Signature.io is a very modern company. It's a technology company selling a purely technological solution - e-signing API platform. However, the spirit of Signature.io is actually old-fashioned.
One thing we believe strongly in and are fighting for is 'real signatures'. We don't like e-signing solutions that are cold machines asking us to type in our name or 'check this box' to make your signature. We want to destroy that trend.
We believe in the personalization and the expression of a real signature. With our software people always sign with their real signature using a mouse, their finger, or a tablet pen. We want the logo to evoke this old fashioned sentiment brought into the light of the new modern world.
Futhermore, we plan to brand ourselves with evocative imagery of great historical figures - like Thomas Jefferson, John Hancock, and Ernest Hemingway. Men that changed things, often with their pen, with their signature. We want to bring that connection, that sentiment, to those who use Signature.io so that it becomes a brand they align their hearts to. In some ways, programmers see themselves as making the same kind of world changes with their software that these historical figures did. They want to 'make their mark' so to speak. We want to tug on that heart string of the developers we sell our product to.
I know this is a tricky dichotomy. So when all else fails think Hemingway - classically American, attractive, masculine, fearless, while to the point, efficient, and no bullshit. Or think John Hancock, the first to sign the Declaration of Independence, to sign it large, to be brave, to take a stand.
Final notes: I like the idea of 'Make your mark' - hence the X in the logo I designed that is currently on the site at Signature.io. I am partial to that X and would love to see it incorporated in a better way than I have done. Not sure if that is possible, but could be cool. Maybe an X on a document icon or something.
Okay, good luck! Looking forward to commenting on the designs and going through this process!