Top 20 NuGet captcha Packages

Games library to distinguish human from machine input. (Library .NET Core)
Games library to distinguish human from machine input. (Library .NET Framework)
Package Description
Easy to use Audio Captcha for regular Asp.Net Mvc (.net framework)
This is a wrapper for CapMonster Cloud API and provides methods to create a task and get the result of the task.
Libreria de generación de captchas Ophelia Suite
Simple ariphmetic captcha for ASP.NET MVC 3
CaptchaMvc will implement your web MVC applications easier and more reliable protection. Features: You can easily change or extend the current implementation of the captcha. By default there are two types of captcha, plain and mathematical. Supports MVC 3, MVC 4, MVC 5. Supports for storing captcha...
CAPTCHA
.NET SDK for sweetCaptcha API
YinXiangMa Captcha, Ad driven Chinese Captcha
The project adds Google reCAPTCHA Version 2.0 support to ASP.NET Web Forms, ASP.NET MVC and ASP.NET Web Pages (Razor) applications.
SmoothCaptcha can be easily integrated into your any project such as ASP.NET, MVC, Winform. It was composed of C# language. Using a simple configuration class (CaptchaConfiguration) can generate your Captcha you need. And also, you can freely set include: captcha font, color, background color, size ...
Captcha Recognition for DE UI based on Nerual Nets
MVC compliant captcha generation library;fixed some bugs. and modified layout.
MultiCaptchaSolver is a nuget package for using a captcha solver in you .Net Application.It's now really simple to use Antigate and Other solver service in your apps.
.Net reCaptchaV2 Validator Wrapper