Sero
- Company typePrivate
- Founded2018
- HeadquartersCardiff, United Kingdom
- Headcount51–100
- GTM typeB2B
- OfferingServices
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.
Sero firmographics
Firmographics- 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
Sero industry classification
Industry- 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
Where Sero is headquartered
LocationHeadquarters
- HQ city
- Cardiff
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
Sero business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Marketing or Sales
Revenue model
- Retrofit Services: Energy efficiency and retrofit services delivered to local councils and housing associations under contract
- 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
Sero product offering
Product offeringCore 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
Companies that use Sero
Customer profileNamed customers3 records
Segments5 records
Ideal customer profiles2 records
Sero technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature1 record
Sero partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- SNG (Sovereign Network Group)coreSero 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
Sero competitors and assessment
Company assessmentDirect 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
Sero social profiles
Digital presenceSero financial estimates
Financial estimateRevenue estimate
Valuation estimate
Sero leadership team
Management profileNumber of profiles
Profiles1 record
Sero funding detail
Funding detailFunding overview
Funding rounds2 records
Investors2 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Sero M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Sero
What does Sero do?
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.
Is Sero a public or private company?
Sero is a private company. It is classified as venture growth investor backed and is currently operating.
When was Sero founded?
Sero was founded in 2018. It employs 51 to 100 people.
Where is Sero based?
Sero is headquartered in Cardiff, United Kingdom, in the Europe region.
How does Sero make money?
Two revenue lines are on record. Retrofit Services are the primary driver. The others are social Housing Retrofit Projects.
Who are Sero's main competitors?
Direct peers on record are RetrofitWorks, Sustainable Building Services UK and Geo Green Power. Broad incumbents are Equans UK & Ireland, E.ON UK, EDF Energy UK and Mitie. Daikin UK is listed as an emerging player. Others are Carbon Trust and Energy Saving Trust.
Does Sero have an API?
No public API is recorded for Sero.
What industry is Sero in?
Sero's product category is Social Housing Energy Retrofit Services. Its primary akta.pro industry code is EUAAAGAE, Biomass Heating Systems (Commercial/Institutional Boilers), with a secondary code of IMAIAAAM, Energy & Sustainability Management (Energy Audits/Optimization/Carbon & ESG Programs). Its NAICS code is 221330 and its SIC code is 3430.