B2B SaaS

B2B SaaS Platform Development

We build custom B2B SaaS platforms with multi-tenant architecture, subscription billing, robust APIs, data dashboards and converting onboarding flows. From idea to recurring MRR with technology that scales.

Request free consultation Explore features
The challenge

Building a successful B2B SaaS requires the right architectural decisions from day one

B2B SaaS platform development is one of the most demanding software engineering projects. Early decisions (tenancy model, billing architecture, API design, permissions model) determine whether your platform can scale from 10 to 10,000 customers without rewriting the system. A poorly architected SaaS becomes a technical and operational nightmare that blocks business growth.

The B2B SaaS model has technical requirements that set it apart from any other type of software. Multi-tenancy requires data isolation between clients without sacrificing performance. Subscription billing needs to manage plans, upgrades, downgrades, prorations, trial periods and international invoicing with different currencies and taxes. The API must be robust enough for customers to build integrations on your platform. And onboarding must guide users so they activate the product's value in their first session.

Additionally, a successful B2B SaaS needs observability: business metrics (MRR, churn, LTV, CAC) and technical metrics (latency, error rates, usage per tenant) integrated into dashboards enabling real-time decision-making. B2B customers expect availability SLAs, enterprise security (SSO, audit logs, RBAC) and support for customization without compromising system stability.

At Soamee we have built multiple B2B SaaS platforms in production. From InfoAdex, the reference platform for advertising investment in Spain, to Somos Musica, the music rights management platform. Through Cawa, the social commerce engine, and eEvidence, the digital evidence certification platform. Each with its own technical and business requirements, but all sharing the same pillars of well-designed SaaS architecture.

Multi

Multi-tenant architecture

MRR

Recurring billing

API

API-first design

SOC2

Enterprise security

Key features

What we build in every B2B SaaS platform

The technical pillars every B2B SaaS needs to scale with confidence.

Multi-tenancy

Multi-tenant architecture that securely isolates each customer's data without compromising performance. Support for shared tenancy (one schema, multiple clients), schema-per-tenant or database-per-tenant models depending on required isolation level. Row-level security in PostgreSQL, tenant-aware queries and tenant resolution middleware by domain, subdomain or API key.

Billing and subscriptions

Complete billing system integrated with Stripe Billing, Chargebee or Paddle for subscription plans, trial periods, upgrades, downgrades, prorations, coupons and international invoicing with multiple currencies and taxes. Webhooks for subscription state sync, dunning management for failed payments and self-service portal for customer billing management.

API design

RESTful or GraphQL APIs designed with API-first principles: semantic versioning, auto-generated OpenAPI/Swagger documentation, per-tenant rate limiting, OAuth2/API key authentication, consistent pagination and standardized error handling. Webhooks for real-time event delivery. Auto-generated SDKs in common languages for easy integration.

Dashboards and analytics

Data dashboards for platform users with interactive visualizations, advanced filters, Excel/CSV export and scheduled report generation. For internal management: SaaS business metrics (MRR, churn, LTV, ARR, expansion revenue) and technical metrics (per-tenant usage, latency, error rates). Built with React + D3/Recharts and optimized analytical query backend.

Onboarding

Guided onboarding flows that activate product value in the first session. Step-by-step setup wizards, data import from Excel/CSV or external APIs, pre-built templates, progress checklists and contextual tooltips. Interactive product tours for advanced features. Activation metrics to measure where users drop off and continuously optimize.

Enterprise security

Single Sign-On (SSO) with SAML 2.0 and OpenID Connect for B2B customers to use their corporate identity provider. Role-Based Access Control (RBAC) with granular per-tenant roles and permissions. Immutable audit logs of all actions. At-rest and in-transit encryption. GDPR compliance with data export and deletion features. SOC 2 and ISO 27001 certification readiness.

Want to build or scale your SaaS platform?

Consulenza gratuita →
Tecnologie

Tecnologie we use

Modern stack optimized for high-performance SaaS platforms with multi-tenancy, billing and scalable APIs.

React Next.js Node.js TypeScript Python FastAPI PostgreSQL Redis Elasticsearch Stripe Billing Auth0 AWS Docker Kubernetes Terraform GraphQL Prisma Celery RabbitMQ Datadog
Casi studio

B2B SaaS platforms we have built

SaaS products in production with real customers and verifiable impact metrics.

InfoAdex

Spain's reference SaaS platform for advertising investment analysis. Data dashboards with billions of records, API for agencies and advertisers.

Ad investment reference

Somos Musica

Music rights and royalties management platform. Multi-tenancy for record labels, automatic revenue distribution and real-time reporting.

Music royalty management

Cawa

Social commerce engine enabling brands to sell through content creators. Commission system, conversion tracking and brand dashboards.

Social commerce for brands

eEvidence

Digital evidence certification platform with legal validity. Mass document processing, enterprise API and regulatory compliance.

Legal digital certification

You might also be interested in

Web Development MVP for Startups Cloud & DevOps Artificial Intelligence Marketplace PropTech Vedi casi studio
FAQ

Domande frequenti about B2B SaaS development

How much does it cost to develop a B2B SaaS platform?
Cost varies enormously by complexity. A B2B SaaS MVP with core features (basic multi-tenancy, Stripe billing, dashboard and API) can be developed for 40,000-80,000 euros in 3-4 months. A complete platform with enterprise SSO, granular RBAC, advanced API, analytics and multiple integrations can exceed 150,000 euros and require 6-9 months. We always recommend starting with an MVP that validates product-market fit and scaling investment based on real traction. The most expensive mistake is building enterprise features before having your first 10 customers.
Which multi-tenancy model is best for my SaaS?
For most B2B SaaS, the shared database model with row-level security (a tenant_id in every table) is the best option: cost-efficient, easy to maintain and sufficient isolation for 90% of cases. For large enterprise clients with strict data isolation requirements, schema-per-tenant or database-per-tenant models offer greater separation at the cost of higher operational complexity. We recommend starting shared and migrating enterprise customers to more isolated models only when required.
How is billing and subscriptions managed?
We use Stripe Billing as the foundation for recurring charges, prorations, dunning and tax compliance. We build the specific business logic on top: plan logic (feature flags per plan, usage limits, seats), webhooks for subscription state synchronization, self-service billing portal and metering logic for usage-based pricing. For specific markets or advanced needs, we also work with Chargebee, Paddle or Lago (open source).
Do I need SSO and enterprise features from the start?
Not necessarily. For most B2B SaaS, enterprise features (SAML SSO, audit logs, granular RBAC, SLAs) are premium plan features sold to large customers. We recommend launching with standard authentication (email + password, magic links, Google/GitHub OAuth) and adding SSO and enterprise features when there's real demand from customers willing to pay for it. What we do recommend from day one is designing the permissions architecture to be extensible.
How is availability and performance guaranteed?
We design infrastructure for high availability from day one. Multi-AZ deployment on AWS or GCP, server auto-scaling based on load, database with read replicas and automatic failover, and CDN for static assets. Complete monitoring with Datadog or Grafana, automatic alerting with PagerDuty and incident runbooks. Typical result is 99.9%+ uptime with API response times below 200ms at p95.
Iniziamo

Let's build your B2B SaaS platform

We help you design the architecture, choose the tech stack and build your B2B SaaS with the right foundations to scale.

Request free consultation Vedi casi studio
Prenota una call gratuita →