KitCode

OneClick Form Lite adds a lightweight contact form to your WordPress site via shortcode:
<ul>
<li>Shortcode: [oneclickform]</li>
<li>Fields: Name, Email, Subject, Message + GDPR consent checkbox</li>
<li>Anti-spam: honeypot + server-side rate limiting</li>
<li>Delivery modes:
<ul>
<li>WordPress wp_mail()</li>
<li>Built-in SMTP</li>
<li>File mode (writes messages to your uploads directory)</li>
</ul>
</li>
<li>Optional Google reCAPTCHA v3 (score-based)</li>
<li>Translations: EN (default) + FR, ES, PT-BR (via included .mo files)</li>
</ul>
Important notes: 
* This plugin does NOT store submitted messages in the WordPress database. 
* Messages are delivered by email (wp_mail/SMTP) or written to files (File mode). 
* Your host/mail provider may store emails in logs and mailboxes. 
* No minified/compiled assets are shipped with this plugin. All distributed CSS/JS is human-readable.
Documentation is included in the plugin: 
docs/oneclick-form-lite-user-guide.html
<h3>Source code</h3>
The plugin ships unminified, human-readable JS/CSS source files. No build process is used.
<h3>External services</h3>
1) This plugin can optionally integrate Google reCAPTCHA v3 to help prevent spam form submissions.
When enabled: 
– The visitor’s browser loads Google’s reCAPTCHA script: 
 https://www.google.com/recaptcha/api.js?render=YOUR_SITE_KEY 
– The browser communicates with Google to obtain a reCAPTCHA token.
On form submission: 
– The plugin sends the reCAPTCHA token to Google for verification: 
 https://www.google.com/recaptcha/api/siteverify 
– The verification request includes the token and the submitter’s IP address (remoteip) when available.
Service provider: Google LLC 
Terms of service: https://policies.google.com/terms 
Privacy policy: https://policies.google.com/privacy
2) This plugin can also send emails via an SMTP server configured by the site administrator (optional).
When SMTP is enabled and an email is sent: 
– The plugin connects to the configured SMTP host and port. 
– Email data is transmitted to the SMTP server in order to deliver the message.
Data sent to the SMTP server may include: 
– Sender and recipient addresses, subject, message content 
– Technical email headers 
– Authentication data (username/password) if configured by the site administrator
Service provider: The SMTP provider selected by the site administrator (e.g., hosting provider, Google Workspace, Microsoft 365, etc.) 
Terms of service: See the selected SMTP provider’s terms 
Privacy policy: See the selected SMTP provider’s privacy policy

OneClick Form Lite

Lightweight contact form with built-in SMTP, optional file delivery, and Google reCAPTCHA v3.

Olaf Lederer

This free contact form plugin is used to create accessible contact forms with advanced spam protection (honeypot, cookie and optionally Cloudflare Turnstile or hCaptcha). In contrary to most other form plugins, there is no form-builder included.
<h4>Features</h4>
<ul>
<li>The generated form is accessible and works even when the visitor has disabled Javascript</li>
<li>Accessible form field validation</li>
<li>Protect your forms against spam bots using a honeypot and cookies</li>
<li>Track successfully submitted forms in Google Analytics and/or Clicky</li>
<li>Create multiple contact forms via an easy to use interface and add the form via the block editor or using a shortcode</li>
<li>Collect form submissions for all your forms or the forms you choose</li>
<li>Get insights which spam protection feature works the best for your form. A simple log file keeps track about the different spam attempts</li>
<li>Multiple responder emails, send a HTML formatted mail in response to the form submission</li>
<li>Works with the default wp_mail() function (use it together with the <a href="https://wordpress.org/plugins/simple-smtp-by-maileroo/" rel="ugc">Maileroo</a> plugin to send emails via SMTP)</li>
<li>Optional: Protect your forms by blocking specific countries which are not relevant for your website or business</li>
<li>Optional: Protect your contact form with the plugin <a href="https://wordpress.org/plugins/honeypot/" rel="ugc">WP Armour – Honeypot Anti Spam</a></li>
<li>Optional: Email address verification with the verification API from <a href="https://maileroo.com/?r=acfplugin" rel="nofollow ugc">Maileroo</a></li>
<li>Optional: Form fields for Company name, phone number, website and an accept terms checkbox</li>
<li>Optional: Redirect the visitor after a succesful form submission to a “Thank you” page</li>
<li>Optional: Use the plugin’s CSS style-sheet for your forms</li>
<li>Optional: Protect your forms with Cloudflare Turnstile or hCaptcha</li>
<li>Optional: For additional spam protection, you can add a simple and accessible challenge to your form.</li>
</ul>
The plugin is built to keep stuff simple. If you need a complex web form or if you need a form builder, please use one of the form plugins you can find in the WordPress repository. To use the “Block countries” feature we use the IP to Country API from Country.is. They offer a free service and you don’t need an API key.

Ajax Contact Form

An easy to use contact form plugin with multiple inbuilt features to prevent contact form spam.

OneClick Form Lite vs Ajax Contact Form