A zero-cost foundation for validating billing workflows and tracking early product metrics.
As a junior PM in a growing fintech startup, you need to coordinate product requirements and establish basic billing and payment flows without a dedicated engineering budget or complex infrastructure.
You will have a centralized product wiki, a functional payment gateway with basic fraud detection, and automated financial reporting dashboards to track early traction.
Centralized workspace for product requirements documents (PRDs), roadmap tracking, and team collaboration.
Handles secure payment transactions and utilizes built-in machine learning for proactive fraud detection.
Manages complex usage-based billing calculations and subscription logic before passing to the payment gateway.
Tracks key SaaS and transactional metrics like ARR, churn, and customer retention automatically.
Lago connects natively to Square via API to trigger payments once usage-based invoices are calculated.
SaaSGrid pulls transaction data from Square to generate real-time revenue and retention dashboards.
This stack leverages powerful open-source and free-tier tools to establish a payment processing and product management workflow without upfront software costs. It is designed for a junior product manager to easily coordinate tasks, manage documentation, and track financial metrics.
