a16z-infra/companion-app

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

5977 stars · 949 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

A tutorial starter stack for building and hosting AI companions with personality, backstory, and conversational memory. It combines Next.js, LangChain.js, a vector database (Pinecone/pgvector), and LLMs from OpenAI or Replicate into a deployable chat application.

Use cases

• build an ai companion chatbot with memory
• create an ai girlfriend or boyfriend chat app
• learn how to build chatbots with langchain and nextjs
• host a custom ai character with a backstory
• chat with an ai companion via sms
• starter template for llm chatbot apps with vector search

When to choose

• you want a learning-oriented starter stack showing how companion chatbots are assembled
• you need conversational memory plus vector-based retrieval in one template
• you want to deploy a chatbot quickly to Fly.io with auth and SMS support included

When to avoid

• you need a production-grade, maintained chatbot platform rather than a tutorial
• you want a framework or library to embed in an existing app instead of a full-stack template
• you require active development and recent updates

Facets

framework · maturity maintenance

chatbot rag llm-inference vector-database web-framework agent-framework artificial-intelligence large-language-models chatbots web-development developer-tools self-hosted ai-companions starter-template langchain nextjs conversational-memory tutorial-stack sms-chat retrieval-augmented-generation nodejs typescript web-server docker

Member repositories

For agents

markdown · JSON · MCP: product_card(name="a16z-infra/companion-app")