WooCommerce reCaptcha Plugin is the best solution that provides all in one captcha for  WooCommerce as well as WordPress.

reCaptcha for WooCommerce Features

• Protection from spam
• Protection from unauthorized login attempts
• Stop fake registrations
• Stop fake guest orders
• Low friction, effortless interaction for users
• Easy for customers, Hard for bots
• Enable it to required places only
• login reCaptcha
• registration reCaptcha
• Lost password reCaptcha
• Guest checkout reCaptcha
• Login user checkout reCaptcha
• Add payment method reCaptcha
• WooCommerce pay for order captcha
• WP-Login reCaptcha
• WP-Register reCaptcha
• WP-Lost password reCaptcha
• Custom label for reCaptcha
• Custom error messages
• Recaptcha dark/light theme
• Captcha full/compact mode
• Auto-detect user language
• Disable submit button until captcha checked
• Reset captcha on order postback error