Forms APIs

Popular first highlights editorial picks, then ranks providers by monthly downloads of their official SDKs on npm and PyPI (measured 2026-10-18). Others follow A–Z.

Gravity Forms

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Greetly

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iFormBuilder

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involve.me

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Jamform

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Jotform

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Keenforms

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LeadBoxer

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Leadformly

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Magpi

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Microsoft Forms

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naturalForms

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Netlify Forms

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Nexticy

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Ninja Forms

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OptinMonster

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Pabbly

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Pageclip

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Paperform

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PlanSo Forms for WordPress

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PlatoForms

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POPUPSMART

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POWr Form Builder

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PreciseFP

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ProntoForms

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Qrvey

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Rake.red

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Reform

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Serviceform

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SignUpAnywhere

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SmartForms

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Spacio

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StaticKit

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Tally

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ThunderMaps

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TransForm

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Tripetto

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Upflowy

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Web3Forms — Contact Forms for Static Websites

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WisePops

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Woobox

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WP Fusion

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WPForms

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Wufoo

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Zoho Forms

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Counts reflect unique named profiles assigned to this category. Documentation and integration details vary by provider.