B2B SaaS Development Company
Your MVP proved the idea. Now build the real product.
Multi-tenant architecture, billing, SSO, and GDPR compliance. Handled before you onboard customer number 100. A SaaS development company that ships, not a slide deck.
Book a free SaaS callIs this you?
You've got paying customers. But the codebase that got you here won't get you there.
Tenancy is an afterthought
Customer data lives in the same tables with a tenant_id column you added in month two. One bad query and you're leaking data between accounts. You know it's a liability. Fixing it means rewriting half the app.
Enterprise deals stalling
A prospect asked for SSO, audit logs, and a SOC 2 report. You said 'coming soon' and lost the deal. That's happening more often now.
Billing is duct tape
SaaS companies lose 4-10% of revenue to billing errors every year. You're tracking usage in spreadsheets, handling plan changes by hand, and praying invoices match reality.
Noisy neighbors, real complaints
One customer runs a heavy import and everyone else gets slow queries. Your monitoring can't tell you which tenant is the problem. You're firefighting instead of shipping.
Deliverables
What you get
A production-grade SaaS platform. Not a prototype with a login screen.
Tenancy architecture
Shared database with row-level security, schema-per-tenant, or full isolation. We pick the model that matches your compliance requirements and scaling path. Not the one that's easiest to build.
Auth and access control
SSO via SAML and OIDC. Role-based permissions. Team invites, seat management, and API keys. The stuff enterprise buyers won't close without.
Billing infrastructure
Stripe integration with real usage metering, not estimates. Plan upgrades, downgrades, trials, and prorations handled automatically. 42% of SaaS companies report revenue leakage. Yours won't.
Admin and ops dashboard
Tenant health at a glance. Usage patterns, billing status, feature flags, support context. Your ops team stops guessing and starts acting.
API layer
Versioned REST or GraphQL APIs with proper rate limiting and tenant-scoped authentication. Webhook support for the integrations your customers will ask for.
Observability per tenant
Metrics, logs, and traces segmented by tenant. Spot the noisy neighbor before your support inbox does. Alerting that tells you which customer is affected, not just which server.
Process
How we build it
Four phases. You see working software before the first month ends.
1
1-2 weeks Discovery
We map your customer tiers, compliance requirements, and growth targets. You get a tenancy model recommendation with trade-offs explained in plain language.
2
2-3 weeks Architecture
Database schema, API contracts, auth flows, billing integration plan. Every decision documented with the 'why,' not just the 'what.'
3
8-16 weeks Build
Core platform first: tenancy, auth, billing. Then your product features on top. Weekly demos you can click through. Automated tests on every commit.
4
2-4 weeks Launch and harden
Load testing, security audit, performance tuning. We don't hand you a staging build and call it production. You launch with confidence.
What to expect
Timeline
12-20 weeks
Kickoff to production-ready. The range depends on feature scope, not our speed. One Berlin B2B platform went 50 to 5,000 users with no re-architecture.
Investment
€80K-300K
For a platform that handles tenancy, billing, auth, and compliance. Scoped precisely after discovery. No surprises.
Your involvement
4-8 hrs/week
Product decisions and weekly demos. You stay in the loop without it becoming your full-time job.
Technology
The stack behind your SaaS
Battle-tested frameworks for multi-tenant platforms. Your team can hire for these anywhere. No exotic stack that leaves you dependent on us.
Ruby on Rails
Laravel
Django
React
Next.js
NestJS
PostgreSQL
Stripe
Common questions
What does a SaaS development company actually do?
A SaaS development company builds the parts of a subscription platform that don't show up in a demo but decide whether it survives growth: multi-tenant architecture, billing, authentication, and data isolation. We design and build all of it, then your product features on top. We're an engineering team, not a no-code shop or a staffing agency. If you want the full picture first, our complete guide walks through every layer: multi-tenant SaaS platform guide
Can you retrofit our existing application?
Yes. We assess your current architecture, identify the riskiest gaps (usually data isolation and auth), and build a migration plan that keeps your customers online. No big-bang rewrites. Most of our work is taking a proven MVP and turning it into a platform that holds up past 500 tenants.
Which multi-tenancy model should we use?
It depends on your customer requirements. A B2B tool serving 50-person teams has different isolation needs than a platform handling medical data. Shared database with PostgreSQL row-level security is cheapest to run; schema-per-tenant or database-per-tenant buys stronger isolation at higher ops cost. We recommend during discovery with clear trade-offs on cost, complexity, and compliance. We compared the patterns in detail here: multi-tenancy patterns compared
How much does it cost to build a SaaS platform?
A production-grade multi-tenant platform with billing, auth, and compliance runs €80K-300K, scoped precisely after a discovery phase. The range tracks feature scope, not hourly guesswork. Fixed-scope contract, so the invoice matches the estimate. If you're still pricing the product itself, we wrote up SaaS pricing models here: how to price a SaaS product
How do you handle GDPR and EU data residency?
EU data residency adds 15-25% to infrastructure costs if you retrofit it. We design for it from the start: encryption at rest, audit trails, data processing agreements, and tenant-scoped data access, hosted in the EU (Hetzner, IONOS, OVH, or AWS Frankfurt with an AVV). We're Berlin-based and work with SaaS companies across the DACH region and EU, in German or English.
What billing models do you support?
Per-seat, usage-based, tiered, hybrid. We integrate with Stripe and build the metering infrastructure so your invoices match actual usage, not estimates. Upgrades, downgrades, trials, and prorations are handled automatically. The architecture we use is written up here: Stripe subscription billing architecture
What technologies do you use for SaaS platforms?
Rails, Laravel, Django, or NestJS on the backend. React or Next.js on the frontend. PostgreSQL for the database (its row-level security is ideal for tenant isolation). Stripe for billing. We pick based on your team's existing skills and your hiring plans. No exotic frameworks that leave you dependent on us.
How are you different from the agencies on the 'top SaaS developers' lists?
Those lists are mostly directories and offshore shops competing on day rate. We're a small Berlin engineering team that has built multi-tenant platforms, billing systems, and tenant isolation enough times to write the reference guides other people cite. Fixed scope, weekly demos, full code ownership, and you can hire for our stack anywhere. We'd rather lose a deal than overpromise on a SOC 2 timeline.
Ready to build the real version?
Tell us where you're at today: MVP, early customers, or scaling pain. We'll tell you what the next 90 days should look like.