SIP.IO vs Infobip Voice API

SIP.IO7.7Visit Infobip Voice API7.1Visit

Higher score SIP.IO #18 in Voice APIs 7.7/10 Free plan + paid ✓ 5 of 5 features Visit SIP.IO

vs

Infobip Voice API #24 in Voice APIs 7.1/10 60-day trial Free trial✓ 5 of 5 features Visit Infobip

• SIP.IO fits best

  Budget-conscious programmable voice builders

• Infobip Voice API fits best

  Teams wanting a long trial and broad voice tools

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Side by side

Feature	SIP.IO 7.7/10 Visit ↗	Infobip Voice API 7.1/10 Visit ↗
At a glance
Editor score	7.7	7.1
Ranking	#18 in Voice APIs	#24 in Voice APIs
Best for	Budget-conscious programmable voice builders	Teams wanting a long trial and broad voice tools
Pricing model	Free plan + paid	Paid
Starting price	Not checked yet	60-day trial
Free plan	Not checked yet	—
Free trial	—	60 days
Deployment	Cloud	Mobile, Cloud
Platforms	Web	iOS, Android, Web
Features SIP.IO 5/5 · Infobip Voice API 5/5
Inbound calling	✓	✓
Outbound calling	✓	✓
Phone number support	✓	✓
SIP support	✓	✓
Call recording	✓	✓
Specs
Concurrent call limit	Not checked yet	Not checked yet
SDK languages	Not checked yet	JavaScript, Python, Java, Go, PHP, C#, Ruby
Our review
Pros	Free plan includes programmable inbound and outbound calling Visual and JSON call flows support IVR and routing logic SIP, BYOC, queues, recording, webhooks, and AI handoff	Supports inbound and outbound calls across PSTN, WebRTC, and SIP Combines IVR, conferencing, recording, streaming, transcription, and TTS Offers API, web, iOS, and Android access with multiple SDK languages
Cons	Paid rates are published as examples and require contacting SIP.IO SDKs are on the roadmap rather than presented as current platform coverage Its wide feature set may exceed the needs of simple voice projects	No free plan is available after the trial Pay-as-you-go pricing varies by country and currency The broad feature set may exceed basic calling requirements
Our verdict	SIP.IO is a programmable voice and cloud contact center platform for developers, contact centers, BPOs, and white-label operators. It supports inbound and outbound calling through HTTP APIs and a visual flow builder, with IVRs, voicemail,… Read the review →	Infobip Voice API provides programmable communications for businesses and developers building voice applications. It supports inbound and outbound calls across PSTN, WebRTC, and SIP, with voice-number provisioning, IVR, click-to-call,… Read the review →

Strengths and trade-offs

• SIP.IO — where it wins

  • Free plan includes programmable inbound and outbound calling
  • Visual and JSON call flows support IVR and routing logic
  • SIP, BYOC, queues, recording, webhooks, and AI handoff

  Where it doesn't

  • Paid rates are published as examples and require contacting SIP.IO
  • SDKs are on the roadmap rather than presented as current platform coverage
  • Its wide feature set may exceed the needs of simple voice projects

• Infobip Voice API — where it wins

  • Supports inbound and outbound calls across PSTN, WebRTC, and SIP
  • Combines IVR, conferencing, recording, streaming, transcription, and TTS
  • Offers API, web, iOS, and Android access with multiple SDK languages

  Where it doesn't

  • No free plan is available after the trial
  • Pay-as-you-go pricing varies by country and currency
  • The broad feature set may exceed basic calling requirements

• SIP.IO7.7/10 · Free plan + paid

  A freemium voice platform spanning call flows, contact centers, SIP, and AI handoff.

  Visit SIP.IOFull verdict →
• Infobip Voice API7.1/10 · 60-day trial

  A broad voice API suite with a 60-day trial and pay-as-you-go pricing.

  Visit InfobipFull verdict →