Enterprise Multi-Model AI Chat Platform with Credit-Based Billing
An organization needed a unified platform for teams to access multiple AI models (GPT, Claude, Gemini, Grok, Perplexity) with enterprise-grade security, usage tracking, and cost management.
Discuss Your Project
The Challenge
Teams were using multiple AI tools with no centralization or cost control:
- Each team member had separate subscriptions to different AI providers
- No unified conversation history or knowledge sharing across the organization
- No visibility into AI usage costs or per-user consumption
- Enterprise security and GDPR compliance requirements couldn't be met with consumer tools
- Comparing model outputs required switching between multiple interfaces
Our Solution
We built a production-grade multi-model AI chat platform with credit-based billing, role-based access control, and GDPR compliance.
Architecture
- Frontend: React 18 + TypeScript + Vite with Tailwind CSS
- Backend: Node.js/Express with TypeScript and Prisma ORM
- Database: PostgreSQL (60+ tables) with Redis caching
- Auth: AWS Cognito with JWT-based RBAC
- Billing: LemonSqueezy with credit-based consumption tracking
- Queue: BullMQ for background job processing
- Infrastructure: AWS (ECS/Fargate, RDS, ElastiCache, S3, KMS, SES)
AI Integrations
- OpenAI GPT models
- Anthropic Claude models
- Google Gemini models
- xAI Grok models
- Perplexity for web search
- Suno for AI music generation
Key Features
- Multi-Model Chat - Switch between AI providers per conversation
- Split-Screen Comparison - Side-by-side model output comparison
- Workflow Automation - LangGraph-powered step-by-step AI workflows
- GPT Marketplace - Discover, create, and share custom GPTs
- Artifacts - Sandboxed code/HTML preview within conversations
- Credit System - Pay-per-use with automatic refills and admin grants
- GDPR Compliance - Automated deletion, data export, AES-256-GCM encryption
- Content Moderation - Flagging system with auto-triage for inappropriate content
- Group Chat - Multiple AI participants in a single conversation
- Web Search - Perplexity integration for grounded, up-to-date responses
Results
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