundary can be added to the existing data model or the model needs reworking, how many pricing and lifecycle rules you want at launch, gateway approvals and mandate activation which sit with the payment provider rather than with us, the number and condition of existing customer installations to migrate, and how fast plan and pricing questions get answered. Launching with one plan and a simple trial, then adding tiers and offers once real customers are on board, gets you selling considerably earlier.

Recurring collection is set up through your own payment gateway account using subscription plans, card mandates or UPI AutoPay, so charges run on the due date without anyone raising a request. The product generates a subscription invoice for each charge in the format your accountant specifies, keeps receipts and payment history against the account, and can post the entries to Tally or Zoho Books. Tax treatment, invoice numbering series and place-of-supply rules are set by your CA and we implement exactly what they specify. Failed charges follow the retry and reminder schedule you define before access is restricted.

Isolation is enforced where the data is read, not left to each screen. Every record, uploaded file, report, export, background job and API call is scoped to its account, so a query without an account context does not return anything. Access inside an account is further controlled by role. Before launch we test this deliberately: we attempt to reach one account’s records while logged in as another, through the interface, direct URLs, exports and the API, and fix anything that responds. Support staff reach a customer account only through time-limited impersonation that is logged with a name and timestamp.

Yes. Logo, colours, invoice and report templates, email sender name and notification content can all be set per account. Where a customer wants the product under their own name, we map their domain to their workspace and handle the certificate automatically, which is how a white-label arrangement for dealers, franchisees or partner firms is normally set up. Whether every plan gets branding or only the higher tiers is a pricing decision you control from the console.

You set the rules and the product follows them. A failed charge is retried on a schedule, the account owner receives reminders, and after a grace period you define the account moves to read-only and then to suspended, with reactivation the moment payment succeeds. Nothing is deleted at that point. If a customer chooses to leave, they can export their own data in a usable format, and the account is archived and then removed on the retention schedule you have published to them. Being able to answer this question clearly is often what convinces a cautious buyer to sign up.

You do, completely. On handover you receive the full source code repository, database design, deployment runbook and intellectual property ownership. Hosting, payment gateway, domain and communication accounts are created in your own name from the beginning, so subscription revenue reaches your bank account directly and customer data sits in infrastructure you control. There is no licence fee to us, no revenue share, and nothing in the setup that makes it difficult to continue with another team.

Yes, and for a product it works in two directions. Outward, we connect the platform to your payment gateway, accounting software, WhatsApp Business, email and SMS providers and analytics. Inward, we build the documented API and webhooks your customers ask about — so a customer can push their masters in, pull their transactions out, or let their own vendor build against it — scoped to their account and gated by their plan. If your customers commonly run Tally or a particular billing package, that connector often becomes a paid feature of a higher tier.

We train the people who will actually run the product: the person handling accounts and renewals, the person answering support, and whoever approves offers and refunds, each on the screens they use, with a written operations manual. After go-live a warranty period covers defects, and an optional support agreement covers monitoring, gateway and app-store changes, releases and new features as account numbers grow. From you we need a decision-maker who can settle plan and pricing questions without a long internal loop, access to the existing system and to any customer installations being migrated, your payment gateway account activated in your own name, and a couple of real customers willing to be the first accounts on the platform. Projects here slow down on pricing decisions more than on anything technical.