Stack, we are cloud telecoms

We provide crystal clear calls over the Internet to your smart device or cloud desk phone. Everything from Call forwarding, voicemail, transfer, hold music, call groups and much more.

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Phone Numbers

£3.99 Choose the perfect memorable number to promote your business in any town / city or across the entire UK
  • Over 100k numbers available
  • Forward to Mobile or Cloud Phone
  • Low call rates
  • 0800, 0845, 0330 and more

Cloud Phone

£9.99 A range of VoIP Phone System packages to suit any size of business. Perfect for start-ups and established SMEs.
  • Own local or national phone number
  • Get unlimited calls add-on
  • Web based control panel
  • Friendly UK support

SIP Trunking

£3.99 Thinking about ISDN? Save £1000's and get a more reliable service by switching to SIP Trunking!
  • Start with 4 and add more
  • Low call rates
  • 0330 number included
  • Friendly UK support
Call groups

Call groups allow you to handle multiple incoming calls at the same time. Place callers into a queue and answer them in the order they arrived.


When you’re on the phone or out of the office, get voicemail messages by e-mail, through our website or on your phone itself.

IVR Menus

Knowing exactly who a caller wishes to speak about before answering. With our IVR feature you can ask callers to choose options.

Shared Addressbook

The shared address book allows you to access common phone numbers as well as seeing the name of your callers when your phone rings.

Out of hours

Our time-based routing feature allows you to change what happens to incoming calls based on the time of day, perfect for out of hours or holidays.

Unlimited calls

Do you make a lot of calls? add on our unlimited call package for a flat rate fee per month and make all the UK calls you like.


Your own conference room where callers can dial in, enter a PIN and all speak together. This can save on huge call costs compared to other providers.

Music on hold

Upload your own hold music to play to callers this is great for on-hold marketing, festive periods and other uses.

Great expertise and reliable services. Great customer relations – no query is too big or small and an excellent response time on trouble shooting.


The engineer from Stack was very knowledgeable and helpfull in resolving our problems with the WASP bar coding system. Would not hesitate to use them again.


Great company they have helped my company with hosting and email for a long time now and I would highly recommend their services for the easy interface and great customer service.


We have worked with Stack for many years. Exceptional service, I would recommend this company to anyone.