Se puede poner un Captcha en el Formulario Version Gratis??????

Se puede poner un Captcha en el Formulario Version Gratis??????

Quiero poner un Captcha a mi formulario para evitar el spam
en la opción de Herramientas avanzadas dentro de la edición de mi formulario me aparece el captcha pero no puedo habilitarlo o arrastrarlo para poder integrarlo.
Mi duda es :
el captcha solo esta disponible en la version de paga??????????????????????
Gracias

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