B2B SaaS application development built to scale beyond MVP
We build B2B SaaS products with multi-tenant architecture, subscription billing, role-based access, analytics, and APIs designed before growth starts breaking things.
Free call. We'll map your architecture and flag the expensive mistakes early.
What is SaaS application development?
SaaS application development is the process of building subscription-based software that multiple customers use securely through the browser. Unlike a regular web app, a SaaS product requires tenant isolation, billing, authentication, user roles, admin tools, analytics, monitoring, and integrations from the start.
Each customer's data is separated at the database level to prevent cross-tenant access and reduce operational risk, even when tenants share the same infrastructure.
Plans, trials, upgrades, usage limits, failed payment recovery. Billing is not a feature you bolt on later. It shapes the data model and the product experience from day one.
Admins, members, viewers, custom roles. Who can see what, do what, and manage what. Retrofitting a permission system into a live product is one of the most painful rewrites in SaaS.
How users behave, how external systems connect, how your team manages accounts. These are built in from the start, not added as an afterthought before launch.
Is this the right fit?
- You have a SaaS idea and need an MVP that can grow into a v1 without a rewrite
- You have an internal tool you want to turn into a sellable SaaS product
- Your current SaaS is growing but billing, permissions, or architecture are becoming painful
- You are an agency looking for a white-label SaaS development partner with technical depth
- You need a team that can own architecture decisions, not just execute tickets
- You need a one-week prototype with no user data or billing
- You have no defined user problem yet and are still exploring what to build
- You need a no-code landing page or a simple brochure site
- Budget and speed matter more than architecture quality
Every layer of a modern SaaS product
From database schema to the dashboard your customers log into every day.
Multi-tenant architecture
Shared database with row-level security or separate schemas per tenant. We pick the isolation model that fits your compliance needs and expected scale.
- Row-level security or schema-per-tenant - chosen based on your data sensitivity requirements and tenant count projections
- Designed to support growth without forcing an architecture rewrite - isolation model chosen before the first customer so you never need to migrate mid-growth
- Isolation options that support GDPR and future compliance requirements - data never leaks between tenants by design, not just by convention
- Tenant provisioning automated - new customer signs up, their environment is ready without manual setup
Subscription billing
Stripe integration: products, prices, trials, proration, dunning, the billing portal. The edge cases get handled, not deferred to version two.
- Stripe or Paddle integrated fully - subscription creation, upgrades, downgrades, pauses, all handled
- Usage-based pricing if needed - metered billing, seat limits, feature gating tied to plan level
- Dunning and failed payment recovery - automatic retry logic, customer emails, churn prevention flows
- Customer billing portal included - self-serve plan changes, invoice download, card updates without contacting support
Auth and permissions
SSO, role-based access, team management, audit logs. Built on proven providers rather than custom crypto that will need replacing later.
- SSO via SAML and OAuth 2.0 - Google, Microsoft, Okta, and custom identity providers
- Role-based access with granular permissions - per-resource, per-action, not just admin/user
- Team management and invitations - member adds/removes, pending invites, role assignment by admins
- Full audit log of authentication events - who logged in, from where, what they changed, for compliance
Product analytics
Event tracking, funnel analysis, retention metrics. You understand what users actually do instead of what you hope they do.
- Event tracking from day one - every meaningful user action tracked before the first customer logs in
- Funnel and retention analysis - where users drop off, which features drive retention, which drive churn
- Amplitude, Mixpanel, or PostHog integration - or custom analytics if your data cannot leave your infrastructure
- Feature flags for controlled rollouts - release to 10% of users, measure impact, then roll out to everyone
Public API and webhooks
Lets your customers integrate. API keys, rate limiting, webhook delivery with retry logic, developer documentation that does not require a support ticket to use.
- REST or GraphQL API, documented from day one - OpenAPI spec generated automatically, Postman collection included
- API key management and rate limiting - per-key limits, usage dashboards, key rotation without downtime
- Webhook delivery with retry logic - failed deliveries retried with exponential backoff, delivery log available
- Developer documentation that actually works - code samples in multiple languages, sandbox environment, changelog
Admin and ops panel
Manage accounts, override plans, investigate issues, impersonate users safely. The internal tool your team will use every day from day one.
- Account management and plan overrides - support team can upgrade, downgrade, extend trials without touching the database
- User impersonation with full audit trail - debug customer issues as them, every session logged for accountability
- Usage metrics and health dashboard - MRR, churn, active users, error rates, all in one internal view
- Customisable for your support workflow - built around how your ops team actually works, not a generic admin panel
How we build SaaS products
- 01
Product and architecture mapping
We define the core user flow, tenant model, billing logic, permission structure, and integration needs. These decisions made upfront save months of rework and prevent the most common rebuild triggers.
- 02
SaaS foundation
Auth, tenant isolation, billing, admin tools, CI/CD, monitoring, and database design are built before feature work. Skipping this is why SaaS products end up needing rewrites.
- 03
Core feature loop
We build the smallest usable flow that can onboard real users, collect data, and prove the business logic. Scope adjusts as you learn, not as the original spec ages.
- 04
Beta with real users
Controlled rollout to selected users. We track activation and friction points, then adjust UX, performance, and product logic based on real behaviour rather than assumptions.
- 05
Launch and iteration
After launch we improve the product based on usage data, support issues, conversion signals, and whatever the business needs next.
Platform and SaaS work we can talk about
Most client work is under NDA. These are the types of platforms and products we have built.
B2B marketplace platform
Custom marketplace with supplier and buyer flows, multi-role permissions, order management, and long-term development support.
Booking platform
Custom booking flows, availability logic, tenant-specific configuration, and responsive implementation for a niche B2B vertical.
Internal tool to SaaS
Multi-tenant rewrite of an internal operations tool, adding subscription billing, role-based access, and a customer-facing interface.
All client names withheld under NDA. We are happy to discuss the technical approach on a call.
SaaS MVP or SaaS v1: what do you actually need?
A SaaS MVP helps you launch and test the core product. SaaS v1 is for products that need stronger roles, billing, admin tools, analytics, APIs, and integrations from the start.
| Area | SaaS MVP | SaaS v1 |
|---|---|---|
| Users | One core user type | Multiple roles and team structures |
| Billing | Basic subscription plan | Trials, proration, usage limits, dunning |
| Admin | Basic account control | Full ops panel with audit logs |
| Analytics | Core event tracking | Funnels, retention, feature adoption metrics |
| API | Internal only | Public API with webhooks and documentation |
| Integrations | 1–2 key integrations | CRM, data import/export, third-party connections |
| Starting budget | From €13,000 | From €45,000 |
Common questions
How is SaaS different from a regular web app?
Multi-tenancy, billing infrastructure, compliance requirements, and architecture designed for growth make it significantly more complex. Scoping for this from the start is cheaper than retrofitting it later.
Can we start smaller than a full SaaS MVP?
Yes. If you need to validate the concept first, we can start with a smaller prototype or technical proof of concept from €10,000. A SaaS MVP with billing, auth, admin basics, and analytics usually starts from €15,000.
Do you handle Stripe integration?
Yes. Products, prices, subscriptions, trials, proration, failed payment handling, dunning, and the customer billing portal.
What database do you use?
PostgreSQL as the default for most SaaS products. MySQL and MongoDB where there are existing technical reasons that make sense.
Can a mobile app be added later?
Yes. We design APIs to be consumed by mobile clients from the start, so adding one later is an extension rather than a rearchitecture.
What does a SaaS build cost?
A focused MVP with billing, auth, and core feature loop starts from €25,000–45,000. A full SaaS with API, admin panel, and analytics is typically €60,000–120,000 depending on scope.
How long does it take to build a SaaS MVP?
A focused SaaS MVP usually takes 10–16 weeks if the scope includes one core user flow, authentication, billing, admin basics, and analytics. A more complete v1 with API, advanced permissions, integrations, and reporting typically takes 16–24+ weeks depending on complexity.
Should we build multi-tenancy from day one?
Yes, if you plan to sell the same product to multiple companies or teams. Retrofitting multi-tenancy later is usually expensive because it affects the database model, permissions, billing, admin tools, and support workflows. Doing it upfront is significantly cheaper.
Can you take over an existing SaaS product?
Yes. We can audit the current architecture, identify risky areas, stabilize the product, and continue development without forcing a full rewrite unless the codebase truly blocks growth.
Can you add AI features to a SaaS product?
Yes. We can add AI-assisted workflows such as document processing, semantic search, recommendations, support automation, and data extraction. The important part is designing permissions, audit logs, and data boundaries before adding AI to production workflows.
What should be included in a SaaS MVP?
A practical SaaS MVP should include the core user flow, authentication, basic roles, billing or plan logic, admin access, analytics, error monitoring, and a way to collect user feedback. Fancy dashboards can wait. Billing, permissions, and data structure usually cannot.
Do you build SaaS for startups or established companies?
Both. For startups, we focus on MVP and product validation. For established companies, we work on rebuilding internal tools into SaaS products, modernizing legacy SaaS, or extending an existing product team with SaaS-experienced engineers.
Building a SaaS product?
Share the concept and target market. We will assess the architecture and send a scoped proposal.
Discuss your SaaS →