Alternatives and similar repositories for recaptcha

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

• aws / aws-sdk-php
  Official repository of the AWS SDK for PHP (@awsforphp)
  ☆6,161Updated last week
• sendgrid / sendgrid-php
  The Official Twilio SendGrid PHP API Library
  ☆1,525Updated 8 months ago
• swiftmailer / swiftmailer
  Comprehensive mailing tools for PHP
  ☆9,497Updated 4 years ago
• KnpLabs / snappy
  PHP library allowing thumbnail, snapshot or PDF generation from a url or a html page. Wrapper for wkhtmltopdf/wkhtmltoimage
  ☆4,464Updated 5 months ago
• tecnickcom / TCPDF
  Official clone of PHP library to generate PDF documents and barcodes
  ☆4,455Updated 5 months ago
• maxmind / GeoIP2-php
  PHP API for GeoIP2 webservice client and database reader
  ☆2,449Updated last week
• twigphp / Twig
  Twig, the flexible, fast, and secure template language for PHP
  ☆8,323Updated 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…
  ☆10,663Updated 6 months ago
• thephpleague / oauth2-client
  Easy integration with OAuth 2.0 service providers.
  ☆3,750Updated last month
• stripe / stripe-php
  PHP library for the Stripe API.
  ☆3,945Updated this week
• Seldaek / monolog
  Sends your logs to files, sockets, inboxes, databases and various web services
  ☆21,347Updated last week
• 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
  ☆3,202Updated 3 years ago
• dompdf / dompdf
  HTML to PDF converter for PHP
  ☆10,978Updated this week
• cocur / slugify
  Converts a string to a slug. Includes integrations for Symfony, Silex, Laravel, Zend Framework 2, Twig, Nette and Latte.
  ☆2,905Updated 3 weeks ago
• paypal / PayPal-PHP-SDK
  Deprecated in favor of:
  ☆39Updated 2 months ago
• mpdf / mpdf
  PHP library generating PDF files from UTF-8 encoded HTML
  ☆4,600Updated last week
• phpseclib / phpseclib
  PHP Secure Communications Library
  ☆5,522Updated last week
• ezyang / htmlpurifier
  Standards compliant HTML filter written in PHP
  ☆3,279Updated 3 weeks ago
• thephpleague / flysystem
  Abstraction for local and remote filesystems
  ☆13,516Updated 2 weeks ago
• phpDocumentor / phpDocumentor
  Documentation Generator for PHP
  ☆4,289Updated this week
• defuse / php-encryption
  Simple Encryption in PHP.
  ☆3,856Updated last year
• thephpleague / csv
  CSV data manipulation made easy in PHP
  ☆3,444Updated 2 weeks ago
• mailgun / mailgun-php
  Mailgun's Official SDK for PHP
  ☆1,132Updated 7 months ago
• predis / predis
  A flexible and feature-complete Redis/Valkey client for PHP.
  ☆7,731Updated last week
• thephpleague / oauth2-server
  A spec compliant, secure by default PHP OAuth 2.0 Server
  ☆6,629Updated last month
• Setasign / FPDF
  FPDF is a PHP class which allows to generate PDF files with pure PHP. F from FPDF stands for Free: you may use it for any kind of usage a…
  ☆755Updated last year
• ramsey / uuid
  A PHP library for generating universally unique identifiers (UUIDs).
  ☆12,589Updated 3 weeks ago
• php-webdriver / php-webdriver
  PHP client for Selenium/WebDriver protocol. Previously facebook/php-webdriver
  ☆5,206Updated last week
• googleapis / google-api-php-client-services
  ☆1,272Updated this week
• Setasign / FPDI
  FPDI is a collection of PHP classes facilitating developers to read pages from existing PDF documents and use them as templates in FPDF.
  ☆1,206Updated last month