The top solutions in this market must know the sSign compliance rules in many countries, and industry-specific compliance within each country.
Long-tail eSign solutions that are able to focus on a specific industry, country, or niche are more likely to charge per transaction, or a low subscription fee.
So for your lease agreement use case, the Lenders/Landlords likely have several SaaS options at their disposal for one-off transactions.
https://www.fdic.gov/resources/supervision-and-examinations/...