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txtai

All-in-One AI Framework for Semantic Search and LLM Workflows

What is txtai?

txtai is an open-source all-in-one AI framework for semantic search, LLM orchestration, and language model workflows. Created by NeuML and led by David Mezzetti, txtai combines vector indexes, graph networks, and relational databases into a unified embeddings database system.

πŸ’‘ Key Innovation: txtai is designed as a developer-friendly framework that simplifies building AI applications by integrating semantic search, RAG, agents, and workflows in a single package.

txtai has gained significant traction with over 12,000+ GitHub stars and is recognized as one of the simplest ways to implement embeddings and vector search in production systems.

RAG

Retrieval Augmented

Agents

Autonomous Systems

Vectors

Semantic Search

Workflows

Multi-Model

Core Architecture

txtai's foundation is an embeddings database that unifies multiple data structures:

txtai Core Embeddings Database Vector Indexes Dense & Sparse Graph Networks Knowledge Graphs Relational DB SQL Support RAG Pipelines AI Agents Workflows

Vector Indexes

Dense and sparse vector representations

Supports sentence-transformers, OpenAI embeddings

Graph Networks

Knowledge graph construction

Relationship mapping and traversal

Relational DB

SQL query support

Structured data integration

Key Features

πŸ”Ž Semantic Search

Advanced vector search with SQL, object storage, topic modeling, and multimodal indexing capabilities.

πŸ€– AI Agents

Autonomous agents that automatically create workflows to answer complex multi-faceted requests.

πŸ”„ RAG Pipelines

Retrieval Augmented Generation with built-in citation support and context management.

⚑ Workflows

Multi-model workflows that orchestrate multiple AI models and data processing steps.

πŸ“Š SQL Integration

Natural language to SQL translation with vector search capabilities combined.

🌐 Multimodal

Support for text, images, audio, and video in unified search and processing.

RAG with txtai

txtai makes building Retrieval Augmented Generation systems straightforward with built-in support for citations, context management, and multiple embedding providers.

RAG Pipeline Example

from txtai import Embeddings
from txtai.pipeline import RAG

# Create embeddings database
embeddings = Embeddings(path="sentence-transformers/all-MiniLM-L6-v2")

# Create RAG pipeline
rag = RAG(
    embeddings,
    "microsoft/DialoGPT-medium",  # LLM for generation
    citation=True  # Enable citation support
)

# Add documents
documents = [
    "Python is a high-level programming language...",
    "Machine learning is a subset of AI...",
    "Vector databases store embeddings..."
]
embeddings.index(documents)

# Run RAG query
result = rag("What is Python?")
print(result)
                

txtai RAG pipelines automatically handle context retrieval, LLM prompting, and response generation.

βœ… Benefits

  • β€’ Built-in citation tracking
  • β€’ Multiple embedding providers
  • β€’ Context limit management
  • β€’ Automatic relevance scoring

🎯 Use Cases

  • β€’ Document Q&A systems
  • β€’ Customer support chatbots
  • β€’ Research assistants
  • β€’ Knowledge base search

AI Agents

txtai agents automatically create workflows to answer multi-faceted user requests. Agents iteratively prompt and interface with tools to step through complex problems.

Agent Example

from datetime import datetime
from txtai import Agent

# Define tools
def today() -> str:
    """Gets current date and time"""
    return datetime.today().isoformat()

wikipedia = {
    "name": "wikipedia",
    "description": "Searches a Wikipedia database",
    "provider": "huggingface-hub",
    "container": "neuml/txtai-wikipedia"
}

# Create agent
agent = Agent(
    model="Qwen/Qwen3-4B-Instruct-2507",
    tools=[today, wikipedia, "websearch"],
    max_steps=10
)

# Use agent
result = agent("Which city has highest population, Boston or New York?")
                

Agents excel at complex tasks requiring multiple tools and reasoning steps.

Multi-Model Workflows

txtai workflows enable orchestration of multiple AI models and data processing steps in a unified pipeline. Perfect for complex multi-step AI applications.

πŸ”—

Chaining

βš™οΈ

Transform

πŸ”€

Branch

🎯

Condition

Workflow Operations

Core Operations
  • β€’ Chain: Sequential execution of models
  • β€’ Merge: Combine multiple outputs
  • β€’ Parallel: Run models concurrently
  • β€’ Loop: Iterative processing
Advanced Features
  • β€’ Branch: Conditional routing
  • β€’ Transform: Data preprocessing
  • β€’ Extract: Information extraction
  • β€’ Prompt: Dynamic template generation

Installation & Setup

Quick Start

# Install txtai
pip install txtai

# Install with all dependencies
pip install txtai[pipeline]

# Basic usage
from txtai import Embeddings

# Create embeddings
embeddings = Embeddings()

# Index documents
documents = [
    "US tops 5 million confirmed virus cases",
    "Canada's last fully intact ice shelf has collapsed",
    "Beijing mobilises invasion craft along coast"
]

embeddings.index(documents)

# Search
results = embeddings.search("climate change", limit=2)
print(results)
                

Package Options

  • β€’ txtai: Base package
  • β€’ txtai[pipeline]: With all pipelines
  • β€’ txtai[all]: All optional dependencies
  • β€’ txtai[database]: Database support

Supported Models

  • β€’ Sentence Transformers: Open source embeddings
  • β€’ OpenAI: GPT embeddings
  • β€’ Cohere: Production embeddings
  • β€’ Hugging Face: Community models

txtai vs Alternatives

Feature txtai LangChain LlamaIndex
Simplicity ⭐⭐⭐⭐⭐ ⭐⭐ ⭐⭐⭐
Built-in Vector DB βœ… Yes ❌ No ❌ No
RAG Support βœ… Built-in βœ… Yes βœ… Yes
SQL Integration βœ… Native ❌ Limited ❌ Limited
Agent Support βœ… Advanced βœ… Yes ⚠️ Basic
Learning Curve Low High Medium

Real-World Use Cases

πŸ“š

Document Search

πŸ’¬

Customer Support

πŸ”¬

Research Assistant

πŸ“°

Content Analysis

πŸ€–

Chatbots

πŸ“Š

Knowledge Base

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