Letter AI

Letter AI is a generative AI powered revenue enablement platform, aiming to help revenue teams enhance productivity and performance.

Y Combinator

Latest funding

$40M Series B+ · February 24, 2026

Led by Battery Ventures · Source: fundraisingfox.com

Total raised: $51.1M* across 3 sourced rounds

All 3 rounds ↓

Website: letter.ai.

X: @LetterAICo · 69 followers.

LinkedIn: letter-ai.

Sectors: B2B, Productivity.

Stage: Series B+.

Based in: Chicago, United States.

Founded: 2023.

Total raised: $51.1M* in 3 sourced rounds.

Last round: Feb 24, 2026 · 261 days ago.

Team: 70 people on the team page.

On Recent Funding since: Sep 28, 2026.

Signals

X account@LetterAICo · created Nov 6, 2023 (3 years old) · 69 followers

Website registeredDec 16, 2017 (8 years old)

TIMELINE · MONEY RAISED

Letter AI | 715 days from X account to first raise on record

@LetterAICo·Raised $51M in 2 sourced rounds·1 signal before the first raise

Money raised, round by round (amounts linked to their source). Pins are dated signals; hover the icons for dates.

Funding rounds

February 24, 2026
Series B+ · $40M
BBattery Ventures (lead), FFormus Capital, LLightbank, NNorthwestern Mutual Future Ventures, SStage 2 Capital, YY Combinator
Source: fundraisingfox.com
October 21, 2025
Series A · $10.6M
SStage 2 Capital (lead), FFormus Capital, LLightbank, MMangusta Capital, NNorthwestern Mutual Future Ventures, YY Combinator
Source: fundraisingfox.com
November 6, 2023
X account created
December 16, 2017
Website created
Date unknown
Round · $500K*
YY Combinator
Source: ycombinator.com

Founders and team

AA
Ali Akhtar Founder & CEO

LinkedIn · source: foundertrace.com
AF
Armen Forget Co-Founder & CTO

LinkedIn · source: foundertrace.com
NV
Nate Varel Vice President, Operations

Investors

Companies like Letter AI

DDefinic$2.9M Seed · Jun 2026
GGongSeries B+ · Oct 2025
NNetomi$110M Series B+ · Apr 2026
GGTM Buddy$2M Seed · Sep 2021
MMindTickleSeries B+ · Aug 2024
MMendoSeries A · Jun 2026

Other companies backed by Battery Ventures

BBay$37M Series A · Nov 2026
MMiter$40M Series B+ · Sep 2026
GG5 Labs$14M Seed · Sep 2026
FFlash$28.8M Series B+ · Aug 2026
RRillet$100M Series B+ · Aug 2026
AAegis AI$36M Series A · Aug 2026

Battery Ventures portfolio →

Sources and API

Every amount links to the page it came from. * Estimated from an accelerator's published standard deal, not a company-specific disclosure. How Recent Funding sources and verifies funding data. The same data as JSON: /api/v1/companies/letter-ai (get a free API key).