Microsoft Azure Communication Services Call Automation vs Infobip Voice API

Microsoft Azure Communication Services Call Automation8.9Visit Infobip Voice API7.1Visit

Higher score Microsoft Azure Communication Services Call Automation #6 in Voice APIs 8.9/10 Paid ✓ 4 of 5 features Visit Azure

vs

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

• Microsoft Azure Communication Services Call Automation fits best

  Azure teams automating calls with event workflows

• Infobip Voice API fits best

  Teams wanting a long trial and broad voice tools

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature	Microsoft Azure Communication Services Call Automation 8.9/10 Visit ↗	Infobip Voice API 7.1/10 Visit ↗
At a glance
Editor score	8.9	7.1
Ranking	#6 in Voice APIs	#24 in Voice APIs
Best for	Azure teams automating calls with event workflows	Teams wanting a long trial and broad voice tools
Pricing model	Paid	Paid
Starting price	Not checked yet	60-day trial
Free plan	—	—
Free trial	—	60 days
Deployment	Cloud	Mobile, Cloud
Integrations	1 integrations	3 integrations
Features Microsoft Azure Communication Services Call Automation 4/5 · Infobip Voice API 5/5
Inbound calling	✓	✓
Outbound calling	✓	✓
Phone number support	✓	✓
SIP support	Not checked yet	✓ (best)
Call recording	✓	✓
Specs
Concurrent call limit	Not checked yet	Not checked yet
SDK languages	C#, Java, JavaScript, Python	JavaScript, Python, Java, Go, PHP, C#, Ruby
Our review
Pros	Inbound and outbound calling with webhook-driven event control Speech, DTMF, streaming, transcription, recording, and transfers SIP Direct Routing connects existing telephony infrastructure	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	API-only delivery requires development work Outbound concurrency defaults to 2 calls per phone number PSTN pricing varies by destination and region	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	Microsoft Azure Communication Services Call Automation is a server-side API and SDK offering for developers building programmable voice workflows over VoIP and the public switched telephone network. It supports inbound call answering,… 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

• Microsoft Azure Communication Services Call Automation — where it wins

  • Inbound and outbound calling with webhook-driven event control
  • Speech, DTMF, streaming, transcription, recording, and transfers
  • SIP Direct Routing connects existing telephony infrastructure

  Where it doesn't

  • API-only delivery requires development work
  • Outbound concurrency defaults to 2 calls per phone number
  • PSTN pricing varies by destination and region

• 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

• Microsoft Azure Communication Services Call Automation8.9/10 · Paid

  A capable Azure voice API for event-driven call automation with usage-based pricing.

  Visit AzureFull 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 →