Aculab Cloud
Aculab Cloud provides APIs for businesses building applications for voice and video calls, messaging, and inbound or outbound fax.
What Aculab Cloud is
Aculab Cloud provides APIs for businesses building applications for voice and video calls, messaging, and inbound or outbound fax. It supports calls to telephone numbers and SIP addresses, while its WebRTC interface can add live calling to a web page. Listed capabilities include voice applications, live speaker detection, speech recognition, translation, text-to-speech, voice biometrics, SMS, MMS and fax. Speech recognition uses Google Speech-to-Text; text-to-speech supports Amazon Polly and Cepstral engines. Developers can use the REST API with Python, C#, VB, Java, PHP or other scripting languages. REST applications run on a web server the customer hosts. The UAS API supports Python, C#, VB, F# and C++, and runs in a User Application Server installed on the customer’s platform. The service runs on AWS; web services use HTTPS, UAS connections use SSL by default, and customers can encrypt media files with runtime-supplied keys. Accounts use a cloud region: Europe, USA-East or USA-West (beta). A free Trial includes $10 in credit for one month. New accounts start with a one-outbound-service-per-second limit.
Good
- Supports voice, video, messaging and fax APIs
- WebRTC can embed live calling in a web page
- REST and UAS APIs support several languages
- Free Trial includes $10 in credit
- Free developer support includes documentation and email support
Watch out
- Trial credit expires after one month
- New accounts start at one outbound service per second
- Outbound provider does not support premium-rate calls
- Production usage rates are shown in the Cloud Console
Who it suits
Aculab Cloud suits businesses and developers building communications applications through APIs rather than specialist telephony equipment. Its REST and UAS options may fit teams choosing between hosted web-server applications and a server installed on their platform.
Verdict
Aculab Cloud offers a broad API set for communications applications and a free Trial with limited services and time. Consider the outbound limit, hosting setup and usage billing details when assessing fit.
Plans and prices
From Aculab Cloud's own pricing page, checked 7 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| 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 |
| Premium | Priced on request | Like Production account · contact Aculab for details · Invoiced for usage; contact Aculab |
| Production | Priced on request | Full access to features · paid account kept in credit · outbound calls up to 75c per minute to any number · Pay-as-you-go; usage rates shown in the Cloud Console |
The facts
Each one read from Aculab Cloud's own pages, with the date it was checked.
What it does
- 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++.checked 7 Oct 2026
- Audience
- Aculab describes the product as a way for businesses to build communications applications using high-level APIs without specialist telephony equipment.checked 7 Oct 2026
- Communications
- The service supports calls to telephone numbers and SIP addresses, and its WebRTC interface can embed live calling in a web page.checked 7 Oct 2026
- Features
- Listed features include voice applications, live speaker detection, speech recognition, translation, text-to-speech, voice biometrics, WebRTC, messaging, and fax.checked 7 Oct 2026
- Hosting
- REST applications run on a web server you host, while UAS applications run in a User Application Server installed on your platform.checked 7 Oct 2026
- Messaging
- Aculab Cloud supports sending and receiving SMS and MMS messages, subject to account and local requirements.checked 7 Oct 2026
- Outbound limit
- New accounts start at a maximum of one outbound service per second, and users can ask support to increase this limit.checked 7 Oct 2026
- Premium-rate calls
- Aculab Cloud's outbound provider does not support calls to premium-rate numbers.checked 7 Oct 2026
- Product
- Aculab Cloud provides APIs for voice and video calls, messaging, and inbound and outbound fax.checked 7 Oct 2026
- Regions
- Accounts are assigned to a cloud region, and the documentation lists Europe, USA-East, and USA-West (beta).checked 7 Oct 2026
- 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.checked 7 Oct 2026
- Speech providers
- Speech recognition uses Google Speech-to-Text, and text-to-speech supports Amazon Polly and Cepstral engines.checked 7 Oct 2026
- 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.checked 7 Oct 2026
The company
- Founded
- 1978checked 28 Sep 2026
- Headquarters
- Milton Keynes, United Kingdomchecked 28 Sep 2026
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