FormSubmit Alternative: Nisuform vs FormSubmit
FormSubmit needs no account. You put your email address in the form and submissions arrive by email. Nisuform takes a minute to sign up and gives you an inbox that keeps every submission, without your address in the page.
Prices and limits checked
Short answer: pick FormSubmit if you want a form working with no account at all and email is all you need. Pick Nisuform if you want submissions kept in an inbox, your email address out of your page's source, and spam filtering without a CAPTCHA.
FormSubmit needs no signup. You put your email address in the form, and it emails you each submission. Nisuform asks for a free account first, and in return keeps every submission in an inbox and filters spam without asking visitors to solve a CAPTCHA.
At a glance
| Nisuform | FormSubmit | |
|---|---|---|
| Account | Free account | None, confirm your email once |
| Price | Free for 100 a month, Pro $10 a month for 5,000 | Free |
| What your HTML contains | A form key | Your email address |
| Where submissions go | An inbox with search and CSV export, plus email | |
| How long submissions are kept | Until you delete them | 30 days, uploaded files aren't kept |
| Spam protection | Honeypot, fill-time check, rate limits, duplicate checks, optional Turnstile or reCAPTCHA | reCAPTCHA on by default, blocked phrases |
| Allowed domains | Every plan | Not documented |
| Redirects, auto-replies and webhooks | Pro | Free, with special fields |
| Slack, Discord, Telegram and Google Sheets | Pro | Not documented |
Where FormSubmit is ahead
- No account. Put your address in the action URL and confirm it once.
- Free extras. Redirects, auto-responses, webhooks and CC addresses are all free, set with special fields in the form.
- Widely used. FormSubmit says more than 400,000 websites have used it.
Where Nisuform is ahead
- Your email address stays private. The page only contains a form key, so bots scraping your site can't harvest your address.
- Every submission is kept. Search your inbox, export to CSV and keep history for as long as you need it.
- No CAPTCHA by default. FormSubmit shows reCAPTCHA unless you turn it off, and advises keeping it on. Nisuform filters bots with a honeypot, a fill-time check, rate limits and duplicate detection, with Turnstile as an option.
- Allowed domains. Limit each form to your own websites so nobody else can post to it.
- Integrations and teams. Slack, Discord, Telegram and Google Sheets on Pro, separate teams with their own forms, and a Data Processing Agreement with every account.
FormSubmit pricing and limits
FormSubmit is free and needs no account. Its limits are in what it keeps and what it puts in your page:
- Short history. Its help page says submissions are kept for 30 days, and uploaded files aren't kept at all.
- Your email address is public. It sits in the form's action, where anyone reading your page's source can see it.
- reCAPTCHA by default. Visitors have to solve it unless you turn it off with
_captcha.
Nisuform Free is free too, with no credit card, for 100 submissions a month across 3 forms. Your page only holds a form key, every submission is kept with search and CSV export, and spam is filtered without a CAPTCHA. Redirects, auto-replies and webhooks, which FormSubmit includes for free, need Pro at $10 a month.
Switching from FormSubmit
Create a form
Sign in at app.nisuform.com, create a form and copy its endpoint from the Setup tab.
Change the action URL
Before <form action="https://formsubmit.co/you@example.com" method="POST">After <form action="https://api.nisuform.com/s/YOUR_FORM_KEY" method="POST">Update the special fields
Nisuform ignores fields that start with an underscore, apart from its own special fields.
- Rename
_nextto_redirect. Redirects are a Pro feature. - Rename
_replytotoemail, if your form uses it. - Remove
_subjectand set the subject in the form's Settings, Email, on any plan. - Remove
_autoresponseand turn on auto-replies in the form's settings, on Pro. - Remove
_webhookand add a webhook, on Pro. - Remove
_cc. On Pro, send notifications to a shared inbox instead. - Remove
_captcha,_templateand_blacklist. - Add the
_gotchahoneypot:
<input type="text" name="_gotcha" tabindex="-1" autocomplete="off" style="display:none">- Rename
Send a test submission
Submit the form from your live site and check that it reaches your inbox and your email.
Sources
- FormSubmit and FormSubmit help, checked October 26, 2026
- Nisuform pricing and limits
Frequently asked questions
Is FormSubmit free?
Yes. FormSubmit is free and needs no account. You put your email address in the form's action URL and confirm it once.
Does FormSubmit store submissions?
FormSubmit delivers submissions by email. Its help page says it keeps submissions for 30 days and does not keep uploaded files.
Is it safe to put my email address in a form's action?
Anyone can read it in your page's source, including bots that collect addresses for spam. With Nisuform, the page only contains a form key, which can't be used to read submissions or find your email address.
Can I switch from FormSubmit without rewriting my form?
Yes. Change the action URL and rename a few special fields, such as _next to _redirect. Your inputs stay as they are.