The valuation of a startup in its idea stage can be a tricky process. Here are the things to consider when determining the valuation of a startup at this stage:
Market Size: Estimate the size of the addressable market and overall market potential.
Competition: Evaluate the competitive landscape. Are there any direct competitors in the same space? Are there any substitutes in the market?
Product/Service Uniqueness: Analyze how unique the startup's product or service is and how it will stand out from its competitors.
Traction: Look into the startup's traction. Does it have users? Has the startup received any monetary or non-monetary investments? Has the team received any awards or won any competitions?
Team Skills: Analyze the startup team's skill set. Does the team possess the necessary skills to bring the startup to the next level?
Taking all of this into account, it is important to bear in mind that the valuation of a startup in its idea stage is a subjective process, and will be heavily influenced by investors' personal preferences.
For more information on startup valuations, you can find a useful guide here: https://www.sandhill.com/article/how-to-valuate-a-startup/.