Side by side

Callr vs SIP.IO

Callr

7.6#2 in voice apisFrom €599 a month

AndroidiOSWebAPI

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SIP.IO

6.3#13 in voice apisFree plan

Free planWebAPI

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Callr plans

Professional€599 a month
EnterprisePriced on request

SIP.IO plans

Free tierFree
Usage-basedPriced on request

Pick Callr if…

You want what its maker publishes above — check its page for the details.

Pick SIP.IO if…

SIP.IO is aimed at developers, BPOs and contact centers, and resellers or white-label operators. It may suit teams needing programmable calling, contact center functions, or voice AI with human escalation.

Charts they share

Voice APIs