The most powerful signature inbox on the market

Save time and costs in managing documents to be signed, with a powerful flow of signatures or approvals.


Some of the companies that trust Inbox



Going paperless and more economical

It replaces the traditional signature folder. The days of carrying around documentation are now over. Save time and costs.

Intuitive and usable

It works like your usual inbox in your email.


It adapts to all signature flows of your company, from the simplest to the most complex.


Greater security and integrity than the physical document.


Tracking, with detailed time and date


Allows the signature in batch, delegated signature, signing from your smartphone... It's a dream come true for any executive!

Regulatory compliance

Whether you use or not the digital certificate, Viafirma Inbox complies with the European legislation, both in Trusted Services (eIDAS Regulation) and protection of personal data (GDPR)

why choose viafirma inbox?

Powerful and easy-to-use at the same time

Simple, advanced or qualified signature

Sign with your local or cloud certificate, with OTP SMS or with your digitized or biometric signature.

Signature delegation

Introducing task delegation from one user to another. Tasks can be permanent or for a certain period of time, allowing to apply certain access filters.


Interface fully compatible with mobile devices, allowing to perform electronic signature tasks entirely from your smartphone. Free apps available on App store and Google play.

Signature Flows

Visually defines complex document signature workflows. Sign documents in any order, at the same time, or making approvals. Search by signatories that belong to a specific group, or job position, etc.

Integration with document managers

We are already integrated with the following ECM softwares: Documentum, Nuxeo, Alfresco, IBM Filenet, Sharepoint, etc.

Cloud Signature

Boosts Viafirma Inbox, combined with our centralized signature solution Viafirma Fortress


Creates 100 percent independent Digital Signature folder (portafirmas) web portals, with different design and graphic style


Metadata can be open values added at the time when the signature request is created, or predefined fixed metadata managed by the administrators of the platform.


Timestamping allows you to both check integrity and existence of the dataset, including time and date of the signature in the e-document.

The signature suitable for any need

Easy integration

With your document management system or any other eBusiness tool

resolutions to the most common questions


If I have multiple requests in my inbox can I sign them in one go?

Yes indeed. You can check all the signature requests to perform the electronic signature in a single operation.

Can I send documentation to sign to several people in one go?

We can define signatory as one or several people, a job, a group, or special “responsible for a user” or “subordinates of a user” groups

Can I sign with Viafirma Inbox from my smartphone?

Viafirma Inbox has an interface fully compatible with mobile devices, contemplating the implementation of tasks on the phone. It also includes native applications in Apple Store and Play Store for free.

Do they comply with the legal requirements of the European Union?

The electronic signature is an electronic dataset linked to an electronic document and its functions are:  to uniquely identify the signatory and to ensure integrity of the signed document. 

Related Articles


Viafirma Inbox and research foundations: Success stories

Viafirma Inbox, our electronic signature agenda that allows us to view, validate, sign and to keep in custody of all kinds of digital documents. A very useful solution especially for working environments using a lot of documentation or where mobility is a key factor.
Read more >

Delegación de Firma en Empresa

Signature delegation and how it can benefit you

No one has the ability to be in several places at the same time or to carry all the responsibilities of a company. Luckily, there is the figure of the signature delegation, which also takes advantage of the digital signature. What benefits can the signature delegation offer you? Why should you consider using it?
Read more>

Firma Digital Presencial

What is the purpose of having a digital signature for each department in the company?

One of the most useful tools to start the process of digital transformation in an entity is precisely the integration of the digital signature in its signature and authentication processes with both clients and employees. Therefore, we will detail how it affects the integration of a digital signature solution within an entity and what features and benefits can bring to each department.
Read more >

related guides and documentation


Double check the Digital signature folder (portafirmas) guide, Viafirma Inbox

Also in your smartphone or tablet

Available for iOS and Android

With your document manager or any other eBusiness tool

questions | demo | more information

We call you

Pick the best day and time and one of our professionals will contact you

Or if you prefer...

Tell us about your signing process and we will provide you with the solution that best suits your needs