Gradwell SIP Trunking review
A low-cost SIP trunking option for 3CX and Teams deployments with flexible usage models.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Gradwell SIP Trunking connects business phone systems and PBXs to the public telephone network over broadband internet. It is aimed at UK businesses using 3CX, Microsoft Teams or other IP PBX environments, with options that extend from standard business telephony to contact-centre deployments requiring higher call-per-second and channel capacity. The service is provided by Gradwell Communications Limited, a Bath-based vendor founded in 1998, and supports web-based channel management.
Pricing is straightforward at the entry level: the SIP Trunks plan starts from £4 per month, billed monthly. According to the vendor’s pricing information, customers can choose between pay-as-you-go calling and blended-minute bundle options, while final pricing varies according to requirements and usage. That structure suits businesses that want a low starting cost or need to align calling charges with a particular traffic pattern. The plan combines the core trunking service with options for number porting and local, non-geographic and international numbering.
Platform fit is the main reason to consider Gradwell. Its 3CX-certified SIP trunking supports 3CX users, while Microsoft Teams Direct Routing connects the service to Teams-based telephony. IP PBX support, high-volume SIP trunks, multi-carrier cloud deployment and a centralized SIP channel management portal broaden its use beyond a basic trunk. Businesses choosing Gradwell should value this 3CX and Teams alignment, flexible numbering and usage-based options. Organizations needing a wider verified integration ecosystem or a different set of telephony capabilities should compare alternatives before committing.
Gradwell SIP Trunking pros and cons
- Where it wins
- £4-per-month starting price with pay-as-you-go options
- 3CX certification and Microsoft Teams Direct Routing
- Number porting, flexible numbering and centralized channel management
- Where it doesn't
- Pricing varies with requirements and usage
- Integration focus centers on 3CX, Teams and IP PBX systems
- Advanced deployments may require high-volume trunk planning
Gradwell SIP Trunking fact sheet, pricing and score →
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