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Boldr
Techstars '22London, GB · 12 known investors
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Boldr provides a mobile app and energy-saving home climate products that help homeowners monitor and control their HVAC systems, reduce energy consumption, and track usage through real-time data. The company also offers appliance health monitoring for mini split systems to extend equipment lifespan and prevent cooling issues.
Also known as shopboldr
Investors · 12
How we know: the Techstars portfolio · a partner's Signal profile · uktech.news · open dataset · Top 3000 Accelerator Startups (no YC) 2026-08 · open dataset · 5k.vc investor directory · Not right? Tell us
How we know: Tetrad's portfolio page · Not right? Tell us
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How we know: a partner's Signal profile · funding news · uktech.news · the VCSheet dataset · open dataset · 5k.vc investor directory · Not right? Tell us
How we know: uktech.news · Not right? Tell us
Also in the syndicate · 5
Funding
SEC filings, press & company announcements$3.2M disclosed across 1 of 2 rounds · 2023–2025
- $3.2Mseed roundSep 2025 · 3 sources
Unconventional Ventures (lead), Ada Ventures, Inclimo Climate Tech Fund, Prosegur, S20 Fund, Techstars, Viva Holdings
Source ↗
Source: company announcements and press reports — follow each round's link for the claim.
Company profile
researched Aug 2026Boldr is a home climate technology company that sells energy-saving heating and cooling hardware alongside a companion mobile application. Its product line consists of Kelvin, a smart infrared heater positioned as an energy-saving heater, and Klima, a smart thermostat/controller for air conditioners and mini split systems.
The Boldr app allows users to manage home climate and related spending from a smartphone, with features intended to reduce energy consumption, improve convenience and provide transparency into usage. For mini split systems, the Klima controller includes Appliance Health Monitoring, which the company presents as a way to extend appliance lifespan and reduce operating issues such as a unit running without cooling effectively. Boldr also publishes a magazine-style content section and operates a help center with live support.
Business model
Boldr sells physical home climate devices directly through its own e-commerce site, with an accompanying app used to control the devices and monitor energy usage. The site advertises 48-hour express shipping and offered a 30% pre-order discount, indicating direct-to-consumer online sales including pre-orders.
Revenue from sales of home climate hardware (heaters and smart A/C controllers) through the company's online store, including pre-orders sold at a discount.
▸Full profile — technology, go-to-market, geography
Technology
Connected home climate hardware controlled through a mobile app: Kelvin, a smart infrared heater, and Klima, a smart thermostat for air conditioners. Klima includes Appliance Health Monitoring for mini split systems, and the app provides energy consumption and usage data to users.
Go-to-market
Direct-to-consumer online sales via shopboldr.com, supported by live customer support, a help center and social media presence on Instagram (@shopboldr). Boldr also runs a channel program for HVAC professionals, "Become a Boldr Pro," aimed at HVAC contractors.
Homeowners and residential users seeking to lower heating and cooling energy consumption and bills, including owners of mini split air conditioning systems; HVAC contractors are addressed through a dedicated partner program.
Geography
Sells online with 48-hour express shipping; prices on the company store are shown in US dollars.
Compiled by commissioned research from 1 cited public sources — announcements, filings, and press listed under research sources below.
Related companies · 2
Companies working in the same space as Boldr.
In the news
Boldr raises $5M to turn home energy systems into grid capacity - Tech.eutech.eu · Aug 2026
Energy startup Boldr raises £3.6m led by Unconventional Ventures with Ada Venturesstartupmag.co.uk · Aug 2026▸Research sources · 1
primary sources listed
- Boldrshopboldr.com · web
1 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Boldr do?
- Boldr sells smart home climate hardware — an infrared heater and an A/C controller — paired with an energy-management app.
- Who are Boldr's investors?
- Boldr's investors include Redbus Ventures, Techstars, Tetrad, Ada Ventures, Focal, Norrsken VC, Unconventional Ventures.
- How much funding has Boldr raised?
- Boldr has disclosed $3.2M raised across 1 of its 2 known rounds.
- Where is Boldr headquartered?
- Boldr is headquartered in London, GB.