Mailtrap: Product updates, Customer stories, and Insights | 2026 Cuspera

TennisHub is a SaaS platform that helps tennis businesses manage bookings and drive paid on-court activities. The challenge was to make it easier for players to find and book tennis opportunities onl...ine. Railsware used their Inception framework to plan and build TennisHub, handling both front-end and back-end development. The solution automated registration, booking, and payment, making operations easier for facility managers. TennisHub credits Railsware's process and team for their business success.
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Railsware helped 4Finance build the Partners Platform for microfinance. 4Finance needed a simple, fast lending solution for people with average incomes in 12 countries. Railsware handled front-end, b...ack-end, and UI design, working closely with 4Finance's internal API team. The project ran from September 2014 to December 2016. 4Finance has provided over 5.8 million loans to 3.3 million customers.
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Railsware migrated Plum District from Rails 1 to Rails 3. They did front-end and mobile development. They built a unified API for web and mobile. They helped Plum District scale the app. Plum Distric...t praised Railsware for high-quality work and strong testing. The partnership improved development speed and product quality.
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SupaDupa lets users build online stores with no coding. The challenge was to offer boutique-quality customization at a low price. Railsware helped SupaDupa add features for easy theme and design chan...ges. Users can adjust colors, fonts, and upload custom assets. Advanced users can edit templates and CSS. The new tools made it simple for creatives to launch unique online shops.
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StartWire used Railsware to build a job search organizer. The challenge was to help job seekers get updates on their job applications. Railsware created a system that gives automatic status updates a...nd job recommendations. They built the UI, back-end, and integrated with social networks and applicant tracking systems. The result is a tool that helps users apply faster and hear back sooner.
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Railsware helped Calendly grow from idea to a $3 billion company. Calendly is an online scheduling tool that integrates with Google, Outlook, Office 365, and iCloud. Railsware led the Inception proce...ss, saving time and money by identifying risks early. They managed front-end, back-end, and design, supporting Calendly through all development stages. The platform now automates scheduling and connects with tools like Salesforce, Stripe, and HubSpot.
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