Sero

What Sero does

Sero Technologies is a Cardiff-based energy technology company founded around 2018 that develops digital tools and energy management systems for low-carbon solutions in UK residential housing. The company operates at the intersection of home comfort, construction, and energy, with its core proposition centered on coordinating large-scale energy retrofits — including ventilation upgrades, insulation, and air source heat pump installations — for social housing landlords, housing associations, and local councils across South Wales, Southwest England, Southern England, and London.

The company's primary offering is Retrofit Co-ordination Services, a project-based service managing complex multi-property retrofit programmes. Sero has secured preferred retrofit coordinator status under government funding schemes, most notably winning a £36.5 million allocation under the Warm Homes Social Housing Fund Wave 3 with SNG (Sovereign Network Group) to retrofit 4,500 homes, building on a prior Wave 2.1 engagement covering 1,000 homes. Sero is currently operating in up to 2,500 homes with a contracted pipeline of 10,000 homes.

Sero's go-to-market is enterprise field sales direct to public sector and social housing clients, with revenue generated primarily through professional services and project-based contracts funded via government retrofit programmes. The company has raised approximately £11.5 million across multiple rounds from institutional investors including Legal & General, Hodge Bank, and the Cardiff Capital Region's Innovation Investment Capital fund, with deployment capital directed toward scaling home coverage, extending services to additional housing associations and councils, and further developing its proprietary digital toolset.

Name

Sero

Legal name

Sero Technologies

Website

https://sero.life

Company type

Private

Founded year

2018

Operating status

Operating

Headcount range

51–100 employees

Ownership category

akta.pro rank

Product category

Social Housing Energy Retrofit Services

NAICS

Steam and Air-Conditioning Supply (221330)

SIC

Heating Equip, Except Elec & Warm Air; & Plumbing Fixtures (3430), Auto Controls For Regulating Residential & Comml Environments (3822)

akta.pro primary industry

Biomass Heating Systems (Commercial/Institutional Boilers) (EUAAAGAE)

akta.pro secondary industries

Energy & Sustainability Management (Energy Audits/Optimization/Carbon & ESG Programs) (IMAIAAAM), Onsite Low-Carbon Heat & CHP (Electrified CHP, Fuel Cells, Renewable CHP) (EUABAJAI)

Keywords

• Energy retrofit services
• Social housing decarbonisation
• Low-carbon housing solutions
• Residential energy efficiency
• Net-zero retrofit coordination

Headquarters

HQ city

Cardiff

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales

Revenue model

1. Retrofit Services: Energy efficiency and retrofit services delivered to local councils and housing associations under contract
2. Social Housing Retrofit Projects: Large-scale retrofit coordination projects funded through government schemes such as Warm Homes Social Housing Fund, with £36.5 million secured for Wave 3 project covering 4,500 homes

Go-to-market motion1 record

Distribution channels2 records

Marketing channels2 records

Core offering

Sero provides energy efficiency and retrofit coordination services to social housing landlords, housing associations, and local councils, covering ventilation, insulation, and air source heat pump installations across UK residential properties. The company complements these services with proprietary digital tools and energy management systems specifically developed to help landlords, builders, and homeowners reduce emissions and improve energy efficiency.

Differentiator

Problem solved

Functional benefit

Products and services

• Retrofit Co-ordination Services Comprehensive retrofit coordination for social housing projects covering ventilation, insulation, and air source heat pump installations across multiple properties. Delivered to housing associations, local councils, and social housing landlords, typically funded through UK government schemes such as the Warm Homes Social Housing Fund.
• Energy Efficiency and Retrofit Services

Quantifiable outcome

• Reduced energy bills for residents through retrofit measures including insulation, ventilation, and heat pump installations
• +2 more outcomes

Named customers3 records

Segments5 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

One partnership is on record.

• SNG (Sovereign Network Group)coreStrategic or Co-development Partner · 9 January 2026Sero and SNG have extended their partnership to deliver Retrofit Co-ordination Services for SNG's Wave 3 Warm Homes Social Housing Fund Project, securing £36.5 million in funding to retrofit 4,500 homes. Building on their successful Wave 2.1 collaboration covering 1,000 homes, this is their second large-scale retrofit project together.

Scale indicators6 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• RetrofitWorks: UK-based social housing retrofit coordinator delivering whole-house retrofit programmes for housing associations and councils under government schemes such as SHDF/Warm Homes. Closely comparable to Sero in target customer, funding source, and delivery model.
• Sustainable Building Services UK: UK-based retrofit contractor specialising in insulation, ventilation, and heat pump installations for social housing landlords. Direct competitor for Warm Homes-funded retrofit projects in similar geographies to Sero.
• Geo Green Power: UK renewable energy installer specialising in heat pumps, solar, and ground-source systems for residential and small commercial customers. Comparable to Sero's heat pump retrofit offering at smaller scale and with a less exclusive focus on social housing.

Broad incumbents

• Equans UK & Ireland: Large energy services and facilities management provider with a UK retrofit and decarbonisation practice serving social housing landlords and public sector clients. Competes with Sero for the same government-funded retrofit schemes at greater scale but with less residential specialisation.
• E.ON UK: Major UK energy supplier and home energy services provider with programmes covering insulation, heat pumps, and solar for residential and social housing customers. Overlaps with Sero on residential retrofit and energy management, though E.ON operates across a much broader energy portfolio.
• EDF Energy UK: UK energy utility with residential energy efficiency and heat pump installation services targeting homeowners and social housing. Competes with Sero for retrofit demand in the UK residential market, particularly under government-backed decarbonisation programmes.
• Mitie: UK facilities management and energy services provider with a decarbonisation practice serving public sector and housing clients. Competes with Sero for large-scale social housing retrofit contracts as a broad incumbent with greater capital and operational scale.

Emerging players

• Daikin UK: UK arm of a global heat pump manufacturer with growing residential and social housing presence, including partnerships on government-funded retrofit schemes. Adjacent to Sero's air source heat pump installation work as both equipment supplier and emerging service provider.

Others

• Carbon Trust: UK-based advisory organisation helping organisations measure and reduce carbon emissions, with significant involvement in residential retrofit advisory work and government scheme design. Functions more as an enabler/advisor than a direct retrofit contractor but operates in the same net-zero housing ecosystem.
• Energy Saving Trust: UK non-profit providing energy efficiency advice and programme administration for government schemes targeting homeowners and social housing. Adjacent player in the same retrofit funding ecosystem that Sero serves as a delivery contractor.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights5 records

Customer concentration

• Xx.com/Sero_group

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds2 records

Investors2 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Sero