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SPECIFICTION
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SIP.IO

sip.io

Free plan WebAPI
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Spec score 7.4 #15 of 52 in Voice APIs

What it is

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.

Spec sheet

What it does
SIP.IO describes itself as an edge-native programmable voice and cloud contact center platform for UCaaS, CCaaS, and Voice AI.Read 5 Oct 2026 · sip.io
Intended users
The documentation says SIP.IO is built for developers, BPOs and contact centers, and resellers or white-label operators.Read 5 Oct 2026 · sip.io
Security
The Trust Center says API, dashboard, and SIP signaling use TLS 1.2 or higher, while voice media uses SRTP and WebRTC uses DTLS-SRTP.Read 5 Oct 2026 · sip.io
AI features
SIP.IO offers voice AI agents with human escalation and searchable call transcripts and AI summaries, including the option to bring your own AI provider.Read 5 Oct 2026 · sip.io
Browser calling
SIP.IO lists an embedded softphone for browser-based WebRTC calling inside an app.Read 5 Oct 2026 · sip.io
Call recording
Call recording supports policy-driven recording, mid-call pause and resume, and an audited playback API.Read 5 Oct 2026 · sip.io
Certification
SIP.IO says it is ISO/IEC 27001 certified and that SOC 2 Type II is on the roadmap and has not been audited yet.Read 5 Oct 2026 · sip.io
Compliance limits
The Trust Center says HIPAA is not offered and SIP.IO has no Business Associate Agreement program.Read 5 Oct 2026 · sip.io
Inbound calling
YesRead 24 Sep 2026 · sip.io
Messaging
The platform lists SMS-to-email and inbound SMS webhooks, with webhook requests HMAC-signed.Read 5 Oct 2026 · sip.io
Microsoft Teams
SIP.IO lists fully managed, white-label Microsoft Teams Direct Routing, with tenant provisioning by API.Read 5 Oct 2026 · sip.io
Pricing limits
The published voice and number rates are labeled examples rather than the final rate card, and SIP.IO asks customers to contact it for current pricing.Read 5 Oct 2026 · sip.io
Security support
SIP.IO invites vulnerability reports by email and says it aims to send an initial response within three business days.Read 5 Oct 2026 · sip.io
Voice and contact center
Its listed capabilities include business phone service, SIP trunking, skills-based queues, agents, wallboard, and reporting.Read 5 Oct 2026 · sip.io

Plans and prices

Free tier Free Free trial credit · test phone number · full access to call flows, queues, and contact center · no credit card Read 5 Oct 2026 · sip.io
Usage-based Priced on request Pay per minute for voice and per number; current pricing by contacting SIP.IO No per-seat licenses · no minimums · month-to-month · published rates are examples only, not the final rate card Read 5 Oct 2026 · sip.io

Every SIP.IO plan and price →

Strong points and limits

Strong points

  • Free tier includes a test phone number
  • Browser softphone supports WebRTC calling
  • Call recording includes pause and resume
  • Voice AI can escalate calls to people

Limits

  • Current usage pricing requires contacting SIP.IO
  • Published voice and number rates are examples only
  • HIPAA and Business Associate Agreements are not offered
  • SOC 2 Type II has not been audited yet

Who it suits

SIP.IO is intended for developers, BPOs and contact centers, and resellers or white-label operators. It may suit teams building voice or contact center services that need APIs, browser calling, or call-flow tools.

Verdict

SIP.IO brings programmable voice, contact center functions, and AI call tools into one platform. Confirm current usage rates and compliance requirements before relying on it for a particular deployment.

Where Specifiction places it

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