The Short Life of Vatorex's EIC Accelerator Heated Beehive

The varroa mite breeds inside the capped cells where honeybee larvae grow, and beekeepers have fought it for decades with acids and synthetic miticides. Vatorex, a Swiss start-up run by the biologist and beekeeper Willi Brunner and by Pascal Brunner, tried something else: a heating wire embedded in every brood comb that warms the brood to about 42°C, a temperature the mite does not survive and the bees do. The European Commission's list of winners of the May 2020 EIC Accelerator pilot cut-off names Vatorex AG of Wiesendangen, with no partner company, for a grant-only award. CORDIS records an EU contribution of €1,642,975.25 towards a €2,684,632.50 project that ran from October 2020 to March 2023.

Two years after the project ended, on 19 May 2025, the district court of Winterthur opened bankruptcy proceedings against the company, according to its entry in the Swiss commercial register (Zefix) and the provisional bankruptcy notice in the Swiss Official Gazette of Commerce (SHAB). The court declared the proceedings closed on 21 May 2026, and Vatorex AG in Liquidation was struck off the register ex officio, as published on 10 June 2026 in the SHAB deletion notice. The company no longer exists.

How Vatorex Ended

The bankruptcy was run in the summary procedure. In its call to creditors of 20 June 2025, the Winterthur-Altstadt bankruptcy office wrote that the estate consisted of at most CHF 12,000 in realisable assets. The board told the office that buyers intended to take over all of the company's licences, trademarks and equipment as a package, which the board valued at "at least a five-figure amount"; the office wrote that it could not verify that figure and that no concrete offer had arrived. It asked creditors to approve spending around CHF 8,000 to keep the company's foreign intellectual property rights from lapsing and set a deadline of 31 July 2025 for purchase offers. Whether anyone bought the package has not been published.

The later creditor resolutions show how far the company had spread. In October 2025 the office proposed writing off unsubstantiated receivables, a bank account at BNZ in Auckland estimated at CHF 350 and "various items in an industrial hall in Alberta" estimated at CHF 2,500, because recovering them would cost more than they were worth. A final resolution in February 2026 dealt with one more bank balance of CHF 2,613.79. The closing notice followed in June 2026.

The company's two web domains, vatorex.ch and vatorex.com, now carry online casino advertising pages with no connection to the company, as checked on 18 October 2026. Its earlier site survives in the Wayback Machine, where a December 2024 copy still sells the "Varroa Kit" and the "Full Hive Kit".

The Technology: Floor Heating for the Brood

Heat against varroa is an old idea. Mites tolerate less heat than bees, and earlier approaches heated brood frames taken out of the colony, which the authors of a 2023 field study describe as a high workload and hardly feasible for large operations. Vatorex instead embedded insulated coils in the wax foundation of each brood comb. In the version described on its website and in the CORDIS results summary, the combs are held at 42°C for three-hour periods and the cycle repeats automatically every 16 days. A controller called the Apibrain ran up to 20 hives per apiary, powered by mains or solar panels, and a phone app, the Hive Manager, logged inspections. In 2023 the company moved to a sixth-generation comb with a plastic foundation, an aluminium mat for even heat and a temperature sensor, according to its 2023 review.

The CORDIS objective made strong claims: that "95% of male mites and nymphs die at 41ºC within 2 hours", and that the system cut sanitary costs per hive by 66% and total honey production costs by 18%. These are the company's own figures; no independent source for the cost savings could be found.

The one peer-reviewed field test is more nuanced. A one-year trial at three apiaries, published in the Journal of Pest Science in November 2023 by two researchers from the Research Institute of Organic Agriculture (FiBL) in Frick together with Willi and Pascal Brunner, tested the fourth-generation Varroa Kit against colonies treated with formic acid. The device kept mite numbers below critical thresholds until autumn and avoided the late-season queen losses seen in the formic acid group. But the heat also killed eggs and larvae, not only the capped pupae it targeted. The authors report temporarily fewer adult workers and "overall lower honey harvests" in heated colonies.

What the EIC Project Promised, and What CORDIS Shows

The Accelerator grant followed a €50,000 SME Instrument Phase 1 study from February to May 2019. Its report says the system had been demonstrated with more than 100 early adopters and forecast sales of €29 million of "Vatorex V2.0" in the first five years of commercialisation. The Phase 2 project, under the Green Deal topic of the 2020 EIC Accelerator pilot, was to take the heat treatment "towards product-market-fit".

The periodic report on CORDIS is labelled as covering October 2021 to March 2023, but its text describes "the first 12 months": the Apibrain CPU and Hive Connect hardware finished, the Hive Manager app released in the app stores, improved heating algorithms, production capacity for two years of demand, and an Innosuisse certification. The tasks it lists as still ahead, a new product ready for pilot trials in 2022, commercial pilots over at least one season and a scaled supply chain, are not reported as completed anywhere on CORDIS. The results summary of September 2023 quotes Pascal Brunner saying production costs were "on our way" to a 35% reduction and that third-party scientific tests had been positive, and it names the next product, a thermal brood chamber aimed at large commercial beekeepers.

1. Hardware and appDeliveredApibrain, Hive Connect and Hive Manager app finished, per CORDIS; sold as kits on the website until 2024.
2. Optimised heat treatmentPartlyThe 2023 field study confirms mite control but also brood losses and lower honey harvests.
3. 35% lower cost of goodsUnverifiedDescribed as "on our way" in 2023; no figure published.
4. Commercial pilots over a seasonNot deliveredAlberta hives were due in spring 2024; no trial result was ever published.
5. Market roll-out, €29M sales in five yearsNot deliveredBankrupt in May 2025 with at most CHF 12,000 of assets.

The award gets a "partly delivered": the hardware, the app and a published field study exist, but the commercial validation that the project was meant to reach never appeared, and the company did not survive long enough to sell the product at scale.

What Happened After the Grant

Vatorex bet its future on large commercial beekeepers outside Switzerland. In October 2022 it raised CHF 1.1 million in bridge financing from the EIC Fund, the Winterthur angel investor Mike Keller and a start-up loan from Basellandschaftliche Kantonalbank, according to Startupticker, which also reported that the technology was in use in more than 12 countries. The EIC Fund's own list of invested companies, checked across all 16 pages on 18 October 2026, does not include Vatorex, so the reported EIC equity stake could not be confirmed. The original Venture Kick announcement of the round could not be opened.

The same month brought a Canadian partnership. The Alberta Beekeepers Commission and Vatorex were to receive CAD 653,227 from Results Driven Agriculture Research (RDAR), with CAD 161,000 cost-shared by the federal and provincial governments, to test the system with commercial beekeepers, according to a company post that reprints statements from both governments; Startupticker gives the value as CAD 650,000. In spring 2023 Vatorex shipped 3,000 frames to Alberta to be drawn out by the bees, with its own hive bodies due in early 2024, according to its May 2023 trial update. In November 2023 it set up a further trial of 90 hives with 600 frames at Waiau Apiaries north of Christchurch, New Zealand, the company wrote.

The Money

Vatorex's revenue, losses and staff numbers are not public: no accounts appear in the register and none were found elsewhere. The register shows how it was financed. Share capital rose from CHF 100,000 at registration to CHF 111,111 in 2017 and CHF 118,453 in May 2020, when preference shares were created and CHF 135,945.72 of claims were converted into shares, according to the SHAB entries listed on Zefix. On 18 December 2024 a further CHF 641,689.28 of claims was converted into 20,084 preference shares, Pascal Brunner took over as board chair and the seat moved from Wiesendangen to Winterthur. Five months later the company was bankrupt.

Before the EU money, the company had smaller backers. The Klimastiftung Schweiz gave it CHF 150,000 in 2018 to develop the fourth-generation box, when Vatorex said it had more than 70 customers in Switzerland and other European countries, Moneycab reported. The founding date is given differently: the Phase 1 CORDIS objective says the business "started off as an association in 2015", Moneycab also gives 2015, while Startupticker says Vatorex was founded in 2016, the year the company was entered in the register.

Why Europe Should Care

Varroa is the parasite that Europe's beekeeping policy spends money on. Under the CAP strategic plans for 2023 to 2027, "combatting beehive invaders and diseases, in particular varroasis" is one of the support measures for the honey sector, whose EU funding rose from €40 million in 2019 to €60 million a year from 2021, according to the European Commission. A chemical-free treatment also fits the EU's wider pollinator agenda, the Pollinators Initiative of 2018, revised in 2023, although that initiative concerns wild pollinators rather than managed honeybees. Residue-free honey matters for export markets too, as Vatorex itself noted for New Zealand.

The Verdict

Vatorex's former managers and the EIC have not been asked for comment for this article. It is based entirely on public records, company statements and EU project data, linked throughout.