89. Cosysense With patented AI-powered climate control, Cosysense cuts electricity costs and carbon emissions for commercial buildings while keeping occupants comfortable. Written by Helena Young Sponsored by Sage Published on January 12, 2026 About the Startups 100 Now in its 18th year, the Startups 100 is the definitive list of the most promising new UK businesses. There's no fee for entry or for inclusion in our index. The Startups team of new business experts judge all our top 100 entrants in collaboration with specialist industry consultants. See our guide to this year’s hottest new businesses and most exceptional founders in the complete 2026 Startups 100 index. Founders: Matias Acosta and Sebastian HorstmannYear founded: 2022Website: cosysense.spaceGetting the temperature just right is a common point of contention in the office – and it can be all the more frustrating for building managers when the cost of heating and cooling a commercial site is so high.Having struggled to stay comfortable in coworking spaces around the world, Matias Acosta and Sebastian Horstmann knew there was something wrong with existing commercial HVAC (heating, ventilation, and air conditioning) systems.HVACs are set to a fixed temperature, which, according to Cosysense, means up to 80% of people will be uncomfortable, with women and minorities disproportionately affected. HVACs also consume large percentages of a commercial building’s power – making for huge utility bills – and contribute significantly to greenhouse gases.These are the problems that led Acosta and Horstmann to found Cosysense. The startup’s patented climate control system is powered by AI agents, digital twins, and sensors that measure the building’s indoor environment, power usage, and emissions.Cosysense also measures occupants’ sentiment by installing feedback panels that allow them to press a button to signify that they are too cold, comfortable, or too warm.Fed by all of this information, Cosysense’s AI keeps the commercial buildings’ climate optimised, resulting in a comfortable working environment as well as cost savings and reduced carbon emissions. It also relays the data it collects in real-time on a dashboard that building managers can check out.Cosysense has a few exciting client announcements in the pipeline, but a key achievement so far has been getting board approval to start trialling with a major fast food chain, initially covering 2,200 restaurants and growing by 200 restaurants per year.Within the next five years, Acosta and Horstmann aim for Cosysense to have 6,000 clients across the US, UK, EU and Latin America (specifically Mexico, Brazil, and Argentina), acquiring 1% of the projected $8.1bn HVAC market. In 2026, things are heating up for this startup with no signs of cooling down.View the full Startups 100 Index for 20261. Omnea2. HIVED3. MAGIC AI4. OXCCU5. Lightyear6. Neuranics 7. Hormona8. Burbank9. Better Dairy 10. Lenkie Technologies11. Userled12. Hoxton Farms13. Rensair14. PulpaTronics15. TradeKart16. 32Co17. Carmoola18. cheqd19. Sightline Analytics20. Adamo Foods21. Bold Bean Co22. Beams Renovation 23. Pan Galactic24. Capi Money25. Spotted Zebra26. ANTHROTEK 27. Unravel28. Perci Health29. Untap Health30. Hair Syrup31. Connect Earth 32. spacebands 33. Unfabled34. Lightning Reach35. STOCKED36. Embeddable37. XR Therapeutics38. Literal Labs39. Scooch40. Openr41. Fibe Limited42. Inicio AI43. Peachies44. Better Nature 45. Ctrl Alt46. Resting Reef47. Nila48. ROXFIT49. Finmile50. NavLive51. Volunteero52. Inntelo AI53. Zonova54. A&B Smart Materials55. Ethicronics56. Treeapp57. kennek58. Soil Benchmark59. Vox Aeris60. Asan Cup61. Nuuri62. Mindstone63. MYNDUP64. Enbiosis Biotechnology65. JUX Food66. Danu Robotics67. Wylde Market68. Air Aware Labs69. Mimicrete Ltd70. ALYVE71. Happl72. Living Things73. Grub Club Pets74. Mealia75. PetProov76. Lylo Products77. Chest78. ZIM Connections79. Uptime Labs80. Teal81. Zero Fintech82. Micro Thermal Energy 83. Kanjo 84. Merlin Cloud85. My Skin Feels86. Eleria87. Cashblack88. RevvedUp89. Cosysense90. SuperFi91. Loom92. Legacy Compass93. Meshed94. SWURF95. Main Squeeze96. Sampl Technologies97. Over the Moo98. Pioneering People99. Bikebook100. Recondition Share this post facebook twitter linkedin Tags 2026 Written by: Helena Young Deputy Editor Helena is Deputy Editor at Startups. She oversees all news and supporting content on Startups, and is also the author of the weekly Startups email newsletter, delivering must-know SME updates straight to their inbox. From interviewing Wetherspoon's boss Tim Martin to spotting data-led working from home trends, her insight has been featured by major trade publications including the ICAEW, and news outlets like the BBC, ITV News, Daily Express, and HuffPost UK. With a background in PR and marketing, Helena is particularly passionate about giving early-stage startups a platform to boost their brands. That's one reason she manages the Startups 100 Index, our annual ranking of new UK businesses. Sponsored by: Sage Startups 100 Index Sponsor 2026 Sage exists to knock down barriers so everyone can thrive, starting with the millions of Small and Mid-Sized Businesses served by us, our partners and accountants. Customers trust our finance, HR and payroll software to make work and money flow. By digitising business processes and relationships with customers, suppliers, employees, banks and governments, our digital network connects SMBs, removing friction and delivering insights. Knocking down barriers also means we use our time, technology and experience to tackle digital inequality, economic inequality and the climate crisis.