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Case study · AI Colosseum

Building AI Colosseum, a multi-AI orchestration platform.

How we built a comprehensive AI orchestration platform that unifies 16 models across 9 providers, Round Table multi-AI consensus, multi-agent Workflows, the flagship AI Visibility Audit, and the Naturalize voice-matching editor — all served from a Neon Postgres backend on Google Cloud Run.

16
AI models
5
Subscription tiers
22
Postgres tables
10K+
Active users
Client
AI Colosseum
Industry
AI / SaaS Platform
Services
Full-stack development
The challenge

A fragmented AI landscape.

Users juggle multiple subscriptions, learn different interfaces, and manually compare outputs when they need the best answer. Enterprises need compliance, team features, and cost control — but existing solutions offer none of this.

Pain points identified

What's broken

  • Multiple AI subscriptions ($100+/month combined)
  • No way to compare model outputs side-by-side
  • No idea what AI models say — or recommend — about your business
  • No collaboration features for teams
  • Context lost in long conversations

Goals defined

What we built

  • Single subscription for all major AI models
  • Multi-AI discussions for better answers
  • An AI Visibility Audit that shows what AI knows about you
  • Enterprise-ready with team workspaces
  • Intelligent context management
Our solution

A unified AI orchestration platform.

Designed and built from the ground up — a full-stack SaaS platform that orchestrates multiple AI providers through a unified, intuitive interface.

01

Multi-Model AI Chat (16 Models)

Unified interface across 9 standard models (ChatGPT, Claude, Gemini, Mistral, Perplexity, Grok, DeepSeek, Llama, Cohere) plus 7 premium variants (GPT-4o, Claude 3.5 Sonnet, Gemini Premium, Mistral Premium, Perplexity sonar-pro, Llama 70B-Turbo, Cohere Command R+). Premium models never silently degrade.

  • Real-time WebSocket streaming with sticky model header
  • Image vision support across all providers
  • Multimodal file uploads — code, docs, images
  • Automatic failover with provider-specific cooldowns
02

Round Table + Workflows

Round Table runs models in parallel or sequence with consensus voting; tier-scaled (Pro 3×3, Colosseum 5×5). Workflows orchestrates multi-agent pipelines (sequential, parallel, conditional) with a public marketplace and templates.

  • Round Table presets: Code Review Panel, Essay Editor, Debate Club
  • Workflows marketplace with trending algorithms
  • Dynamic credit calculation by token usage
  • Team collaboration on shared workflows
03

Naturalize (Voice Matching)

Rewrites AI drafts to match the user’s own writing voice, with graded output (D to A+) and an iterative "Deep" refinement mode. Single-pass with a Refine Again button. Tier-restricted: 5/month for Starter, unlimited for Colosseum.

  • Grade-based rewrites (A+, A, B+, B, C, D)
  • 4 tone options: Academic, Professional, Casual, Creative
  • Deep mode for iterative voice refinement
  • Vision surcharge for image-input transformations
04

AI Visibility Audit

The flagship feature: checks what 9 AI models actually know about a business — whether they recognize it, recommend it unprompted, describe it accurately, and its share of voice vs competitors — plus an AEO/GEO site-readiness score.

  • "Does AI know your business?" across 9 models
  • AEO/GEO site audit (AI-crawler access, schema.org, llms.txt)
  • "Get Known" action plan + paste-ready schema/llms.txt/FAQ assets
  • Trend tracking + scheduled re-audits with email alerts
05

5-Tier Subscription System

Stripe-powered billing across Free (100 credits), Starter ($9.99 / 500), Pro (2,000), Colosseum (10,000), and Enterprise (unlimited). Model-specific credit multipliers, automatic renewal, and team-based access elevation.

  • 5 tiers — Starter $9.99 added April 2026 below Pro
  • Team-based model access elevation (members inherit owner perks)
  • Credit pooling across team members
  • Token-based team invitations with status tracking
Technical architecture

Stack and infrastructure.

Frontend stack

  • Next.js 15.5 with App Router & Turbopack
  • React 19.1 with concurrent features
  • TypeScript strict mode
  • Tailwind CSS 3.4
  • React Virtuoso 4 for 10K+ message virtualization
  • Sticky model header, view modes (Full / Compact / Tabbed)

Backend stack

  • FastAPI (Python) with async/await
  • WebSocket for real-time streaming
  • Neon Postgres via asyncpg (migrated from Firestore April 2026)
  • Google Cloud Run for serverless hosting
  • Stripe for 5-tier subscriptions and webhook ingestion
  • GPTZero API for live AI-detection scoring
Database migration · 2026-04

Firestore → Neon Postgres.

In April 2026 we completed a full migration from Firestore to Neon Postgres with asyncpg. The 22-table relational schema gives stronger ACID guarantees, cleaner team / credit / subscription joins, and serverless pricing aligned with our Cloud Run + Vercel deployment topology. In-memory conversation caching was removed in favor of direct DB queries to avoid staleness across multi-instance deployments.

Technical highlights

Built for scale.

Responsive design

Fully responsive interface that works on desktop, tablet, and mobile.

Security first

Strict CSP, JWT auth, Google OAuth, and encrypted data at rest and in transit.

Performance optimized

Turbopack builds, virtualized lists for 10K+ messages, optimistic UI updates.

Built to scale

Serverless Cloud Run auto-scales to demand, Postgres handles millions of rows.

The results

Real impact, both sides.

For users

  • Single subscription replaces 5+ AI services
  • 60% faster research with multi-AI collaboration
  • See exactly what AI models say and recommend about your brand
  • Unlimited conversation history & organization

For business

  • Recurring SaaS revenue model
  • Enterprise pipeline for large deals
  • Low operational costs with serverless
  • Scalable architecture handles 10x growth
Built with

Technology stack.

Next.js 15.5React 19TypeScriptTailwind 3.4FastAPIPythonGoogle Cloud RunNeon PostgresasyncpgStripeGPTZeroWebSocket Streaming
Try it live

Want to try AI Colosseum?

Compare 16 AI models in one platform with Round Table consensus, multi-agent Workflows, the AI Visibility Audit, and Naturalize voice matching. Or contact us to discuss building a similar platform for your business.

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