Top 10: Sustainable Telcos

For global telecommunications sector, sustainability is a core driver of capital efficiency and brand resilience.

Investors and regulators are demanding evidence that growth can be achieved with a smaller environmental footprint.

With energy costs volatile and regulatory pressure on Scope 3 disclosures intensifying, the leaders in our list are those who have successfully decoupled network growth from carbon output.

From solar-powered towers in Africa to liquid-cooled data centres in Asia, these 10 companies represent the absolute vanguard of green connectivity, proving that environmental stewardship should be inseparable from technical excellence.

10. Singtel

Location: Singapore, Asia
CEO: Yuen Kuan Moon
Founded: 1879

Singtel has established itself as the sustainability lighthouse for the Asia-Pacific region.

One way it has done so is through its aggressive decarbonisation of energy-intensive infrastructure. The group is at the forefront of liquid-cooling technology for data centres, a critical innovation given the tropical climates of its primary markets.

By integrating AI-driven network optimisation, Singtel has significantly reduced its power consumption across its 5G footprint. Its commitment to science-based targets and transparency makes it a regional leader in environmental accountability.

9. Verizon

Location: New York, US
CEO: Dan Schulman
Founded: 2000

A global heavyweight in green financing, Verizon has issued nearly US$6bn in green bonds to fund its transition.

These funds are primarily directed towards large-scale virtual power purchase agreements, making Verizon a top corporate buyer of renewable energy in the US.

Beyond procurement, the company is investing heavily in fleet electrification and building efficiency.

Its scale allows it to influence the entire North American supply chain, pushing vendors to adopt more rigorous sustainability standards and circular practices.

8. Orange

Location: Paris, France
CEO: Christel Heydemann
Founded: 1988

Orange is a pioneer in bridging the gap between digital expansion and environmental responsibility, especially across its vast footprint in Africa and the Middle East.

The company has solarised over 10,000 regional towers, reducing reliance on diesel generators and improving energy security. In Europe, its "Orange Centre" programme leads the way in device refurbishing and recycling.

By focusing on both carbon reduction and digital inclusion, Orange proves that sustainable operations can drive growth in even the most challenging markets.

7. Vodafone

Location: Berkshire, England
CEO: Margherita Della Valle
Founded: 1984

Global e-waste recovery and handset circularity are core priorities for Vodafone.

Its 2026 milestones include the expansion of its "one-for-one" device recycling scheme and a significant increase in the use of refurbished equipment within its own network infrastructure.

The group has already achieved 100% renewable electricity across its European operations and is now aggressively tackling its Scope 3 emissions.

Its leadership in circular economy principles sets a high bar for competitors looking to reduce their material footprint.

6. BT Group

Location: London, England
CEO: Allison Kirkby
Founded: 1846

BT Group is delivering massive energy reductions through an aggressive legacy infrastructure retirement programme.

By accelerating the sunset of copper networks in favour of full-fibre, the company is moving towards a network that is up to 85% more energy-efficient.

Furthermore, BT is operating one of the UK’s largest electric vehicle fleets, significantly lowering its operational transport emissions.

Its focus on infrastructure modernisation serves as a blueprint for how telcos can transform into lean and green digital leaders.

5. Swisscom

Location: Bern, Switzerland
CEO: Christoph Aeschlimann
Founded: 1998

Holding top-tier ratings from both MSCI and EcoVadis, Swisscom is a benchmark for consistent ESG excellence.

The operator has been running its entire Swiss network on 100% renewable energy for over a decade, focusing now on achieving a completely climate-neutral value chain.

Uniquely, Swisscom has fully integrated sustainability into its corporate governance, linking 100% of executive compensation directly to the achievement of environmental targets.

Its commitment to ethical digitisation and electronic waste reduction confirms its status as a European leader.

4. KDDI

Location: Tokyo, Japan
CEO: Hiromichi Matsuda
Founded: 1984

Japan’s ESG frontrunner is KDDI, which consistently appears on the CDP A List for climate action.

The company is committed to achieving carbon neutrality by 2030, a goal supported by its heavy investment in solar power and wind energy projects.

KDDI is also a leader in disaster-resilient, sustainable infrastructure, developing mobile base stations that can operate independently during power outages.

Its focus on long-term stability and environmental stewardship makes it a key player in the global field.

3. Telefónica

Location: Madrid, Spain
CEO: Marc Murtra Millar
Founded: 1924

Telefónica is a leader in B2B carbon-enablement through its proprietary "Eco Smart" digital solutions, which help corporate clients track and reduce their own emissions.

This focus on the "handprint" effect, where a telco enables broader societal decarbonisation, complements its own operational achievements.

The company has already significantly reduced its energy consumption despite massive data growth, largely by migrating to energy-efficient 5G and fibre technologies.

Telefónica’s focus on the circular economy make it a perennial leader in global sustainability.

2. TELUS

Location: Vancouver, Canada
CEO: Darren Entwistle
Founded: 1990

Adopting a nature-accretive strategy that goes far beyond traditional carbon offsets, TELUS has redefined what it means to be a sustainable telco.

The company has planted over 25 million trees and invested heavily in restoration-first operations, making it a global biodiversity champion in the 2026 rankings.

Its commitment to social purpose is integrated into the core business model, with significant investments in healthcare and agriculture technology that drive efficiency and reduce environmental impact.

By migrating 99% of its legacy network to fibre, TELUS has achieved dramatic energy savings while maintaining industry-leading ESG governance standards.

1. Deutsche Telekom

Location: Bonn, Germany
CEO: Timotheus Höttges
Founded: 1995

Deutsche Telekom takes the top spot in sustainable telcos, having become the first DAX 40 company to reach Group-wide Net Zero for Scope 1 and 2 emissions.

This historic achievement is the result of a decade-long transition to 100% renewable electricity and the implementation of its proprietary Telco Circularity Score, which measures the lifecycle of every piece of hardware.

The telco giant has successfully decoupled its massive network expansion from its carbon footprint, showing how scale is not an obstacle to sustainability.

Its leadership in green innovation, from AI-managed power grids to sustainable supply chain management, makes it the green connectivity leader in this Top 10.