Key timestamping features compared
Each feature is scored based on publicly available information — provider websites, documentation, and certification pages. Where data is not disclosed, the criterion is left unscored rather than guessed. Use the free buyer checklist below to ask providers directly about any undisclosed points.
RFC 3161 compliance
The RFC 3161 standard defines the Internet X.509 PKI Time-Stamp Protocol. Compliant providers issue timestamp tokens that can be independently verified, ensuring interoperability across systems and jurisdictions.
eIDAS qualification
Providers listed as Qualified Trust Service Providers (QTSPs) under eIDAS issue timestamps with legal presumption of accuracy across all EU member states. This is critical for regulated document workflows.
Archive timestamping
Archive timestamps (per CAdES-A / XAdES-A standards) extend the validity of signatures and timestamps beyond certificate expiration, enabling long-term validation for decades.
API access
REST or SOAP APIs allow automated timestamping within CI/CD pipelines, document management systems, and code signing workflows. Look for clear documentation, SDKs, and SLA guarantees.
Bulk timestamping
High-volume timestamping is essential for organizations processing thousands of documents, code artifacts, or transactions daily. Providers with bulk capabilities offer rate-optimized endpoints and volume pricing.
Cloud HSM integration
Hardware Security Module (HSM) integration ensures that timestamping keys are stored in tamper-resistant hardware, meeting the highest security requirements for qualified trust services.
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Provider Scoring Matrix
Compare timestamping providers across 20 criteria in 5 key categories
See full scoring matrix