Side by side

BT Global SIP vs Gradwell SIP Trunking

Both stand on sip trunking providers. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

BT Global SIP

Paid Web

BT Global SIP offers country-dependent voice connectivity, calling features, and a real-time management portal. It is not suitable for payment card traffic, and customers need to request pricing for their service configuration.

Visit BT Global SIP

Gradwell SIP Trunking

Paid Web

Gradwell SIP Trunking links existing business phone systems with the traditional network, including dedicated options for 3CX, Teams, and contact centres. Its £4/mo starting price is listed, but final costs depend on usage and requirements.

Visit Gradwell SIP Trunking

The facts

	BT Global SIP	Gradwell SIP Trunking
Free plan	Not published	No
Open source	Not published	Not published
Runs on	Web	Web
Lowest paid plan	Free or on request	Free or on request
Plans published	1	1
Maker	Not published	Not published
Website	international.bt.com	gradwell.com
On sip trunking providers	#11 of 27	#15 of 27

BT Global SIP: what it does well

Supports emergency calls, number porting, and DDI allocation.
Integrates with Teams, Zoom Meetings, and Webex.
Self-service portal is available 24/7 at no charge.
Outbound service is available in 73 countries.

What to know first

Full PSTN replacement is available in 24 countries.
Not PCI DSS compliant; do not use for payment card traffic.
Pricing is available on request.

Gradwell SIP Trunking: what it does well

Keeps existing PBX hardware in place
Offers 3CX-certified trunks and setup template
Connects Microsoft Teams through Direct Routing
Supports local, international, and non-geographical numbers
Provides 24/7/365 UK support

What to know first

Requires a suitable internet connection
Requires a compatible IP PBX
Number porting can take up to two weeks
Costs vary by requirements and usage

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