Google Voice for business vs Mitel Secure Cloud

Google Voice for business has no write-up on Specifiction yet; its figures are above.

Mitel Secure Cloud is a private managed communications service for large enterprises, including organizations in healthcare, financial services, and government. Its tools cover business calling, team messaging, video meetings, and contact-center channels including phone, chat, email, SMS, and social media. Calling and case-handling features include advanced routing, auto attendant, voicemail transcription, IVR, call recording, and supervisor tools; workforce management includes forecasting, skills-based scheduling, and intraday management. The unified communications suite includes presence management, persistent messaging, HD video conferencing, and mobile applications. Mitel describes dedicated, isolated customer instances with independent access controls and no shared infrastructure. It states that data storage, processing, and backups take place in Frankfurt, Germany, and cites ISO 27001, BSI C5, and GDPR requirements. Organizations can retain existing SIP providers, migrate in phases, and connect on-premises systems such as DECT wireless systems and SIP endpoints. Mitel describes support for organizations with 1,000 to 5,000 users and very large enterprises with 5,000 to 10,000+ users. It is available on Android, iOS, macOS, web, and Windows. Pricing is on request.