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CAPTCHA

by Alyssa Towns
Websites use CAPTCHA tests to distinguish between humans and robots. Understand the types of CAPTCHAs and critical considerations when using them.

What is CAPTCHA?

A captcha is a security measure used in online forms or websites to distinguish between human users and automated bots. It typically involves presenting users with a challenge, such as typing distorted characters or selecting images, to verify their identity. Captchas help prevent spam, fraud, and unauthorized access to online services by ensuring that only genuine users can proceed.

Related Glossary Terms

Alyssa Towns
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Alyssa Towns

Alyssa Towns works in communications and change management and is a freelance writer for G2. She mainly writes SaaS, productivity, and career-adjacent content. In her spare time, Alyssa is either enjoying a new restaurant with her husband, playing with her Bengal cats Yeti and Yowie, adventuring outdoors, or reading a book from her TBR list.

CAPTCHA Software

This list shows the top software that mention captcha most on G2.

WPForms is a user-friendly WordPress plugin designed to simplify the creation of various forms, including contact forms, payment forms, surveys, and more. Its intuitive drag-and-drop interface allows users to build professional, mobile-responsive forms without any coding knowledge. With a wide array of pre-built templates and advanced features, WPForms caters to both beginners and experienced developers, enhancing website interactivity and user engagement. Key Features and Functionality: - Drag & Drop Form Builder: Create custom forms effortlessly with a simple drag-and-drop interface. - Pre-Built Form Templates: Access a variety of templates to quickly set up forms for different purposes. - Responsive Design: Ensure forms look great and function seamlessly on all devices. - Smart Conditional Logic: Show or hide fields based on user input to create dynamic forms. - Multi-Page Forms: Break long forms into multiple pages to improve user experience. - File Uploads: Allow users to submit files through your forms. - Instant Notifications: Receive immediate email alerts upon form submissions. - Spam Protection: Utilize CAPTCHA and Honeypot methods to prevent spam entries. - Payment Integrations: Seamlessly integrate with payment gateways like PayPal and Stripe for online transactions. - Marketing Integrations: Connect with email marketing services such as Mailchimp, AWeber, and Constant Contact. Primary Value and Solutions: WPForms addresses the need for an efficient and accessible form-building solution within WordPress. By eliminating the requirement for coding skills, it empowers users to create customized forms that enhance user interaction and data collection. Its comprehensive features, including conditional logic and payment integrations, streamline processes like lead generation, customer feedback, and online payments. Ultimately, WPForms simplifies form creation, saving time and resources while improving website functionality and user engagement.

UiPath enables business users with no coding skills to design and run robotic process automation

Trusted by more than 35 million users worldwide, Jotform is a powerful online form builder designed to help individuals and organizations create, customize, and publish forms in minutes, from any device. With an intuitive drag-and-drop interface, Jotform makes it simple for anyone to build professional, mobile-responsive forms without writing a single line of code. As a fully no-code platform, Jotform empowers users to automate workflows, streamline data collection, and digitize processes. Jotform offers one of the largest template libraries in the industry, featuring 10,000+ ready-made form templates tailored to every use case. Popular categories include payment forms, lead generation forms, event registration forms, application forms, surveys, order forms, onboarding forms, consent forms, and feedback forms. Each template is fully customizable, allowing users to adjust layouts, add conditional logic, collect e-signatures, upload files, apply branding, and incorporate advanced field types. This level of flexibility ensures every form is optimized for user experience and aligned with organizational goals. To streamline workflows, Jotform integrates seamlessly with over 200 popular third-party apps, including Google Sheets, Slack, Zoom, HubSpot, Salesforce, PayPal, Stripe, and numerous other business tools. These integrations automate data collection, payment processing, CRM updates, and team notifications. By connecting forms directly to the tools your team already uses, Jotform helps eliminate data silos and supports end-to-end process automation—all within a no-code environment. Security and compliance are at the core of Jotform’s platform. Features such as HIPAA compliance options, 256-bit SSL encryption, CAPTCHA, form access controls, and audit logs help organizations protect sensitive data and meet industry standards. Whether you're collecting healthcare information, financial data, or internal employee records, Jotform provides the reliability and safeguards needed to operate with confidence. With powerful features like automated emails, approval workflows, analytics dashboards, and embeddable widgets, Jotform delivers an all-in-one solution for organizations looking to simplify data collection and improve productivity. From small businesses to enterprises, educational institutions, healthcare providers, and nonprofits, millions of teams rely on Jotform to capture information efficiently and turn submissions into actionable results.

Arkose Labs solve multimillion-dollar fraud problems for the world's most targeted businesses with zero friction to users.

Strengthen security. Stop fraud. Build trust. Humans, bots, and AI agents increasingly act on behalf of legitimate consumers and fraudsters alike. The challenge isn’t just blocking certain traffic types; it’s distinguishing between malicious and legitimate activity, regardless of the source, and responding appropriately in each case. HUMAN Sightline combines advanced detection, customizable mitigation, and investigative intelligence to provide that clarity. The solution protects users and accounts from fraud, abuse, and misuse by humans, bots, and AI agents — and seamlessly enables trusted interactions across the customer journey. By providing direct visibility into key business metrics, HUMAN Sightline allows you to understand and showcase the impact of anti-fraud measures on your bottom line, so you can optimize accordingly.

Real-Time Bot Protection The #1 bot protection solution for e-commerce and classified ads businesses - Deploys in minutes on any web infrastructure - Unmatched bot detection speed and accuracy - Dedicated threat research and SOC teams

A secure, web-based, end-user password reset management program

Automation Anywhere Enterprise is an RPA platform architected for the digital enterprise.

ActiveCampaign offers effortless email and marketing automation. Grow your business with AI-powered automations that suggest, personalize, and validate your marketing campaigns. With hundreds of automation triggers and actions, conditional routing, and an AI-powered drag-and-drop builder, you can create deeper automations than the competition, faster.

Netpeak Checker is a multifunctional research tool for bulk SEO analysis that helps you audit URLs by a wide range of parameters.

Selenium is Oxbotica's flagship autonomous control system, designed to transform various vehicles into self-driving entities without relying on GPS. This vehicle-agnostic software suite enables robust navigation and operation across diverse environments, including indoor, outdoor, and underground settings. By integrating advanced AI and machine learning algorithms, Selenium provides vehicles with situational awareness, allowing them to perceive surroundings, detect obstacles, and make informed decisions to complete tasks safely and efficiently. Key Features and Functionality: - Vehicle Agnostic: Compatible with a wide range of vehicles, from cars and self-driving pods to warehouse trucks and forklifts. - GPS Independence: Operates effectively without GPS, ensuring reliable performance in environments where GPS signals are weak or unavailable, such as urban canyons, forests, or underground facilities. - Advanced Perception: Utilizes a combination of sensors and proprietary algorithms to detect and predict the movement of vehicles, people, and other objects, even in complex scenes and varying weather conditions. - Precise Positioning: Achieves high-precision, robust, and reliable vehicle positioning, enabling safe navigation in challenging locations without the need for external infrastructure. - Smooth Vehicle Control: Ensures safe and optimal path planning and vehicle control, providing comfortable and reassuring passenger experiences. Primary Value and User Solutions: Selenium addresses the growing demand for autonomous vehicle solutions by offering a flexible, scalable, and efficient platform that can be deployed across various industries. Its ability to function without GPS and adapt to different vehicle types and environments makes it particularly valuable for applications in logistics, warehousing, and urban transportation. By enabling vehicles to operate autonomously in complex and dynamic settings, Selenium enhances operational efficiency, reduces costs, and improves safety for businesses and their customers.

Google Workspace enables teams of all sizes to connect, create and collaborate. It includes productivity and collaboration tools for all the ways that we work: Gmail for custom business email, Drive for cloud storage, Docs for word processing, Meet for video and voice conferencing, Chat for team messaging, Slides for presentation building, shared Calendars, and many more.

WordPress itself is a very secure platform. However, it helps to add some extra security and firewall to your site by using a security plugin that enforces a lot of good security practices. The All In One WordPress Security plugin will take your website security to a whole new level. This plugin is designed and written by experts and is easy to use and understand. It reduces security risk by checking for vulnerabilities, and by implementing and enforcing the latest recommended WordPress security practices and techniques.

Rocketbot is the most impressive RPA platform, it is the friendliest and does not require developer knowledge to use it. The practicality of running the robot breaks the barrier of fear of learning on this platform.

Selenium WebDriver is an open-source tool that automates web browser interactions, enabling developers and testers to simulate real user actions for web application testing. It supports multiple programming languages, including Java, Python, C#, Ruby, and JavaScript, allowing users to write test scripts in their preferred language. WebDriver interacts directly with browser drivers, facilitating cross-browser testing across platforms like Chrome, Firefox, Safari, Edge, and Internet Explorer. This direct communication ensures more stable and reliable tests by mimicking real user behavior without the need for a separate server installation. Key Features and Functionality: - Cross-Browser Compatibility: Enables testing across various browsers, ensuring consistent application behavior. - Multi-Language Support: Offers bindings for languages such as Java, Python, C#, Ruby, and JavaScript, providing flexibility for testers. - Direct Browser Control: Interacts with browsers through native drivers, leading to more accurate and stable tests. - Parallel Test Execution: Integrates with Selenium Grid to run tests concurrently on multiple machines, reducing execution time. - Open-Source and Community-Driven: Freely available with a robust community, ensuring continuous improvements and support. Primary Value and Problem Solved: Selenium WebDriver addresses the need for efficient, reliable, and scalable web application testing. By automating browser interactions, it reduces manual testing efforts, accelerates the testing process, and ensures applications function correctly across different browsers and platforms. Its support for multiple programming languages and integration capabilities make it a versatile choice for teams aiming to enhance their testing frameworks and deliver high-quality web applications.

Contact Form 7 is a widely-used WordPress plugin that enables users to create and manage multiple contact forms with ease. It offers a simple yet flexible interface, allowing for the customization of form fields and mail content through straightforward markup. The plugin supports various types of input fields, including text, email, telephone numbers, and text areas, catering to diverse form requirements. Additionally, Contact Form 7 integrates seamlessly with external APIs, such as reCAPTCHA for spam prevention and Akismet for filtering unwanted messages. Its compatibility with numerous WordPress themes and plugins ensures a cohesive user experience. By providing a reliable and customizable solution, Contact Form 7 addresses the need for efficient communication channels between website owners and their visitors. Key Features: - Multiple Form Management: Create and manage unlimited contact forms within a single WordPress installation. - Customizable Form Fields: Easily add and modify various input fields, including text, email, telephone, and text areas, to suit specific needs. - Integration with External APIs: Enhance functionality by integrating with services like reCAPTCHA for spam protection and Akismet for filtering unwanted messages. - Shortcode Support: Embed forms anywhere on your site using simple shortcodes, ensuring flexibility in form placement. - AJAX Submission: Enable smooth form submissions without page reloads, improving user experience. - Customization Options: Tailor mail content and form appearance to align with your website's design and communication style. Primary Value and User Solutions: Contact Form 7 provides a straightforward and adaptable solution for website owners seeking to establish effective communication channels with their audience. By offering customizable forms and seamless integration with anti-spam tools, it ensures that user interactions are both efficient and secure. The plugin's flexibility allows for the creation of forms that meet specific requirements, enhancing user engagement and satisfaction. Its widespread compatibility with various WordPress themes and plugins further ensures a cohesive and professional appearance across the website.

QuestionPro is a leading provider of online survey software that allows our users to generate the insights they need to make better business decisions. Our software includes not only tools for creation, distribution, and analysis of surveys, but also provides a platform for polling, tablet-based mobile research, and data visualization.

Gravity Forms is the Easiest Tool to Create Advanced Forms for Your WordPressPowered Website.