Looking for a Zoiper alternative? Compare Spanvox
Zoiper is a popular, lightweight softphone that runs almost anywhere. Spanvox is a different thing: a white-label platform for providers that bridges to your PBX with no trunk, ships under your own developer accounts, and runs reliable push and the SBCs for you.
- No-trunk bridge
- Your own dev accounts
- BYOD SIP
- Free to try
Spanvox vs Zoiper, at a glance
| Spanvox | Zoiper | |
|---|---|---|
| Connect to your PBX | Registration bridge: no trunk or dialplan change | Softphone app; users enter SIP account details |
| Ships under your accounts | Your Apple & Google accounts, your APNs/FCM identity | Zoiper-branded app, white-label available |
| Push that wakes the app | Server-side registration + APNs/FCM, CallKit & ConnectionService | Push on supported plans and backends |
| BYOD SIP endpoints | Desk phones, ATAs and the app on one account | Softphone-app focused |
| Multi-tenant provisioning | Idempotent REST API, webhooks and CDRs | Provisioning add-ons |
| Platform & operations | Redundant nodes, GeoDNS, real-time observability, 24/7 NOC | You provide the backend |
| Pricing | Free sandbox, then per seat | Free and paid app tiers |
Reflects Spanvox’s capabilities and publicly available information about Zoiper as of 2026. Verify current details with each vendor.
A managed platform, not just an app
The bridge model
Spanvox registers to your PBX like a softphone, so there is no trunk, no dialplan edit and no firewall change. You turn on a service, not wire up a backend.
Your own dev accounts
Apps ship under your Apple Developer and Google Play accounts with your own APNs and FCM identity, so the app and its push are entirely yours.
Push, explained
Reliable ringing is server-side registration plus VoIP push through CallKit and ConnectionService, an architecture we describe, not just assert.
BYOD SIP
Register desk phones, ATAs and third-party SIP clients alongside the branded app, on the same account.
API-first, multi-tenant
An idempotent REST API with webhooks and CDRs to provision tenants and endpoints, built for automation, not clicks.
Carrier-grade & transparent
Redundant nodes, GeoDNS and a 24/7 NOC behind the platform, with a free sandbox and per-seat pricing instead of a demo wall.
Carrier-grade under the hood, watched around the clock
The parts that decide whether you can build a business on us: a globally redundant network, real security, and a team that never sleeps. Serious infrastructure for serious operators.
Globally redundant node pool
Registrations and calls run on a pool of redundant nodes across regions, on an anycast backbone. There is no single point of failure: if a node degrades, traffic shifts the same second.
GeoDNS routing & failover
GeoDNS steers every device to the nearest healthy node and reroutes automatically on failure, so latency stays low and outages stay invisible to your customers.
VoIP security, end to end
TLS and WSS signalling, SRTP and DTLS media, terminated on hardened Session Border Controllers. Credentials are encrypted at rest and never exposed to the device.
Toll-fraud protection
Per-endpoint concurrency caps, registration rate-limiting and automatic IP banning contain abuse before it ever reaches a bill, the number-one worry for any ITSP.
Observability as standard
A real-time view of every registration leg, live device, call and CDR with MOS scoring. It ships with the platform, not as a paid add-on.
24/7 NOC
A network operations centre watches the platform around the clock, with proactive response, so problems are caught and fixed before your customers ever feel them.
Zoiper alternative, answered
What is a good Zoiper alternative for a service provider?
If you want to ship a branded app to customers with reliable push, BYOD SIP and a multi-tenant API, bridged to your PBX as a managed service, Spanvox fits. Zoiper is a great softphone, but you point it at your own backend.
How is Spanvox different from Zoiper?
Zoiper is a softphone app users configure with SIP accounts. Spanvox is the platform behind a branded app: it bridges to your PBX with no trunk, runs server-side registration and push, supports BYOD endpoints, and provisions through an API.
Does Spanvox give reliable push out of the box?
Yes. Spanvox holds the upstream registration server-side and wakes the app with APNs/FCM through CallKit and ConnectionService, so calls ring even when the app is closed, without keeping a socket open.
Can I ship the app under my own brand and accounts?
Yes. The app is yours: your brand, your Apple and Google accounts, and your own APNs and FCM push identity.
Can I move from Zoiper to Spanvox?
Yes. Spanvox registers to your existing PBX, so you can run a branded app and BYOD endpoints in parallel and migrate users at your pace.
When might Zoiper be the better fit?
If you want a free, flexible softphone for individuals or to point at a SIP server you already run, Zoiper is excellent. Spanvox is for providers who want a branded app, reliable push, the bridge and a multi-tenant platform delivered as a service.
Try the alternative, free
Stand up a branded app and BYOD endpoints against your existing PBX, free, on one SIP domain. Move at your pace.