Web App Development
B2B Web App Development
Enterprise buyers won't sign a contract without SSO, audit logs, and role-based permissions. We build B2B-ready web apps with every enterprise checkbox pre-ticked — so your sales team can close without engineering delays.
Why B2B Apps Require a Different Architecture
A B2C app has users. A B2B app has organizations with members, each organization has its own data, its own billing plan, its own admin who manages permissions, and an IT department that will reject your app unless it supports SAML SSO. These requirements aren't add-ons you bolt on later — they're architectural decisions that touch the database schema, the authentication layer, the billing model, and the API design. Building B2B on top of a B2C foundation is a rewrite waiting to happen.
The B2B sales cycle creates a specific product requirement: enterprise prospects need to evaluate your product before they pay, but evaluation needs to be controlled enough that you can convert them. We build product-led growth patterns into the architecture — freemium tiers with usage limits enforced at the API layer, in-app upgrade prompts tied to real feature gates, and a self-serve checkout flow so a champion at the prospect company can start a paid trial without waiting for procurement.
Security is table stakes for enterprise B2B. That means row-level security so no organization can access another's data (enforced at the database layer, not the application layer), SOC 2-compatible audit logs of every data access and mutation, SAML 2.0 / OIDC SSO so IT can manage access through their identity provider, and documented data retention and deletion policies. We build all of this into the initial architecture — not as an afterthought before a security review.
Our Approach to B2b web app development
Every project follows our 4-step vibe-coding process — AI handles the boilerplate, senior engineers handle the craft. From idea to live product in 3–7 days for MVPs.
Multi-Tenant Schema Design
Every table has an organization_id foreign key. Row-level security policies in PostgreSQL ensure every query is automatically scoped to the authenticated user's organization — no application-layer filtering that can be bypassed.
SSO & Enterprise Auth
We implement email/password, Google OAuth, and SAML 2.0 / OIDC for enterprise SSO via Supabase Auth. Just-in-time provisioning creates user accounts on first SSO login without manual admin steps.
Usage-Based Billing & Feature Gates
Stripe Billing with usage-based meters for per-seat or consumption pricing. Feature flags checked at the API layer — not just in the UI — so plan limits are enforced even when users call your API directly.
Audit Logging & Compliance
An append-only audit_events table records actor, action, resource, and timestamp for every significant operation. Exportable as CSV or JSON for compliance reviews. Retention policies configurable per organization.
What You Get
Every b2b web app development engagement includes these deliverables — scoped before we start, delivered before we invoice.
- Multi-tenant PostgreSQL schema with RLS policies per organization
- Supabase Auth with SSO: Google OAuth and SAML 2.0 / OIDC
- Role-based access control: owner, admin, member, viewer
- Organization management UI: invite members, set roles, remove users
- Stripe Billing with per-seat and usage-based plan options
- Feature gates enforced at API layer with in-app upgrade prompts
- Audit log: full history of data access and mutations
- API key management for programmatic access
- Admin panel for your team to manage organizations and support
- GDPR-compliant data export and account deletion flows
Tech Stack We Use
Our B2B stack: Next.js 15 server components and server actions, React 19, TypeScript strict mode, Supabase (PostgreSQL with RLS, Auth with SAML provider, Edge Functions), Stripe Billing with metered usage, Resend for transactional email, Vercel for deployment, and Sentry for error monitoring. We follow OWASP Top 10 mitigations and can provide a security architecture document for enterprise security reviews.
Case Study
PLGOS — B2B Product-Led Growth Platform
PLGOS is a B2B SaaS tool for growth teams at mid-market companies. Their primary buyer is a Director of Growth who needs to demo the product to their CMO and then hand it off to a RevOps manager who'll configure it for the sales team. Each of those three people has a different role with different data access. The enterprise tier adds SSO and a dedicated workspace with isolated data. We built the entire multi-tenant architecture — org management, role definitions, SAML SSO for their first enterprise customer, and usage-based Stripe billing — in the initial launch scope. Their sales team closed three enterprise accounts in the first 30 days because the enterprise checklist was already done.
Read full case studyPricing Transparency
B2B web app development starts at $7,000 for an MVP with multi-tenant data isolation, role-based access, and Stripe billing. A full enterprise-ready build with SAML SSO, audit logging, API key management, and admin tooling runs $20,000. Enterprise requirements mean more architectural complexity upfront — fixed-price scoping ensures you know the full cost before we start.
MVP
From $5,000
3–7 business days
Full Build
From $15,000
2–4 weeks
All projects include full code ownership, two revision rounds, Vercel deployment, and one week of post-launch support. No hidden fees.
Frequently Asked Questions
What is the difference between multi-tenant and single-tenant architecture?
In a multi-tenant architecture, all customers share one database but row-level security ensures each customer sees only their data. In single-tenant, each customer has an isolated database. We build multi-tenant (more cost-efficient) with RLS policies that provide the same isolation guarantee.
How does SAML SSO work with Supabase?
Supabase Auth supports SAML 2.0 identity providers (Okta, Azure AD, Google Workspace, etc.). We configure a SAML provider per enterprise organization. When a user logs in, Supabase validates the SAML assertion and issues a JWT. The user's organization and role are embedded in the JWT claims.
How do feature gates work in practice?
Each organization has a plan tier stored in the database. Server-side feature flag checks compare the required plan tier against the organization's current tier before executing any gated feature. Attempts to access gated features return a 403 with an upgrade prompt payload — the UI shows the upgrade modal.
Can you build usage-based billing (pay per API call or per seat)?
Yes. Stripe Billing supports metered usage via usage records. We instrument your API routes to report usage events to Stripe, which aggregates them and charges at the end of the billing period. Per-seat billing is simpler — we update the Stripe subscription quantity when seats are added or removed.
What audit log format do you use, and is it queryable?
We use an append-only PostgreSQL table with indexed columns for actor_id, organization_id, action, and created_at. The audit log UI lets your team filter by user, action type, and date range. Organizations can export their own audit log as CSV for compliance purposes.
How do you handle GDPR data deletion requests?
We implement a self-serve account deletion flow that anonymizes personal data (replaces PII with hashed identifiers) and deletes storage objects. Audit log entries are retained with anonymized actor references as required for compliance. We document the data deletion procedure for your DPA.
How long does a B2B web app take to build?
A focused MVP with multi-tenancy, RBAC, and Stripe billing typically takes 2-3 weeks. Full enterprise builds with SAML SSO, audit logging, and API key management take 4-6 weeks. We always scope before starting.
Ready to ship?
Build Enterprise-Ready From Day One — Not as an Afterthought
Start Your ProjectOr reach us directly at hello@greta.agency
Written by the Greta Agency team · Last updated April 2025