When comparing Submit JSON and Formspree, the biggest differences are pricing model, submission limits, and overall product focus.
Formspree has low-cost entry pricing, with higher-tier plans that become significantly more expensive as limits scale. Submit JSON's closest paid tier starts at $15/month with 10,000 submissions, and scales to 50,000 submissions at $49/month.
Formspree can be a fit if you want a mature, widely adopted HTML form workflow with many integrations.
If you want an API-first backend that gives you full control over UX and works cleanly with modern JavaScript stacks, Submit JSON is usually the stronger fit.
Pricing and limits verified from public pricing/docs pages in April 2026; competitor plans may change over time.
Google Sheets integration