Sincerely

What Sincerely does

Sincerely, operated by Intonation Studios Inc., is a consumer mental-wellness mobile application that facilitates anonymous letter exchange between users. Founded in 2022 and headquartered in New York, the company targets individual consumers seeking emotional support and a confidential channel to express themselves; its positioning explicitly addresses feelings of isolation. The core product, "Sincerely - Anonymous Letters" (also listed as "Sincerely - Off My Chest" on the App Store), delivers three anonymous letters to each subscriber every night, with users able to post comments and reactions while preserving anonymity. Distribution is exclusively through the Apple App Store (iOS only), and the company supplements in-app engagement with a Discord community.

The underlying platform is a mobile application that pairs anonymous senders and receivers, collects user-generated content and reactions, and processes recurring subscription billing. The technology stack is described only at a high level — a mobile app mediating letter exchange — with no disclosed proprietary AI, model, or API surface, and no SDK or MCP integrations referenced. The business model is a monthly subscription sold self-serve through the App Store; pricing tiers are not publicly disclosed. Go-to-market is product-led growth: users discover and download the app directly, with a Discord server supporting post-sale community engagement.

Sincerely is a small, founder-stage operation (1-10 employees) that has closed one seed funding round in April 2023 from a group of investors including Sequoia Scout, Brooklyn Bridge Ventures, Gold House, Intonation Ventures, King Capital, and Untamed Ventures. The company is privately held, US-incorporated, and has no disclosed enterprise customers, partnerships, patents, or awards; its commercial footprint is a single consumer app on a single mobile platform, and its competitive position rests on brand and the anonymity mechanic rather than on disclosed technology differentiation.

Name

Sincerely

Legal name

Intonation Studios Inc.

Website

https://onsincerely.com

Company type

Private

Founded year

2022

Operating status

Operating

Headcount range

1–10 employees

Short description

Sincerely is an iOS mobile app, operated by Intonation Studios Inc., that delivers three anonymous letters nightly to subscribers seeking emotional support and anonymous peer communication. It serves individual consumers via a monthly subscription distributed solely through the Apple App Store.

Ownership category

akta.pro rank

Product category

Mental Wellness Mobile App

SIC

Telegraph & Other Message Communications (4822)

akta.pro primary industry

Community/Group Chat Platforms (BPAMACAH)

Keywords

• Anonymous messaging
• Mental wellness app
• Peer support
• Anonymous letters
• Emotional support

Headquarters

HQ city

New York

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Software

Cost components

Technology or R&D, Personnel, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Subscription Service: Users subscribe to receive 3 anonymous letters every night. The service includes account/subscription management with expiration and renewal notices, and billing and collection processes.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

Sincerely operates a mobile application platform that enables users to send and receive anonymous letters as a mental wellness and peer support service. Subscribers receive 3 personalized anonymous letters every night, with the goal of combating loneliness and allowing users to share thoughts without revealing their identity. The app is operated by Intonation Studios Inc. and distributed via the Apple App Store.

Product overview

Sincerely is a single-product mobile application platform centered on anonymous letter exchange. The core offering is the "Sincerely - Anonymous Letters" app, which delivers 3 personalized anonymous letters to users nightly. The product is available as an iOS mobile application and is operated by parent company Intonation Studios Inc.

Differentiator

Problem solved

Functional benefit

Products and services

• Sincerely - Anonymous Letters

Segments1 record

Ideal customer profiles1 record

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Recent moves4 records

Expansion highlights3 records

Broad incumbents

• Sanvello: Sanvello (an Optum product) is a mental wellness app combining peer support, coaching, and therapy. It is comparable to Sincerely in offering peer community alongside wellness tools, but operates at much larger scale with clinical integrations.
• Calm: Calm is a major consumer mental wellness app focused on meditation, sleep stories, and relaxation. It is comparable to Sincerely as a subscription mental wellness app reaching the same consumer segment, though its delivery mechanism is content rather than peer communication.
• Headspace: Headspace is a leading consumer mental wellness app offering meditation, sleep, and focus content. It is a broad incumbent in Sincerely's target market of emotional wellness consumers, but its offering centers on guided content rather than anonymous peer exchange.

Direct peers

• YikYak: YikYak is an anonymous local community app rebuilt around location-based peer conversation. It overlaps directly with Sincerely's anonymous peer messaging mechanic, although YikYak's anchor is hyperlocal community rather than emotional wellness.
• Whisper: Whisper is an anonymous social network where users share confessions and receive messages. It is a direct peer to Sincerely on the anonymity-first communication model, though Whisper is a broader social platform rather than a focused wellness product.
• Vent: Vent is a mobile app for anonymous emotional expression and peer support. It directly mirrors Sincerely's core mechanic of users posting and receiving anonymous messages about feelings, serving a similar consumer wellness audience.
• Supporti: Supporti is a peer support platform matching users with trained peer mentors for ongoing emotional support. It competes with Sincerely for the same emotionally vulnerable consumer seeking non-clinical peer connection.
• 7 Cups: 7 Cups connects users with trained listeners and peer support for emotional wellness. It is directly comparable to Sincerely as a consumer-facing peer-support platform addressing loneliness and emotional expression, with a heavier emphasis on trained listeners rather than fully anonymous peers.

Emerging players

• MindRight: MindRight is a mobile mental wellness platform providing text-based coaching and peer support, often via partnerships with insurers and schools. It overlaps with Sincerely's text-based peer support model and subscription-driven consumer wellness positioning.
• Wysa: Wysa is an AI-driven mental wellness chatbot app for consumers and employers. It is comparable to Sincerely as a mobile-first mental wellness companion with subscription revenue, though Wysa uses AI rather than anonymous human peers.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/sincerely-studios

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds1 record

Investors6 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Sincerely