How to Choose a SaaS Development Company or Developer

Agency, freelancer, or in-house?

Agencies offer a full team but cost more and add layers between you and the people writing code. In-house hiring gives control but takes months. A senior freelance full stack developer is often the fastest way to an MVP: one person who designs the architecture, writes the code, and deploys it — with direct communication.

Technical foundations to check

• ▹Multi-tenant architecture with proper data isolation between customers.
• ▹Authentication, teams, roles, and permissions.
• ▹Subscription billing with Stripe: plans, trials, upgrades, invoices, webhooks.
• ▹A modern, maintainable stack (for example Next.js, NestJS, TypeScript, PostgreSQL).
• ▹Automated deployment and environments for staging and production.
• ▹Logging, error tracking, and backups.

10 questions to ask before hiring

• ▹Which SaaS products have you built, and what was your role?
• ▹How do you handle multi-tenancy and data isolation?
• ▹How will billing and subscription changes work?
• ▹What would you cut from my feature list for the MVP?
• ▹Who owns the code, domain, and cloud accounts?
• ▹How often will I see working progress?
• ▹How do you handle security and secrets?
• ▹What happens after launch — support, maintenance, new features?
• ▹Can AI features be added later without a rewrite?
• ▹Can I speak to a past client or see live work?

Red flags

• ▹A fixed price for a vague scope with no discovery.
• ▹No access to the code repository until the end.
• ▹Cloud accounts registered in the developer's name.
• ▹No questions about your users or business model.

Planning for AI from day one

Many new SaaS products include AI features — assistants, summaries, smart search, or automations. Even if you launch without them, a developer with AI integration experience will structure your data and backend so these features can be added cleanly later.