Azetria

Products & applications

SaaS platform development

From a validated prototype to a product you can sell

In short
Building a SaaS means creating a software product sold by subscription to multiple clients on shared infrastructure. The structural decisions are per- client data isolation, recurring billing, the public API and observability. Expect €4,500 to €12,000 excl. VAT for a first commercialisable version.
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From 4 500 € excl. VAT · from 2 to 3 weeks

The minimum scope is a commercial decision

A SaaS first version should not be «the product, but smaller». It should be the smallest thing a client agrees to pay for. Those two definitions produce very different scopes, and only the second one funds what comes next.

Data isolation is the critical decision

It is the most structural architecture choice and the hardest to change afterwards. A data leak between clients is an incident a young software company rarely recovers from commercially.

We apply three rules. Tenant filtering is applied globally at the model level, never left to each individual query. A dedicated test suite verifies that one client cannot reach another’s data, including through the API and exports. And any hand-written query goes through a specific review.

Billing: plan for the ugly cases

Failed payments, mid-month tier changes, partial refunds, a trial expiring on a Sunday. These cases represent 10 % of billing code and 80 % of support tickets when handled poorly. We cover them with automated tests before go-live.

What you receive

  • Multi-tenant architecture with verified isolation
  • Automatic sign-up and provisioning
  • Subscriptions, trials, tiers and billing
  • Documented and versioned REST API
  • Administration dashboard
  • Monitoring, alerting and logging

Technologies used

  • Laravel 12
  • PostgreSQL
  • Stripe
  • Redis
  • Horizon
  • Meilisearch

Frequent questions about this service

A shared database with tenant-scoped isolation works well up to several hundred clients and costs far less to operate. Schema or database isolation becomes relevant with a regulatory requirement, very uneven volumes, or a need for per-client restores. Decide this during discovery: changing it later costs weeks.

Between €150 and €600 per month for the first few hundred clients: application server, managed database, cache, storage and monitoring. That cost grows far more slowly than revenue when the architecture is sound.

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