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SPECIFICTION
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Aculab Cloud

aculab.com

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What it is

Aculab Cloud provides APIs for building applications that handle voice and video calls, messaging, and inbound or outbound fax. It supports calls to telephone numbers and SIP addresses, and its WebRTC interface can place live calling in a web page. Listed capabilities include live speaker detection, speech recognition, translation, text-to-speech, voice biometrics, SMS, and MMS. The REST API works with Python, C#, VB, Java, PHP, or other scripting languages; REST applications run on a web server you host. The UAS API supports Python, C#, VB, F#, and C++, with applications running in a User Application Server installed on your platform. Speech recognition uses Google Speech-to-Text, while text-to-speech supports Amazon Polly and Cepstral engines. Aculab Cloud runs on AWS; web services use HTTPS, UAS connections use SSL by default, and customers can encrypt media files with keys supplied at runtime. Accounts are assigned to Europe, USA-East, or USA-West (beta). The free Trial includes $10 in credit for one month. Production is pay-as-you-go, with rates shown in the Cloud Console; Premium usage is invoiced and requires contacting Aculab.

Spec sheet

Product
Aculab Cloud provides APIs for voice and video calls, messaging, and inbound and outbound fax.Read 7 Oct 2026 · docs.cloud.aculab.com
Audience
Aculab describes the product as a way for businesses to build communications applications using high-level APIs without specialist telephony equipment.Read 7 Oct 2026 · aculab.com
Security
Aculab Cloud runs on AWS; its web services are accessible over HTTPS, UAS connections use SSL by default, and customers can encrypt media files with keys supplied at runtime.Read 7 Oct 2026 · aculab.com
Support
Free developer support includes documentation, quickstart guides, email support, and bug reporting; paid contracts can offer guaranteed response times and 24×7 emergency support.Read 7 Oct 2026 · aculab.com
Headquarters
Milton Keynes, United KingdomRead 28 Sep 2026 · aculab.com
Founded
1978Read 28 Sep 2026 · aculab.com
APIs and languages
The REST API can be used with Python, C#, VB, Java, PHP, or other scripting languages, and the UAS API supports Python, C#, VB, F#, and C++.Read 7 Oct 2026 · aculab.com
Communications
The service supports calls to telephone numbers and SIP addresses, and its WebRTC interface can embed live calling in a web page.Read 7 Oct 2026 · aculab.com
Features
Listed features include voice applications, live speaker detection, speech recognition, translation, text-to-speech, voice biometrics, WebRTC, messaging, and fax.Read 7 Oct 2026 · aculab.com
Hosting
REST applications run on a web server you host, while UAS applications run in a User Application Server installed on your platform.Read 7 Oct 2026 · aculab.com
Messaging
Aculab Cloud supports sending and receiving SMS and MMS messages, subject to account and local requirements.Read 7 Oct 2026 · aculab.com
Outbound limit
New accounts start at a maximum of one outbound service per second, and users can ask support to increase this limit.Read 7 Oct 2026 · aculab.com
Premium-rate calls
Aculab Cloud's outbound provider does not support calls to premium-rate numbers.Read 7 Oct 2026 · aculab.com
Regions
Accounts are assigned to a cloud region, and the documentation lists Europe, USA-East, and USA-West (beta).Read 7 Oct 2026 · aculab.com
Speech providers
Speech recognition uses Google Speech-to-Text, and text-to-speech supports Amazon Polly and Cepstral engines.Read 7 Oct 2026 · aculab.com

Plans and prices

Trial Free $10 free credit · expires after 1 month · 5 inbound and 5 outbound services · calls up to 23c per minute to your validated number Read 7 Oct 2026 · aculab.com
Premium Priced on request Invoiced for usage; contact Aculab Like Production account · contact Aculab for details Read 7 Oct 2026 · aculab.com
Production Priced on request Pay-as-you-go; usage rates shown in the Cloud Console Full access to features · paid account kept in credit · outbound calls up to 75c per minute to any number Read 7 Oct 2026 · aculab.com

Every Aculab Cloud plan and price →

Strong points and limits

Strong points

  • Supports voice, video, messaging, and fax.
  • WebRTC can embed live calling in a web page.
  • Offers REST and UAS APIs in several languages.
  • Free Trial includes $10 in credit for one month.
  • Free developer support includes documentation and email support.

Limits

  • New accounts start at one outbound service per second.
  • Outbound calls to premium-rate numbers are unsupported.
  • Production usage rates are shown in the Cloud Console.
  • USA-West is listed as beta.

Who it suits

Aculab Cloud suits businesses building communications applications with APIs rather than specialist telephony equipment. It also fits developers who can host REST applications or install a User Application Server.

Verdict

Aculab Cloud combines communications APIs with several application hosting approaches and speech capabilities. The trial has defined service limits; production pricing depends on usage rates shown in the console.

Where Specifiction places it

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