Fundraising Fox

Letter AI

YC S23

Chicago, US · Founded 2023 · 70 employees · Hiring · 8 known investors

Find your way into Letter AI

814 people in our graph share verified history with the Letter AI team — schools, employers, funds. One of them is your warm intro.

Kike Mirallesunlockedknows Ali Akhtar · together at McKinsey & Company (overlapped)
knows the team · via Samsara
×8knows the team · via McKinsey & Company
knows the team · via Obama for America
knows the team · via Northside College Preparatory High School

Letter AI provides an AI-native revenue enablement platform for sales and GTM teams, delivering personalized content, training, coaching, and buyer engagement tools. The platform combines generative AI with company-specific data to help revenue teams improve deal cycles and win rates.

Also known as Tractatus AI

AI & Machine LearningEnterprise SoftwareFuture of WorkSaaSSales TechUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (S23)

Letter AI was founded in 2023 by Ali Akhtar and Armen Forget.

AAAli Akhtar
Ali AkhtarinFounder & CEOAli Akhtar held roles including VP of ML Products at project44, ML Engineering Director at Samsara, and worked as an AI consultant at McKinsey, bringing over a decade of experience in artificial intelligence and enterprise software.
AFArmen Forget
Armen ForgetinCo-Founder & CTOSoftware engineer with experience in military and aerospace, followed by work in distributed systems and ML operations, now building generative AI tools for enterprise customers.

Investors · 8

Battery VenturesBoston · $500K – $100M
Formus Capital
Stage 2 CapitalLincoln · $200K – $4M
Y CombinatorSan Francisco · $500K
Lightbankreported · 2 sourcesChicago · $500K – $5M

Also in the syndicate · 3

FormusMangustaNorthwestern Mutual Future Ventures

Funding

SEC filings, press & company announcements

$50.6M disclosed across 2 of 3 rounds · 2025–2026

Source: company announcements and press reports — follow each round's link for the claim.

Images

Letter AI photo

Competitors · 4

by search overlap
Grammarly62 shared keywordsGrammarly is an AI-powered writing assistant that helps users write with clarity and confidence across over 1 million apps and websites. The platform serves professionals, students, and teams through free and premium versions, and uses natural language processing to refine tone, suggest rewrites, and improve communication effectiveness.
Quillbot60 shared keywordsQuillBot provides an AI-powered workspace with tools for writing, paraphrasing, design, and visual generation, letting users brainstorm, research, and produce documents and presentations. It serves writers, students, educators, and professionals for tasks such as content creation, resumes, briefs, and reports.
Canva56 shared keywordsDesign platform; Blackbird invested when it was just an idea and in every round since.
Simplified50 shared keywordsSimplified offers Riley, an AI marketing assistant that plans, creates, publishes, and reports on marketing content, with the user approving work before it ships. It targets founders and lean teams who want to run marketing without hiring a dedicated team.

Companies competing with Letter AI for the same Google search keywords, organic and paid, via search-intersection analysis.

In the news

Chicago AI startup Letter raises $40M - Crain's Chicago Businesschicagobusiness.com · Feb 2026Sales startup Letter AI snags $40 million Series B four months after its last raise. Read its pitch deck.businessinsider.com · Feb 2026Letter AI Raises $40M Series B to Bring Deal-Level Intelligence to Revenue Enablementfinance.yahoo.com · Feb 2026Letter AI raises $10.6M Series A to bring generative AI to revenue teams — TechNexus Connecttechnexus.com · Oct 2025Letter AI secures over $10 million as customer base grows 15xamericanbazaaronline.com · Oct 2025The Next Chapter: Letter AI Raises Series A Funding to Help Revenue Teams Thriveletter.ai · Oct 2025Ushering in a new era of AI-powered revenue accelerationletter.ai · Jun 2024📈 Letter AI - Personalized and up-to-date sales enablement, built 10X faster with AIycombinator.com · Jul 2023

Frequently asked questions

What does Letter AI do?
Letter AI provides an AI-native revenue enablement platform for sales and GTM teams, delivering personalized content, training, coaching, and buyer engagement tools. The platform combines generative AI with company-specific data to help revenue teams improve deal cycles and win rates.
Who founded Letter AI?
Letter AI was founded by Ali Akhtar, Armen Forget in 2023.
Who are Letter AI's investors?
Letter AI's investors include Battery Ventures, Formus Capital, Stage 2 Capital, Y Combinator, Lightbank.
How much funding has Letter AI raised?
Letter AI has disclosed $50.6M raised across 2 of its 3 known rounds.
Where is Letter AI headquartered?
Letter AI is headquartered in Chicago, US.