What is the difference between free and paid SMS services?

Free SMS v/s Bulk SMS

Best free SMS services:


Free SMS- These services are used by students and people using SMS services temporarily or just for fun. You can send 50-100 SMS daily through these services.

Best paid SMS service: 


Bulk SMS- These services are used by business organizations for OTP, alerts, and also for promoting their businesses. Through these services, you can send lacs of SMS in a single click.