Adam Louie, senior director of business operations at LeadGenius, significantly improved the company's financial visibility and cost efficiency by developing internal tools using Retool, despite having minimal engineering resources. These tools, which included applications for organizing customer accounts, tracking contractor costs, and managing data campaign workflows, helped LeadGenius save approximately $1 million in a year. The development of internal tools requires a careful balance between engineering resources and workforce productivity, with direct costs often calculated by multiplying an engineer's hourly wage by the hours spent on tool development and maintenance. Companies like Neo4j and Noble Schools have also benefited from internal tools, demonstrating their value by improving processes such as renewal tracking and student engagement. While the direct costs of developing these tools are quantifiable, the indirect costs of not using them, such as potential customer dissatisfaction and decreased employee productivity, are more challenging to measure. Overall, internal tools can unlock significant value by streamlining operations and enhancing organizational effectiveness.