Best Free Retrieval-Augmented Generation (RAG) Software
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Compare the Top Free Retrieval-Augmented Generation (RAG) Software as of November 2025
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What is Free Retrieval-Augmented Generation (RAG) Software?
Retrieval-Augmented Generation (RAG) tools are advanced AI systems that combine information retrieval with text generation to produce more accurate and contextually relevant outputs. These tools first retrieve relevant data from a vast corpus or database, and then use that information to generate responses or content, enhancing the accuracy and detail of the generated text. RAG tools are particularly useful in applications requiring up-to-date information or specialized knowledge, such as customer support, content creation, and research. By leveraging both retrieval and generation capabilities, RAG tools improve the quality of responses in tasks like question-answering and summarization. This approach bridges the gap between static knowledge bases and dynamic content generation, providing more reliable and context-aware results. Compare and read user reviews of the best Free Retrieval-Augmented Generation (RAG) software currently available using the table below. This list is updated regularly.
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1
Vertex AI
Google
Vertex AI Search is a powerful, scalable enterprise search solution from Google Cloud, designed to deliver Google-quality search experiences across websites, intranets, and custom applications. The platform leverages advanced crawling, document understanding, and generative AI capabilities to provide highly relevant search results. It integrates seamlessly with existing business systems and supports features like real-time updates, vector search, and RAG (Retrieval Augmented Generation) for enhancing generative AI applications. Vertex AI Search is tailored for industries such as retail, healthcare, and media, offering specialized solutions that improve both search performance and customer engagement.Starting Price: Free ($300 in free credits) -
2
LM-Kit.NET
LM-Kit
LM-Kit RAG adds context-aware search and answers to C# and VB.NET with one NuGet install and an instant free trial that needs no signup. Hybrid keyword plus vector retrieval runs on local CPU or GPU, feeds only the best chunks to the language model, slashes hallucinations, and keeps every byte inside your stack for privacy and compliance. RagEngine orchestrates modular helpers: DataSource unifies documents and web pages, TextChunking splits files into overlap-aware pieces, and Embedder converts each piece into vectors for lightning-fast similarity search. Workflows run sync or async, scale to millions of passages, and refresh indexes in real time. Use RAG to power knowledge chatbots, enterprise search, legal discovery, and research assistants. Tune chunk sizes, metadata tags, and embedding models to balance recall and latency, while on-device inference delivers predictable cost and zero data leakage.Starting Price: Free (Community) or $1000/year -
3
IntelliWP
Devscope
IntelliWP is an advanced AI WordPress plugin for create chatbots that transforms your site into a self-updating, intelligent knowledge agent. It uses a combination of Retrieval-Augmented Generation (RAG) and fine-tuning technologies to deliver precise, real-time answers based on your website’s unique content. Unlike basic chatbots, IntelliWP adapts to your business context and provides expert-level support to visitors without human intervention. The plugin offers easy integration and multilingual capabilities, making it suitable for any WordPress site. IntelliWP also provides an intuitive dashboard to monitor system status and performance. With optional professional services for custom training and branding, it helps businesses enhance visitor engagement and deliver personalized experiences.Starting Price: 0 -
4
Mistral AI
Mistral AI
Mistral AI is a pioneering artificial intelligence startup specializing in open-source generative AI. The company offers a range of customizable, enterprise-grade AI solutions deployable across various platforms, including on-premises, cloud, edge, and devices. Flagship products include "Le Chat," a multilingual AI assistant designed to enhance productivity in both personal and professional contexts, and "La Plateforme," a developer platform that enables the creation and deployment of AI-powered applications. Committed to transparency and innovation, Mistral AI positions itself as a leading independent AI lab, contributing significantly to open-source AI and policy development.Starting Price: Free -
5
Cohere
Cohere AI
Cohere is an enterprise AI platform that enables developers and businesses to build powerful language-based applications. Specializing in large language models (LLMs), Cohere provides solutions for text generation, summarization, and semantic search. Their model offerings include the Command family for high-performance language tasks and Aya Expanse for multilingual applications across 23 languages. Focused on security and customization, Cohere allows flexible deployment across major cloud providers, private cloud environments, or on-premises setups to meet diverse enterprise needs. The company collaborates with industry leaders like Oracle and Salesforce to integrate generative AI into business applications, improving automation and customer engagement. Additionally, Cohere For AI, their research lab, advances machine learning through open-source projects and a global research community.Starting Price: Free -
6
Airbyte
Airbyte
Airbyte is an open-source data integration platform designed to help businesses synchronize data from various sources to their data warehouses, lakes, or databases. The platform provides over 550 pre-built connectors and enables users to easily create custom connectors using low-code or no-code tools. Airbyte's solution is optimized for large-scale data movement, enhancing AI workflows by seamlessly integrating unstructured data into vector databases like Pinecone and Weaviate. It offers flexible deployment options, ensuring security, compliance, and governance across all models.Starting Price: $2.50 per credit -
7
Graphlit
Graphlit
Whether you're building an AI copilot, or chatbot, or enhancing your existing application with LLMs, Graphlit makes it simple. Built on a serverless, cloud-native platform, Graphlit automates complex data workflows, including data ingestion, knowledge extraction, LLM conversations, semantic search, alerting, and webhook integrations. Using Graphlit's workflow-as-code approach, you can programmatically define each step in the content workflow. From data ingestion through metadata indexing and data preparation; from data sanitization through entity extraction and data enrichment. And finally through integration with your applications with event-based webhooks and API integrations.Starting Price: $49 per month -
8
HyperCrawl
HyperCrawl
HyperCrawl is the first web crawler designed specifically for LLM and RAG applications and develops powerful retrieval engines. Our focus was to boost the retrieval process by eliminating the crawl time of domains. We introduced multiple advanced methods to create a novel approach to building an ML-first web crawler. Instead of waiting for each webpage to load one by one (like standing in line at the grocery store), it asks for multiple web pages at the same time (like placing multiple online orders simultaneously). This way, it doesn’t waste time waiting and can move on to other tasks. By setting a high concurrency, the crawler can handle multiple tasks simultaneously. This speeds up the process compared to handling only a few tasks at a time. HyperLLM reduces the time and resources needed to open new connections by reusing existing ones. Think of it like reusing a shopping bag instead of getting a new one every time.Starting Price: Free -
9
Ragie
Ragie
Ragie streamlines data ingestion, chunking, and multimodal indexing of structured and unstructured data. Connect directly to your own data sources, ensuring your data pipeline is always up-to-date. Built-in advanced features like LLM re-ranking, summary index, entity extraction, flexible filtering, and hybrid semantic and keyword search help you deliver state-of-the-art generative AI. Connect directly to popular data sources like Google Drive, Notion, Confluence, and more. Automatic syncing keeps your data up-to-date, ensuring your application delivers accurate and reliable information. With Ragie connectors, getting your data into your AI application has never been simpler. With just a few clicks, you can access your data where it already lives. Automatic syncing keeps your data up-to-date ensuring your application delivers accurate and reliable information. The first step in a RAG pipeline is to ingest the relevant data. Use Ragie’s simple APIs to upload files directly.Starting Price: $500 per month -
10
Inquir
Inquir
Inquir is an AI-powered platform that enables users to create personalized search engines tailored to their specific data needs. It offers capabilities such as integrating diverse data sources, building Retrieval-Augmented Generation (RAG) systems, and implementing context-aware search functionalities. Inquir's features include scalability, security with separate infrastructure for each organization, and a developer-friendly API. It also provides a faceted search for efficient data discovery and an analytics API to enhance the search experience. Flexible pricing plans are available, ranging from a free demo access tier to enterprise solutions, accommodating various business sizes and requirements. Transform product discovery with Inquir. Improve conversion rates and customer retention by providing fast and robust search experiences.Starting Price: $60 per month -
11
RAGFlow
RAGFlow
RAGFlow is an open source Retrieval-Augmented Generation (RAG) engine that enhances information retrieval by combining Large Language Models (LLMs) with deep document understanding. It offers a streamlined RAG workflow suitable for businesses of any scale, providing truthful question-answering capabilities backed by well-founded citations from various complex formatted data. Key features include template-based chunking, compatibility with heterogeneous data sources, and automated RAG orchestration.Starting Price: Free -
12
FastGPT
FastGPT
FastGPT is a free, open source AI knowledge base platform that offers out-of-the-box data processing, model invocation, retrieval-augmented generation retrieval, and visual AI workflows, enabling users to easily build complex large language model applications. It allows the creation of domain-specific AI assistants by training models with imported documents or Q&A pairs, supporting various formats such as Word, PDF, Excel, Markdown, and web links. The platform automates data preprocessing tasks, including text preprocessing, vectorization, and QA segmentation, enhancing efficiency. FastGPT supports AI workflow orchestration through a visual drag-and-drop interface, facilitating the design of complex workflows that integrate tasks like database queries and inventory checks. It also offers seamless API integration with existing GPT applications and platforms like Discord, Slack, and Telegram using OpenAI-aligned APIs.Starting Price: $0.37 per month -
13
Supavec
Supavec
Supavec is an open source Retrieval-Augmented Generation (RAG) platform designed to help developers build powerful AI applications that integrate seamlessly with any data source, regardless of scale. As an alternative to Carbon.ai, Supavec offers full control over your AI infrastructure, allowing you to choose between a cloud version or self-hosting on your own systems. Built with technologies like Supabase, Next.js, and TypeScript, Supavec ensures scalability, enabling the handling of millions of documents with support for concurrent processing and horizontal scaling. The platform emphasizes enterprise-grade privacy by utilizing Supabase Row Level Security (RLS), ensuring that your data remains private and secure with granular access control. Developers benefit from a simple API, comprehensive documentation, and easy integration, facilitating quick setup and deployment of AI applications.Starting Price: Free -
14
scalerX.ai
scalerX.ai
Launch & train your own personalized AI-RAG agents on Telegram. With scalerX you can create personalized RAG AI-powered agents trained with your knowledge base in minutes, no code required. These AI agents are integrated directly into Telegram, including groups and channels. Awesome for education, sales, customer service, entertainment, automating community moderation and engagement. Agents can behave as chatbots in solo, groups and channels, support text-to-text, text-to-image, voice. You can set agent usage quotas and permissions using ACLs so only authorized users can access your agents. Training your agents is easy: create your agent and upload files to your bots knowledge base, auto-sync from Dropbox, Google Drive or scrape web pages.Starting Price: $5/month -
15
BGE
BGE
BGE (BAAI General Embedding) is a comprehensive retrieval toolkit designed for search and Retrieval-Augmented Generation (RAG) applications. It offers inference, evaluation, and fine-tuning capabilities for embedding models and rerankers, facilitating the development of advanced information retrieval systems. The toolkit includes components such as embedders and rerankers, which can be integrated into RAG pipelines to enhance search relevance and accuracy. BGE supports various retrieval methods, including dense retrieval, multi-vector retrieval, and sparse retrieval, providing flexibility to handle different data types and retrieval scenarios. The models are available through platforms like Hugging Face, and the toolkit provides tutorials and APIs to assist users in implementing and customizing their retrieval systems. By leveraging BGE, developers can build robust and efficient search solutions tailored to their specific needs.Starting Price: Free -
16
Pathway
Pathway
Pathway is a Python ETL framework for stream processing, real-time analytics, LLM pipelines, and RAG. Pathway comes with an easy-to-use Python API, allowing you to seamlessly integrate your favorite Python ML libraries. Pathway code is versatile and robust: you can use it in both development and production environments, handling both batch and streaming data effectively. The same code can be used for local development, CI/CD tests, running batch jobs, handling stream replays, and processing data streams. Pathway is powered by a scalable Rust engine based on Differential Dataflow and performs incremental computation. Your Pathway code, despite being written in Python, is run by the Rust engine, enabling multithreading, multiprocessing, and distributed computations. All the pipeline is kept in memory and can be easily deployed with Docker and Kubernetes. -
17
Kitten Stack
Kitten Stack
Kitten Stack is an all-in-one unified platform for building, optimizing, and deploying LLM applications. It eliminates common infrastructure challenges by providing robust tools and managed infrastructure, enabling developers to go from idea to production-grade AI applications faster and easier than ever before. Kitten Stack streamlines LLM application development by combining managed RAG infrastructure, unified model access, and comprehensive analytics into a single platform, allowing developers to focus on creating exceptional user experiences rather than wrestling with backend infrastructure. Core Capabilities: Instant RAG Engine: Securely connect private documents (PDF, DOCX, TXT) and live web data in minutes. Kitten Stack handles the complexity of data ingestion, parsing, chunking, embedding, and retrieval. Unified Model Gateway: Access 100+ AI models (OpenAI, Anthropic, Google, etc.) through a single platform.Starting Price: $50/month -
18
Databricks Data Intelligence Platform
Databricks
The Databricks Data Intelligence Platform allows your entire organization to use data and AI. It’s built on a lakehouse to provide an open, unified foundation for all data and governance, and is powered by a Data Intelligence Engine that understands the uniqueness of your data. The winners in every industry will be data and AI companies. From ETL to data warehousing to generative AI, Databricks helps you simplify and accelerate your data and AI goals. Databricks combines generative AI with the unification benefits of a lakehouse to power a Data Intelligence Engine that understands the unique semantics of your data. This allows the Databricks Platform to automatically optimize performance and manage infrastructure in ways unique to your business. The Data Intelligence Engine understands your organization’s language, so search and discovery of new data is as easy as asking a question like you would to a coworker. -
19
Credal
Credal
Credal is the safest way to leverage AI at your enterprise. Our APIs, chat UI, and Slackbot automatically mask, redact or warn users about sensitive data, based on policies set by IT. Users get the most powerful AI apps like GPT-4-32k (the private and most powerful version of ChatGPT-4), Claude and others, whilst the Enterprise can control usage with confidence that data is secured and Audit Logged. Credal integrates with enterprise data sources like Google Drive, Confluence, and Slack so employees can seamlessly use AI with their existing knowledge assets whilst respecting source system permissions and masking sensitive data.Starting Price: $500 per month
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