lettrs Inc
lettrs Inc is a mobile messaging platform that enables consumers to send handwritten-style digital letters verified by patented SignID biometric signatures, serving 2M+ users across 171 countries through a freemium model with licensing and advertising revenue, now pivoting to an AI-powered successor product called Musist.
- Company typePrivate
- Founded2013
- HeadquartersCollinsville, United States
- Headcount—
- GTM typeB2C
- OfferingSoftware
What lettrs Inc does
lettrs Inc is a mobile messaging platform founded in 2013 by Drew Bartkiewicz, a West Point graduate and Gulf War veteran. The company's core product is a social messaging application that allows users to send and receive handwritten-style digital letters, anchored by patented biometric signature technology (SignID) that authenticates each user's identity at the point of composition. The platform supports 80 languages and operates across 171 countries, having accumulated 2M+ downloads, 6B+ data calls, and 12B+ API calls.
The technology stack centers on the SignID biometric signature system, supplemented by two additional patents covering timing and mobile biometric authentication. The business model is freemium at the consumer level, with additional revenue streams from transaction fees, advertising, and IP licensing. Strategic partnerships include an exclusive digital autograph agreement with the MLB Players Association (signed December 2016), positioning the platform in the verified-content and sports-fan engagement vertical. The company is in transition to Musist, a next-generation AI-powered product, though no technical details of the AI architecture have been disclosed.
Headquartered in Collinsville, CT (with a New York City office), lettrs has operated with minimal disclosed capital — a single $1.5M seed round from military veteran investors in October 2014. The company has no disclosed revenue and has not raised institutional venture funding. The company has been recognized in Forbes' Top 25 Veteran-Founded Startups, Goldman Sachs' Top 100 Most Intriguing Entrepreneurs, and Google Play Best App 2014.
lettrs Inc firmographics
Firmographics- Name
- lettrs Inc
- Legal name
- lettrs, Inc.
- Website
- https://lettrs.com
- Company type
- Private
- Founded year
- 2013
- Operating status
- Operating
- Short description
- lettrs Inc is a mobile messaging platform that enables consumers to send handwritten-style digital letters verified by patented SignID biometric signatures, serving 2M+ users across 171 countries through a freemium model with licensing and advertising revenue, now pivoting to an AI-powered successor product called Musist.
- Ownership category
- akta.pro rank
lettrs Inc industry classification
Industry- Product category
- Mobile Messaging Software
- akta.pro primary industry
- Decentralized Identity (DID) & Verifiable Credentials (BPAMAEAJ)
Keywords
Where lettrs Inc is headquartered
LocationHeadquarters
- HQ city
- Collinsville
- HQ country
- United States
- HQ region
- North America
Offices2 records
Markets served
lettrs Inc business model
Business model- GTM type
- B2C
- Offering type
- Software
- Cost components
- Personnel, Technology or R&D, Marketing or Sales, Operations, Infrastructure
Revenue model
- Digital Letter Delivery: Premium features for composing and sending digital or physical letters with handwriting styling and special PO Box numbers for power users
- Physical Mail Delivery: USPS mail delivery service where users can send physical letters through the app, generating transaction fees
- SocialStamps for Advertisers: Branded stamp features for advertisers and charities, including the Women of Note collection and celebrity integrations
- Digital Autographs (MLBPA): Exclusive network for MLB Players mobile and social autographs, generating revenue through digital memorabilia and fan engagement
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Pay-as-you-go | Free access to core messaging features |
| Subscription | Monthly | Premium/Musist Experience |
Go-to-market motion2 records
Distribution channels4 records
Marketing channels5 records
lettrs Inc product offering
Product offeringCore offering
lettrs operates a mobile messaging platform (iOS and Android) that enables users to compose, sign, and send long-form digital letters with an authentic handwriting feel, including certified biometric digital signatures (SignID) and USPS physical mail delivery. The platform additionally offers SocialStamps for advertiser and charity campaigns and an exclusive MLB Players Association channel for digital autographs. A next-generation AI-powered successor called Musist is in development.
Product overview
lettrs Inc offers a social messaging platform anchored by the lettrs mobile app, which transforms smartphones into personal writing desks for composing handwritten-style letters. The platform comprises the core lettrs App (available on iOS and Android), the upcoming AI-powered Musist platform, SocialStamps for branded visual communication, and the patented SignID biometric signature technology for certified digital autographs. The ecosystem supports 80-language translation and integrates both digital delivery and physical USPS mail options.
Differentiator
Problem solved
Functional benefit
Products and services
- lettrs App Mobile social messaging app available on iOS and Android that transforms smartphones into personal writing desks for composing, signing, and sending personalized letters with an authentic handwriting feel; supports 80-language translation and certified digital signatures.
- SignID (Certified Digital Signatures) Patented biometric mobile signature technology that provides certified digital signatures across all classes of mobile communications and media, including the exclusive MLB Players Association digital autographs channel.
- SocialStamps Digital postage stamp feature inside the lettrs platform that blends visual stamps with social engagement, used by advertisers and charities (e.g., Women of Note collection) for branding and fundraising.
- Musist AI-powered next-generation messaging platform that builds on the original lettrs experience, currently in development as the successor to the lettrs app.
Quantifiable outcome
- 12 billion+ API calls since inception
- +3 more outcomes
Companies that use lettrs Inc
Customer profileNamed customers6 records
Segments4 records
Ideal customer profiles3 records
lettrs Inc technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
AI capability1 record
Feature4 records
lettrs Inc partnerships and signals
Strategic signalPartnerships
Six partnerships are on record, tiered flagship, core and minor.
- Major League Baseball Players Association (MLBPA)flagshipIn December 2016, lettrs signed an exclusive deal with MLBPA to become the exclusive network of MLB Players mobile and social autographs. The partnership brought digital fan mail and autographs to baseball fans, combining lettrs' certified signature technology with professional sports memorabilia.
- NBA Players AssociationcorePro basketball players boosted their mobile game through digital fan mail, with players like Gary Harris writing personalized letters to fans and Jordan Clarkson connecting with Gilas Pilipinas supporters.
- Vint Cerf (Internet Pioneer)coreVint Cerf, father of the internet, turned to lettrs for global perspectives on the future of the internet, providing legitimacy and thought leadership to the platform's vision for meaningful digital communication.
- RelativityminorHollywood studio Relativity partnered with lettrs for successful film integrations, including the world premiere of movie 'Love, Her' which was based on the mobile app.
- Paulo CoelhocoreWorld-renowned author Paulo Coelho joined lettrs in March 2015, adding SMS delivery capabilities and collaborating on platform content. Coelho, described as a padrinho (godfather) to the platform, helped expand the company's literary and cultural reach.
- United Way of New York CityminorUnited Way of New York City leveraged lettrs' SocialStamps for fundraising campaigns, using the platform's unique stamp-based social features for charitable giving.
Scale indicators5 records
Recent moves6 records
Expansion highlights4 records
lettrs Inc competitors and assessment
Company assessmentBroad incumbents
- WhatsApp: Dominant global mobile messaging platform owned by Meta. Comparable to lettrs as a mobile messaging destination, though WhatsApp operates at billions-of-users scale and lacks lettrs' long-form, certified-signature, and physical-mail positioning.
- Panini: Major sports memorabilia and trading card company with authenticated athlete autographs. Comparable to lettrs' MLBPA digital-autographs thesis as a legacy incumbent in the verified sports-memorabilia category lettrs is digitizing.
Direct peers
- Autograph: Tom Brady-founded digital collectibles and autographs platform. Directly comparable to lettrs' MLBPA digital-autographs offering, as both monetize verified athlete signatures and memorabilia digitally — Autograph leans on blockchain/NFTs while lettrs uses SignID.
- Telegram: Cloud-based mobile and desktop messaging platform with global reach and broadcast channels. Comparable to lettrs in mobile messaging distribution and large-network effects, though Telegram operates at hundreds-of-millions scale.
- Signal: Privacy-focused messaging app with end-to-end encrypted communications. Comparable to lettrs as a mobile messaging alternative emphasizing quality and authenticity over disposable messages, though Signal is non-commercial and open-source.
- Cameo: Personalized video-message marketplace connecting fans with celebrities and athletes. Closely comparable to lettrs' celebrity/athlete fan-engagement use case (MLBPA, NBA players), with Cameo representing the dominant monetization template for personalized celebrity content.
- Touchnote: Mobile app that lets users send physical postcards and cards from their phone, blending digital composition with real-world mail delivery. Comparable to lettrs' hybrid digital-plus-USPS letter model and its mindful long-form messaging positioning.
- Letterstream: Cloud platform for sending personalized physical letters, postcards, and mailings at scale via USPS integration. Comparable to lettrs' USPS-driven physical-mail revenue stream, though Letterstream focuses on enterprise/business mailings versus consumer messaging.
- Sincerely (Sincerely Inc): Mobile gifting and postcard platform that shipped physical mail from smartphones. Comparable to lettrs' digital-to-physical mail model and its positioning of mobile devices as personal writing desks.
Emerging players
- Memmo: Marketplace for personalized video messages from creators and athletes. Comparable to lettrs' celebrity-fan-engagement thesis (MLBPA, NBA, Paulo Coelho) as a parallel model of monetizing personalized content from public figures.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat3 records
Key risks6 records
Key highlights6 records
Customer concentration
lettrs Inc social profiles
Digital presencelettrs Inc financial estimates
Financial estimateRevenue estimate
Valuation estimate
lettrs Inc leadership team
Management profileNumber of profiles
Profiles1 record
lettrs Inc funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
lettrs Inc M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about lettrs Inc
What does lettrs Inc do?
lettrs operates a mobile messaging platform (iOS and Android) that enables users to compose, sign, and send long-form digital letters with an authentic handwriting feel, including certified biometric digital signatures (SignID) and USPS physical mail delivery. The platform additionally offers SocialStamps for advertiser and charity campaigns and an exclusive MLB Players Association channel for digital autographs. A next-generation AI-powered successor called Musist is in development.
Is lettrs Inc a public or private company?
lettrs Inc is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was lettrs Inc founded?
lettrs Inc was founded in 2013.
Where is lettrs Inc based?
lettrs Inc is headquartered in Collinsville, United States, in the North America region.
How does lettrs Inc make money?
Four revenue lines are on record. Digital Letter Delivery is the primary driver. The others are physical Mail Delivery, socialStamps for Advertisers and digital Autographs (MLBPA).
Who are lettrs Inc's main competitors?
Broad incumbents on record are WhatsApp and Panini. Direct peers are Autograph, Telegram, Signal, Cameo, Touchnote, Letterstream and Sincerely (Sincerely Inc). Memmo is listed as an emerging player.
Does lettrs Inc have an API?
No public API is recorded for lettrs Inc.
What industry is lettrs Inc in?
lettrs Inc's product category is Mobile Messaging Software. Its primary akta.pro industry code is BPAMAEAJ, Decentralized Identity (DID) & Verifiable Credentials.