Substack

Publishing · San Francisco, CA · Founded 2017 · Privately Held (backing)

Operator of a subscription-based publishing platform intended to generate money from newsletter subscriptions. Substack is based in San Francisco, CA and was founded in 2017. It was valued at $1.1 billion at its later-stage round in Jul 2025, the last priced event on record. It has raised $220 million across 4 recorded rounds; the latest was an $83.3 million Series B in Sep 2024.

PMV mark · valuation
$1.1B
Oct 2026
Priced at
its later-stage round
Jul 2025
Total raised
$220.3M
Last round
Later Stage VC (Series B)
Sep 2024
How much has Substack raised?
$220.3Macross 4 recorded rounds · Jul 2019 – Sep 2024

Most recently, Substack raised $83.3M in its Later Stage VC (Series B) (Sep 2024).

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Substack round by round

4 rounds
Sep 2024Later Stage VC (Series B)$83.3M▮
+ 1 more investors · free account
May 2023Seed Round$3.3MSEC filing▮
1 investors participated
Apr 2021Later Stage VC$65.0MSEC filing▮
33 investors participated
Jul 2019Early Stage VC$19.1MSEC filing▮
32 investors participated

How much has Substack raised?

Substack has raised $220 million across 4 recorded rounds since 2019. The largest was an $83.3 million Series B in Sep 2024.

Substack has filed 3 Form Ds with the SEC since 2019, most recently in May 2023 ($3.3 million sold to 1 investor).

Substack investors

51 investors are on record for Substack, including Andreessen Horowitz, General Catalyst, Metaplanet Holdings and Quiet Capital. By type, the record holds 15 venture capital firms and 3 angel investors. The Series B in Sep 2024 drew 33 investors.

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Frequently asked about Substack

How much has Substack raised?
Substack has raised $220.3M in total across 4 recorded funding rounds.
When was Substack's last funding round?
Substack's most recent recorded round was Later Stage VC (Series B) in Sep 2024, raising $83.3M.