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Aira

Stockholm, Sweden · Founded 2021 · Privately Held (backing)

Developer of clean energy systems designed to reduce carbon dioxide emissions from residential heating. Aira is based in Stockholm, Sweden and was founded in 2021. It was valued at $532 million at its Series B in Jan 2024, the last priced event on record. It has raised $659 million across 5 recorded rounds; the latest was a $175 million early-stage round in Aug 2025.

PMV mark · valuation
$532.0M
Oct 2026
Priced at
its Series B
Jan 2024
Total raised
$658.8M
Last round
Early Stage VC
Aug 2025

Aira key facts

as of Oct 2026
  • Developer of clean energy systems designed to reduce carbon dioxide emissions from residential heating.
  • Aira is valued at approximately $532.0M as of Oct 2026, set at its Series B, Jan 2024; nothing has traded since, per PrivateMarketView’s mark.
  • It has raised $658.8M across 5 recorded rounds; the latest was Early Stage VC ($174.6M) in Aug 2025.
  • Notable investors include Collaborative Fund, Temasek Holdings, London & Partners., Nesta, Lingotto — 11 tracked in total.
  • Status: Privately Held (backing).
PrivateMarketView mark
LOW confidence
$532.0M

Valued at $532.0M at its Series B, Jan 2024. Nothing has traded since.

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Aira funding rounds

5 rounds
Aug 2025Early Stage VC$174.6M▮
Jun 2024Debt - General$216.6M▮
May 2024Non-Equity Accelerator—▮
Jan 2024Series B$228.9M▮
Series A$38.7M▮
Full funding history →

Aira valuation

Aira was valued at $532 million at its Series B in Jan 2024. That is the last priced event on record: no secondary trade or institutional fund mark has moved the figure since.

How much has Aira raised?

Aira has raised $659 million across 5 recorded rounds since 2024. The largest was a $38.7 million Series A; the most recent was a $175 million early-stage round in Aug 2025. 1 of the rounds disclosed a post-money valuation.

Aira investors

11 investors are on record for Aira, including Collaborative Fund, Temasek Holdings, London & Partners. and Nesta. The early-stage round in Aug 2025 drew 4 investors.

About Aira

Developer of clean energy systems designed to reduce carbon dioxide emissions from residential heating. The company's heat pumps use clean, free air from outside to create a cool, regulated climate inside the residence, enabling customers to reduce their energy bills and their personal carbon dioxide footprint effectively.

Sector
Consumer Products and Services (B2C)
HQ
Stockholm, Sweden
Founded
2021
Employees
1,200
Ownership
Privately Held (backing)

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