🔗Best Link-Building Services

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KentekenGids is a premier Dutch online platform for comprehensive vehicle information. This user-friendly website offers a range of services centered around vehicle data: - Extensive Database: Users can access detailed information on more than 15 million vehicles registered in the Netherlands by simply entering a license plate number. - Multi-Source Reports: The platform aggregates data from authoritative sources including the RDW (Dutch Road Transport Agency), NAP (National Auto Pass), and APK (Dutch MOT equivalent) to provide thorough vehicle histories. - Security Checks: Visitors can quickly verify if a vehicle has been reported stolen, enhancing security for potential buyers. - Odometer Fraud Prevention: The site allows users to review a vehicle's recorded mileage history, helping to identify potential discrepancies. - Insurance Insights: KentekenGids provides valuable information about a vehicle's insurance status and history. By offering both complimentary and premium license plate checks, KentekenGids empowers consumers and businesses to make well-informed decisions in various automotive transactions, from purchases and sales to insurance considerations. The platform's ultimate goal is to increase transparency in the Dutch automotive market.

Google Search Console lets you see your site's Google traffic and to help Google index your pages. You can view the number of search impressions, search clicks, keywords used, track links to your pages, check core web vitals, crawl stats etc. You can also manually request crawling of certain pages and upload site maps.

With SEO Stuff's free keyword generator you get up to 20 keyword suggestions for every keyword you enter for free. For each keyword, you can find out how difficult it is to rank and what the average search volume is. It supports multiple keyword languages.

Ahrefs has a generous free tier that allows you to view your domain ranking, track backlinks, view organic keywords, analyze page and backlink health, check out competitors and many more. Once you sign up and connect your domain, you'll get weekly reports on your SEO progress.

AnswerThePublic is a great tool for generating content ideas. Enter the keyword and it will help you discover all the major Google searches that contain that keyword. For example, type in "ranking" and you can get suggestions for "ranking of taylor swift songs", "ranking list", "ranking of us presidents", "ranking fallout games", "ranking nfl stadiums", "ranking true detective seasons" and many, many more. AnswerThePublic has a free tier with three free searches per day.

Luthor is an AI-powered platform designed for startups, SaaS companies, and professional services to enhance their SEO and content marketing efforts. The platform automates the creation of large-scale, SEO-optimized content, focusing on long-tail keywords to drive exponential organic traffic growth. Luthor’s key features include programmatic SEO, AI-driven competitor analysis, automated content and code optimization, and scalable content generation. It offers cost and time efficiency by simplifying complex SEO tasks into one-click actions, continuously optimizing content to stay ahead of search algorithm changes and competitors, and enabling businesses to scale their online presence and drive growth without heavy investment in manual efforts.

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.

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.

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.

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.

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

With SEO Stuff's free keyword generator you get up to 20 keyword suggestions for every keyword you enter for free. For each keyword, you can find out how difficult it is to rank and what the average search volume is. It supports multiple keyword languages.

BigSpy possesses a massive database that undergoes millions of data updates every day. Moreover, BigSpy's database covers some of the most crucial platforms highly regarded by advertising practitioners, such as TikTok, Facebook, and Admob. With its abundant filtering options, you can effortlessly find the advertising materials that best meet your needs and gain inspiration. The homepage analysis function enables real-time monitoring of competitors. In addition, BigSpy offers features like selected advertisements and creative rankings, further helping you pick out the most valuable advertising creativity and greatly enhancing your efficiency in finding advertising inspiration.

Discover the right SEO stack for your project by exploring our curated list of tools. From AI-driven optimizers to widely-used research platforms, we've got everything to help you succeed in the competitive digital landscape.

Lunroo is an AI-powered platform designed to simplify and enhance social media marketing. It offers a robust suite of over 45 tools tailored for popular social media platforms, including LinkedIn, TikTok, YouTube, and Instagram. These tools are aimed at helping users grow their social media presence, engage with their audience, and drive more traffic to their content.

KarmaLinks is an AI powered backlink exchange platform. Users are able receive backlinks from others and must give backlinks in exchange. Matchings are done by AI and guarantee the best quality and relevance. Key Features Backlink exchange: give backlinks, receive karma points by the amount of your Domain Rating; Receive backlink, points are reduced by the amount of the website's Domain Rating that gave you the backlink. Backlink monitoring: Automatically monitors that the backlinks you received are still available to keep your DR high. Benefits - SEO: grow your domain authority, rank better - Free: you have nothing to pay to join and use the platform. - Privacy: our community is not a database. The algorithm finds you the relevant backlinks to give/receive once a week. - Efficient process: remember the time where you did endless outbound to gather poor quality backlinks? This is now history. - Quality: our algorithm uses AI to find you the best match for each backlink it suggests. - Non penalising: The domains and the identity of domain owners are strongly verified (Using AI and human manual validation). We don't let scam websites or link farms join the platform. Use Case For marketing teams and SaaS founders: use our platform to rank your website higher thanks to our free backlink exchange platform. For SEO pros (consultants and agencies): use our platform to scale the link building strategy of your clients.

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.

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.

Amazon Cognito is an identity platform for web and mobile apps. It’s a user directory, an authentication server, and an authorization service for OAuth 2.0 access tokens and AWS credentials. With Amazon Cognito, you can authenticate and authorize users from the built-in user directory, from your enterprise directory, and from consumer identity providers like Google and Facebook.

AppMole is an all-in-one platform featuring a wide range of AI-driven tools and resources tailored for creators, influencers, and developers. It offers various web apps, marketing tools, and design apps, all aimed at streamlining workflows and enhancing productivity. Users can stay updated with the latest AI applications, reviews, and trending software.

IG follower export tool helps users export Instagram users with just one click, it is available online and requires no login or Instagram account, ensuring there are no risks of bans or restrictions. Simply enter the Instagram profile URL to instantly download detailed information such as email, phone, bio, and category directly. This tool streamlines the process of gathering follower data without compromising account security or privacy. Efficient and user-friendly, the tool is designed to provide quick access to essential contact information, making it ideal for marketers, researchers, and social media managers who need to analyze or reach out to Instagram audiences without unnecessary delays. With just a few clicks, you can obtain comprehensive data from any public Instagram profile, significantly cutting down the time usually spent on manual data collection. This capability makes it an invaluable resource for professionals looking to enhance their social media strategies and engagement efficiently.

SaaSCurate is a community-driven platform where SaaS founders launch and grow their products. Key Features - List Your Product: Feature it on the platform to get in front of an active community of SaaS enthusiasts. - Newsletter Spotlight: Get your product highlighted in our weekly newsletter, reaching all community members. - Community Notifications: Launching on Product Hunt? Announce it to the whole community! - Social Proof: Earn badges and endorsements to build credibility and attract more users. - SEO Boost: Secure a valuable dofollow backlink to strengthen your SEO. Benefits - Maximize Visibility: Build buzz and get new people using your product. - Increase Credibility: Attract customers and gain credibility with endorsements and badges. - SEO Boost: Secure dofollow backlinks that improve your search rankings and drive organic traffic to your site. - Community Engagement: Launch announcements and newsletter features keep your product top-of-mind as you grow. Use Case - First-Time Launching: Kickstart your product’s journey with instant visibility and social proof from a community eager to discover new tools. - Growing an Existing Product: Boost ongoing engagement by featuring updates in newsletters and gaining SEO-friendly backlinks to attract fresh users. - Launching on Other Platforms: Amplify your reach by notifying the SaaS community about launches on Product Hunt or AppSumo, driving more traffic and engagement.

Adligator is more than just an ad aggregator; it’s a sophisticated AI tool designed to give businesses, marketers and affiliate marketologists a strategic advantage in the highly competitive world of online advertising. By aggregating ads from major platforms like Facebook, Instagram, Facebook Messenger, and the Audience Network, Adligator enables users to dissect and understand their competitors' marketing strategies. This service provides a granular view into ad placements, formats, audience targeting, and performance metrics, empowering businesses to craft data-driven advertising strategies that drive results.

All-in-one marketing tool equipped with artificial intelligence, democratizes advanced marketing techniques by making them accessible and easy to apply.

The biggest advantage of Cognito is that it's a part of the AWS ecosystem and integrates well with other AWS services. The free tier comes with 50,000 MAUs and the price for each additional MAU starts at $0.0055/month and goes down to as low as $0.0025/month as you scale to tens of millions of users. It integrated with four federated identity providers - your users can sign up with Facebook, Google, Apple and Amazon.

Owlbot offers a cutting-edge AI-powered chatbot service that seamlessly integrates with your data to provide instant responses for you, your customers, or your team. Deploying a tailor-made AI chatbot with Owlbot is straightforward, enhancing both customer service and the efficiency of data analysis with minimal effort. Our AI chatbot is capable of handling 90% of inquiries from customers, clients, or employees effortlessly (>90 languages supported). It can import data from a variety of sources, including documents, markdown files, and webpages, ensuring that you receive precise, immediate answers. Additionally, you can connect the chatbot to your internal tools to access private data in real-time and provide timely responses. You can choose from 12 different large language models (LLMs), such as Mistral, OpenAI, and Anthropic, to find the option that best fits your needs. Owlbot also captures the details of interested visitors, helping you compile a list of potential leads and expand your business opportunities.

My personal favorite! Specializes in cruise bookings and offers a price guarantee. Features deals, discounts, and last-minute offers.

Medidex Connect is your personal 24/7 online pharmacist chat service. Get quick and convenient answers to your general health and medication questions from a qualified source.

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

Looking to implement structured data and don't know where to start? Google has excellent docs that explain what kind of structured data you need to provide to get certain types of search results. Bredcrumbs, articles, carousels, courses, reviews, FAQs, products, recipes and more - it's all covered there!

Google Search Console lets you see your site's Google traffic and to help Google index your pages. You can view the number of search impressions, search clicks, keywords used, track links to your pages, check core web vitals, crawl stats etc. You can also manually request crawling of certain pages and upload site maps.

With SEO Stuff's free keyword generator you get up to 20 keyword suggestions for every keyword you enter for free. For each keyword, you can find out how difficult it is to rank and what the average search volume is. It supports multiple keyword languages.

Got your structured data and JSON-LD in place? Great, now go test it. Google has a free tool to help you view your search results as they see it - and spot potential errors or areas for improvement.

Ahrefs has a generous free tier that allows you to view your domain ranking, track backlinks, view organic keywords, analyze page and backlink health, check out competitors and many more. Once you sign up and connect your domain, you'll get weekly reports on your SEO progress.

Uneed is a platform where people can both discover new products and promote their own. It works a bit like Product Hunt, giving creators a way to get their products noticed. Every day at midnight PST, between 10 and 20 new products launch on the homepage. On launch day, products get prime visibility, but users can keep voting for them anytime afterward. Products are ranked daily, weekly, monthly, and yearly. The top three products in each ranking get badges—gold, silver, or bronze—displayed on their product pages. Popular products also get featured in Uneed’s weekly newsletter, which reaches over 9,100 subscribers. If you want to launch a product, you make an account and fill out the details. There are two ways to get your product live: wait in a free queue (and get assigned a random launch date) or pay $30 to skip the line and pick your date. Success comes from a strong launch day, keeping your page up-to-date, and encouraging people to vote. Adding special deals can also earn you a badge and keep interest alive. The community side of Uneed is built around upvoting products. The more you vote, the more power you gain. For example, a 5-day voting streak doubles your vote’s power, and a 100-day streak triples it while unlocking an avatar border. At 150 days, you get a free line skip; at 500 days, you get discounts on advertising; and at 1,000 days, your votes count as five. The platform covers categories like development, design, marketing, business, and personal life products. It’s just one person running Uneed, and you’re encouraged to vote for your own product. If you have questions, they’re easy to reach via email. In short, Uneed is a straightforward way to launch a product, gather feedback, and build an audience—without needing a massive following upfront.

10words will publish your startup on their website, Twitter / X, and their newsletter. The catch? You have to explain it in 10 words or less. It's free to submit your startup.

Rank Anything is your ultimate top picks guide in any category in the world. Discover top rated books, foods, countries, products, films, music, habits, workout routines, websites and anything in between. If you can think it, you can rank it.

Indie Hackers Stacks is a directory of indie products with their software stacks. You can use it to discover the tools that other makers use to build their products. Publish your own stack and get free exposure and some SEO juice.

Sell your unused domains effortlessly. Skip the hassle of transfers and intermediaries.

This was my go-to page at the early stages of learning Mandarin. Chinese Grammar Wiki has an articles of each of the main aspects of Chinese grammar. For example, there are articles on how to use 一下, 在, 要, 就是, 才and many other Mandarin grammar points. Each word gets its own article with examples in pinyin and characters and, of course, English translations. You can also get website as a physical book or an ebook.

The Australian Citizenship Tests app is a tool that helps you get ready for the Australian citizenship test. It’s made to be simple and easy to use, giving you practice questions, full-length tests, and helpful study materials. The questions are based on official resources, so you’ll get a good idea of what the real test is like. You can use the app on your phone or laptop, and there’s no limit to how many practice tests you can take. The app tracks your progress, so you’ll know which topics you need to work on. There’s also a demo with audio explanations if you prefer listening while studying. The app was created by Jogi, an independent developer who originally built it to help his wife prepare for her test. He noticed there weren’t many good resources available, so he decided to make one that’s clear, useful, and easy for anyone to use. Many people have found the app helpful. Users from different countries—like Sweden, Iran, Vietnam, Brazil, and Pakistan—say it made studying less stressful and boosted their confidence. Over 3,000 people are currently using it, and the platform has recorded thousands of answered questions and practice tests taken. There’s a 7-day free trial, and if you’re not happy with it, there’s a money-back guarantee. To qualify for that, you’ll need to complete all the practice tests in the app. The prices are in US dollars, and your personal information is kept secure. If you want, you can also check out their blog for study tips, test-day advice, and information about Australian history and culture.