Electronic signature for
every use case
From a SaaS platform for everyday users and APIs for developers to enterprise infrastructure deployed on-premises — all built on a single signature foundation and in full compliance with the European eIDAS regulation.
Our solutions
For everyone who
signs digitally
01/04
4SIGNER Platform
Comprehensive SaaS platform for document signing, verification, and archiving — for companies and individuals, no installation required.
- Signature, verification, archive, and timestamps
- Electronic inbox and signature history
- Client portal and mobile app
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02/04
Certificates for e-signature
We are a certification authority for all levels of electronic signatures under eIDAS — from basic to qualified.
- All certificate types, 3 levels of legal certainty
- Virtual smart card with no card reader required
- Issuance and renewal fully online
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03/04
API Solutions
Integrate signing into your own systems via a unified REST API — no local installation on end-user devices.
- Signing connected to your own system
- Deployment without local installation at the client side
- Integration into your custom software in just a few days
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04/04
Enterprise Solutions
Signature infrastructure deployed in your environment — custom CA, RA, HSM, and IAM, or hosted with us.
- 11 modules: Web Signer, PKI API, Archive, RemoteHSM...
- Data and keys remain in your infrastructure
- Tailored deployment and full support
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In compliance with the European
eIDAS regulation
We are a trust service provider listed on the European Trusted List — our solutions are fully aligned with EU Regulation No. 910/2014 on eIDAS. Certificates issued by our company meet strict identity protection and verification requirements, are legally recognized, and can be used as evidence in courts across the entire European Union.
REGISTER
European Trusted List
REGULATION
eIDAS - 910/2014
VALIDITY
Entire European Union
Case Studies
Deployed at client sites,
proven in practice
Discover how 4SIGNER developed custom software for electronic signing of contracts and applications for BVS water utility.
In response to growing client expectations and the need for digitization, we designed and successfully implemented a modern online client portal for Tatra Leasing.
Aby mohla poliklinika neustále zvyšovať úroveň poskytovaných služieb, rozhodla sa do ponuky pre pacientov zaviesť elektronické podpisovanie.
TRUSTED BY INDUSTRY LEADERS
Reseller partners
of 4SIGNER solutions
Choose a solution,
tailored just for you.
Platform, certificates, API, or enterprise deployment — we will advise you on which combination will be most cost-effective.