Alternatives and similar repositories for recaptcha

Users that are interested in recaptcha are comparing it to the libraries listed below

• facebookarchive / php-graph-sdk
  The Facebook SDK for PHP provides a native interface to the Graph API and Facebook Login. https://developers.facebook.com/docs/php
  ☆3,205Updated 3 years ago
• maxmind / GeoIP2-php
  PHP API for GeoIP2 webservice client and database reader
  ☆2,457Updated last week
• aws / aws-sdk-php
  Official repository of the AWS SDK for PHP (@awsforphp)
  ☆6,170Updated this week
• serbanghita / Mobile-Detect
  Mobile_Detect is a lightweight PHP class for detecting mobile devices (including tablets). It uses the User-Agent string combined with sp…
  ☆10,677Updated 7 months ago
• Seldaek / monolog
  Sends your logs to files, sockets, inboxes, databases and various web services
  ☆21,370Updated 3 weeks ago
• defuse / php-encryption
  Simple Encryption in PHP.
  ☆3,862Updated last year
• swiftmailer / swiftmailer
  Comprehensive mailing tools for PHP
  ☆9,489Updated 4 years ago
• sendgrid / sendgrid-php
  The Official Twilio SendGrid PHP API Library
  ☆1,527Updated 10 months ago
• guzzle / guzzle
  Guzzle, an extensible PHP HTTP client
  ☆23,450Updated 4 months ago
• phpseclib / phpseclib
  PHP Secure Communications Library
  ☆5,545Updated this week
• lcobucci / jwt
  A simple library to work with JSON Web Token and JSON Web Signature
  ☆7,460Updated last week
• ezyang / htmlpurifier
  Standards compliant HTML filter written in PHP
  ☆3,351Updated 2 months ago
• thephpleague / oauth2-server
  A spec compliant, secure by default PHP OAuth 2.0 Server
  ☆6,633Updated 3 weeks ago
• KnpLabs / snappy
  PHP library allowing thumbnail, snapshot or PDF generation from a url or a html page. Wrapper for wkhtmltopdf/wkhtmltoimage
  ☆4,468Updated last month
• paypal / PayPal-PHP-SDK
  Deprecated in favor of:
  ☆41Updated 4 months ago
• thephpleague / oauth2-client
  Easy integration with OAuth 2.0 service providers.
  ☆3,769Updated 3 weeks ago
• predis / predis
  A flexible and feature-complete Redis/Valkey client for PHP.
  ☆7,743Updated this week
• filp / whoops
  PHP errors for cool kids
  ☆13,251Updated 3 weeks ago
• mailgun / mailgun-php
  Mailgun's Official SDK for PHP
  ☆1,135Updated last week
• michelf / php-markdown
  Parser for Markdown and Markdown Extra derived from the original Markdown.pl by John Gruber.
  ☆3,460Updated 6 months ago
• phpDocumentor / phpDocumentor
  Documentation Generator for PHP
  ☆4,301Updated last week
• briannesbitt / Carbon
  A simple PHP API extension for DateTime.
  ☆16,651Updated last week
• googleapis / google-api-php-client
  A PHP client library for accessing Google APIs
  ☆9,714Updated last month
• erusev / parsedown
  Better Markdown Parser in PHP
  ☆14,992Updated 3 months ago
• ramsey / uuid
  A PHP library for generating universally unique identifiers (UUIDs).
  ☆12,604Updated last week
• ircmaxell / password_compat
  Compatibility with the password_* functions that ship with PHP 5.5
  ☆2,139Updated last year
• thephpleague / flysystem
  Abstraction for local and remote filesystems
  ☆13,547Updated last month
• vlucas / phpdotenv
  Loads environment variables from `.env` to `getenv()`, `$_ENV` and `$_SERVER` automagically.
  ☆13,492Updated 7 months ago
• cocur / slugify
  Converts a string to a slug. Includes integrations for Symfony, Silex, Laravel, Zend Framework 2, Twig, Nette and Latte.
  ☆2,906Updated 3 weeks ago
• JayBizzle / Crawler-Detect
  🕷 CrawlerDetect is a PHP class for detecting bots/crawlers/spiders via the user agent
  ☆2,299Updated last month