SO SPONGE
for closed and semi-closed environments.
Every year, 1 million tons of disposable desiccants end up in the bin, and industrial dehumidifiers consume 3× more energy than necessary.
Humidity is a universal problem: failures in outdoor electronics, goods destroyed in containers, degraded buildings, runaway energy bills. No one delivers a sustainable answer today.
Coming out of IFPEN / UCBL public research and under exclusive license, So Sponge brings answers across two ranges: a passive product range in early commercial rollout (33 signed customers, 299 leads), and an active dehumidifier range 3× more energy-efficient, fluorinated-gas-free, currently in technical pilot phase.
Five reasons to invest today
Before the first AirSwing licensing deals
The second revenue engine (OEM licensing) will re-rate the company at the first signature. This seed window is the last one at the current valuation.
Passive traction already proven
33 signed customers, 299 qualified leads, first invoiced revenue. Commercial risk is addressed — this is no longer a technology bet.
R&D funded by public research
BPI i-Lab grant (€375k) and IFPEN partnership cover R&D costs. This round funds only commercialization and industrialization.
Unique regulatory tailwind
F-Gas Regulation (2024), ESPR, CSRD. Fluorinated-gas-free alternatives become mandatory over 5 years — So Sponge is ready.
IP locked, ecosystem in place
Exclusive worldwide Pulsalys license + Axens (IFPEN) material sourcing + production partners. 0% IP risk, 0% supply-chain risk.
One material platform, two growth engines
Air Sponge — The durable replacement for disposable desiccants
So Sponge adsorbs moisture and releases it back in a loop, with no energy and no maintenance. One piece replaces years of disposable desiccants (silica gel, CaCl₂ — 1 Mt/yr, 0% recyclable).
Sub-ranges:
AS-C — Anti-condensation tapes for urban and logistics infrastructure: EV chargers, maritime containers, outdoor technical cabinets.
AS-B — Anti-condensation stickers for embedded electronics: IP67 sensors, outdoor IoT, embedded enclosures.
AirSwing — The dehumidifier ÷3 energy, fluorinated-gas-free
Dividing industrial dehumidifier energy consumption by 3, with no fluorinated gases. Compliant with EU F-Gas Regulation by design.
Technology: an adsorption/desorption cycle on our material replaces mechanical compression. Result: 1,000 kJ/kg water extracted vs 3,200 kJ/kg in conventional technology.
IP secured: material patent extension in progress · exclusive worldwide Pulsalys license · AirSwing process patent filing in progress.
Pure OEM / licensing model: €50k/OEM/yr fixed license (100% margin) + recurring consumable material + royalties. Axel One pilot underway. BPI i-Lab €375k grant secured.
Consolidated financial trajectory
Trajectory de-risked by the passive engine, re-rated by the active engine licensing deals from 2027 onward.
| Indicator | 2026 | 2027 | 2028 | 2029 | 2030 |
|---|---|---|---|---|---|
| Revenue (k€) | 84 | 614 | 1,643 | 3,340 | 5,672 |
| Gross margin (%) | 52% | 70% | 57% | 56% | 55% |
| EBITDA (k€) | (340) | (97) | +284 | +938 | +1,978 |
| EBITDA margin (%) | — | — | 17% | 28% | 35% |
| Headcount (FTE) | 4 | 5 | 8 | 10 | 11 |
| Breakeven | 2028 | ||||
An industrial ecosystem already in place
Founding team
Round terms
Seed round
Co-investment welcome: deeptech seed funds, business angels, BA networks, Bpifrance Amorçage.
Receive the detailed memo
So Sponge SAS — Lyon, France
Guirec Courbon — CEO & Co-founder
guirec@sosponge.com · sosponge.com