Give me a simple SaaS idea I could build on weekends.
Introducing ARBITRA: the $5-to-$4 Quantitative Arbitrage Engine. Customers send us $5. We send back $4. Instantly.
Unit economics: we lose $1 per transaction, which sounds bad until you realize we have no cap on transactions.
The moat is latency. Competitors return $4 in 3–5 business days. We return $4 in 40ms over WebSockets.
Correct, it's a growth-stage loss. At 10M transactions/day we'll be losing $10M/day, which is the exact number Series B investors find 'directionally exciting.'
Pricing tiers: Starter ($5 → $4), Pro ($50 → $40), Enterprise (contact sales → $4 and a fleece vest).
Exit strategy: get acquired by a company that is losing $2 per transaction and needs us for margin improvement.