Halcyon vs Mizu WebPhone
Halcyon
halcyon.tel
Mizu WebPhone
mizu-voip.comSide by side
| Figure | Halcyon | Mizu WebPhone |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Web | — | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | Yes | Yes |
| iOS | — | Yes |
| Android | Yes | Yes |
| API | — | Yes |
| Self-hosted | — | Yes |
| Plans published | 1 | 3 |
| Spec score · Softphone Software | 7.8 (#15) | 7.9 (#11) |
| Product | Halcyon is a low-latency Android softphone built on PJSIP and integrated with Android Telecom. | Mizu WebPhone is a SIP standards based VoIP client that can be embedded in a webpage or used as a JavaScript SIP library. |
Plans
Mizu WebPhone
- Basic$990, paid once
- Advanced$1,990, paid once
- Gold$3,900, paid once
In their own words
Halcyon
Halcyon is a free, pre-1.0 Android softphone built on PJSIP and integrated with Android Telecom. It registers with a PBX over UDP, TCP, or TLS, advertises RFC 8599 push parameters, and supports several SIP identities with an account selected for each call. When server-side push is configured, the registrar sends a data-only FCM message before an incoming INVITE to wake the device. Without push, Halcyon uses a foreground SIP service with permanent TLS registration and the associated battery cost. Its Android ConnectionService handles tel: and sip: calls, including from the lock screen, while Telecom-native routing supports Bluetooth headsets and Android Auto. Listed audio codecs are Opus, G.722, AMR-WB, and G.729; video codecs include VP8, VP9, and arm64 MediaCodec H.264. Media uses SRTP encryption, with ZRTP on the roadmap. Android 8.0 or newer is required; signed APKs are available from GitHub Releases.
Mizu WebPhone
Mizu WebPhone has no write-up on Specifiction yet; its figures are above.