The best affiliate programs like Saylo 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.

Happymonial is a user-friendly platform designed to help businesses collect, showcase, and analyze customer testimonials with ease. Its core functionality allows users to seamlessly gather feedback and display it on their websites through simple HTML integration, without the need for technical expertise or additional hosting. With customizable design and layout options, Happymonial ensures that testimonials perfectly match your brand’s aesthetic and can be placed anywhere on your site, from landing pages to product sections, maximizing their impact on potential customers.

Ideal for business owners, marketers, and web designers looking to leverage social proof, Happymonial stands out by offering AI-powered sentiment analysis. This feature automatically categorizes testimonials by sentiment, providing valuable insights into customer satisfaction and enabling data-driven improvements to products and services. Affiliates will find Happymonial an attractive choice to promote, as it addresses a universal business need—boosting credibility and conversion rates through compelling and beautifully presented customer feedback.

Genesys Growth offers hands-on product marketing and content consulting tailored specifically for Series A and later-stage B2B SaaS companies. Led by a senior operator who works directly with clients, Genesys Growth specializes in go-to-market (GTM) strategy, messaging and positioning, website and landing page development, product launches, and full-funnel content programs. Using a blend of AI-driven insights and deep industry expertise, the service delivers clear, differentiated messaging and rapid, output-based execution—often with weekly deliverables and always-on communication. Trusted by over 35 founders and GTM leaders at notable companies, Genesys Growth is known for its founder-level commitment, hands-on collaboration, and proven results, such as delivering new marketing sites in just 45 days and accelerating enterprise client acquisition.

This offering is ideal for founders, marketing leaders, and GTM teams at fast-growing SaaS businesses who need more than just advice—they need a strategic partner who executes alongside them. Affiliates will find Genesys Growth an attractive program to promote to B2B SaaS companies seeking practical, results-oriented GTM support, as it stands out with its focus on execution, AI-powered research, and a track record of helping teams build effective positioning and content that drive pipeline and growth.

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.

Unravel.Markets offers advanced, market-neutral factor portfolios tailored specifically for the digital asset and cryptocurrency markets. Utilizing both traditional and proprietary risk and alpha factors, their institutional-grade solutions are designed to deliver high-performance results while minimizing exposure to broad market movements. The platform features unique datasets and alpha sources, including liquidity, orderbook-derived, flow, on-chain, and sentiment factors, empowering users to access and deploy sophisticated investment strategies previously limited to traditional finance.

This service is ideal for institutional investors, quantitative traders, and crypto asset managers seeking robust, data-driven portfolio management tools that emphasize risk-adjusted returns and diversification. Affiliates will find Unravel.Markets an attractive program to promote due to its cutting-edge technology, strong performance metrics, and appeal to a growing audience of professional and advanced crypto investors looking for innovative ways to gain an edge in the digital asset space.

Udit.co offers specialized growth consulting and actionable resources for SaaS founders seeking to streamline their operations, automate lead generation, and accelerate revenue growth. Led by Udit Goenka, a seasoned SaaS growth consultant, angel investor, and multiple-time founder, the service provides tailored strategies that address the unique challenges of SaaS startups at every stage—from pre-launch to scaling. Udit’s approach combines proven frameworks for sales, automation, and marketing with a focus on building investor-ready, scalable businesses. Additional offerings include an AI-powered content tool for personal branding, MVP development as a service, and a high-value newsletter delivering weekly insights on SaaS growth.

This service is ideal for SaaS founders and entrepreneurs who want to move beyond stagnant growth and manual processes to achieve predictable, sustainable results. Affiliates promoting Udit.co can confidently recommend a results-driven consultancy with a track record of generating significant revenue, helping clients secure funding, and turning complex growth concepts into actionable, easy-to-implement steps—making it a valuable resource for ambitious SaaS leaders.

TourFlow is an all-in-one inbound tour operation software designed to streamline and automate every aspect of managing client journeys for travel businesses. The platform offers comprehensive features including CRM and task management, itinerary planning, automated pricing, vendor management, booking, invoicing, and auto-generated itineraries—all accessible through a cloud-based system. With TourFlow, tour operators can control the entire client process from initial inquiry to booking and payment, reducing errors and increasing efficiency while allowing for flexible customization to fit unique business needs.

TourFlow is ideal for inbound tour operators, travel agencies, and DMCs looking to upgrade from manual processes to a centralized, digital solution. Its ease of use, automation capabilities, and remote accessibility make it a valuable tool for teams aiming to enhance productivity and service quality. Affiliates promoting TourFlow can confidently recommend a robust software that addresses the core challenges of tour management, making it an attractive choice for travel businesses seeking to scale and optimize their operations.