Submit JSON vs SlapForm
Choosing the right form backend

Submit JSON vs SlapForm


A quick summary

When comparing these two products, the main differences that stand out are plan limits, feature offering, and overall design philosophy.

A SlapForm "Sumo" plan costs $16/month with 2000 monthly submissions. Compare that to Submit JSON's $15/month plan with a submission limit of 10,000. Submit JSON's hobby plan at $5 has more submissions than that!

Regardless, it's another Formspree clone. SlapForm's HTML-first approach is misguided, where the cons far outweigh the pros.

In comparison, Submit JSON's API-first approach is more versitile, secure, and aligned with modern web development best practices.

Which is the best form backend for you? We think the answer is obvious, but we'll let you decide.

Compare pricing and features

Submit JSON
Free submission limit25050
Basic submission limit2,500 @ $5/month500 @ $10/month
Pro submission limit25,000 @ $30/month10,000 @ $29/month
Number of endpoints (pro plan)UnlimitedUnlimited
JavaScript (TS) Client SDK
Data storage
Data export
Search submissions
Linked Emails
Free endpoint security
API key security
Restricted domains
Honeypot fields
Slack app
Zapier integration
reCAPTCHA integration
Cloudflare Turnstile integration
hCaptcha integration
We're biased, but honest

When to choose SlapForm, and when Submit JSON?

Submit JSON
  • Greater value - Submit JSON's submission limit is 5x greater than SlapForm's on average.
  • Go beyond form submissions - Submit JSON is not only a form backend, it doubles as a powerful notification API
  • Plays nice with JS frameworks and TypeScript projects. Formspree, not so much.
  • To be honest, there really isn't a good reason to use this service over Submit JSON.
  • It's more expensive, less versatile, and less secure due to their HTML first approach.
  • We were not able to make a successful SlapForm submission, their website appears to be broken!
Made for pros pushing to production

Why developer teams prefer Submit JSON

Submit JSON FAQs

Frequently asked questions

Is it easy to migrate from SlapForm to Submit JSON?
Do I need a credit card to sign up?
How can I talk to someone about Submit JSON?
Why is Submit JSON so affordable?
How does Submit JSON stand out against other form backends?
When should I switch to Submit JSON?

Get notified in 5 minutes

Submit JSON delivers your submissions via email, integrations, and webhooks. Set up takes less than 5 minutes.