We allow self-signing documents which PandaDoc doesn't. Outside of Google Docs add-ons we're also the only e-signatures provider that has a direct Gmail plugin

We allow self-signing documents which PandaDoc doesn't. Outside of Google Docs add-ons we're also the only e-signatures provider that has a direct Gmail plugin integration (https://www.hellosign.com/gmail https://www.hellosign.com/gmail). We also have an API for developers to integrate the signing workflow seamlessly into their app.