KeepSolid Sign

KeepSolid Sign is a high-security electronic signature solution designed for the 2026 enterprise landscape where data sovereignty and cross-device functionality are paramount. Built on a foundation of AES-256 encryption, the platform facilitates the secure signing of PDF documents across iOS, Android, macOS, Windows, and Web environments. Unlike many competitors that rely solely on web-based interfaces, KeepSolid Sign's technical architecture emphasizes local device synchronization, allowing users to draft and sign documents offline and sync once connectivity is restored. This makes it a preferred choice for field agents and mobile sales teams. The platform adheres strictly to the ESIGN Act and eIDAS standards, ensuring that all signatures are legally binding globally. Its market position in 2026 is defined by a robust 'flat-rate' pricing model for teams, contrasting with the 'per-document' or 'per-envelope' volume-based billing common in legacy providers. The system includes an automated audit trail (Electronic Evidence), which logs every action taken on a document—including IP addresses and timestamps—to provide a tamper-proof chain of custody suitable for legal proceedings.