Blink vs Zoiper

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.

Zoiper is a service-independent VoIP softphone for voice and video calls, messaging, presence, and fax. It runs on Android and iOS, as well as Windows, Mac, and Linux; use requires a computer or smartphone, an internet connection, and a VoIP provider or PBX. Listed calling tools include forwarding, attended and unattended transfers, auto-answer, recording, and SIP conferencing. Zoiper 5 PRO lists TLS, SRTP, and ZRTP encryption protocols for voice, video, and chat. Contact features include Outlook and macOS Address Book integration, LDAP contacts, CSV import, and click-to-dial CRM connections such as Vicidial, CallPro, Nimble, Freshdesk, and Salesforce. Zoiper describes a Banafo integration that transcribes VoIP call recordings and produces titles, summaries, classifications, and entity extraction. Zoiper 5 Free costs nothing for non-commercial use, with one account and two lines. Mobile team licensing costs €29.88 a year, billed annually, for teams of at least 10 users. Zoiper 5 PRO is $59.95, paid once, with a perpetual license per seat and operating system.