django-captcha-kit

The same contact form, protected by six interchangeable providers. Nothing in the form code changes between them: only CAPTCHA_KIT does.

Providers

None none

Renders a hidden field and accepts everything. For development and tests.

Form field Template tag Package docs

Local Math Captcha math default

A small sum solved locally. No third party, no network call, no cookie.

Form field Template tag Package docs

Local Image Captcha image

Distorted characters drawn locally with Pillow. No third party, no network.

Form field Template tag Package docs

Cloudflare Turnstile turnstile

Privacy-first widget from Cloudflare, usually invisible to the visitor.

Form field Template tag Cloudflare docs

Google reCAPTCHA v2 recaptcha

The classic checkbox, verified against Google.

Form field Template tag Google docs

hCaptcha hcaptcha

Independent alternative with the same siteverify protocol.

Form field Template tag hCaptcha docs

Switching provider

The demo picks the provider from the URL, but a real project names one in its settings:

CAPTCHA_KIT = {
        "DEFAULT": "turnstile",
        "PROVIDERS": {
            "turnstile": {
                "SITE_KEY": env("TURNSTILE_SITE_KEY"),
                "SECRET_KEY": env("TURNSTILE_SECRET_KEY"),
            },
        },
    }

Changing DEFAULT is the whole migration. Try it by editing CAPTCHA_DRIVER in .env, then reload the form mixin page.