VSLAI offers Free Trial, but Certainly does not.
Pricing for VSLAI Starts at $39/month whereas for Certainly Starts at $2165/month.
Certainly offers several advantages, including Personalised customer support, Reduces wait times, Helps with purchase process, Helps with checkout process, Manages post-sales support and many more functionalities.
The cons of Certainly may include a Not open source, Limited language support, Limited compatibility, No stated confidentiality measures. and No specific privacy data handling