BaseCloud

BaseCloud Shield is a lightweight yet powerful security plugin that enforces Two-Factor Authentication (2FA) on your WordPress login page. Unlike other bloat-heavy plugins, BaseCloud Shield focuses on reliability and flexibility in OTP delivery.
Key Features:
<ul>
<li>Plug & Play: Works immediately using standard WordPress email delivery.</li>
<li>Multi-Recipient System: Send OTPs to the logging-in user, a manager email, or selected users.</li>
<li>Multi-Channel Delivery: Choose multiple delivery methods simultaneously (Email, SendGrid, WhatsApp, SMS, Webhook).</li>
<li>WhatsApp Integration: Send OTPs directly via WhatsApp using Twilio API.</li>
<li>SMS Integration: Deliver OTPs via SMS using Twilio API.</li>
<li>SendGrid API V3: Native integration for high-deliverability emails.</li>
<li>Webhook Support: Connect to custom webhooks for advanced automation flows.</li>
<li>Secure OTPs: 6-digit one-time passwords that expire automatically.</li>
<li>Browser Trust: “Remember this device” functionality to reduce friction for authorized users.</li>
<li>Advanced Attack Protection (v1.4.2): Credential stuffing detection, progressive delays, username enumeration protection.</li>
</ul>
<h3>External Services</h3>
This plugin may connect to external third-party services depending on your configuration. Below is a detailed explanation of what services are used, what data is sent, and when:
SendGrid Email API (Optional)
If you select “SendGrid API” as your delivery method in the plugin settings, this plugin will send data to SendGrid’s email service to deliver one-time password (OTP) codes.
<ul>
<li>Service: SendGrid by Twilio</li>
<li>What it’s used for: Sending two-factor authentication codes via email with improved deliverability</li>
<li>When data is sent: Every time a user attempts to log in and 2FA is enabled</li>
<li>Data sent:
<ul>
<li>Recipient email address (user’s email or manager email if configured)</li>
<li>Sender email address (configured in plugin settings)</li>
<li>Site name</li>
<li>Username attempting to log in</li>
<li>6-digit one-time password code</li>
<li>Email subject and HTML body</li>
</ul>
</li>
<li>API Endpoint: https://api.sendgrid.com/v3/mail/send</li>
<li>Terms of Service: https://www.twilio.com/legal/tos</li>
<li>Privacy Policy: https://www.twilio.com/legal/privacy</li>
</ul>
Important: You must have a SendGrid account and API key to use this feature. You are responsible for complying with SendGrid’s terms of service and ensuring proper data handling practices.
Twilio API for WhatsApp & SMS (Optional)
If you select “WhatsApp” or “SMS” as delivery methods, the plugin will send data to Twilio’s API to deliver one-time password codes.
<ul>
<li>Service: Twilio</li>
<li>What it’s used for: Sending two-factor authentication codes via WhatsApp and/or SMS</li>
<li>When data is sent: Every time a user attempts to log in and 2FA is enabled with WhatsApp/SMS selected</li>
<li>Data sent:
<ul>
<li>Recipient phone number (from user meta field ‘billing_phone’)</li>
<li>Sender phone number (WhatsApp number or SMS number configured in settings)</li>
<li>Site name</li>
<li>Username attempting to log in</li>
<li>6-digit one-time password code</li>
<li>Message body</li>
</ul>
</li>
<li>API Endpoint: https://api.twilio.com/2010-04-01/Accounts/{AccountSid}/Messages.json</li>
<li>Terms of Service: https://www.twilio.com/legal/tos</li>
<li>Privacy Policy: https://www.twilio.com/legal/privacy</li>
</ul>
Important: You must have a Twilio account with WhatsApp and/or SMS capabilities enabled. Phone numbers must be stored in user meta (field: ‘billing_phone’). You are responsible for complying with Twilio’s terms of service.
Custom Webhook (Optional)
If you select “Webhook” as a delivery method, the plugin will send login notification data to a webhook URL you configure.
<ul>
<li>Service: Custom webhook endpoint (configured by you)</li>
<li>What it’s used for: Sending login notifications to external systems for custom processing</li>
<li>When data is sent: Every time a user attempts to log in and 2FA is enabled</li>
<li>Data sent:
<ul>
<li>Site name</li>
<li>Username attempting to log in</li>
<li>User email address</li>
<li>6-digit one-time password code</li>
<li>Recipient information array</li>
<li>Timestamp of login attempt</li>
</ul>
</li>
<li>Endpoint: User-configured webhook URL</li>
</ul>
Important: When using the webhook option, you are responsible for the security and privacy compliance of the endpoint you configure. Ensure your webhook endpoint uses HTTPS and follows proper data protection practices.
Standard WordPress Email (Default)
By default, this plugin uses WordPress’s built-in <code>wp_mail()</code> function, which does not involve any external services unless your WordPress installation is configured to use a third-party SMTP service.

BaseCloud Shield

Enterprise-grade Two-Factor Authentication (2FA) with support for Email, SendGrid API, Webhooks, WhatsApp, and SMS delivery.

rijensky

OtpPal lets your WordPress site send and verify OTP (One-Time Password) messages via WhatsApp. This plugin enables secure phone number verification for your WordPress forms, helping prevent spam and ensuring legitimate user submissions.
Key Features:
<ul>
<li>WhatsApp OTP Delivery: Send one-time passwords directly to users via WhatsApp</li>
<li>Form Plugin Integrations: Seamless integration with various wordpress form plugins for phone verification</li>
<li>Flexible Phone Input: Support for both international and national phone number formats</li>
<li>Easy Configuration: Simple setup through WordPress admin panel</li>
<li>Secure Verification: Server-side validation ensures secure OTP verification</li>
<li>Rate Limiting: Built-in protection against abuse (OtpPal.com)</li>
<li>Customizable UI: Clean, responsive lightbox interface for OTP input</li>
</ul>
Use Cases:
<ul>
<li>Passwordless Logins</li>
<li>Verify phone numbers in contact forms</li>
<li>Prevent spam submissions with phone verification</li>
<li>Ensure legitimate user contact information</li>
</ul>
<h3>Configuration</h3>
<ol>
<li>Navigate to OtpPal > Settings in your WordPress admin panel</li>
<li>Enter your OtpPal API key</li>
<li>Choose your preferred Phone Format:
<ul>
<li>International: Users enter phone numbers with country code (e.g., +1234567890)</li>
<li>National: Users enter phone numbers without country code (e.g., 1234567890)</li>
</ul>
</li>
<li>If using National format, select a Default Country for phone number validation</li>
<li>Click Save Settings</li>
</ol>
<h3>Usage</h3>
Enable passwordless login by embedding the login button anywhere on your site with the [otppal_login] shortcode. 
Add an in-form verifiable phone input using the otppal_phone input, or add a verification modal using the otppal_verify input. 
You can customize the appearance of the login button and the verification modal in the plugin’s config.
OtpPal supports CF7, Elementor Pro, WPForms, Gravity Forms, Fluent Forms, Ninja Forms, Formidable Forms, SureForms 
If you need another integration, please to contact us.
OtpPal will automatically:
<ul>
<li>Initialize the embedded phone widget using your global OtpPal settings (phone format, default country).</li>
<li>Intercept the form submission, open the OTP modal, and only submit after successful verification.</li>
<li>
Write the verified phone number into a hidden field so your form plugin receives it like any other field.
</li>
<li>
Use either <code>otppal_phone</code> or <code>otppal_verify</code> in a single form – never use both.
</li>
</ul>
<h3>Support</h3>
For support, please visit the plugin’s support forum or contact the plugin author.

OtpPal

Client-side plugin for OtpPal – Send and verify OTPs via WhatsApp.

BaseCloud Shield vs OtpPal