The best affiliate programs like Add to Sheets in 2025

InvoicingAPI is a versatile and developer-friendly invoicing platform designed to make creating, customizing, and managing invoices seamless for businesses of all sizes. With support for global tax regulations, a robust library of customizable templates, and the ability to generate beautifully formatted PDF invoices via a simple API call, InvoicingAPI streamlines the entire invoicing process. Users can invoice clients in any currency, integrate payment links for faster transactions, and manage payments, refunds, and payouts from an intuitive dashboard—all while enjoying a generous free tier and no fees on payments. The platform is platform-independent, supports unlimited app integrations with a single API key, and offers built-in safeguards to prevent accidental request overloads.

InvoicingAPI is a perfect solution for SaaS providers, e-commerce businesses, marketplaces, consultants, POS systems, and CRM developers looking to add dynamic, tax-compliant invoicing without heavy development overhead. Its ease of integration, high degree of customization, and focus on security and scalability make it an excellent choice for affiliates to promote, appealing to a broad audience of businesses seeking efficient and reliable invoicing solutions.

Intellecs.ai is an AI-powered study platform and note-taking app designed to streamline and enhance the learning experience for students. Combining note-taking, AI chat, flashcard creation, and deep research tools into a single intuitive platform, Intellecs.ai enables users to organize and restructure their notes effortlessly, create and study flashcards, perform advanced research, and leverage AI to clarify and expand their study materials. Its markdown-based formatting, drag-and-drop functionality, and keyboard shortcuts keep the workflow seamless and distraction-free, while AI-powered features help users build comprehensive, well-structured notes and generate flashcards automatically.

Ideal for students, lifelong learners, and anyone looking to consolidate their learning tools, Intellecs.ai eliminates the need for juggling multiple apps or subscriptions. With its focus on active recall, spaced repetition, and consistent study habits, it supports learners in retaining information effectively and preparing thoroughly for exams. Affiliates will find Intellecs.ai an appealing choice to promote due to its innovative all-in-one approach, strong value proposition, and appeal to ambitious students seeking smarter, more efficient study solutions.

Inlinkify is an AI-powered platform designed to help website owners and SEO professionals maximize their search engine rankings by optimizing internal linking structures. By scanning all pages of a website, Inlinkify intelligently identifies missing internal links and suggests relevant linking opportunities between existing content. This process not only ensures that search engines can better understand the structure and relationships within a website but also helps distribute link equity more effectively, making important pages more visible in search results.

This tool is particularly valuable for businesses, content creators, agencies, and anyone investing in content who wants to increase their site's discoverability and user engagement. Affiliates will find Inlinkify appealing to promote because it addresses a critical aspect of SEO that is often overlooked, helping clients protect and enhance the value of their content investments while delivering measurable improvements in rankings and user retention.

Infography is an AI-powered platform that transforms blog posts and complex content into visually compelling, shareable infographics in just seconds. By leveraging advanced language models and intuitive design tools, Infography eliminates the traditional hassle of research, design planning, and manual graphic creation, delivering professional-quality visuals at a fraction of the time and cost. Users can input a blog link, topic, or content prompt, and the platform automatically generates eye-catching infographics with customizable branding options, support for over 100 languages, and seamless API integration for content platforms and marketing tools.

Ideal for content creators, marketers, bloggers, educators, and agencies looking to boost engagement, simplify information, and increase the shareability of their content, Infography stands out as a powerful solution for repurposing and amplifying existing material. Affiliates will find this tool particularly appealing to promote thanks to its broad use cases, cost-effectiveness, and strong appeal to a rapidly growing creator economy eager for time-saving and results-driven content solutions.

Immoklar is a user-friendly real estate analysis tool designed for property investors in the DACH region, making it easy to evaluate the profitability and cash flow of any residential investment. In just a few minutes, users can input key figures such as purchase price, rental income, and operating costs, and receive precise calculations on returns, cash flow, and value development. The platform streamlines complex financial planning by offering automated analyses, financing simulations, and customizable checklists for property viewings. Immoklar also enables users to generate professional PDF exports for bank meetings, eliminating the need for error-prone spreadsheets and manual calculations.

This solution is ideal for new and experienced property investors, home buyers, and anyone looking to make confident, data-driven decisions in real estate. Its intuitive interface and comprehensive features remove barriers for those without financial or Excel expertise, while the web-based platform ensures flexibility and accessibility on any device. Affiliates will find Immoklar an appealing program to promote, as it addresses widespread pain points in property investment and empowers users to make smarter, more profitable decisions with minimal effort.

Imagifly is a user-friendly platform designed to simplify the process of generating AI images by offering customizable prompt libraries. Users can easily create, save, and organize their favorite prompts, making it effortless to produce stunning visuals using popular generative AI tools like Midjourney, Dall-E, or Photoshop. By streamlining prompt management, Imagifly helps both beginners and advanced users get consistent, high-quality results from their preferred AI image generators.

Imagifly is ideal for digital artists, content creators, marketers, and anyone leveraging AI-powered image generation in their workflow. Affiliates will find Imagifly appealing to promote due to its practical utility, broad compatibility, and time-saving features, making it a valuable tool for anyone seeking to enhance their creative process with AI technology.

Imagetopromptai is an AI-powered tool that instantly converts images into detailed text prompts, specifically tailored for use with platforms like Stable Diffusion. Users can simply upload an image and receive a ready-to-use textual description that enables them to reproduce similar artworks or variations through AI image generation tools. The platform is designed for convenience, offering a straightforward pay-as-you-go pricing structure with no required subscriptions, making it accessible for both occasional and frequent users.

This service is ideal for digital artists, designers, and creators looking to streamline their workflow when working with AI art generators. Affiliates can confidently promote Imagetopromptai to audiences interested in creative technology, as it addresses the growing demand for efficient and accurate image-to-text prompt solutions, making it a valuable resource for anyone seeking to enhance their creative projects with AI-generated art.

HiveOtter is a referral marketing platform designed to help businesses transform their happy customers into active brand advocates. With an emphasis on automation, HiveOtter enables users to create, manage, and scale referral programs that distribute discount coupons and rewards through unique referral links. The platform features automated discount code generation, double-sided rewards to incentivize both referrers and new customers, seamless integrations with popular tools like WooCommerce, Lemonsqueezy, and Stripe, and extensive customization options to ensure brand consistency. HiveOtter also simplifies communication with customizable emails, making it easy to keep both referrers and invitees engaged throughout the referral process.

HiveOtter is an ideal solution for e-commerce businesses, startups, and online merchants looking for a cost-effective way to acquire high-quality customers through trust-based recommendations. Affiliates will find HiveOtter appealing to promote because it offers a practical, easy-to-implement system that drives organic growth, reduces customer acquisition costs, and provides flexible pricing plans to suit various business needs. This makes it a valuable tool for any business seeking to boost sales and loyalty by leveraging the power of word-of-mouth marketing.

HomeVisualizer.AI is an advanced AI-powered platform designed to revolutionize the way users visualize and plan interior spaces. Built with input from expert interior designers, the tool transforms 2D elevation drawings, photos, low-fidelity renders, and rough sketches into stunning, photorealistic images. HomeVisualizer.AI offers a range of intelligent design modes, such as Style Fusion for blending inspiration images with your space, Custom Requests for tailored transformations, and Auto Style for effortless, trend-driven makeovers. Its intuitive workflows streamline ideation, enhance presentations, and help users preview design concepts with unmatched realism.

This platform is ideal for interior designers, architects, real estate agents, homeowners, and contractors seeking to elevate their design process and presentations. Affiliates will find HomeVisualizer.AI an attractive product to promote due to its broad applicability, ease of use, and tangible value in helping clients and users bring their dream spaces to life quickly and securely. Its commitment to data privacy and responsive support further enhances its appeal, making it a compelling choice for anyone looking to inspire and facilitate home transformations.

H2R Graphics is a versatile graphics overlay application designed for live streams and video productions. It enables users to easily create, customize, and manage a wide range of on-screen graphics, including lower thirds, tickers, messages, timers, images, videos, and more. With a simple three-step setup—download, add graphics, and output overlays—H2R Graphics streamlines the process of enhancing live content with professional-quality visuals. The software offers both a feature-rich free version and a Pro license with additional advanced capabilities such as video playback, animated graphics, multi-output support, theme packs, and dynamic data integration.

Ideal for content creators, event producers, educators, and organizations running live video events, H2R Graphics is a powerful yet accessible tool that fits seamlessly into most video production pipelines, supporting platforms like OBS, vMix, and ATEM switchers. Affiliates will find it an attractive product to promote thanks to its broad appeal, ease of use, and robust feature set—including offline functionality, unlimited graphics, and extensive customization options—which make it a go-to solution for anyone looking to elevate the visual impact of their live broadcasts.