If you require a robust solution for secure PDF processing in a business context, especially where high volume and security are concerns, go for Stirling-PDF. Its open-source nature and ability to handle large document loads make it ideal for organizations focused on security and efficiency. Just be mindful of the potential costs associated with the paid model and limited mobile functionality.
On the other hand, if you're a Mac user looking to enhance productivity through automation and quick access to applications, Alfred is your best choice. It excels in creating customized workflows and is fast and reliable. However, be prepared to purchase the Powerpack to unlock its full potential, and remember that it's not suitable if you need cross-platform support or AI capabilities. Choose based on your specific needs in PDF management or productivity enhancement.