I switched to an online fax service when my workload increased and speed became critical. What impressed me most was how well confidentiality is maintained without slowing anything down. Secure, encrypted systems make it easy to manage private information even when documents need to be sent urgently.
Based on my own use, I’d definitely recommend looking deeper into how these services work. A good starting point is https://wikipagecreator.net/ where you can find all the details about secure workflows and data protection. It made my decision much easier.