Invoice and expense pain, React + Supabase starter

Invoice and expense pain, React + Supabase starter targets a $3.0B = 5,000,000 SMBs x $600 ARPU per year, representing the broader invoice and expense SaaS spend for SMB customers total addressable market with medium saturation and a year-over-year growth rate of 8-12% annual growth in SMB fintech and embedded payments adoption.

Key trends driving demand: BaaS and serverless adoption -- lowers infrastructure cost and time to market for full stack templates; Developer-first products -- increasing preference for code-first starter kits rather than black-box SaaS; Embedded finance and payments -- SMBs demand integrated billing, driving demand for turnkey invoice flows; Shift to remote lean engineering teams -- higher willingness to buy ready-made modules to save developer hours.