Blink vs Siperb Mobile Softphone

Blink is a real-time communications client that uses SIP to connect with service providers, Bonjour on a local network and SIP2SIP. A SIP account from a provider is required. Voice and video features include Opus audio, H.264, VP8 and VP9 video, acoustic echo cancellation and ZRTP media encryption. Messaging supports MSRP chat, OTR encryption, SIMPLE presence and XCAP server storage. File transfers use MSRP and TLS and include progress reports and delivery confirmation. Screen sharing can run with audio, while conferences can combine participant management, VoIP, messaging, presence, file transfers and screen sharing. Blink supports multiple SIP accounts, iCloud syncing between computers and built-in account sign-up through SIP2SIP. It also lists OpenPGP messaging support and says it does not collect end-user data. The free plan is free and lists Linux, Mac and Windows downloads. Available features may differ by operating system and version, and some conferencing functions require a conference server. Blink was founded in 2002.

Siperb Mobile Softphone puts an office phone extension on an iOS or Android device and connects it to an existing PBX or SIP system. It supports audio and video calls, attended and blind transfers, three-way conferencing, DTMF, call history, CDR, and buddy presence. Its listed end-to-end encryption uses TLS and DTLS-SRTP. When the app is backgrounded, locked, or restarted, Siperb’s proxy uses Apple APNs or Google FCM to wake it and deliver calls. Mobile devices must use Proxy Registration Mode, which is also required for push notifications. The same account works across web, Windows, macOS, Linux, iOS, and Android, sharing contacts, settings, and call history. Supported PBXs include Asterisk, FreePBX, FreeSWITCH, and SIP systems that can provision an extension. Personal is free; Business costs £2.00 per month per domain user, and Business Pro costs £5.00 per month per domain user.