SignServer is Keyfactor's digital signature server for code signing, document signing and timestamping. Compare community vs enterprise editions, pricing and…
SignServer is a server-side digital signature platform that automates the signing of code, documents, containers, firmware, and other digital artifacts, keeping private signing keys centralized and typically protected inside Hardware Security Modules (HSMs).
The product was first released in 2005 by PrimeKey Solutions, a Swedish PKI company, and has been developed for over two decades. Keyfactor, a US-based digital trust and PKI company headquartered in Independence, Ohio, acquired PrimeKey in June 2021 and now sponsors and sells SignServer as part of its Enterprise PKI product line.
Unlike consumer e-signature tools built for individuals to sign contracts by hand, SignServer is infrastructure software: it is embedded into CI/CD pipelines, release processes, and document-generation systems so that signing happens automatically, at scale, with a full audit trail.
SignServer supports a wide range of signature types, including JAR, CMS, OpenPGP, Debian package, PDF, XML, and plain code signing, as well as RFC 3161-compliant timestamping services.
The platform is designed for infinite horizontal scalability by running multiple SignServer instances behind a load balancer, and it integrates into CI/CD pipelines so builds and releases can be signed automatically as part of the deployment process.
SignServer includes quantum-ready code signing capabilities to help organizations prepare their signing infrastructure for post-quantum cryptography requirements, along with authentication controls and detailed audit logging for every signing operation.
The SignServer Community Edition is free and open-source under the LGPL v2.1 license, distributed as prebuilt binaries, Docker containers, or source code for organizations willing to self-manage the deployment.
SignServer Enterprise Edition is a paid, supported product available as a software appliance, a PrimeKey/Keyfactor hardware appliance, or a cloud edition on the AWS and Azure marketplaces, priced per CPU core of the underlying virtual host plus a chosen support tier.
Keyfactor does not publish list prices for Enterprise or multi-node deployments; organizations must contact Keyfactor sales directly for a quote, though 30-day free trials are available through the AWS and Azure marketplace listings.
SignServer is used to automate digital signing of code, documents, containers, firmware, and other digital artifacts, along with RFC 3161 timestamping, typically as part of CI/CD pipelines or document-generation systems.
No, SignServer is infrastructure software for automated, server-side cryptographic signing, while tools like SignNow, SignRequest, and SignWell are consumer e-signature platforms for individuals signing contracts by hand.
SignServer was created by PrimeKey Solutions, which was acquired by Keyfactor in June 2021. Keyfactor now sponsors and sells SignServer.
The SignServer Community Edition is free and open-source under the LGPL v2.1 license. The Enterprise Edition is a paid, supported product with custom pricing.
Enterprise and cloud marketplace pricing is based on the number of CPU cores of the host and the chosen support tier; exact pricing requires contacting Keyfactor sales.
Yes, SignServer is commonly deployed with HSMs to centrally protect private signing keys used for signing operations.
Yes, SignServer is designed to integrate into CI/CD pipelines so builds and releases can be signed automatically without manual intervention.
SignServer was first released in 2005 by PrimeKey Solutions; the Enterprise edition launched in 2012.