AI SaaS

• The product needs authenticated user or organization context around model requests.
• A PostgreSQL system of record fits users, entitlements, prompts, and application metadata.
• The team accepts hosted model APIs and must measure their variable usage separately from application hosting.
• AI SDK abstractions fit the required providers and streaming/tool-call behavior.

Next.js supplies the application surface, Clerk the user context, Neon a focused PostgreSQL system of record, Stripe the commercial account, AI SDK the model integration layer, and Vercel the managed runtime. The separation keeps model-provider choice above the infrastructure layer while preserving normal SaaS controls.^{12345679101112131618}

Cost shape

Application hosting and database usage combine with authentication, payment, and model-token or media usage. Model consumption usually dominates marginal feature cost and must be metered independently.^81114151719

Platform dependence

High unless the team preserves provider-neutral model interfaces, application-owned user IDs, portable PostgreSQL data, and a billing ledger independent from model-provider events.^{79101112131618}