AI-Native SaaS MVP for San Francisco Startup — 6 Weeks
Devs & Logics delivered an AI-native B2B SaaS MVP for a San Francisco startup with multi-tenant RAG over customer documents, streaming chat UI, OpenAI integration, usage limits, and Stripe subscriptions—live in six weeks on Vercel.
A SOMA founder needed an AI-native SaaS demo for seed conversations—not a ChatGPT wrapper. Devs & Logics shipped document Q&A with RAG, streaming responses, per-seat billing, and token metering in six weeks.
The challenge
The Bay Area team had LOIs hinging on “AI inside our workflow,” but only a prototype using pasted API keys. They needed tenant-isolated document ingestion, cited answers, rate limits, and a billing path before demo day.
What Devs & Logics delivered
- Scoped MVP: upload PDFs, RAG Q&A with citations, team invites, admin usage dashboard
- Next.js 15 + TypeScript with streaming API routes and server-side API keys
- pgvector on PostgreSQL for per-organization embeddings
- Per-org token budgets and feature flags to cap model spend
- Stripe Billing for seat-based SaaS plans
- Evaluation set of 40 prompts before investor demo week
Outcomes
- MVP live in 6 weeks with documented eval pass rate for core prompts
- Closed two design-partner LOIs within 30 days of launch
- Used in live Bay Area investor meetings with sub-3s median response start
- Retained for agent-style workflow phase two
Technologies
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