Form backend pricing calculator
Enter how many submissions your forms get in a month and choose monthly or yearly billing. The table shows the cheapest plan on each form backend that covers that volume, what it costs over a year, and what happens if you go over. Every competitor price was read off that service's own pricing page on the date in its row, and links back to it. WebForms is in the table too, sorted by cost like the rest.
At 1,000 submissions a month, billed monthly, the cheapest plan that covers it is Formspark Upgrade at $25 for a year of submissions, prepaid. WebForms Pro is $60 a year.
| Service | Cheapest plan that covers it | Per month | Per year | Over the limit | Checked |
|---|---|---|---|---|---|
| Formspark | Upgrade50,000 per bundlePrepaid bundles; the yearly cost is what twelve months at your volume uses up. | Prepaid$25 per bundle | $251 bundle in a year | Nothing renews: when a bundle runs out you buy another. Bundles do not expire. | |
| Formkeep | Essential1,000 a monthPaid plans include 1, 3 or 10 forms; each extra form costs more. | $4.99 | $59.88 | Not stated on its pricing page. | |
| WebForms (this site) | Pro12,000 a month | $5 | $60 | A plan at its limit stops accepting submissions until its quota resets. There are no overage charges. | Current |
| splitforms | Pro5,000 a monthThe free allowance is 500 submissions in total and does not refill. | $5 | $60 | Its pricing page does not say what happens past the quota. Honeypot-flagged spam does not count. | |
| FormBackend | Simple1,000 a month | $5 | $60 | Notifies you before you reach the limit. Its pricing page does not say what happens to submissions after it. | |
| Web3Forms | Pro10,000 a monthPrices shown to US visitors; Web3Forms localises them by country. | $15 | $180 | Warns at 90% and 100% of the limit, then stops accepting new submissions until the next month. | |
| Slapform | Sumo2,000 a month | $16 | $192 | Its plans list $0.01 per extra submission on Apprentice and Sumo; its FAQ describes a short grace period, then an upgrade. Blocked spam does not count. | |
| FormBucket | StandardNo published capOne flat-rate plan after a 14-day free trial; no free plan. | $19 | $228 | Publishes no submission cap. | |
| Forminitformerly Getform | Pro5,000 a month | $19 | $228 | Forms pause and reject new submissions until the allowance renews or you upgrade. Submissions sent while paused are not stored. | |
| Formcarry | Basic2,000 a month | $19 | $228 | Holds extra submissions until the 1st of the next month; you can only see them after upgrading. | |
| KwesForms | Bronze1,000 a month | $19 | $228 | Not stated on its pricing page. | |
| Basin | Growth1,000 a monthPrices before promotional coupons. | $29 | $348 | Keeps delivering past the cap and bills extra submissions per 1,000, from $5.25 per 1,000. Spam does not count. | |
| Formspree | Professional2,000 a month | $30 | $360 | Emails you at 50%, 75% and 90% of the monthly limit and when it is exceeded. Its help centre does not say what happens to submissions past the limit. |
Each competitor's plans were read from its own pricing page on the date in its row; the date links to that page so you can check the current figure. Prices are shown in the currency each service quotes. "About" marks a yearly total worked out as twelve times a per-month price, because the page did not state the total. Only plans whose included allowance covers your volume are picked, so where a service bills for extra submissions, a smaller plan plus overage can cost less than shown. Everything is calculated in your browser.
How form backend pricing is structured
Nearly every form backend sells the same shape of plan: a monthly allowance of submissions, with more destinations and features unlocked as the allowance grows. They differ most at the first paid step. Formspree's first paid plan is $15 a month for 200 submissions; WebForms Pro is $5 a month for 12,000. A headline price means little until you hold it against the volume you actually need, which is what the calculator does.
Three things break the simple pattern. Yearly billing is cheaper almost everywhere, and a few tiers are only sold yearly, such as Formcarry's Starter. Formspark sells prepaid bundles instead of a subscription: 50,000 submissions for a one-time $25, which never expire, so the calculator counts how many bundles a year at your volume would use. And some services keep accepting submissions past the allowance and bill for the extra: Basin per 1,000, Slapform per submission on its lower plans. The calculator only picks a plan whose included allowance covers you, so with metered overage a smaller plan can work out cheaper than the table shows.
Two services are left out on purpose. Netlify Forms is priced as part of Netlify hosting rather than on its own, and FormSubmit has no paid plans to compare.
What counts as a submission
On WebForms, each accepted POST counts once, however many destinations it is delivered to. Test submissions count like any other, because they are delivered. Spam that the filter quarantines is stored but never delivered and never counted. Free resets on the 1st of each month and paid plans on their billing date. A plan at its limit refuses new submissions until it resets: there are no overage charges, and nothing already stored is deleted.
Other services draw the line differently. Basin and Slapform both say spam they block does not count toward the limit. Formspark's free allowance is 250 submissions per account in total, not per month. Two numbers that look alike can measure different things, so read the definition before comparing them.
Is Formspree free?
Up to a point. Formspree's free plan allows 50 submissions a month and is labelled for testing and development. Paid plans start with Personal at $15 a month, or $10 a month billed yearly, for 200 submissions; Professional and Business raise the limit to 2,000 and 20,000. Its help centre says it emails you at 50%, 75% and 90% of the monthly limit and again once it is exceeded. These figures were checked on 24 Oct 2026; the Formspree comparison covers what else differs.
Web3Forms pricing
Web3Forms' free Personal plan allows 250 submissions a month. Pro is $15 a month or $149 a year for 10,000, and Agency & Team is $39 a month or $399 a year for 20,000. A $49 yearly Starter plan with 5,000 a month is available by application, for students, early-stage startups and non-profits. These are the prices Web3Forms shows visitors from the US; it localises prices by country, so yours may differ. At the limit it stops accepting new submissions until the next month. Checked on 24 Oct 2026; see the Web3Forms comparison for the rest.
What to compare besides price
The cheapest row is not automatically the right one. Check where each plan can deliver: WebForms Free sends to email only, and Slack, Discord, Telegram, webhooks and Zapier start on Pro. Check how long submissions are kept, which on WebForms is 30 days on Free, 180 on Pro and 365 on Agency. And check whether you can see what happened to each delivery: WebForms keeps a delivery log per destination, so a notification that failed shows up instead of going missing quietly. Count your forms too, since several services cap them per plan; WebForms has unlimited forms on every plan.
Every limit on each WebForms plan is on the pricing page. The form backend directory lists free tiers and entry prices side by side, the alternatives pages compare WebForms with one service at a time, including Basin and Forminit, and the head-to-head comparisons set two competitors against each other.