Google's Firebase is an entire app development platform that's packed with features.It comes with storage, cloud functions, monitoring and, of course, user authentication. The free tier comes with 50,000 MAUs. Beyond that pricing start at $0.0055/MAU and goes down to as low as $0.0025/MAU as you scale to millions of users. Firebase authentication supports email and password auth, phone auth, magic links, two-factor authentication and social identity providers - mainly Google, Google Play Games, Facebook, Apple, Microsoft, Twitter, GitHub and OAuth access tokens.

Auth0 is an identity and access management (IAM) platform designed to simplify authentication and authorization for applications. It provides a flexible solution that allows developers to implement secure login systems without having to build them from the ground up. Auth0 supports various authentication methods, including username-password credentials, social logins (like Google, Facebook, and GitHub), enterprise identity providers (such as Active Directory and SAML-based systems), and passwordless options. The platform is highly adaptable, offering over 30 software development kits (SDKs) that cater to a wide range of languages and frameworks—JavaScript, Python, .NET, iOS, Android, and more. This makes integration straightforward regardless of the tech stack. Beyond basic authentication, Auth0 offers advanced features like multi-factor authentication (MFA), single sign-on (SSO), and fine-grained authorization. These tools enable organizations to enforce complex access control policies, supporting both role-based (RBAC) and attribute-based (ABAC) models. Auth0 also addresses enterprise needs through features like user provisioning, directory synchronization, and support for B2B, B2C, and B2E use cases. It’s designed with scalability in mind, making it suitable for both startups and large enterprises. The platform’s extensibility allows developers to customize authentication flows, implement rules for conditional access, and integrate third-party services. Since its acquisition by Okta, Auth0 operates as a product unit under the Okta umbrella, complementing Okta’s broader suite of identity solutions while maintaining a developer-first focus. This combination brings together Okta’s enterprise-grade security with Auth0’s developer-centric approach, offering a comprehensive solution for modern identity challenges.

Clerk is a comprehensive user management and authentication platform designed to streamline how developers handle user accounts within web and mobile applications. It offers a suite of embeddable UI components—such as <SignIn/>, <SignUp/>, <UserButton/>, and <UserProfile/>—that integrate seamlessly into your application without redirecting users off-site. These components are fully customizable to match your brand, making the user experience cohesive and frictionless. Under the hood, Clerk provides a robust API and SDKs compatible with modern frameworks like Next.js, Remix, React, and Expo. It handles the entire authentication lifecycle, supporting multifactor authentication (MFA), session management, passwordless sign-in (via magic links or one-time passcodes), and traditional password-based methods with breach detection. The platform also integrates social sign-on (SSO) with over 20 providers, enabling quick user onboarding while adhering to security best practices. Clerk’s security posture includes SOC 2 Type 2 certification and CCPA compliance, with continuous third-party audits and penetration testing. Fraud prevention measures, like disposable email blocking and bot detection powered by machine learning, are built-in to reduce spam and abusive sign-ups. For B2B SaaS applications, Clerk provides advanced multi-tenancy features, enabling organization-based user management with custom roles, permissions, auto-join functionality based on email domains, and invitation systems—all accessible through both code and an admin dashboard. Developers benefit from rapid integration, significantly reducing the time spent on building authentication systems from scratch. Clerk acts as the single source of truth for user data and integrates seamlessly with popular backend services like Supabase, Firebase, and Convex. With free access for up to 10,000 monthly active users, it’s positioned as a scalable solution that grows with your application’s needs.

Supabase is the open-source alternative to Firebase. Like Firebase, it's a complete app development platform with user authentication, cloud functions, APIs, Postgres database, storage, vector embeddings, and other features. Supabase projects come with PostgreSQL's policy engine for fine-grained user access rules. It has social login integrations with Google, Facebook, GitHub, Azure (Microsoft), Gitlab, Twitter, Discord, and many more. They offer a customizable authentication component for React. Phone login and MFA can be added through third-party SMS providers such as Twilio or Bird. The free tier comes with 50,000 monthly active users. The Pro plan, at $25/month, comes with 100,000 MAUs and $0.00325/MAU beyond that.

Stytch provides a suite of tools designed to simplify authentication, authorization, and security for web and mobile applications. If you're developing an app and need a way for users to log in—whether with passwords, passkeys, or entirely passwordless methods—Stytch offers APIs and SDKs that handle these complexities. Their focus is on making authentication seamless for both developers and end-users while ensuring high security standards. For businesses, particularly B2B SaaS companies, Stytch enables advanced features like multi-tenancy, role-based access control (RBAC), and single sign-on (SSO). They provide an embeddable admin portal, allowing enterprise customers to manage their own authentication configurations, organizational settings, and integrations with identity providers—without constant developer involvement. Stytch places a strong emphasis on scalability and flexibility. Their tools are designed to “just work” across a range of use cases, from simple consumer apps to complex enterprise platforms. Developers can choose how much of the authentication flow they want to control—using pre-built UI components for quick implementation or leveraging headless SDKs and backend APIs for a fully customized experience. Security and fraud prevention are also core to Stytch’s offering. They provide real-time bot detection, device-aware multi-factor authentication, and intelligent rate limiting to protect against credential stuffing and other forms of account abuse. Their infrastructure ensures that login codes and authentication requests are delivered reliably, even when SMS or email providers fail. Stytch supports a broad range of programming languages and frameworks, including Python, Node.js, Java, React, and iOS, making integration into existing tech stacks straightforward. Their platform is designed for developers who want to build secure, user-friendly authentication systems without reinventing the wheel.

Appwrite is an open-source platform for building scalable applications. It comes with authentication, databases, storage, and functions. It's basically a complete development platform. They have an extremely generous free plan with 75,000 MAUs free of charge and their Pro plan is only $15/month. Appwrite offers email and password login, phone auth, magic links, email OTP, anonymous login, JWT login, SSR login, custom tokens, and two-factor authentication.

GoPasswordless is an authentication service and SDK that focuses on enabling passwordless authentication flows in web apps.

EasyVideo: AI-Powered Video Editing Tools EasyVideo is an AI-driven platform that helps you: -Remove video backgrounds effortlessly for professional content. -Erase watermarks while maintaining high video quality. -Enhance video quality with advanced AI upscaling. With lightning-fast processing, user-friendly design, and secure content handling, EasyVideo is trusted by 200+ creators to transform videos in seconds. Perfect for professionals and beginners alike!

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Pixvify is the top free realistic AI photo generator platform, helping create images, do face swaps, etc. Core Features of Pixvify: 1. AI Photo Generation: Create high-quality, realistic images instantly. Create unique images with advanced AI technology. 2. Face Swapping: Seamlessly swap faces in photos with precision. 3. Image Editing: Powerful tools for enhancing images, including cropping, color adjustments, and adding effects. User cases: Pixvify is built on advanced AI algorithms and powerful computing capabilities to easily and consistently generate high-quality, realistic art. Combined with other free AI tools, it takes your workflow to the next level. 1. Social Media Content: Enhance your posts with unique AI-generated images and fun face swaps. 2. Creative Projects: Save time on image creation for digital art, design, and marketing campaigns.

AISaver is an AI-powered platform offering a range of tools for video and image processing. It integrates features such as video face swap, image face swap, image enhance, video enhance, and text-to-speech conversion. Key Features of AISaver: 1. Video downloader online tool, easily download any video from any platform. 2. Face swap tool, easily swap faces in videos by using our AI Face Swap with a few clicks. Upload videos, then upload photos and then generate an interesting face swap video. 3. All in one video downloading and enhancing software, enhance your videos with powerful AI tools. AISaver is a free online face-swapping tool offering one-click video swaps with realistic effects. Enjoy safe, privacy-protected processing as the AI seamlessly integrates your chosen face into any video for an authentic result without storing personal data. With AI-driven technology, it delivers realistic results and is easy to use, making it an essential site for media processing.

VideoFaceSwap is a cutting-edge tool that leverages advanced technology to enable seamless face-swapping in videos and images, making creative multimedia processing easy and accessible. Key Features - Face swap: High-quality face-swapping for videos and images, including multi-face and batch processing. - Image tools collection: Additional tools like video enhancement, noise reduction, image enhancement, and background removal for comprehensive multimedia editing. Benefits 1. Simplified Editing: Offers an easy-to-use solution for precise, realistic face-swapping without requiring advanced editing skills. 2. Comprehensive Tools: Combines multiple multimedia processing features into one platform, saving time and effort for users. Use Case 1. Content Creation: Enhance social media videos with creative face-swapping effects to boost engagement. 2. Entertainment and Production: Create customized videos for role-playing, movie edits, or promotional campaigns.

WADesk is a professional client solution that enables simultaneous logins for multiple WhatsApp accounts, empowering users to seamlessly manage tasks like bulk messaging, number verification, automated conversations, auto-replies, and quick responses. It also facilitates chat message transfer, real-time local backups, rapid export of group members, and monitoring of group messages. Designed for corporate collaboration, WADesk allows employees to share corporate contact details efficiently, enhancing teamwork and productivity across the organization.

Flux AI is an open-source image generation tool, offering precision, complexity, and realism with various model options for diverse creative needs.

AI Image Generator: Create Stunning Visuals for Free, No Sign-Up Required! Welcome to the AI Image Generator, where your creativity can flourish without barriers! Our platform allows you to generate beautiful, high-quality images from text descriptions using multiple advanced AI models—all for free and without the need to sign up!

Discover the ultimate face-swapping experience with BeArt AI's Face Swap tool! Effortlessly swap faces in photos and videos with stunning accuracy and realism. Powered by advanced AI technology, our tool ensures seamless blending, preserving natural details for a professional-quality output. Perfect for creating fun edits, professional visuals, or personalized content. Try it now and unleash your creativity!

PicNow is the fastest ai image generator on the planet. You can create up to 4 images simultaneously in 1 second. That’s about 20x faster than OpenAI’s image tools—and the quality is still amazing. It even handles text in images really well, which is often a pain point with other generators. Why does speed matter? When image generation is instant, a new creative process emerges— say vibe imaging ;). No more waiting 20 seconds; you can generate, see results, and iterate in real-time, staying in the creative flow. You can use this tool as a first step for more advanced image processing, or sometimes the results are already perfect as they are. Instant images, infinite ideas.