Callr vs SIP.IO

Callr has no write-up on Specifiction yet; its figures are above.

SIP.IO is a programmable voice and cloud contact center platform for UCaaS, CCaaS, and Voice AI. Its listed services include business phone service and SIP trunking, alongside skills-based queues, agents, a wallboard, and reporting. Developers can embed a softphone in an app for browser-based WebRTC calls. Messaging includes SMS-to-email and inbound SMS webhooks, with webhook requests signed using HMAC. Call recording supports policy-based rules, pausing and resuming during a call, and playback through an audited API. Voice AI agents can escalate to a person; the platform also offers searchable call transcripts and AI summaries, with the option to use a customer's AI provider. SIP.IO lists managed, white-label Microsoft Teams Direct Routing with tenant setup by API. Its free tier includes trial credit, a test phone number, and access to call flows, queues, and contact center features without a credit card. Usage-based voice and number pricing is available by contacting SIP.IO; published rates are examples, not the final rate card. SIP.IO says it is ISO/IEC 27001 certified and that HIPAA and a Business Associate Agreement program are not offered.