The 10 best API affiliate programs in 2025

Hybiscus is an innovative platform designed to simplify the creation of stunning PDF reports for developers and businesses, eliminating the need for design skills or complex CSS. By leveraging a simple JSON API, users can focus purely on content while Hybiscus handles the visual presentation using a library of expertly crafted, pre-designed components. The platform also offers AI-powered report generation, where users can describe their desired report in plain language and let Hybiscus AI convert it into the necessary JSON structure. With built-in data visualization tools, seamless cloud storage integration, a RESTful API, and extensive customization options for layout, colors, and fonts, Hybiscus ensures professional-quality reports are produced quickly and effortlessly.

Ideal for developers, SaaS companies, and teams that frequently generate or automate PDF reporting, Hybiscus streamlines what is typically a time-consuming, design-heavy process. Its ease of use, rapid setup, and modern approach to report generation make it a compelling solution for anyone needing polished PDFs without design expertise. Affiliates will find Hybiscus attractive to promote thanks to its clear value proposition, appeal to a broad range of professionals, and the growing demand for efficient document automation tools.

InPrivy is a secure platform designed for safely sharing sensitive information such as passwords, API keys, confidential notes, and files online. Unlike traditional methods like email or chat, where private data remains visible and vulnerable, InPrivy provides one-time encrypted links that ensure your information is accessible only to the intended recipient and is automatically voided after use. The platform is GDPR compliant, hosted in Germany with robust AES-256 encryption, and offers additional privacy features like customizable branding, domain options, password protection, team management, API access, and detailed usage notifications—all with a simple, intuitive interface.

InPrivy is an excellent solution for professionals and teams—such as law firms, accountants, IT companies, and agencies—who regularly need to exchange confidential data securely. Affiliates will find InPrivy appealing to promote due to its strong privacy credentials, lifetime pricing with no subscriptions, and broad appeal to businesses prioritizing data protection and compliance. Its ease of use and commitment to privacy make it a valuable tool for anyone needing to share sensitive information online without compromise.

Double Zero is an open-source email infrastructure platform that empowers users to fully own and control their email sending capabilities. Designed to simplify the deployment and management of email services, Double Zero provides an easy-to-use email API for sending transactional emails and supports advanced features like broadcasts and automations through its Pro version. With single-command deployment using SST, seamless setup of AWS services (SES, SNS, SQS, EC2, S3, Route 53), and a straightforward REST or JS API, users can quickly establish robust, scalable email infrastructure without relying on traditional third-party providers. The platform also offers features such as multi-recipient tracking, a WYSIWYG editor, SMTP endpoints, contact and list management, and team collaboration tools.

Double Zero is ideal for developers, SaaS businesses, and organizations seeking greater control, transparency, and cost-efficiency in their email operations. It stands out for its open and modifiable codebase, affordable pricing, and the ability to deploy within your own cloud environment, making it a compelling choice for privacy-conscious users and those looking to avoid vendor lock-in. Affiliates will find Double Zero attractive to promote, as it addresses a growing demand for customizable, developer-friendly email solutions that balance ease of use with full ownership and transparency.

InvoiceAhoy is a streamlined invoicing solution designed for developers and businesses that need to create, store, and deliver professional invoices directly from any web platform. Featuring an easy-to-use API, pre-built invoice templates, and integration options like Zapier, InvoiceAhoy takes the hassle out of invoice generation. With built-in compliance for global jurisdictions, automatic translation for localized customer communication, and secure encrypted document storage, users can quickly generate and send invoices that look great and meet all regulatory requirements.

This service is ideal for SaaS companies, online marketplaces, freelancers, and any business that needs reliable, automated invoicing integrated into their workflows. Affiliates will find InvoiceAhoy an attractive option to promote due to its developer-friendly approach, flexible pricing plans, and broad appeal for businesses seeking an efficient, compliant, and modern invoicing solution.

Apiwapp is a platform that enables businesses and developers to integrate WhatsApp messaging into their applications and workflows through a powerful and easy-to-use API. The service allows users to send and receive messages, automate notifications, and manage customer interactions directly via WhatsApp, all without the need for complex infrastructure or manual intervention. With features like multi-device support, real-time message delivery, and robust documentation, Apiwapp streamlines communication and enhances customer engagement for companies seeking a reliable WhatsApp integration.

This solution is particularly valuable for businesses looking to improve customer support, run marketing campaigns, or automate notifications through one of the world's most popular messaging platforms. Affiliates will find Apiwapp an attractive product to promote due to its simplicity, comprehensive feature set, and strong appeal to a wide range of industries seeking efficient and scalable communication tools.

SocialCards is an intuitive platform designed to help users create professional and eye-catching images for social media posts. With a full-featured image editor, customizable templates, and a unique ability to generate dynamic images and links with previews (Open Graph Images), SocialCards streamlines the process of enhancing social media engagement. Users can easily produce stunning visual content without any technical knowledge, download their creations at any time, and even utilize an API to automate image generation based on templates.

This service is ideal for marketers, social media managers, content creators, and businesses looking to increase their social media presence and clickthrough rates. Affiliates will find SocialCards appealing to a wide range of audiences who want to improve the effectiveness of their social media campaigns, making it an excellent product to promote for those seeking to offer value-added tools that drive online engagement and brand visibility.

Reffresh.com is a user-friendly platform that enables developers and teams to quickly create mock APIs without any coding required. Designed to streamline the development and testing process, Reffresh.com allows users to set up customizable API endpoints in just a few clicks, making it easy to simulate real-world scenarios and accelerate product development. The service emphasizes simplicity and efficiency, offering an intuitive interface that eliminates the need for complex configurations or technical expertise.

This solution is ideal for software developers, QA testers, and project managers who need reliable mock APIs for prototyping, testing, or demonstrating applications. Affiliates will find Reffresh.com an attractive product to promote due to its broad appeal across technical and non-technical audiences, its focus on saving time and reducing development friction, and its potential to become an essential tool in any modern development workflow.

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.

FramerAuth is a modern authentication platform designed to help developers and businesses integrate secure and seamless user authentication into their applications. With a focus on simplicity and robust security, FramerAuth provides a comprehensive suite of features including passwordless login, social login integration, multi-factor authentication, and advanced user management tools. The platform is built for flexibility, allowing for quick setup and easy customization to fit the needs of any project, while maintaining compliance with industry security standards.

FramerAuth is an excellent choice for SaaS companies, web developers, startups, and digital businesses looking to streamline their user onboarding process and enhance account security without the hassle of building authentication from scratch. Affiliates will find FramerAuth appealing to promote thanks to its developer-friendly approach, high demand for authentication solutions, and relevance across a wide range of industries and application types.

Roundproxies offers a comprehensive proxy solution designed for high performance, reliability, and wide global coverage. With access to millions of IPs across residential, datacenter, ISP, and mobile proxies, users benefit from unlimited bandwidth, 99.9% uptime, and seamless connectivity in over 190 countries. The platform provides advanced features such as geo-targeting, automated session management, and support for unlimited concurrent sessions, making it ideal for data collection, web scraping, ad verification, brand protection, and more. Their proxies are praised for speed, consistency, and exceptional customer support, earning high ratings and trust from thousands of businesses worldwide.

This service is particularly valuable for businesses, marketers, developers, and agencies that require reliable, scalable, and unbanned proxies for their operations. Affiliates will find Roundproxies an attractive offer to promote due to its competitive pricing, robust global infrastructure, and proven customer satisfaction, making it a strong choice for clients seeking secure and versatile proxy solutions.