Callcentric offers free inbound calling for US/Canada numbers. Looking for other free‑inbound VoIP services? Below are 20 alternatives that let you receive calls at no cost (or via a free tier/trial).
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Free US/Canada inbound numbers with voicemail, SMS, and integration with Android/iOS apps.
Provides a free US/Canada phone number for unlimited inbound calls and texts on mobile or desktop.
Free inbound calls on a US number; optional paid plans add outbound minutes and data.
German‑based provider with a free plan that includes a German inbound number and SIP credentials.
Free US/Canada number for inbound calls and texts; works via mobile app and desktop client.
Free inbound calling on a US number with SIP support; includes voicemail and call forwarding.
Open‑source SIP softphone that can register to any free inbound SIP provider (e.g., Linphone’s own free service).
Free, open‑source video‑and‑voice conferencing platform; can be used for inbound VoIP calls via Jitsi SIP gateway.
On‑premise PBX with a free tier; supports inbound calls on a SIP trunk (free inbound if the trunk provider offers it).
30‑day free trial that includes a US inbound number, call handling, and mobile/desktop apps.
14‑day trial with a free inbound US number, unlimited inbound calls, and analytics dashboard.
Offers a 30‑day free trial with a US inbound number and basic call routing features.
30‑day trial that provides a free inbound number, call forwarding, and voicemail.
Provides a free US inbound number with SIP credentials; ideal for small businesses.
Free 30‑day trial with a US inbound number, call handling, and mobile apps.
Free plan includes one inbound US number, call routing, and basic analytics.
Free tier offers a US inbound number, call queues, and basic reporting.
Free CRM includes a VoIP inbound number (US/UK) with call logging and click‑to‑call.