Build Logs & SaaSWICHI
Railway + Supabase Operational Review
Operational review of WICHI's backend on Railway and Supabase, covering real-world incidents like connection pooling and migration conflicts, plus criteria for infrastructure migration.
WICHI
20 postsA GEO (Generative Engine Optimization) SaaS that measures and optimizes brand visibility across AI search engines (ChatGPT, Gemini, Perplexity, Claude). A build log from a hackathon rejection to production.
Records key decisions chronologically — 9-Bucket framework, multi-engine architecture, GEO Score metrics, infrastructure transitions. Covers the operational limits of a one-person SaaS as well.
A useful case for builders shipping their own GEO SaaS, engineers handling multi-engine data, and analysts reviewing metric design in the AI search market.
Build Logs & SaaSWICHI
GEO Score 4-Layer Metric Design
Analysis of the design philosophy and hierarchical dependencies of the four GEO Score layers (Inclusion, Prominence, Quality, Stability), and their implications for decision-making.
Build Logs & SaaSWICHI
Designing the 9-Bucket Query Framework
Documentation of WICHI's 9-Bucket query framework. Defines 3 Zones and 9 Buckets based on brand presence to measure AI's organic recommendations effectively.
All Posts
Build Logs & SaaSWICHI
Railway + Supabase Operational Review
Operational review of WICHI's backend on Railway and Supabase, covering real-world incidents like connection pooling and migration conflicts, plus criteria for infrastructure migration.
Build Logs & SaaSWICHI
GEO Score 4-Layer Metric Design
Analysis of the design philosophy and hierarchical dependencies of the four GEO Score layers (Inclusion, Prominence, Quality, Stability), and their implications for decision-making.
Build Logs & SaaSWICHI
Designing the 9-Bucket Query Framework
Documentation of WICHI's 9-Bucket query framework. Defines 3 Zones and 9 Buckets based on brand presence to measure AI's organic recommendations effectively.
Build Logs & SaaSWICHI
Multi-Engine Architecture — Parallel Collection from 3 AI Search Engines
Analysis of multi-engine architecture design principles that leverage response variance as signals, featuring parallel collection structures and scalability via the adapter pattern.
Strategy & EconomicsWICHI
GEO Paper Review: Evaluation Systems and Manipulation Risks
Review of SAGEO Arena and CORE papers, analyzing the need for integrated GEO evaluation frameworks and the vulnerability of AI search rankings (91.4% Top-5 manipulation success rate).
Strategy & EconomicsWICHI
GEO Paper Review: Optimization Approaches and Vertical Applications
Review of AutoGEO (quality-preserving auto-optimization) and E-GEO (e-commerce vertical benchmark) papers, analyzing how GEO optimization seeks a Pareto optimal between visibility and utility.
Strategy & EconomicsWICHI
GEO Paper Review: Definition and Foundational Frameworks
Review of the KDD 2024 GEO paper and Chen et al. 2025. Covers the academic definition of GEO, the PAWC visibility metric, and AI search's preference for earned media.
Build Logs & SaaSWICHI
Six GEO Business Opportunities and WICHI's Choice
Strategic analysis of three opportunity factors in the AI search (GEO) market and why WICHI chose 'SaaS-based monitoring' over advertising or agency models.
Strategy & EconomicsWICHI
HubSpot, Semrush, Adobe, and Conductor Enter GEO — How Incumbents Are Moving
Analysis of major players entering the GEO market (SearchGPT, Perplexity, Google AI Overviews), their response characteristics, and step-by-step response strategies for enterprises.
Strategy & EconomicsWICHI
GEO Agency and Consulting Market Overview
Analysis of four revenue models in the GEO agency and consulting market, risk mitigation strategies for search engine updates, and the necessity of transitioning to tech-driven SaaS.
Strategy & EconomicsWICHI
GEO SaaS Landscape — Profound, Scrunch, Peec and 10 More Players
Comparative analysis of 10 major GEO SaaS players (Profound, Scrunch, Peec, etc.) covering features, pricing, and targets to derive WICHI's strategic positioning.
Strategy & EconomicsWICHI
SEO Ecosystem vs GEO Ecosystem — Value Chain Comparison
Predicting the 5-stage GEO value chain based on 20 years of SEO history, analyzing business opportunities and preemptive strategies for infrastructure, analytics, and specialized media.
Build Logs & SaaSWICHI
Prototype to Production — The Complete Change List
10 key changes for transitioning an MVP to commercial SaaS: security hardening, JWT auth, KO/EN i18n, and payment automation to build a 'payment-ready' service.
Build Logs & SaaSWICHI
Jocoding Hackathon Build Log — Building a GEO SaaS in 3 Days
Recording the 3-day MVP build for WICHI during the Jocoding Hackathon, covering tech stack choices (FastAPI, React, Supabase) and priorities for creating a 'working product' under tight deadlines.
Strategy & EconomicsWICHI
AI Search Engine Comparison: ChatGPT Search, Perplexity, AI Overviews
Comparative analysis of ChatGPT Search, Perplexity, and Google AI Overviews on accuracy, speed, and cost, with optimal engine recommendations for each query type.
Strategy & EconomicsWICHI
GEO Definition and Structural Differences from SEO
Definition of GEO and its six structural differences from SEO. Proposes a new framework for brand visibility in an environment where AI search provides answers instead of link clicks.
Agents & ArchitectureWICHI
LLM-as-Judge — Evaluating AI Responses with AI
Analysis of the LLM-as-Judge pattern for evaluating AI response quality, featuring multidimensional metric design, reliability verification, and strategies for position and verbosity bias.
Build Logs & SaaSWICHI
Lemon Squeezy vs Stripe — A Korean Solo SaaS Builder's Comparison
Comparative analysis of Lemon Squeezy (MoR) and Stripe for Korean solo SaaS builders, providing a practical guide on global tax compliance, fees, and business registration.
Build Logs & SaaSWICHI
After Hackathon Rejection — Pivoting to Independent SaaS
Recording the 24-hour pivot of WICHI to an independent SaaS after a hackathon rejection, covering i18n implementation, SEO setup, and monetization roadmap restructuring.
Build Logs & SaaSWICHI
Lovable to Vercel — Frontend Migration Record
Migration from Lovable ($25/mo) to Vercel ($0) including build pipeline reconfiguration, documenting the frontend hosting transition process.