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.

Ory is an API-first identity manager. They offer authentication, analytics, access control, machine-to-machine authentication and more. They have SDKs for the major languages: - Dart - .NET - Elixir - Go - Java - JavaScript - PHP - Python - Ruby - Rust Unfortunately, they don't offer a free tier. Pricing starts at $29/month and includes 1,000 daily active users. Then it's $30 / 1,000 additional DAUs.

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.

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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.

To get simple ideas and useful tools that help you save time and grow faster. Whether you're working on a business, building a brand, or improving your projects, you’ll find practical tips and strategies to make your work easier and more effective. To get simple ideas and useful tools that help you save time and grow faster. Whether you're working on a business, building a brand, or improving your projects, you’ll find practical tips and strategies to make your work easier and more effective.

BlogFox is an AI-powered blogging tool that simplifies the creation of high-quality, SEO-optimized content.

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Decopy AI offers a comprehensive platform for detecting AI-generated content in both text and images, as well as verifying the origins of visuals. Key Features 1. AI Content Detector: Identifies whether text is written by AI or humans. 2. AI Image Detector: Detects AI-manipulated images. 3. Reverse Image Search: Finds the original source of an image across the web. Benefits - All of Decopy AI’s powerful detection tools are completely free to use. No subscriptions, no hidden fees—everyone can access and benefit from our AI Content Detector, AI Image Detector, and other tools at zero cost. - AI Detector tools are built on advanced algorithms that provide exceptional accuracy in identifying AI-generated content and images. Whether you’re analyzing text or visuals, Decopy AI delivers reliable results that you can trust. Use Case - Educators verify student submissions for AI-generated work. - Businesses check content authenticity for marketing. - Researchers trace image origins for verification. - Content creators prevent unauthorized use of their visuals.

Refinder is an AI-powered search and assistant solution designed to empower companies and professionals. By seamlessly connecting personal and company applications, Refinder provides a unified search interface that uncovers data you didn’t even know was there. Leveraging advanced AI and Retrieval-Augmented Generation (RAG) technology, Refinder searches across your organization and deep within your content to deliver critical knowledge precisely when your employees need it. Refinder includes pre-built integrations for essential tools like Confluence, Jira, Notion, Google Drive, and Gmail, making it easy to implement and ready to use right out of the box. With Refinder, you’ll quickly and accurately find the information you need, enabling your team to make better-informed decisions in strategic planning and customer interactions. How can Refinder help you? - Optimize HR operations with AI-powered insights, centralizing essential employee information, performance reviews, and onboarding materials in one platform. - Equip your sales and marketing teams with real-time insights into customer needs, fostering more impactful engagement and customer connections. - Enhance your customer service with AI-driven insights that help agents resolve issues faster with relevant, real-time solutions. - Streamline processes from troubleshooting to product development, reducing bottlenecks and enabling quicker, data-driven decision-making. Refinder offers flexible plans to fit teams of any size—from startups to large enterprises—allowing you to scale seamlessly as your needs grow. Transform your company’s data into powerful insights with Refinder—your AI search engine and assistant for the modern enterprise.

NowKnow helps you get market research done in hours instead of weeks. Ask questions, upload designs, and get thoughtful feedback from AI personas that represent your target audience. Key Features - Fast Results: Get detailed feedback within hours instead of waiting weeks for traditional surveys - Realistic Feedback: AI personas provide authentic responses based on real demographic profiles - Visual Testing: Upload images and designs to get feedback on everything from logos to interfaces - No Privacy Concerns: Since responses come from AI personas, there's no GDPR/CCPA compliance needed Benefits - Test More Ideas: Run multiple studies quickly and affordably - Iterate Freely: Adjust your questions and run new versions instantly - Target Precisely: Get feedback from specific demographic groups - Move Faster: Make informed decisions without long research delays Use Case Test everything from marketing messages to visual designs. Perfect for comparing UI layouts, A/B testing ads, getting feedback on logos, evaluating product mockups, and choosing the best social media content.

Instant credit system integration for Apps and Games with Creduse API. Simplify credit management for your application or game with our developer-friendly API solution. Enjoy quick integration, robust scalability, and comprehensive support, plus powerful analytics to monitor user activity.

Track, analyze, and explore TikTok, Insta Reels, and YouTube Shorts videos and accounts. Monitor your accounts across platforms and dive into viral content like never before. Access advanced data analysis and dashboards to keep track of your videos and identify outliers, creating a virality machine for your app or brand. Use AI to search through an extensive library of viral content. Search by context and hook to find the latest high-performing videos and get inspiration for your next short content. Discover similar viral videos to your own to enhance your content, and find accounts that mirror yours. Spy on and track your competition, uncover their viral content, and improve your own content strategy.

Solana Tracker is a platform for Traders and Solana Developers. Everything from buying memecoins to building your own web3 app on Solana. Quick Discovery: Find new memecoins fast on popular exchanges like Raydium, Pumpfun, Moonshot, and Orca. No more endless scrolling or missed opportunities. Safety First: Every token gets an automatic rugcheck. This helps you assess risks quickly and invest with more confidence. Easy Portfolio Management: Keep an eye on multiple wallets at once and see your daily profit and loss. It's like having a personal finance dashboard for your Solana investments. Developer Friendly: Building on Solana? Solana Tracker provides handy resources like Swap API, Data API, and Solana RPC nodes to make your life easier. Whether you're a casual investor or a serious developer, Solana Tracker simplifies your Solana token experience. It's designed to help you find, buy, and track tokens more efficiently. Give it a try and see how it can streamline your Solana journey.