B2B SaaS Application Development
We build B2B SaaS platforms from validation-stage MVPs to enterprise multi-tenant systems with compliance, scale, and guaranteed SLA. Approximately 40% of our projects are SaaS in various verticals — ProductOps, EdTech, FinTech, MarTech, HRTech.
SaaS project types
- Vertical B2B SaaS: industry-dedicated platforms (legal tech, real estate tech, restaurant tech) with domain-specific features.
- Tools for product/marketing teams: dashboard analytics, A/B testing platforms, customer feedback tools, marketing automation.
- Multi-tenant SaaS with white-label: architecture allowing per-client branding, custom domains, theming.
- Internal tools as SaaS: apps replacing manual processes (custom CRM, ticketing, document management) — sold as product.
- API-as-a-Service: backend services consumed by other apps (data enrichment, ML inference, integrations).
- Marketplace platforms: two-sided platforms with transactional flow, commissions, dispute resolution.
SaaS architecture — multi-tenancy done right
The most important architectural decision in SaaS is the multi-tenancy model. Wrong choice = rewrite at first enterprise client requesting isolation. We work with three models:
- Shared database, shared schema (row-level tenancy): most efficient for scale, complex for data isolation. For under 1000 tenants with similar needs.
- Shared database, separate schemas: good compromise. For SaaS with moderate regulatory needs.
- Database-per-tenant: maximum isolation, higher operational cost. For enterprise clients with strict data residency.
B2B SaaS stack
- Frontend: Next.js with TypeScript for SEO + landing pages, plus SPA app shell for dashboard. Tailwind + shadcn/ui design system.
- Backend: Modular NestJS for API, or Laravel for projects with multiple integrations. tRPC for end-to-end type safety.
- Database: PostgreSQL with Prisma or Drizzle ORM. Redis for cache + sessions.
- Auth: Clerk or Auth0 for B2C SaaS, custom JWT with refresh tokens for B2B with SSO. SAML/OIDC for enterprise clients.
- Billing: Stripe Billing for subscriptions, metered usage, dunning. Paddle for automatic EU sales tax handling.
Typical SaaS pricing
- SaaS MVP (market validation): €10,000 – €25,000, 2-4 months
- Mid-tier B2B SaaS (post product-market fit): €30,000 – €80,000, 4-8 months
- Enterprise SaaS (multi-tenant, compliance): €80,000 – €250,000+, 8-14 months
- Migration from legacy stack to modern: €20,000 – €100,000, 4-10 months