Letter AI

Chicago, IL · Founded 2023 · Privately Held (backing)

Developer of a generative artificial intelligence platform designed to accelerate content creation for sales teams. Letter AI is based in Chicago, IL and was founded in 2023. Its last reported valuation was $306 million in Feb 2026. It has raised $53.4 million.

Last reported valuation
$305.5M
Oct 2026
Priced at
—
Total raised
$53.4M
Last round
—
What is Letter AI worth?
$305.5Mlast reported valuation · Oct 2026

Letter AI's last reported valuation, Feb 2026. Nothing priced has surfaced since.

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Valuation timeline

0 priced rounds · 32 daily marks since · Sep 2026 – Oct 2026
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Markrounds hold their value until the next priced eventMark, today
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Letter AI funding history

No rounds on record

No funding rounds for Letter AI are on record yet — either the company hasn't raised institutional capital, or the raise hasn't surfaced in our sources.

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Letter AI valuation

Letter AI's last reported valuation was $306 million in Feb 2026. No priced round, secondary trade or fund mark has surfaced since.

Institutional holders and vehicles

In the last 12 months, 1 investment vehicle was formed to buy Letter AI shares, reporting $3.3 million sold to 13 investors, per SEC Form D filings (most recent May 2026).

How Letter AI's valuation is determined

Private company valuations aren’t quoted on an exchange — they’re established in moments: a priced funding round sets a post-money valuation, secondary trades print at a price per share, and SEC-registered funds holding the stock report fair-value marks in their N-PORT filings.

For Letter AI, the most current credible signal sets the number and the older ones confirm it: a live secondary-market price first, then three or more recent prints, then institutional fund marks, and otherwise the last priced round, which never decays. The valuation is the last round’s post-money moved by the price change since that round, so no share count is assumed. Today it is set by last reported valuation. Question about this number? Full methodology →

Frequently asked about Letter AI

What is Letter AI worth?
Letter AI is valued at $305.5M as of Oct 2026. Letter AI's last reported valuation, Feb 2026. Nothing priced has surfaced since.
How much has Letter AI raised?
Letter AI has raised $53.4M in total funding across its recorded rounds.