HelloSign's template feature is not free, unlike RabbitSign.
I used to try every new service coming out of AWS. Not anymore. Even for someone who used to work at AWS, they are getting harder and harder to understand and use. A couple of years I tried Amazon…
An alternative is RabbitSign.com. AFAICT, it is truly unlimited free. I sent 50+ documents for signatures last month and it never asked me for a credit card.
EC2. In 2006, when I got a running Linux box with root access and a public IP in a couple of minutes, I was blown away. So much so that I moved from Chicago to Seattle and joined Amazon.