B2B SaaS Tech Stack 2026
B2B SaaS has specific requirements: multi-tenancy, team management, SSO, audit logs, and enterprise integrations that consumer SaaS doesn't need.
B2B SaaS architecture differs from consumer SaaS in critical ways: multi-tenant data isolation, organization-level billing, team roles and permissions, SSO/SAML for enterprise customers, and compliance requirements (SOC 2, ISO 27001). Enterprise buyers have a checklist — and if your product doesn't support their IdP, doesn't export audit logs, or doesn't have data residency options, you lose deals. The stack below is designed for B2B products targeting mid-market and enterprise, not just self-serve prosumers.
The Stack
Frontend
Next.js with TypeScript for B2B dashboards — the app router handles complex, nested organization/workspace/project routing cleanly. shadcn/ui + Radix for accessible, professional components. Tanstack Table for complex data tables (critical in B2B). Charts with Recharts or Tremor. Role-based UI rendering with a clean permission hook.
Backend
NestJS is excellent for B2B — Guards for RBAC, Interceptors for audit logging, and Modules for domain separation. Implement multi-tenancy at the application layer using organization IDs in every query. Consider row-level security (RLS) in PostgreSQL as an additional defense layer. CASL.js for fine-grained authorization.
Database
PostgreSQL with proper multi-tenant schema design — either shared tables with org_id column (simpler) or schema-per-tenant (better isolation, harder to manage). Row-level security in PostgreSQL enforces tenant isolation at the database level. Redis for caching and session management. Prisma or Drizzle ORM for type-safe queries.
Infrastructure
Enterprise customers will ask where data is hosted and want data residency options. AWS and GCP have established compliance certifications (SOC 2, ISO 27001, HIPAA, GDPR). Start on Vercel + Railway for speed, plan your migration path. Enterprise contracts often require dedicated instances — your architecture should support tenant isolation.
Estimated Development Cost
Pros & Cons
✅ Advantages
- •NestJS Guards and Interceptors make RBAC and audit logging first-class concerns
- •PostgreSQL RLS enforces tenant isolation at the database level
- •TypeScript across the stack is essential for large B2B codebases with complex models
- •Next.js handles complex multi-level routing (org → workspace → project) cleanly
- •shadcn/ui + Radix provides accessible components without building from scratch
- •CASL.js handles complex permission logic (e.g., users can edit their own resources)
⚠️ Tradeoffs
- •Multi-tenancy architecture decisions are hard to change later — get it right early
- •SSO/SAML implementation (for enterprise) adds 2-4 weeks of development
- •SOC 2 Type 2 certification takes 6-12 months and requires organizational process changes
- •Enterprise integrations (Salesforce, HubSpot, Slack, JIRA) are each 1-2 weeks of work
- •Audit logging every user action adds overhead to every API endpoint
- •Enterprise procurement cycles are slow — design for self-serve first
Frequently Asked Questions
How do I implement multi-tenancy in my B2B SaaS?
Two main approaches: (1) Shared database with org_id column — simpler, lower cost, harder to enforce isolation. (2) Schema-per-tenant — better isolation, easier data export, higher complexity. Start with shared database + org_id in every table. Add PostgreSQL row-level security. Move to schema-per-tenant when enterprise customers demand it.
When do enterprise customers require SSO/SAML?
Almost all companies with >200 employees. Enterprise buyers expect to provision users via their IdP (Okta, Azure AD, Google Workspace) and require SSO. Use WorkOS or Auth0 to add SAML/SSO in days instead of weeks — don't build it yourself. WorkOS also handles SCIM provisioning (automatic user sync). Enterprise pricing typically includes SSO.
Do I need SOC 2 compliance for B2B SaaS?
Mid-market and enterprise buyers often require SOC 2 Type 2. Get started early — it takes 6-12 months to complete. Vanta or Drata automate ~60% of the evidence collection process. SOC 2 Type 1 is faster (3 months) and useful for early enterprise conversations. Budget $15,000-50,000+ for certification including tooling, audit, and legal.
What's the right billing setup for B2B SaaS?
Stripe + an abstraction layer. Self-serve: Stripe Billing with subscription plans. Enterprise: Stripe Invoicing for custom contracts, annual billing, and PO-based payment. Consider Lago (open source) or Orb for complex usage-based billing. Don't hardcode pricing into your frontend — use a product catalog that you can update without deployments.
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