BT Business
Behind brilliant things, the UK's incumbent provider of business connectivity, comms and security.
- Connectivity & Broadband: offered
- Telephony, VoIP & Mobile: offered
- Managed IT & Cyber Security: offered
- Business Energy: not offered
Reviewed June 2026
BT Business is the commercial and public-sector arm of BT Group, the UK's incumbent telecoms operator and the company that owns both the Openreach access network and the EE mobile network. Its B2B portfolio is genuinely broad: fixed connectivity (broadband, full fibre and BTnet leased lines), telephony and mobile (Cloud Voice, Microsoft Teams calling and EE-powered business mobile), plus managed networking, IT and cyber security. Customers range from sole traders to major enterprises and government bodies. It does not sell business energy.
Our verdict
BT Business scores 74/100 (Very good) and ranks #6 overall. Mid-market to enterprise and public-sector buyers who want a single, financially-secure incumbent to handle nationwide connectivity, hosted voice, EE mobile and managed security with 24/7 support. Best suited to organisations that put network reach and resilience above lowest price.
Strengths
- UK incumbent with unmatched network reach via Openreach (fixed) and EE (mobile, repeatedly rated UK's best network)
- Very broad one-stop portfolio: connectivity, hosted voice/UC, mobile and managed security under one supplier
- Strong enterprise-grade security capability, thousands of security experts and large-scale threat intelligence, plus managed SD-WAN/SASE with Fortinet, Palo Alto, Cisco
- Financial stability and longevity as part of FTSE-listed BT Group with 180+ years of heritage
- 24/7 UK-based support and managed-service options suitable for mission-critical deployments
Watch-outs
- Mixed customer-service reputation, Trustpilot ~3.7 with a high (~34%) share of 1-star reviews, common complaints about contact/support experience
- Premium pricing and rigidity versus smaller challenger providers; can be expensive for price-sensitive small businesses
- Large-corporate bureaucracy can mean slower, less personal service for micro/SME customers
- Does not offer business energy, so cannot be a single supplier for utilities-bundling buyers
- Ongoing PSTN/copper switch-off (target 2027) forces migration that some legacy customers find disruptive
How it scores
Services
Connectivity & Broadband
- Business broadband (copper/part-fibre)
- Full fibre (FTTP) broadband
- BTnet dedicated leased lines / Dedicated Internet Access
- Managed SD-WAN
- Managed SASE / SSE
- WiFi and networking
- Global connectivity
Telephony, VoIP & Mobile
- Cloud Voice (hosted VoIP)
- Cloud Voice Express (small-business hosted VoIP)
- Cloud Work unified communications
- Microsoft Teams calling integration
- Business phone lines / digital line transition (PSTN switch-off)
- Business mobile and SIM-only plans on the EE network
- 5G business mobile
Managed IT & Cyber Security
- Managed network security
- Cloud security / managed controls
- Managed SASE
- Threat intelligence and 24/7 security operations
- Managed IT and networking services
- Cloud connectivity services
Accreditations & partners
Accreditations
- Ofcom-regulated UK communications provider
- Parent BT Group plc is London Stock Exchange listed (FTSE)
Key partners
- Microsoft
- Cisco
- Fortinet
- Palo Alto Networks
- VMware (Broadcom)
- EE (BT Group mobile network)
- Openreach (BT Group access network)