Zoiper is a popular SIP softphone that lets users make voice and video calls from desktops and mobile devices. Below is a curated list of 20 alternative telephony solutions—ranging from feature‑rich commercial softphones to open‑source clients—that can replace or complement Zoiper in your communications workflow.
Get targeted exposure with custom position pinning and highlighted placement.
Free SIP softphone for Windows, macOS, iOS, and Android that integrates tightly with the 3CX PBX, offering call transfer, video, and chat.
Enterprise‑grade softphone with advanced call handling, video conferencing, and CRM integration for Windows, macOS, iOS, and Android.
Open‑source SIP client supporting voice, video, and instant messaging on all major platforms, with strong encryption (ZRTP, TLS).
Lightweight Windows SIP softphone focused on high‑quality audio, with support for multiple accounts and call recording.
Free, open‑source video‑conferencing platform that also works as a SIP softphone via Jitsi Desktop, offering end‑to‑end encryption.
iOS and Android softphone that pairs with Grandstream IP phones and PBX, delivering HD voice, video, and presence.
Unified communications client for Cisco environments, providing SIP calling, video, instant messaging, and desktop sharing.
Collaboration hub with built‑in VoIP and PSTN calling capabilities, integrating with Microsoft 365 and third‑party SIP trunks.
All‑in‑one business phone app offering SIP‑based calling, video meetings, SMS, and integrations with CRM tools.
Cloud‑based phone system with a native softphone for desktop and mobile, supporting HD voice, video, and analytics.
AI‑enhanced cloud phone system with a sleek softphone client for Windows, macOS, iOS, and Android.
Business VoIP solution featuring a robust softphone with call routing, voicemail transcription, and CRM integration.
Unified communications platform offering a softphone app that supports SIP calling, video, and team messaging.
Enterprise softphone that integrates with Mitel’s cloud PBX, providing call control, video, and presence.
Feature‑rich softphone for Avaya environments, delivering voice, video, and instant messaging on desktop and mobile.
Softphone integration for Zoho CRM that enables click‑to‑call, call logging, and analytics directly from the CRM interface.
Decentralized, open‑source communication platform offering SIP‑compatible voice and video calls with strong privacy.
Android‑only SIP client with a simple UI, supporting multiple accounts, call recording, and push notifications.
A lighter, free edition of Zoiper itself, offering basic SIP calling, call logs, and contact management.
Primarily a low‑latency voice chat app, but with community SIP plugins it can serve as a softphone for gaming or small teams.