This tool is not as well-known as SurveyMonkey but is just as powerful and not as expensive.
Professional paid for versions are available from £20 per user per month (there is a free version).
It’s also part of a wider suite of software solutions which can be integrated so may be more suitable for some law firms, especially smaller firms looking for a range of flexible software solutions.
Zoho’s wider range of software solutions are packaged under the Zoho One name, checkout Zoho One here: https://www.zoho.com/one/
… available from £360 pa per user.