AI Tech Stacks We Deal

AI Tech Stack · AXCEL Engineering

The AI Stack Behind Every Intelligent Solution We Build

From frontier language models to vector databases and workflow automation — we select, integrate, and orchestrate the world's most powerful AI tools to build production-grade intelligent systems for our clients.

Claude OpenAI Gemini LangChain n8n Pinecone Supabase Redis
Claude·OpenAI·Gemini
LangChain·LangGraph·CrewAI
n8n·Make.com·Vercel AI SDK
Pinecone·Qdrant·Weaviate
Supabase·Postgres·Redis
0 AI Tools in Stack
0 Stack Layers
0+ AI Projects Delivered
0% Production-Tested Stack
Stack Architecture

How the Layers Work Together

Every AI system we build follows a layered architecture — each tool at the right layer, solving the right problem.

Layer 1 — AI Models

Frontier language models that power reasoning, generation, and understanding across all solutions.

Claude
GPT-4
Gemini
orchestrated by
Layer 2 — Orchestration

Frameworks that chain, route, and coordinate AI models into multi-step reasoning agents and pipelines.

LangChain
LangGraph
CrewAI
automated via
Layer 3 — Automation & APIs

Workflow automation and API integration tools that connect AI to the systems businesses already use.

n8n
Make
Vercel AI SDK
searches
Layer 4 — Vector Databases

Semantic search and memory stores that power RAG pipelines, long-term agent memory, and knowledge retrieval.

Pinecone
Qdrant
Weaviate
persisted in
Layer 5 — Infrastructure & Data

The data backbone — relational storage, caching, and real-time subscriptions for production AI applications.

Supabase
Postgres
Redis
Full Stack Details

Every Tool, Explained

What each tool does, why we use it, and where it fits in our AI delivery process.

Claude

AI Model

Anthropic's Claude is our go-to model for complex reasoning, long-context analysis, and safe, controllable AI agent behavior. We use Claude 3.5 Sonnet and Claude 3 Opus for tasks requiring nuanced judgment, multi-step reasoning, and reliable output.

Document analysis Agent reasoning Long-context RAG Code generation

OpenAI / GPT-4

AI Model

GPT-4o and GPT-4 Turbo power our conversational AI products, customer-facing chatbots, and vision-enabled workflows. OpenAI's function calling and structured outputs make it the most API-flexible model for complex integrations.

Chatbots Vision AI Function calling Structured output

Google Gemini

AI Model

Gemini 1.5 Pro's 1M-token context window makes it uniquely capable for processing entire codebases, large PDFs, and hour-long video transcripts. We use it for enterprise document intelligence and multi-modal AI pipelines.

1M context window Multi-modal Document intelligence Video analysis

LangChain

Orchestration

The industry standard for building LLM-powered applications. LangChain gives us composable chains, tool use, memory management, and a massive ecosystem of integrations. We use it to build RAG systems, multi-step pipelines, and LLM-backed APIs in production.

RAG pipelines Chains & tools Memory systems LLM APIs

LangGraph

Orchestration

LangGraph extends LangChain with stateful, cyclical graph execution — the key to building truly autonomous AI agents with loops, branching, and self-correction. We use it for complex multi-agent workflows where an agent needs to evaluate its own outputs and iterate.

Multi-agent systems Stateful graphs Self-correction loops Autonomous agents

CrewAI

Orchestration

CrewAI makes multi-agent collaboration feel natural — define a crew of specialized agents (Researcher, Writer, Analyst) and have them work together on a shared objective. We use it for document research workflows, competitive intelligence pipelines, and content generation systems.

Multi-agent crews Role-based agents Research automation Task delegation

n8n

Automation

Our primary open-source automation platform. n8n lets us self-host complex AI workflows, connecting LLMs to CRMs, databases, webhooks, and 400+ integrations. We run n8n for lead qualification bots, AI-powered email routing, and multi-step AI pipelines for enterprise clients.

Self-hosted workflows AI + CRM pipelines Lead automation Email AI routing

Make.com

Automation

Make (formerly Integromat) is our cloud-native automation choice for clients who need visual, no-code AI workflows. We build AI-augmented scenarios that sync data between Salesforce, Slack, Google Sheets, and custom APIs — all triggered by AI-classified events.

No-code AI flows Salesforce sync Data pipelines Event-triggered AI

Vercel AI SDK

Automation

The Vercel AI SDK gives us a unified TypeScript interface to stream responses from Claude, OpenAI, and Gemini directly into Next.js applications. We use it for AI-powered SaaS products, real-time chat interfaces, and server-side AI generation with edge deployment.

Streaming AI responses Next.js AI apps Multi-model routing Edge AI deployment

Pinecone

Vector DB

Pinecone is our managed vector database of choice for production RAG systems requiring millisecond-latency semantic search at scale. We use it to store embedding vectors from client documents, product catalogs, and knowledge bases — powering AI search that understands meaning, not just keywords.

Semantic search RAG retrieval Managed embeddings High-scale retrieval

Qdrant

Vector DB

Qdrant is our self-hosted vector search engine for clients with data sovereignty requirements. Written in Rust for maximum performance, Qdrant handles filtered vector search with metadata — perfect for multi-tenant AI applications where you need to isolate each user's knowledge space.

Self-hosted vector search Filtered retrieval Multi-tenant RAG Data sovereignty

Weaviate

Vector DB

Weaviate brings a GraphQL interface and native multi-modal vector search — enabling AI systems to search across text, images, and structured data simultaneously. We use it for knowledge graph-style RAG pipelines and enterprise search applications combining semantic and keyword retrieval (hybrid search).

Hybrid search GraphQL API Multi-modal vectors Knowledge graphs

Supabase

Infrastructure

Supabase is the open-source Firebase alternative we use as the backend for AI SaaS products — combining Postgres, real-time subscriptions, Auth, Storage, and Edge Functions in one platform. We rely on Supabase's pgvector extension to run vector search inside Postgres when a dedicated vector DB isn't required.

AI SaaS backend pgvector embeddings Real-time data Auth + Storage

PostgreSQL

Infrastructure

Postgres is the relational backbone of every production AI application we build. It stores structured application data, audit logs, user records, and — via the pgvector extension — serves as a lightweight vector store. Its JSONB support makes it ideal for storing unstructured LLM outputs alongside structured metadata.

Application data pgvector extension JSONB LLM output Audit & logging

Redis

Infrastructure

Redis is the memory and caching layer for our AI applications — storing conversation history for LLM context windows, caching expensive LLM responses to cut API costs, rate-limiting AI endpoints, and managing real-time queues for async AI job processing. Essential for production-grade AI at scale.

Conversation memory LLM response cache Rate limiting Async AI queues
What We Build

Real-World AI Systems We Deliver

The stack isn't theoretical — here's what we build with it for clients across industries.

01

RAG Knowledge Assistants

Upload your company docs, manuals, or product catalog. Our RAG pipelines (LangChain + Pinecone/Qdrant + Claude/GPT-4) let employees or customers ask questions in plain English and get accurate, cited answers — grounded in your data, not hallucinations.

Claude / GPT-4 LangChain Pinecone Supabase
02

Multi-Agent Automation Systems

Complex workflows where multiple specialized AI agents collaborate — a Research Agent gathers data, an Analysis Agent processes it, a Writer Agent drafts the output — orchestrated via LangGraph or CrewAI with n8n handling the external integrations.

LangGraph CrewAI n8n Redis
03

AI-Powered Customer Support

End-to-end AI support systems that understand customer intent, retrieve relevant knowledge, escalate to humans when needed, and log every interaction — built on Claude/GPT-4 for reasoning, Weaviate for knowledge, and Supabase for CRM storage.

Claude Weaviate Supabase Make.com
04

AI SaaS Product Backends

Full-stack AI SaaS products with streaming chat UIs, user authentication, usage metering, and multi-model routing — powered by Vercel AI SDK on the frontend, Supabase + Postgres for data, Redis for caching, and Claude or GPT-4 for intelligence.

Vercel AI SDK Supabase Postgres Redis
05

Business Process Automation

Replace manual, repetitive workflows with AI-augmented pipelines — lead scoring, invoice processing, contract review, email triage — using n8n or Make.com to connect your existing tools to LLM-powered decision layers.

n8n / Make.com GPT-4 Postgres CRM APIs
06

Semantic Enterprise Search

Replace keyword search with AI-powered semantic search across internal wikis, HR policies, technical documentation, and email archives. Hybrid vector + keyword search via Weaviate or Qdrant, with Gemini's 1M context for processing giant document sets.

Gemini Weaviate / Qdrant LangChain Postgres
Our Philosophy

Why We Built This Stack

We didn't pick these tools from a list. We earned them in production — project by project, failure by failure.

🔬

Production-Tested, Not Hype-Driven

Every tool in our stack has been stress-tested on real client projects. We've tried and rejected tools that looked good in demos but broke under real data volumes, latency requirements, or cost constraints.

🔀

Model-Agnostic by Design

We don't bet everything on one AI provider. By building with LangChain, LangGraph, and the Vercel AI SDK, we can swap Claude for GPT-4 for Gemini based on the task — giving clients cost, performance, and compliance flexibility.

🏗️

Built for Scale from Day One

Redis caching, async queues, managed vector DBs, and Postgres as the relational source of truth — our stack is designed so that the AI features that work for your first 100 users still work for your first 100,000.

Ready to Build?

Let's Design Your AI Stack Together

Not sure which tools are right for your use case? Book a free 20-minute consultation. We'll map out the architecture, recommend the right models and databases, and give you an honest assessment of what it takes to build — and what it costs.

Claude· OpenAI· LangChain· n8n· Pinecone· Supabase

Trusted Worldwide — Long-Term Partnerships Built on Trust and Results

Take it from leading businesses around the world. Time and time again, our clients experience the quality, speed, and reliability of our AI solutions and automation services, leading to long-term partnerships with AXCEL.

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