CodesSavvy is a SaaS development company run as a senior engineering studio. We build production-ready multi-tenant SaaS platforms for B2B startups — Stripe billing, role-based access control, admin dashboards, tenant isolation. Built on Next.js, PostgreSQL with row-level security, and Vercel. Fixed price. Ships in 8 to 14 weeks for startups in the US, UK, Canada, and Australia.
SaaS Development Company
for Multi-Tenant B2B Platforms
Multi-tenancy, subscription billing, RBAC, and admin dashboards built in from week one — not bolted on later. We design SaaS architecture that scales from your first paying customer to ten thousand without expensive rewrites.
The Decision That Defines Your SaaS
Multi-Tenancy Architecture: Which Model Fits Your SaaS?
Picking the wrong multi-tenancy model at launch is the single most expensive mistake in B2B SaaS — it forces a complete data layer rewrite when you hit scale. We decide this in week one based on your scale, isolation, and compliance requirements.
Model A · Default
Shared Database with Row-Level Security
All tenants share one database. A tenant_id column scopes every query. PostgreSQL row-level security enforces isolation at the database layer.
Best for: Most B2B SaaS, 1 to 10,000+ tenants
Cost: Lowest
Isolation: Logical (database-enforced)
Scaling ceiling: Effectively unlimited
Model B · Middle Ground
Schema-per-Tenant
One database, one PostgreSQL schema per tenant. Stronger logical isolation than shared. Schema migrations are the operational pain point as tenant count grows.
Best for: 50 to 500 tenants, moderate isolation
Cost: Moderate
Isolation: Schema-level
Scaling ceiling: Migrations slow past ~500 schemas
Model C · Compliance
Database-per-Tenant
Each tenant gets a fully isolated database. Highest cost, strongest isolation. Required for some healthcare and financial verticals where data isolation is contractual.
Best for: Healthcare, financial, regulated
Cost: Highest
Isolation: Physical
Scaling ceiling: Operational, not technical
Our default for new SaaS: Model A (shared DB with row-level security). It works for the overwhelming majority of B2B SaaS, costs the least to operate, and scales indefinitely. We only recommend Model B or C when isolation requirements are real — typically driven by enterprise contracts, compliance auditors, or a specific industry pattern.
What Is Included in a CodesSavvy SaaS Build
Every B2B SaaS we ship starts with the same production foundation. These are the elements that bolt on later expensively if they are not designed in from week one.
Multi-Tenant Foundation
Tenant model, row-level security, scoped API access, tenant-aware logging. The structural decisions that determine whether your SaaS can serve 10 customers or 10,000.
Stripe Subscription Billing
Monthly + annual plans, usage-based billing, free trials, upgrades and downgrades with prorating, failed payment recovery, customer portal, full webhook handling.
Auth, RBAC & Team Management
Email + OAuth + SSO (SAML for enterprise), invite flows, organization membership, role-based permissions enforced at the data layer — not just the UI.
Admin & Tenant Dashboards
Per-tenant dashboards for end users, an internal admin for your team. Usage metrics, billing state, support tooling, feature flags.
Production Database Layer
PostgreSQL schema designed around the access patterns, Prisma ORM with type safety, RLS policies, automated migrations, seed scripts, backup strategy.
Audit Logging & Compliance Hooks
Every meaningful action is logged with actor, timestamp, and context. SOC 2 ready, HIPAA pattern where required. You can answer the auditor questions before they ask.
The Other Architecture Decision
SaaS Pricing Models: Which One Fits Your Product
How you charge defines your product as much as what you build. Picking the wrong pricing model at launch costs revenue and conversion — and switching models later is harder than it looks.
We do not pick your pricing model for you — that is a business decision. But we build the billing layer to match the model you choose, including the supporting infrastructure (usage metering, seat counting, plan transitions) that most SaaS billing implementations get wrong the first time.
Our Process
How We Build Your SaaS
A B2B SaaS build is not a single sprint — it is structured in phases. Each phase ends with a working product you can use, not a progress report.
Architecture Decisions Locked
Multi-tenancy model picked. Auth + RBAC schema designed. Pricing model + Stripe structure mapped. Database schema reviewed. Written scope with fixed price.
Production Scaffold + Auth
Working SaaS shell with multi-tenant auth, organization model, RBAC, and Stripe billing live in staging. You can sign up, create an org, invite teammates, and pay before any product features are built.
Core Product Build
Your actual product features layered on top of the scaffold. Weekly demo on staging URL. Every Friday you get a working build to test. Feedback loops in days, not weeks.
Polish, Audit Logging, Handoff
Performance pass. Lighthouse audit. Audit log review for compliance hooks. Documentation. Repository and infrastructure handoff. The team that builds it walks your team through every component.
The SaaS Stack We Build On
Same stack across every B2B SaaS we ship — proven across multi-tenant production deployments, optimized for the patterns SaaS actually needs.
Frontend & Framework
- Next.js 14/15 App Router
- React 19 Server Components
- TypeScript strict mode
- Tailwind CSS + shadcn/ui
Database & Data Layer
- PostgreSQL with row-level security
- Prisma ORM with type safety
- Redis for caching + queues
- Automated migrations + seed scripts
Auth, Billing & Tenant Mgmt
- Clerk, Auth0, or WorkOS for auth + SSO
- Stripe (subscriptions + usage + portal)
- Tenant-scoped middleware
- Webhook handling + retry logic
Infrastructure & Observability
- Vercel for frontend + serverless
- AWS RDS or Supabase for Postgres
- Sentry error tracking
- Audit log + metrics dashboards
Case Study
SaaS We Are Proud Of
ProposalGenie — AI-Powered Proposal Generator SaaS ↗
Freelancers spend 30 to 60 minutes writing each proposal on Upwork and Fiverr. Most get rejected. The founder needed an AI tool that analyzes job posts and generates tailored proposals in seconds — and a real SaaS billing model around it.
We built an AI-powered SaaS on Next.js, OpenAI, and PostgreSQL. Multi-tenant from day one, Stripe billing with usage-based credits, tone and length controls. Prompt engineering tuned to make AI proposals feel authentic.
Why Founders Pick Us as Their SaaS Development Company
Multi-Tenancy Decided Day One
We pick the tenancy model in week one based on your scale and isolation needs. No SaaS we have shipped has needed a data layer rewrite — because we did not pick the wrong model at launch.
Billing That Handles Edge Cases
Failed payments, mid-cycle plan changes, prorating, free trial conversions, cancellation flows. We ship Stripe integration that handles the cases your customers will actually hit — not just the happy path.
Senior Engineers, No Account Managers
The engineers you speak to in discovery are the engineers building your SaaS. Every engineer has shipped production B2B SaaS before. Real experience with the patterns, not just the frameworks.
Fixed Price With No Surprise Add-Ons
You see the architecture decisions, the scope, and the price before week three begins. No hourly billing. If we scoped something wrong, that cost is ours.
SaaS Development — Frequently Asked Questions
Get a Free SaaS Architecture Review
Tell us what SaaS you are building or operating. We send back a written review covering tenancy model, billing model, RBAC structure, and what to fix first. No sales call required.
Request Your Review