Paris, France, the 16th of September 2025 — Temelion, the Artificial Intelligence platform transforming how building engineering firms manage pre-construction flows, announces a €3.2M seed funding round. This round, led by 360 Capital with participation from ISAI Build Venture, SE Ventures, and Kima Ventures, marks a key milestone in the startup’s development. This operation will enable it to accelerate its go-to-market strategy and strengthen its presence with the French Engineering Consultancy market. 

With offices in Paris and Toulouse, Temelion is on a mission to remove bottlenecks and to streamline complex pre-construction engineering workflows using AI. Its vision: empowering engineers to move beyond repetitive tasks to time-efficient and error-free deliverables, achieving cost savings and higher quality in the built environment.

Temelion is an AI platform for building design engineers, automating repetitive tasks and keeping project requirements, documents, and deliverables in sync. It accelerates bidding decisions, generates accurate technical documentation, and simplifies contractor evaluation. With upcoming trade-specific workflows in areas such as Mechanical (HVAC), Electrical, and Plumbing, Temelion is building a comprehensive suite for engineers to deliver faster, more accurate, and higher-quality outcomes.

Founded in 2025 by Jérôme Joaug, Rodolphe Héliot, and Sébastien Gilles, Temelion relies on a team of serial entrepreneurs with decades of experience as investors and leaders in high-growth companies. Their backgrounds, marked by multiple successful exits, reflects a blend of expertise and a deep passion for the built environment, sustainable construction, and technology, having spent years developing software tools for complex and challenging environments.

This funding, led by 360 Capital alongside ISAI Build Venture, SE Ventures, and Kima Ventures, as well as angel investors  from the construction sector, will enable Temelion to:

• Expand its engineering team to refine the product across various workflows: This includes deepening AI capabilities for technical proposal generation, tender analysis, and regulatory compliance, to name a few, and ensuring the platform evolves with the real-world needs of multidisciplinary engineering teams.
• Accelerate its commercial rollout in France, with a focus on Building Engineering Firms: With growing needs for building renovation, the expansion of technological and transport infrastructure, and increasingly strict regulatory requirements, French engineering consultancies are facing increasingly complex, high-stakes projects. In this environment, Temelion is an essential technology partner for design firms who need to deliver with speed, quality, and differentiated value.
• Invest in Customer onboarding, support, and integrations with industry-standard tools: Invest in developing seamless compatibility with BIM platforms like REVIT, and other key engineering calculation softwares that will enable smoother adoption and embed Temelion into the daily workflows of design engineering offices.

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Jérôme Joaug, Co-founder and CPO of Temelion:

“When we first spoke with engineers, we expected resistance to AI. What we found instead was universal frustration with the hours spent crunching documents — work that none of them signed up for, yet dominates their daily lives. Temelion was created to free them from these tedious tasks and allow them to focus on the technical dimensions of engineering they truly love.”

Rodolphe Héliot, Co-founder and CEO of Temelion:

“This fundraising allows Temelion to bring together top talent in AI and building engineering to tackle one of construction’s great challenges: design automation. We are thrilled to accelerate product development and market rollout, with the ambition of quickly becoming our clients’ preferred technology partner, capable of supporting them throughout the entire project lifecycle.”

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Alexandre Mordacq, Partner at 360 Capital:

“Temelion illustrates how AI can address concrete needs in complex sectors like construction. Their approach is fully aligned with our early-stage investor DNA: supporting visionary teams that put technology at the service of efficiency, sustainability, and the transformation of strategic industries. We are convinced that Temelion can become a reference player for engineering firms in France and worldwide, and we are pleased to support them from this key stage.”

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About Temelion

Temelion is a construction technology startup based in Station F, Paris and Toulouse. It provides an AI-powered platform supporting building engineering firms during the pre-construction phase, by automating project analysis and generation of project deliverables. The outcome is time-efficient and error-free deliverables that empower engineering firms to achieve cost savings and higher quality in the built environment.

Founded in 2025, Temelion is already working with major engineering and architecture firms in France in a beta phase and aims to expand across Europe. Learn more: www.temelion.ai

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About 360 Capital

360 Capital is an early-stage venture capital firm – from pre-seed to Series B – investing in Europe in Deep Tech, Climate Tech, and Digital-First solutions. Since 1997, it has supported talented entrepreneurs in building high-growth technology companies. Led by an experienced team based in Paris, London, and Milan, 360 Capital manages €500 million in assets and a portfolio of more than 60 investments. For more information: www.360cap.vc

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About ISAI Build Venture

Created in partnership with Bouygues, ISAI Build Venture is a global investment fund that participates as a co-investor in seed to Series C rounds for startups offering solutions that accelerate the transformation and decarbonization of the construction, real estate, mobility infrastructure, and energy industries. ISAI Build Venture is a strategy of ISAI Gestion (“ISAI”), one of the pioneers of investment in French Tech created in 2009. The company is a signatory of the UNPRI and an active player in inclusive and low-carbon Tech. For more information: www.isai.fr

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About SE Ventures

SE Ventures is a €1B venture capital firm based in Menlo Park. A team of specialist investors and operators, SE Ventures backs bold entrepreneurs in Industrial & Climate Tech and drives commercial acceleration for portfolio startups by tapping into the deep domain expertise and global customer base of its LP, Schneider Electric. For more information, visit: http://www.seventures.com

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About Kima Ventures

Kima Ventures is the venture capital arm of Xavier Niel, one of the most active early-stage investors in the world. Kima is investing in 100 startups per year from pre-seed to seed. Based in Station F in Paris, Kima has invested since 2010 in almost 1000 startups, including Transferwise, Sorare, Agicap, Boom, Ledger and Alma, providing founders with funding, network and support for them to reach the next steps of their journey. For more information: https://www.kimaventures.com/

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Press Contact, Temelion
Jérôme Joaug, Co‑founder & CPO — jerome.joaug@temelion.ai
Rini Bankhwal, Marketing Lead — rini.bankhwal@temelion.ai

Press Contact, 360 Capital
Kablé Communication - Illy Benyoussef – illy.benyoussef@kable-communication.com

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