ProsperStack Verified Customer Reviews (2026)

Since its inception in 2010, FastBound has successfully handled over one billion transactions through its Electronic A&D and Electronic 4473 FFL software, serving countless Federal Firearms Licensees (FFLs). Rather than diversifying into many areas, FastBound has honed its focus on becoming a leader in firearms compliance software. The company's deep expertise and attentive customer support are key factors that lead software companies to prefer FastBound over any other provider for their firearms compliance needs. FastBound boasts a powerful API that integrates seamlessly with an expanding array of point of sale (POS), enterprise resource planning (ERP), and various other software solutions. Additionally, it offers a compliance guarantee backed by legal expertise, ensuring peace of mind for its users. Proudly developed and supported entirely within the United States, FastBound continues to set the standard for excellence in its niche market. The commitment to quality and customer satisfaction further reinforces its reputation as a trusted partner in the firearms industry.

Revaly is built to solve one of the most costly and overlooked problems in subscription commerce: legitimate payments failing for preventable reasons. Its end-to-end Payment Performance Management platform leverages machine learning, issuer intelligence, and ecosystem data to elevate approval rates starting from the very first transaction attempt. The system automatically detects issues such as mistyped card numbers, routing mismatches, and metadata errors before a customer ever checks out. When payments do fail, Revaly uses a sophisticated retry engine that studies customer behavior, card network patterns, and historical success windows to recover revenue without damaging relationships. Businesses across industries report dramatic improvements—from 34% to over 50% increases in recovered payments—demonstrating the compound value of consistent, optimized approvals. Revaly’s integration ecosystem makes adoption frictionless, connecting seamlessly with CRMs, billing systems, payment gateways, and processors already in use. The platform not only protects revenue but stabilizes growth by reducing churn that comes from unintentional payment failures. Leadership teams gain visibility into payment performance metrics that go far beyond authorization rates, revealing hidden revenue opportunities and operational inefficiencies. As a result, companies can build smarter billing strategies and deliver a more reliable experience for customers. Revaly becomes a trusted partner in improving profitability, ensuring that when a customer says “yes,” the payment system does too.

Rezup is a churn feedback tool for subscription businesses. It shows why customers cancel and how much revenue each reason costs. Key features: - Stripe integration with a read-only key: detects cancellations and downgrades - Automatic follow-up email from your name after each cancellation - Voice or text answers in the browser, no app or account, 120+ languages - Automatic transcription and translation - AI analysis: reasons ranked by lost MRR, trends, quotes and a suggested next step - Weekly email summary, Slack and Telegram alerts - Reply to customers from your own email - Link, QR code and website widget for feedback outside Stripe - CSV and Excel export, webhooks, REST API Benefits: learn the real reason behind each cancellation, fix what costs the most first, and reach unhappy customers while they are still deciding. Pricing: free up to $5k MRR (50 responses a month); paid plans from $29 a month.