The best affiliate programs like SoftoUltra 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.

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.

Immokalkulation.de is a professional real estate calculation tool designed to streamline property analysis for investors, agents, and anyone involved in real estate transactions. The platform offers comprehensive features for evaluating real estate investments, enabling users to make informed decisions based on detailed financial projections, cost breakdowns, and profitability assessments. Its user-friendly interface and robust calculation capabilities cater to both seasoned professionals and newcomers seeking accuracy and efficiency in their real estate evaluations.

This service is especially beneficial for real estate investors, brokers, and consultants who require reliable tools to assess property opportunities and present clear analyses to clients or partners. Affiliates promoting Immokalkulation.de can target a growing market of property professionals and private investors looking for powerful yet accessible solutions to optimize their investment decisions, making it an appealing choice for those in the real estate niche.

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.

Zero to Shipped is a comprehensive Next.js starter kit designed to help developers launch a full-stack SaaS application in production in less than 15 minutes. Created by an experienced founder who has shipped multiple successful apps, this template streamlines the process from project setup to deployment, providing all the essential features needed for a modern SaaS, including authentication, admin panel, role-based access, user management, onboarding, and multi-tenancy. It comes packed with advanced backend infrastructure like Prisma integration with Postgres, background workers, cron jobs, and seamless deployment environments, as well as frontend enhancements like responsive design, dynamic SEO meta tags, UI animations, and a built-in blog and landing page. The kit also supports AI integration, customizable email templates, and payment processing, making it a truly end-to-end solution for launching a SaaS product.

Zero to Shipped is perfect for developers, startups, and entrepreneurs who want to get their SaaS ideas to market rapidly without the usual headaches of configuration and boilerplate code. Affiliates will find this product appealing to a wide audience eager to save development time, reduce technical complexity, and start generating revenue quickly. Its proven, production-ready tech stack and active community support make it a smart, high-value choice for anyone serious about building and shipping SaaS products efficiently.

BlueStar Supply offers professionally designed Framer website templates that empower business owners, entrepreneurs, and agencies to quickly build and launch stunning, high-converting websites without the need for expensive designers or coding skills. Each template is crafted by expert designers and comes with step-by-step tutorials, making it easy for anyone—regardless of technical ability—to customize their site and bring their brand to life. The process is streamlined: users select a template, follow intuitive guides, personalize their content with drag-and-drop ease, and launch their website in just hours, all at a fraction of the cost of traditional web design services.

This solution is ideal for small business owners, freelancers, startups, and anyone needing a professional online presence without the hassle, delays, or high costs typically associated with website creation. Affiliates will find BlueStar Supply an attractive program to promote, as it addresses a widespread pain point with a proven, budget-friendly alternative that has already delighted hundreds of customers. The combination of quality design, ease of use, and affordability makes it a compelling choice for audiences seeking to boost their business with a powerful website.

GapSnaps is an innovative market research platform designed to help entrepreneurs, product creators, and SaaS founders discover validated pain points and untapped opportunities for their next product. By harnessing real-time conversations and data from millions of Reddit posts and comments, GapSnaps leverages AI-powered analysis to surface the most pressing frustrations, unsolved problems, and hidden needs voiced by actual users. Key features include pain point detection, trend and sentiment analysis, custom audience insights, and easy-to-use search functionality, all aimed at enabling users to find actionable ideas before they hit the mainstream.

This service is ideal for anyone looking to validate business ideas, identify lucrative niches, or develop products that solve real problems. Affiliates will find GapSnaps an appealing offer for their audience, as it provides an essential toolkit for building successful, in-demand products with confidence—making it a valuable resource for startup founders, indie hackers, and market researchers seeking a competitive edge.

GanttMaster is a comprehensive project management scheduling software designed to help teams and organizations efficiently plan, track, and execute projects of any size. With its intuitive interface, GanttMaster offers robust tools for project cost management, risk mitigation, and team coordination. Users can easily assign tasks, gain a centralized overview of project status, and manage deadlines with features like a real-time, interactive Gantt chart. The software supports seamless drag-and-drop adjustments, enabling instant updates to task durations, dependencies, and timelines, all while maintaining project coherence and visibility.

Ideal for project managers, team leaders, and organizations juggling multiple projects, GanttMaster simplifies complex scheduling and enhances team collaboration with powerful dependency management, detailed team and role-based access controls, and a comprehensive notification system. Affiliates will find GanttMaster an attractive program to promote due to its user-friendly design, versatility across industries, and strong appeal to businesses seeking to optimize project delivery and team productivity.

fwdAP is an intelligent accounts payable (AP) automation solution designed specifically for QuickBooks Online users. It streamlines the process of entering bills and credit card receipts by allowing users to simply forward invoices or receipts to a dedicated inbox, where fwdAP automatically processes and posts them directly into QuickBooks Online. With its plug-and-play setup, there’s no need for complicated mapping, syncing, or learning new software—businesses can get started quickly and see immediate workflow improvements. The platform also offers flexible rule-setting using conversational language, letting users customize how invoices and receipts are handled based on their unique bookkeeping requirements.

fwdAP is ideal for small business owners, bookkeepers, and accountants looking to save time, reduce manual data entry errors, and keep financial records accurate and up to date. Its ease of use, mobile accessibility, and focus on automation make it a valuable tool for anyone wanting to focus more on growing their business and less on paperwork. Affiliates will find fwdAP an attractive offer for clients who value efficiency, accuracy, and simplicity in their accounting processes.

Full-Stack Kit is a comprehensive collection of prebuilt Next.js full-stack web development features and components designed to help developers launch SaaS and web applications faster. Built with Next.js 15, TypeScript, Tailwind CSS, and Prisma (with support for various databases), it streamlines the setup process by providing ready-to-use solutions for authentication (including email/password, magic link, and major OAuth providers), role-based authorization, payments and subscription management via Stripe, internationalization, and a robust admin panel. The kit also includes beautifully designed UI blocks for landing pages, feature showcases, and pricing sections, alongside reusable code logic for core app functions like email and user management.

Full-Stack Kit is ideal for developers, startups, and teams who want to save time on repetitive setup tasks and focus on their application's unique value. With its clean, modern codebase, extensive feature set, and flexible templates, it empowers users to build and scale projects efficiently. Affiliates can confidently promote Full-Stack Kit as a time-saving, developer-focused solution that helps clients go from idea to launch in days, making it a compelling choice for anyone targeting the web development or SaaS markets.