What Fellow does

Fellow is a mobile-first social community application operated by Sunday LLC, a Delaware-registered company headquartered in Mountain View, California. The platform enables users to connect with others both online and in-person (IRL) through four integrated feature modules: Circles (community spaces organized around shared interests supporting up to 250,000 members with public, private, or secret visibility), Lines (direct and group messaging with capacity for up to 10,000 participants per conversation), Events (public, private, or Circle-only event creation with RSVP management), and Groups (sub-communities within Circles). Free individual accounts form the broad user base, while monetization flows through two channels: Organization Premium subscriptions at $9.99/month or $99/year for businesses and nonprofits, and Circle creator paid subscriptions ranging from $1 to $999/month where Fellow retains a 15% platform fee and pays 85% to creators via Stripe Connect.

The technical architecture is built on commodity cloud infrastructure: Firebase (Google Cloud) handles authentication, real-time database, file storage, and cloud functions, while Stripe and Stripe Connect process payments. The mobile apps are developed using React Native with the Expo framework, enabling cross-platform iOS and Android deployment from a single codebase. Distribution is exclusively through the Apple App Store and Google Play Store, with a product-led growth motion relying on direct self-serve downloads and minimal paid marketing.

Fellow targets a horizontal consumer segment as its primary market, with a secondary paid segment of organizations and content creators seeking community monetization. Geographic scope spans the United States, European Economic Area, United Kingdom, and Switzerland, with GDPR, CCPA, and COPPA compliance built in. The company operates with 1-10 employees and has no disclosed institutional funding for its current entity, though a $120,000 Y Combinator investment from August 2016 appears in the source data alongside a conflicting working-capital-fintech description that does not match the current product.

Name

Fellow

Legal name

Sunday LLC

Website

https://joinfellow.com

Company type

Private

Founded year

2025

Operating status

Operating

Headcount range

1–10 employees

Short description

Fellow is a mobile social community app that lets individual users join interest-based Circles, message via Lines, and organize Events, while monetizing through Organization Premium subscriptions and paid Circle creator subscriptions with a 15% platform fee.

Ownership category

akta.pro rank

Product category

Social Networking / Community Mobile App

akta.pro primary industry

Interest-Based Communities & Forums (BPAMABAC)

Keywords

• Social networking app
• Community platform
• Mobile messaging
• Event management app
• Creator monetization

Headquarters

HQ city

Mountain View

HQ country

United States

HQ region

North America

Markets served

GTM type

B2C

Offering type

Software

Cost components

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

Revenue model

1. Organization Premium Subscriptions: Paid subscriptions for organization accounts (businesses, nonprofits) at $9.99/month or $99/year, providing enhanced organizational features and profile capabilities. Revenue is recurring and processed through Apple App Store or Google Play Store.
2. Circle Creator Subscriptions: Circle owners can offer paid subscriptions ($1-$999/month) for exclusive content access. Fellow retains 15% platform fee, with 85% paid to Circle creators via Stripe Connect. Subscriptions auto-renew unless cancelled.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels2 records

Core offering

Fellow is a mobile-first social community application (iOS and Android) operated by Sunday LLC that enables users to connect online and in person (IRL). The platform combines community groups (Circles with up to 250,000 members), direct and group messaging (Lines), event creation/RSVP management, and sub-group organization (Groups). It monetizes through optional premium subscriptions for organizations ($9.99/month or $99/year) and a 15% platform fee on creator-led paid Circle subscriptions ($1–$999/month).

Product overview

Fellow is a single unified social community mobile application (iOS and Android) designed to help users connect with their fellows both online and IRL. The platform integrates four core interconnected features: Circles (community spaces for shared interests), Lines (private and group messaging), Events (creation and RSVP management), and Groups (sub-groups within Circles). The app also offers Organization Premium Accounts as a paid tier for businesses and nonprofits at $9.99/month or $99/year. Circle owners can monetize their communities through paid subscriptions ($1-$999/month) with Fellow retaining a 15% platform fee.

Differentiator

Problem solved

Functional benefit

Products and services

• Fellow Mobile App A mobile-first social community application available on iOS and Android that helps individual users connect with others online and in-person (IRL). It integrates community groups (Circles), messaging (Lines), event creation/RSVP management, and sub-group organization (Groups) into a single product for consumers seeking meaningful social connections and niche community participation.

Segments2 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration5 records

Feature5 records

Partnerships

Four partnerships are on record, tiered core.

• Firebase (Google Cloud)coreTechnology or IntegrationFirebase provides authentication, real-time database, file storage, and cloud functions for the Fellow platform. User account data, content, and media files are stored and managed through Firebase infrastructure. Firebase security rules control data access.
• StripecoreTechnology or IntegrationStripe processes payment transactions for Circle creator subscriptions and organizational premium accounts. Circle owners must establish Stripe Connect accounts to receive revenue share payments. Stripe is PCI-DSS compliant for payment processing.
• Apple App StorecoreChannel Partner/ Reseller/ DistributorApple processes in-app purchases and subscription management for iOS users. Purchase receipts and subscription status are shared with Fellow for access control. Apple App Store terms govern transaction processing.
• Google Play StorecoreChannel Partner/ Reseller/ DistributorGoogle Play Store handles in-app purchases and subscription management for Android users. Provides purchase receipts and subscription status to Fellow for access control.

Recent moves5 records

Expansion highlights4 records

Emerging players

• Luma: Events-first community platform with discovery, RSVPs, and lightweight community features — overlaps Fellow's Events surface and serves similar community-orchestrator use cases.

Direct peers

• Mighty Networks: Community-as-a-service platform that lets creators and brands launch paid membership communities with events, courses, and content — directly comparable to Fellow's Circle subscriptions + Organization Premium model.
• Discord: Massive-scale interest-based communities with persistent text, voice, and event-style channels. Operates at far larger scale than Fellow but competes for the same group/community use case.
• Geneva: Mobile-first community platform offering groups, messaging, voice rooms, and events — the closest functional analog to Fellow's Circles + Lines + Events bundle, especially for clubs and organized communities.
• Circle: Paid community platform for creators and operators with groups, discussions, events, and member subscriptions — overlaps Fellow's creator-monetization and Circle subscription mechanics.
• Amino Apps: Interest-based mobile community networks organized around topics (anime, gaming, etc.) with chat, posts, and member tiers — analogous to Fellow's Circles positioning around shared interests.

Broad incumbents

• Slack: Channel-based messaging and community-of-practice platform owned by Salesforce — comparable to Fellow's Lines for group communication and Circles for organized groups, but skewed toward workplace use cases.
• Telegram: Global messaging platform with very large groups, channels, and basic community tooling — overlaps Fellow's Lines + Circles for community-style use cases, but at vastly greater scale.
• Facebook Groups: Meta's interest-based group product embedded in the Facebook ecosystem — the dominant incumbent for the type of large public/private community Circles emulate, with deep incumbency advantages.
• WhatsApp Communities: Meta's messaging app with multi-group Community features — competes with Fellow's group messaging and event-related announcements for users who already coordinate via WhatsApp.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds1 record

Investors1 record

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 Fellow