Tem-Energy
Tem-Energy operates an AI-native energy transaction infrastructure, using its Rosso engine to match UK renewable generators directly with business customers via the RED utility platform, processing $300M+ in annualised gross transaction value across 6,000+ sites.
- Company typePrivate
- Founded2021
- HeadquartersLondon, United Kingdom
- Headcount101–250
- GTM typeB2B
- OfferingSoftware
What Tem-Energy does
Tem-Energy Limited ("tem") is a London-headquartered, venture-backed scaleup founded in 2021 by Joe McDonald, Bartlomiej Szostek, Jason Stocks, and Ross Mackay in the wake of the UK energy crisis. The company operates an AI-native energy transaction infrastructure designed to replace the wholesale-market energy trading layer with direct, AI-driven matching between renewable generators and business electricity customers. Its core technology stack comprises two tightly coupled proprietary systems: Rosso, an AI-powered transaction engine that uses machine learning and large language models to forecast supply and demand, optimise generator-to-business matching, and remove 5-6 layers of intermediaries; and RED™, a customer-facing modern utility platform that delivers line-by-line transparent billing, half-hourly meter data reconciliation, hourly usage insights, and onboarding from quote to live in minutes. Tem reports 6,000+ UK sites running on RED, more than 3,000 business customers, and over 22,000 renewable generators in its network.
Tem monetises as a transaction-taker on the energy it processes, capturing the spread between what generators receive (~10% more per MWh than wholesale) and what businesses pay (~30% lower than traditional utility pricing), supplemented by per-kWh service fees on RED contracts. The platform operates through an Ofgem-licensed supply partner (Versa Energy), which delivers regulatory compliance and Energy Ombudsman protection while tem itself administers customer contracts. Distribution is hybrid: direct self-serve via the tem web app for SMBs, inside and field sales for mid-market and enterprise, and a growing channel of energy brokers and consultants using RED on behalf of clients. As of February 2026 the company has raised $94 million in total funding (seed £2.5M in June 2023 led by AlbionVC; Series A £10.5M in September 2024 led by Atomico; Series B $75M in February 2026 led by Lightspeed Venture Partners) at a ~$300 million post-money valuation, employs 90+ people, and has announced first international expansion into Texas and Australia.
Tem-Energy firmographics
Firmographics- Name
- Tem-Energy
- Legal name
- Tem-Energy Limited
- Website
- https://tem.energy
- Company type
- Private
- Founded year
- 2021
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Short description
- Tem-Energy operates an AI-native energy transaction infrastructure, using its Rosso engine to match UK renewable generators directly with business customers via the RED utility platform, processing $300M+ in annualised gross transaction value across 6,000+ sites.
- Ownership category
- akta.pro rank
Tem-Energy industry classification
Industry- Product category
- Energy Transaction Platform
- NAICS
- Electric Power Generation, Transmission and Distribution (2211), Fuel Dealers (45721)
- SIC
- Cogeneration Services & Small Power Producers (4991)
- akta.pro primary industry
- Auto-Switching & Price Comparison Platforms (EUAGAEAD)
Keywords
Where Tem-Energy is headquartered
LocationHeadquarters
- HQ city
- London
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
Tem-Energy business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Personnel, Technology or R&D, Operations, Marketing or Sales, Infrastructure
Revenue model
- Transaction-based energy marketplace (the "Stripe of energy"): Core revenue model: tem captures margin as the difference between what generators receive and what businesses pay on energy transacted through the Rosso engine / RED platform, bypassing the wholesale market. Positioned as the "Stripe of energy" — transaction-taker on AI-native energy infrastructure. Processed $300 million in annualised gross transaction value.
- RED™ utility service recurring revenue: Recurring B2B utility contract revenue from businesses signing RED™ contracts; customers pay per kWh consumed (per-unit pricing) with line-itemised transparent billing. Renewal rate for generators over 95%.
- Licensing to global utilities (planned): Future revenue stream — tem plans to license its technology to global utilities as part of Series B expansion plans.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Unit Pricing | Multi-year contract | RED™ business contract (quote-based, not publicly disclosed) |
| Unit Pricing | Pay-as-you-go | Out-of-contract default rate (publicly disclosed) |
| Outcome Based/ Performance | Pay-as-you-go | Generator earnings (typically ~10% more per MWh) |
Go-to-market motion5 records
Distribution channels6 records
Marketing channels10 records
Tem-Energy product offering
Product offeringCore offering
Tem-Energy operates an AI-native energy transaction infrastructure composed of two proprietary systems: Rosso, an AI-powered transaction engine that uses machine learning and large language models to forecast supply and demand and match renewable generators directly with business customers; and RED™, a modern utility customer platform built on top of the engine that delivers line-by-line transparent billing, half-hourly meter data reconciliation, and direct renewable supply to UK businesses. The platform removes 5–6 layers of intermediaries and bypasses the wholesale market, capturing margin as the difference between what generators receive and what businesses pay.
Product overview
Tem-Energy offers a single AI-native energy transaction platform composed of two named, tightly coupled products: Rosso (the underlying AI transaction engine / pricing infrastructure) and RED™ (the customer-facing modern utility built on top of it). The platform is structured as core infrastructure (Rosso) plus a customer-facing utility product (RED), with the Generator side of the platform serving renewable energy producers. Together they replace traditional wholesale-market energy trading with direct, AI-driven matching of renewable generators and business customers.
Differentiator
Problem solved
Functional benefit
Brands
- RED™: The company's modern utility / customer-facing platform (also called a 'neo-utility') powered by its AI-native infrastructure, used by businesses and brokers to manage energy contracts, billing, usage data, and contracts.
- Rosso
Products and services
- RED™ (tem modern utility) Customer-facing modern utility service for UK businesses, powered by tem's AI-native transaction infrastructure. Connects businesses directly with renewable generators, offers line-by-line transparent billing, half-hourly reconciliation, predictable pricing, and reported savings of up to 30% versus traditional utility supply. Operates alongside an Ofgem-licensed supply partner (Versa Energy) for compliance.
- Rosso (AI transaction engine / pricing infrastructure) The AI-powered transaction engine and pricing infrastructure that sits beneath RED. Matches renewable generators to business demand, removes intermediary and wholesale-market markups, and uses machine learning and large language models to forecast supply and demand.
- Generator Portal (For Generators) Generator-facing counterpart to RED. Onboards renewable generators (solar, wind, hydro, anaerobic digestion, biomass, EfW), pays them on self-billing invoices within 10 business days of month-end, and provides daily generation/earnings visibility. Generators typically earn around 10% more per MWh than the wholesale route.
- Physical-hedging market (with Electron) UK-first physical-hedging capability built on top of Rosso. Reserves real battery storage capacity in advance via Electron's flexibility marketplace and dispatches it when tem's AI predicts a supply/demand gap, removing last-minute wholesale premiums from customer pricing.
- Exempt Supply (P442) administration service Value-unlock service layered on RED following the 2024 P442 government scheme update. Tem checks eligibility, prepares paperwork, and liaises with the central body on behalf of RED customers, unlocking additional savings or earnings for eligible businesses and generators.
Quantifiable outcome
- Up to 30% reduction in business energy bills by removing wholesale markups and intermediary fees.
- +7 more outcomes
Companies that use Tem-Energy
Customer profileNamed customers8 records
Segments4 records
Ideal customer profiles4 records
Tem-Energy technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration2 records
AI capability8 records
Feature5 records
Tem-Energy partnerships and signals
Strategic signalPartnerships
Ten partnerships are on record, tiered core and flagship.
- Silverstone (Silverstone Circuit)coreCo-marketed partnership with Silverstone ("Silverstone Teams up with Tem to Power a New Energy Future for British Motorsport"). Silverstone is also a customer, reporting 25% lower energy costs and serves as a flagship testimonial case study.
- Versa EnergyflagshipLicensed utility partner registered with Ofgem and the Energy Ombudsman. Versa Energy handles meter registrations, compliance checks, and is the licensed party behind the regulatory interface; tem administers customer contracts on top. "We work with a licensed supply partner, so you're fully protected under UK regulations."
- Electron (ElectronConnect)flagshipStrategic technology partnership to build the UK's first physical-hedging market. Electron runs one of the UK's biggest flexibility marketplaces connecting battery storage operators; tem contracts battery capacity in advance and dispatches it through Electron's platform when renewable output falls short, avoiding the last-minute wholesale premium. "tem and Electron have combined that infrastructure with tem's transaction model to create the UK's first physical-hedging market."
- ModulrcoreUK-based payment and delivery service provider used by tem to process Contact, Financial and Transaction Data (per Privacy Policy).
- CreditSafecoreUK-based credit history data provider used by tem to collect credit history data on customers (per Privacy Policy).
- Google AnalyticscoreAnalytics provider used by tem to track and report website traffic and usage patterns (all data stored in EEA/UK).
- HubSpotcoreCRM and tracking provider for user actions and personalised user experiences. Used for marketing communications.
- HotjarcoreMonitors user interactions, provides heatmaps, and records user sessions to enhance user experience.
- SentrycoreUK-based debugging and website performance monitoring service used to maintain optimal website performance.
- Google AdscoreUK-based advertising network used for paid acquisition.
Scale indicators11 records
Recent moves6 records
Expansion highlights7 records
Tem-Energy competitors and assessment
Company assessmentDirect peers
- Octopus Energy: UK-based renewable energy challenger with both B2C and B2B arms, a tech-first platform (Kraken), and aggressive international expansion. Most direct functional competitor to tem's modern-utility proposition in the UK business energy market.
- OVO Energy: Major UK energy challenger serving households and businesses, with strong renewable credentials and its own tech platform. Competes head-to-head with tem for UK business energy contracts, particularly in the SME and mid-market segment.
- SmartestEnergy: UK B2B renewable electricity supplier (Marubeni-owned) that buys directly from independent generators and sells to business customers. Operates in the same direct-from-generator niche as tem, targeting the same supply and demand sides.
- Piclo: UK-based renewable energy matching platform connecting generators with business demand via data-driven matching tools. Closest peer to tem's marketplace/transactional layer, though without the full neo-utility billing stack.
- Bryt Energy: UK B2B renewable electricity supplier focused on businesses seeking traceable renewable supply. Competes with tem for mid-market and enterprise UK business customers on renewable and transparent billing.
Broad incumbents
- EDF Energy: One of the Big Six UK utilities and a major B2B electricity supplier with its own generation portfolio. Competes with tem across UK business energy but as part of a much broader retail and generation portfolio.
- Shell Energy: Shell's UK retail energy business serving large business customers, with growing renewable supply offers. Incumbent competitor with deep capital and license assets versus tem's tech-led proposition.
- British Gas: Largest UK energy supplier (Centrica-owned) with dominant B2B presence and an in-house renewable supply arm. Broad incumbent offering competing with tem on price and renewable credentials across UK business customers.
- E.ON UK: One of the Big Six UK utilities serving businesses with both fossil and renewable tariffs. Broad incumbent competing with tem across UK business energy, with substantial capital and licensed infrastructure.
Emerging players
- Arcadia: US clean energy data and marketplace platform connecting businesses to renewable supply and managing community solar programmes. Comparable to tem on the data-and-marketplace approach, but US-focused and at earlier scale.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat6 records
Key highlights7 records
Customer concentration
Tem-Energy social profiles
Digital presenceTem-Energy compliance and trust
Trust signalCompliance4 records
Tem-Energy financial estimates
Financial estimateRevenue estimate
Valuation estimate
Tem-Energy leadership team
Management profileNumber of profiles
Profiles4 records
Tem-Energy subsidiaries and ownership
Company hierarchySubsidiaries1 record
Tem-Energy funding detail
Funding detailFunding overview
Funding rounds5 records
Investors10 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Tem-Energy 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 Tem-Energy
What does Tem-Energy do?
Tem-Energy operates an AI-native energy transaction infrastructure composed of two proprietary systems: Rosso, an AI-powered transaction engine that uses machine learning and large language models to forecast supply and demand and match renewable generators directly with business customers; and RED™, a modern utility customer platform built on top of the engine that delivers line-by-line transparent billing, half-hourly meter data reconciliation, and direct renewable supply to UK businesses. The platform removes 5–6 layers of intermediaries and bypasses the wholesale market, capturing margin as the difference between what generators receive and what businesses pay.
Is Tem-Energy a public or private company?
Tem-Energy is a private company. It is classified as venture growth investor backed and is currently operating.
When was Tem-Energy founded?
Tem-Energy was founded in 2021. It employs 101 to 250 people.
Where is Tem-Energy based?
Tem-Energy is headquartered in London, United Kingdom, in the Europe region.
How does Tem-Energy make money?
Three revenue lines are on record. Transaction-based energy marketplace (the "Stripe of energy") is the primary driver. The others are RED™ utility service recurring revenue and licensing to global utilities (planned).
Who are Tem-Energy's main competitors?
Direct peers on record are Octopus Energy, OVO Energy, SmartestEnergy, Piclo and Bryt Energy. Broad incumbents are EDF Energy, Shell Energy, British Gas and E.ON UK. Arcadia is listed as an emerging player.
Does Tem-Energy have an API?
No public API is recorded for Tem-Energy.
What industry is Tem-Energy in?
Tem-Energy's product category is Energy Transaction Platform. Its primary akta.pro industry code is EUAGAEAD, Auto-Switching & Price Comparison Platforms. Its NAICS code is 2211 and its SIC code is 4991.