DigiCert Software Trust Manager vs SignServer

DigiCert Software Trust Manager governs and automates software signing across artifacts, tools, and teams. Signing workflows can run after security checks and cover containers, binaries, and other artifacts, including Windows packages, Java archives, Android APK/AAB files, and macOS application and installer formats. Teams can use Signing Manager Controller, command-line tools, or the Click-to-sign graphical application, and connect workflows through native connectors, GitHub Actions, CLI tools, and APIs. Role- and team-based access, policy templates, workflows, and approvals govern high-risk signing actions. Logs link signed items to an actor and time for audits and incident response. Keys can be stored in FIPS 140-2 Level 3 or Common Criteria EAL4+ HSMs, with regional storage options. Threat detection includes software composition analysis, static binary analysis, Apple notarization scans, and DAST. Use requires a DigiCert ONE host environment, API key, client authentication certificate, and certificate password; two-factor authentication is required for all users. Pricing is on request, and a 30-day trial is listed.

SignServer is a server-side platform that centrally manages signing keys and digitally signs code, documents, and timestamps. One installation can serve several signing workflows, including containers, firmware, IoT, and DevOps use cases. It can connect to CI/CD pipelines, firmware build processes, document workflow engines, identity platforms, and other applications through standard interfaces. Community is available as a Docker container, Helm chart, source code, or GitHub release, and is also listed on SourceForge. Its interfaces include SOAP, HTTP, REST, and the SignClient command-line interface, though Community REST lacks some endpoints. Community is released under LGPL V2.1 or later and is intended for learning, testing, and prototyping rather than production. The maker says it lacks production capabilities such as audit, compliance, SLA, high availability, and security features. Enterprise adds professional support with an SLA, security updates, and maintenance. The Community plan is free; the Enterprise Cloud trial is free for 30 days through AWS or Azure marketplaces. The maker recommends Hardware Security Modules for signing-key storage.