Briefin

Overview

An AI stock briefing service for people who don't have time to follow the market. AI-generated briefings land at 7am, noon and 4pm each day, and ten AI analyst personas debate them live — an experience you won't find elsewhere.

Key features

AI briefing system

• Three scheduled briefings: pre-open (07:00), midday (12:00) and post-close (16:00), published automatically
• Ten AI analysts: personas with distinct investment views, debating in real time
• Multi-step research reports: plan → write sections → merge → store

Investment tools

• Real-time monitoring of 25+ global indices
• Sector heatmap and valuation analysis
• Backtesting engine: 4 strategies × 4 timeframes
• VIP auto stop-loss: real position management through the KIS API

Platforms

• Web (Vercel), Toss Apps-in-Toss, Android (Play Store), iOS (App Store)
• PWA support and FCM push notifications
• Podcast generation (TTS → Apple/Spotify RSS)

Architecture

Frontend

React 19 + Vite (web)
React + Capacitor 8 (native iOS/Android)
Toss Apps-in-Toss framework

Backend

Python 3.12 + FastAPI
PostgreSQL 16 + Redis 7
Alembic (database migrations)
WebSocket (live AI debate rooms)

AI/LLM

Google Gemini 2.5 Flash — briefing generation
Claude API — research reports and analysis
KIS API — live brokerage integration

Plans

| Plan | Features | Price | |------|------|------| | Free | Basic briefings | Free | | Premium | Ad-free plus all features | Monthly | | VIP | Strategies, auto stop-loss, 1:1 consulting | Premium |

Outcomes

• Launched on the Toss Apps-in-Toss platform
• Simultaneous iOS and Android release
• 31 pages, a complete SaaS architecture
• Briefin YouTube channel: @Briefin-g4y