Yes. At least one other electronic signature service has publicly reported being compromised in the past. In general, data leaks, breaches, and hacks are a large and growing problem. The last few years have seen many large, high-profile incidents — and in most of them hundreds of millions, or even billions, of files and pieces of personal data were stolen by criminals. The chances of your electronically signed documents being compromised is increasing each year, and the potential impact — in fines, reputation damage, and legal issues — is growing.

We are not aware of any other electronic signature service that operates the same way we do. We also are not aware of any other service that operates in any other manner that ensures the security, privacy, and confidentiality of your documents, data, and signature, and can guarantee it can't be breached, leaked, or hacked.

Other services are fundamentally insecure in the way they operate. They upload, store, transmit, and make copies of your documents, its text, and your signature. Any time that happens, those files can be breached, leaked, or hacked. Other services claim “enterprise-grade security”, which just means they follow a set of standard security protocols to protect your documents, data, and signature. Yet they still store, transmit, and make copies of your data, and expose it to be breached, leaked or hacked. Their enterprise-grade security does not prevent this from happening, it only reduces the likelihood of it happening. Proba operates in a fundamentally different way that prevents and does not allow your documents, data, or signature to be breached, leaked, or hacked.

At the moment, Proba only supports PDF documents that are not password protected.

Seconds. Because we don't upload, store, modify, or transmit your documents, data, or signature on our end — and we operate in the browser that you already have opened — we remove a lot of steps and back-and-forth from the process. This saves time, reduces the technical workload and lets you electronically sign documents much faster with Proba than with other services.

Proba is a 100% free service. You can electronically sign as many documents as you want with Proba without paying a single cent. You don't even have to create an account or profile, or share any of your personal profile data with us.

No, we don't store any data. The data that is used to create the electronic signature, including the electronic signature itself, only exists in memory when it is created, but it is immediately purged from memory when the digital signature is created and not persisted or stored in any way.

Yes, we have a macOS app. The macOS app can be downloaded from our Apps page.