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
How much has Aira raised?
$658.8Macross 5 recorded rounds

Most recently, Aira raised $174.6M in its Early Stage VC (Aug 2025).

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Aira round by round

5 rounds
Aug 2025Early Stage VC$174.6M▮
+ 4 more investors · free account
Jun 2024Debt - General$216.6M▮
May 2024Non-Equity Acceleratorundisclosed▮
+ 1 more investors · free account
Jan 2024Series B$228.9M▮
—Series A$38.7M▮

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.

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11 investors have backed Aira.

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Frequently asked about Aira

How much has Aira raised?
Aira has raised $658.8M in total across 5 recorded funding rounds.
Who are Aira's lead investors?
Lead investors in Aira's recorded rounds include Altor Equity Partners, Kinnevik (STO: KINV A), Temasek Holdings.
When was Aira's last funding round?
Aira's most recent recorded round was Early Stage VC in Aug 2025, raising $174.6M.