Multi-tenant SaaS development, from the first schema
Multi-tenant architecture, billing, auth and APIs. ArendaOS — twelve modules, live and open to inspection at arendaos.com — is one we built and still run.
SaaS development services
SaaS products across the full stack, from database to dashboard.
Multi-tenant SaaS development
Workspace isolation, role-based access control, organisation management, and per-tenant data separation — built correctly from day one.
Subscription and billing integration
Stripe integration, plan management, usage-based billing, trial flows, and dunning. From simple monthly plans to complex metered pricing.
API-first product development
REST and GraphQL APIs with rate limiting, API key management, developer documentation, and SDKs. Built to be consumed by third parties.
Admin and analytics dashboard development
Internal admin panels, customer-facing analytics, real-time charts, and data exports. Complex data made usable for non-technical users.
Authentication and identity integration
SSO, OAuth2, magic links, 2FA, and enterprise SAML. We implement auth that your enterprise clients will require.
AI feature development for SaaS
LLM features, copilots, and AI automation built natively into your SaaS product — not bolted on as an afterthought.
SaaS tech stack we work with
Our production-proven default stack. We adapt to your existing tools when needed.
Frontend
Backend
Databases
Cloud & Infra
APIs
CI/CD
How we deliver a SaaS product
Lean delivery model designed for SaaS startups and scale-ups.
Product Scoping
We map your user flows, define the MVP feature set, and identify the highest-risk technical decisions upfront.
Architecture Design
Multi-tenancy model, data schema, API design, and infrastructure plan — documented before development starts.
Agile Sprints
2-week sprints with working demos every cycle. You can course-correct before features are fully built, not after.
QA & Security
Automated tests, OWASP security review, performance benchmarks, and GDPR compliance checks built in.
Launch
Production deployment with CI/CD, monitoring, alerting, and runbooks. Ready for real users on day one.
Growth Support
Post-launch engineering support, scaling, and new feature development as your user base grows.
How much does SaaS development cost?
The published answer, before you ask for one.
A focused SaaS MVP runs $40,000–$90,000 and ships in 8–12 weeks: frontend, backend, database, auth, billing integration and deployment — a product you can put in front of paying users.
Complex data models or AI features push delivery to 14–20 weeks and the price towards the $40,000–$120,000 AI SaaS band. The largest single driver of the spread is integration count: two integrations and eight are different projects at the same feature list, because each external system brings its own auth, rate limits and undocumented behaviour. Managed delivery is quoted fixed-price after a discovery call, with a written scope inside 48 hours.
The outstaffing model worked perfectly. Their engineers integrated into our team on day one and we never felt the timezone difference. Code quality was exceptional.
Common questions
What founders typically ask before starting a SaaS project.
Relevant case studies
Two delivery examples of the product and systems work this service supports. The first is our own product and is named, so you can open it and check every claim in it.
ArendaOS — Fleet Rental SaaS
A live multi-tenant B2B subscription platform: twelve modules, seven roles with per-section permissions, PDF contracts, encrypted personal data, and overlapping bookings refused by a database constraint rather than by validation.
Read case study →Enterprise AI Analytics Platform
A product build that combined workflow-heavy SaaS delivery with AI automation, internal review tooling, and ERP-connected operations.
Read case study →Ready to build your SaaS product?
Book a free 30-minute discovery call. We will scope your MVP and provide a fixed-price estimate within 48 hours.
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Further reading
Longer answers on scoping and cost.