Clearbanc just launched a valuation tool that its cofounders are calling a credit score for startups. Here's what entrepreneurs need to know before signing up.

· Clearbanc, the startup that provides startup funding through revenue-share agreements, launched a tool Thursday that it says could help startups gauge their valuations better.
· According to Clearbanc founders Andrew D'Souza and Michele Romanow, the tool will act like a credit score for entrepreneurs and startup founders by...