The best affiliate programs like Refero 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.

inFlight is an advanced sound add-on designed for Microsoft Flight Simulator 2020 and 2024, offering dynamic, AI-powered crew and passenger announcements that adapt to each unique flight. Leveraging real-time flight data, routes, weather, and airports, inFlight delivers immersive pilot and crew communications in over 50 languages and accents, ensuring that every flight experience feels authentic and engaging. Unlike traditional audio packs that use static recordings, inFlight's announcements are hands-free and automatically triggered according to the various phases of flight, providing a seamless and realistic atmosphere. The add-on is easy to install, requires no additional programs or complex customizations, and includes ongoing updates with the latest AI-driven features.

This product is ideal for flight simulation enthusiasts who want to elevate their MSFS experience with realistic audio immersion, as well as for streamers and content creators seeking to enhance the authenticity of their virtual flights. Affiliates will find inFlight a compelling choice to promote due to its unique AI technology, ease of use, multilingual capabilities, and strong appeal to the large and passionate MSFS community, making it a valuable addition to any affiliate program focused on gaming or simulation tools.

InfoFlow is a versatile read-it-later and personal knowledge management app designed with a local-first approach, ensuring that users retain full ownership and privacy of their data. The platform offers breakthrough speed, seamless syncing across all devices, and full offline functionality, allowing users to access and manage their content whether or not they're connected to the internet. InfoFlow supports a wide range of features including bookmarking, note-taking, content creation, and knowledge base building, making it an all-in-one solution for organizing and accessing information. With support for Windows, Android, iOS, macOS, and web platforms, InfoFlow ensures a smooth and consistent user experience across any device.

Ideal for professionals, students, and anyone who values privacy and efficient knowledge management, InfoFlow stands out for its security-focused, affordable, and easy-to-use design. Affiliates promoting InfoFlow can confidently recommend a robust tool that appeals to privacy-conscious users seeking to streamline their workflow and organize their information without relying on cloud-dependent solutions. This makes InfoFlow a compelling choice for those looking to offer real value to their audience while earning competitive commissions.

IELTS Writing Pro is an advanced online platform designed to help users prepare for the IELTS exam by providing detailed, personalized feedback on their writing. Leveraging cutting-edge AI technology, the service offers realistic band estimations based on official IELTS grading criteria—including Grammar, Task Response, Coherence and Cohesion, and Lexical Resource—and delivers comprehensive correction reports with in-depth insights. Users can choose from over 250 practice questions or submit their own, track their progress with unlimited submissions, and receive actionable suggestions to boost their scores. The platform supports both Academic and General Training tasks and provides instant, 24/7 access to professional-level writing assessment at a fraction of the cost of traditional correction services.

IELTS Writing Pro is particularly beneficial for students, professionals, and anyone aiming to achieve a higher band score on the IELTS exam through efficient, targeted practice. Affiliates will find this product appealing to promote as it offers a valuable, cost-effective, and user-friendly solution for test-takers seeking to improve their writing skills quickly and reliably. With its generous free trial, affordable pricing, and proven ability to help users understand and meet IELTS standards, it stands out as a smart choice in the test preparation space.

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.

How to Prompts Uno is a comprehensive platform designed to help users master the art of prompt engineering for AI tools such as ChatGPT, Midjourney, and more. The service offers a curated library of high-quality prompts, detailed guides, and practical examples to empower users to generate better results from AI models. Whether you're a beginner or an experienced AI enthusiast, How to Prompts Uno provides step-by-step tutorials, prompt templates, and insights into the latest advancements in generative AI, making it easier to harness the full potential of modern AI tools.

This platform is ideal for content creators, marketers, educators, developers, and anyone interested in leveraging AI for creative or professional tasks. Affiliates will find How to Prompts Uno an attractive product to promote due to its broad appeal, actionable resources, and growing demand for AI literacy. It offers tangible value to users seeking to improve their productivity and creativity with AI, making it a compelling choice for those looking to monetize audiences interested in technology, innovation, and digital transformation.

HeyAlbert.co specializes in expertly crafted Notion templates designed to help individuals, students, and professionals stay organized, productive, and focused. Developed by a Notion Recommended Creator with over two years of experience, the platform offers a wide range of templates catering to personal productivity, finance management, academic organization, business processes, and more. With over 30,000 satisfied customers worldwide and a robust collection of handpicked, top-rated templates such as Finance OS, Automated Student Dashboard, and LiFE RPG, HeyAlbert.co provides practical digital solutions to streamline daily tasks and long-term goals. The templates are intuitive, visually appealing, and tailored to maximize the potential of Notion for users at any experience level.

HeyAlbert.co is ideal for students looking to better manage their coursework, professionals aiming to boost efficiency, freelancers seeking streamlined workflows, and anyone interested in personal development and organization. Affiliates will find this program appealing to a broad audience, as the templates address real-world productivity challenges and have garnered strong testimonials and high ratings. By promoting HeyAlbert.co, affiliates can confidently offer valuable, proven tools that help users achieve more with Notion, making it a compelling choice for those targeting productivity, education, and self-improvement markets.

Habit Genius is a customizable habit tracker widget designed specifically for Notion users who want to build and maintain positive habits. With its intuitive interface, Habit Genius provides a clear visual history of your daily progress, making it easy to track and update habits on both desktop and mobile devices. By focusing on daily practice and encouraging consistency, this widget helps users leverage the power of routine to achieve long-term personal growth.

Ideal for productivity enthusiasts, self-improvement seekers, and anyone who relies on Notion to organize their life, Habit Genius offers a simple yet powerful solution for habit tracking. Affiliates will find this product appealing to a wide audience looking to adopt healthier routines and make lasting changes, making it a valuable addition to any affiliate program portfolio.

GuestLab is an AI-powered research assistant designed specifically for podcasters who want to streamline and enhance their guest preparation process. By automatically analyzing LinkedIn profiles and leveraging a vast database of podcast episodes, GuestLab generates personalized intros, unique topics, and insightful questions for each guest in seconds—saving hours of manual research. The platform offers deep insights, customizable AI prompts, and even PDF downloads of research, catering to everyone from hobbyist hosts to professional podcasters and agencies.

This tool is ideal for podcast hosts, producers, and agencies seeking to deliver higher-quality interviews and more engaging episodes without the heavy time investment typically required for research. Affiliates will find GuestLab an attractive product to promote due to its clear value proposition, time-saving benefits, and tiered pricing that appeals to a wide range of podcasting professionals, making it a compelling solution in the growing podcasting industry.

X-ray Interpreter is an AI-powered platform that delivers instant, preliminary analysis of medical images such as X-rays, CT scans, MRIs, PET scans, ultrasounds, and more. Designed for both patients and healthcare professionals, the service allows users to securely upload their radiology images and receive detailed, easy-to-understand reports within moments. The platform offers layman-friendly summaries, personalized follow-up explanations, and the flexibility to ask additional questions, all at highly affordable, pay-per-use pricing. Users can preview analysis reports for free before deciding to purchase the full interpretation, ensuring satisfaction and transparency. Trusted by tens of thousands of users and cited by leading medical journals, X-ray Interpreter brings expert-level insights directly to your home, empowering informed medical decisions without long waits or high costs.

This service is ideal for individuals seeking rapid second opinions, families wanting peace of mind for their loved ones (including pets), and even medical professionals looking to supplement their analyses or facilitate continuous learning. Affiliates will find X-ray Interpreter a compelling choice to promote due to its broad appeal, user-friendly experience, and accessible pricing, making it a valuable resource for anyone needing fast, accurate, and confidential radiology interpretations from anywhere in the world.