List of the Top 25 Free Retrieval-Augmented Generation (RAG) Software in 2025

Vertex AI Search is an advanced and scalable search solution developed by Google Cloud, aimed at providing top-notch search experiences for enterprises across their websites, internal networks, and bespoke applications. This platform utilizes cutting-edge technologies in crawling, document comprehension, and generative AI to ensure exceptionally relevant search outcomes. It integrates effortlessly with current business infrastructures and offers a range of features, including real-time updates, vector-based search, and Retrieval Augmented Generation (RAG) to enhance generative AI functionalities. Vertex AI Search is specifically designed for various sectors such as retail, healthcare, and media, delivering customized solutions that enhance search efficacy and boost customer interaction.

LM-Kit RAG introduces enhanced context-aware search and response capabilities for C# and VB.NET applications, all through a single NuGet installation and an immediate free trial that requires no registration. This hybrid search method combines keyword and vector retrieval, which operates on your local CPU or GPU. It efficiently selects only the most relevant data segments for the language model, reducing the chance of inaccuracies and ensuring that all data remains secure within your infrastructure for privacy and regulatory adherence. The RagEngine manages a variety of modular components: the DataSource integrates documents and web pages, the TextChunking feature divides files into segments that are aware of overlaps, and the Embedder transforms these segments into vectors that allow for rapid similarity searches. Workflows can operate synchronously or asynchronously, accommodating millions of entries and updating indexes in real-time. Leverage RAG for applications such as intelligent chatbots, corporate search functions, legal discovery processes, and research assistants. Customize chunk sizes, metadata tags, and embedding models to find the right balance between recall and latency, while on-device inference ensures predictable expenses and maintains data integrity.

IntelliWP is a cutting-edge AI plugin for WordPress that empowers websites by transforming their existing content into a dynamic, intelligent knowledge agent capable of delivering precise, real-time, and context-aware responses to visitors without human involvement. Leveraging advanced Retrieval-Augmented Generation (RAG) combined with fine-tuning technologies, IntelliWP trains your AI assistant on your entire WordPress content ecosystem, enabling deep semantic understanding and expert-level answers that reflect your unique business domain. This powerful architecture supports multilingual capabilities and offers an easy-to-use integration process that requires minimal technical expertise. The plugin features a customizable chat interface with branded design options, tailored UI/UX, and advanced positioning to seamlessly fit your website’s look and feel. Businesses can track system health, usage analytics, and training status via a comprehensive dashboard. IntelliWP also includes a rich training workflow, allowing content selection, review, and performance optimization to ensure the AI evolves alongside your business needs. Additional professional services are available to accelerate setup and fine-tune the AI agent for maximum impact. Beyond WordPress, IntelliWP’s AI agent can be deployed universally on other websites and mobile platforms, providing a consistent conversational experience across channels. This platform significantly enhances customer engagement by automating personalized support and converting visitors into loyal users. Ultimately, IntelliWP redefines how WordPress sites interact with their audiences, combining AI precision with effortless scalability.

Mistral AI is recognized as a pioneering startup in the field of artificial intelligence, with a particular emphasis on open-source generative technologies. The company offers a wide range of customizable, enterprise-grade AI solutions that can be deployed across multiple environments, including on-premises, cloud, edge, and individual devices. Notable among their offerings are "Le Chat," a multilingual AI assistant designed to enhance productivity in both personal and business contexts, and "La Plateforme," a resource for developers that streamlines the creation and implementation of AI-powered applications. Mistral AI's unwavering dedication to transparency and innovative practices has enabled it to carve out a significant niche as an independent AI laboratory, where it plays an active role in the evolution of open-source AI while also influencing relevant policy conversations. By championing the development of an open AI ecosystem, Mistral AI not only contributes to technological advancements but also positions itself as a leading voice within the industry, shaping the future of artificial intelligence. This commitment to fostering collaboration and openness within the AI community further solidifies its reputation as a forward-thinking organization.

Cohere is a powerful enterprise AI platform that enables developers and organizations to build sophisticated applications using language technologies. By prioritizing large language models (LLMs), Cohere delivers cutting-edge solutions for a variety of tasks, including text generation, summarization, and advanced semantic search functions. The platform includes the highly efficient Command family, designed to excel in language-related tasks, as well as Aya Expanse, which provides multilingual support for 23 different languages. With a strong emphasis on security and flexibility, Cohere allows for deployment across major cloud providers, private cloud systems, or on-premises setups to meet diverse enterprise needs. The company collaborates with significant industry leaders such as Oracle and Salesforce, aiming to integrate generative AI into business applications, thereby improving automation and enhancing customer interactions. Additionally, Cohere For AI, the company’s dedicated research lab, focuses on advancing machine learning through open-source projects and nurturing a collaborative global research environment. This ongoing commitment to innovation not only enhances their technological capabilities but also plays a vital role in shaping the future of the AI landscape, ultimately benefiting various sectors and industries.

Lettria introduces an advanced AI solution known as GraphRAG, designed to enhance the accuracy and reliability of generative AI applications. By merging the benefits of knowledge graphs with vector-based AI technologies, Lettria empowers organizations to extract precise information from complex and unstructured data. This platform simplifies various tasks, including document parsing, data model refinement, and text classification, proving to be especially advantageous for industries such as healthcare, finance, and legal. In addition, Lettria’s AI solutions significantly reduce the likelihood of inaccuracies in AI-generated responses, promoting transparency and trust in the outcomes delivered by AI systems. The innovative structure of GraphRAG also enables organizations to make better use of their data, facilitating informed decision-making and strategic insights, ultimately leading to improved operational efficiency and enhanced business outcomes.

Prophecy enhances accessibility for a broader audience, including visual ETL developers and data analysts, by providing a straightforward point-and-click interface that allows for the easy creation of pipelines alongside some SQL expressions. By using the Low-Code designer to build workflows, you also produce high-quality, easily interpretable code for both Spark and Airflow, which is then automatically integrated into your Git repository. The platform features a gem builder that facilitates the rapid development and implementation of custom frameworks, such as those addressing data quality, encryption, and new sources and targets that augment its current functionalities. Additionally, Prophecy ensures that best practices and critical infrastructure are delivered as managed services, which streamlines your daily tasks and enhances your overall user experience. With Prophecy, you can craft high-performance workflows that harness the cloud’s scalability and performance, guaranteeing that your projects operate smoothly and effectively. This exceptional blend of features positions Prophecy as an indispensable asset for contemporary data workflows, making it essential for teams aiming to optimize their data management processes. The capacity to build tailored solutions with ease further solidifies its role as a transformative tool in the data landscape.

Airbyte is an innovative data integration platform that employs an open-source model, aimed at helping businesses consolidate data from various sources into their data lakes, warehouses, or databases. Boasting an extensive selection of more than 550 pre-built connectors, it empowers users to create custom connectors with ease using low-code or no-code approaches. The platform is meticulously designed for the efficient transfer of large data volumes, consequently enhancing artificial intelligence workflows by seamlessly integrating unstructured data into vector databases like Pinecone and Weaviate. In addition, Airbyte offers flexible deployment options that ensure security, compliance, and governance across different data models, establishing it as a valuable resource for contemporary data integration challenges. This feature is particularly significant for organizations aiming to bolster their data-driven decision-making capabilities, ultimately leading to more informed strategies and improved outcomes. By streamlining the data integration process, Airbyte enables businesses to focus on extracting actionable insights from their data.

Whether you're creating an AI assistant, a chatbot, or enhancing your existing application with large language models, Graphlit makes the process easier and more efficient. It utilizes a serverless, cloud-native design that optimizes complex data workflows, covering aspects such as data ingestion, knowledge extraction, interactions with LLMs, semantic searches, alert notifications, and webhook integrations. By adopting Graphlit's workflow-as-code approach, you can methodically define each step of the content workflow. This encompasses everything from data ingestion and metadata indexing to data preparation, data sanitization, entity extraction, and data enrichment. Ultimately, it promotes smooth integration with your applications through event-driven webhooks and API connections, streamlining the entire operation for user convenience. This adaptability guarantees that developers can customize workflows to fit their unique requirements, eliminating unnecessary complications and enhancing overall productivity. Additionally, the comprehensive features offered by Graphlit empower teams to innovate without being bogged down by technical barriers.

Swirl seamlessly integrates with enterprise applications, providing real-time access to data. It allows for secure retrieval-augmented generation from corporate information without the need to store any data, all while operating effectively within your firewall. Furthermore, Swirl can connect effortlessly to your proprietary language models. With the introduction of Swirl Search, your organization benefits from an innovative solution that facilitates quick access to vital information from various data sources. The platform is equipped with multiple connectors tailored for popular applications and services, ensuring a smooth connection. Data migration is unnecessary since Swirl works harmoniously with your existing systems, prioritizing data security and maintaining privacy protocols. Designed specifically for enterprises, Swirl understands that moving data solely for search and AI integration can incur high costs and be inefficient. By providing a federated and unified search experience, Swirl offers a superior alternative for businesses seeking to maximize their data effectiveness. This strategy not only boosts productivity but also simplifies the search process across a variety of data settings, making it an essential tool for modern enterprises. Ultimately, Swirl empowers organizations to leverage their data more efficiently and effectively.

HyperCrawl represents a groundbreaking web crawler specifically designed for applications involving LLM and RAG, aimed at developing highly efficient retrieval engines. The main objective was to optimize the retrieval process by reducing the time required to crawl diverse domains. We introduced a variety of advanced methodologies to create a novel machine learning-oriented strategy for web crawling. Instead of sequentially loading web pages—comparable to waiting in line at a supermarket—the crawler requests multiple pages at once, similar to making several online purchases simultaneously. This approach effectively eliminates downtime, allowing the crawler to tackle other tasks concurrently. By maximizing concurrent operations, the crawler adeptly handles a multitude of tasks simultaneously, greatly speeding up the retrieval process in contrast to managing only a few tasks at a time. Additionally, HyperCrawl enhances connection efficiency and resource management by reusing existing connections, akin to choosing a reusable shopping bag instead of acquiring a new one with every transaction. This cutting-edge method not only refines the crawling procedure but also significantly boosts overall system performance, leading to faster and more reliable data retrieval. Furthermore, as technology continues to advance, HyperCrawl is poised to adapt and evolve, ensuring it remains at the forefront of web crawling innovation.

We are excited to unveil an open-source AI model that offers the ability to be fine-tuned, distilled, and deployed across a wide range of platforms. Our latest instruction-tuned model is available in three different sizes: 8B, 70B, and 405B, allowing you to select an option that best fits your unique needs. The open ecosystem we provide accelerates your development journey with a variety of customized product offerings tailored to meet your specific project requirements. You can choose between real-time inference and batch inference services, depending on what your project requires, giving you added flexibility to optimize performance. Furthermore, downloading model weights can significantly enhance cost efficiency per token while you fine-tune the model for your application. To further improve performance, you can leverage synthetic data and seamlessly deploy your solutions either on-premises or in the cloud. By taking advantage of Llama system components, you can also expand the model's capabilities through the use of zero-shot tools and retrieval-augmented generation (RAG), promoting more agentic behaviors in your applications. Utilizing the extensive 405B high-quality data enables you to fine-tune specialized models that cater specifically to various use cases, ensuring that your applications function at their best. In conclusion, this empowers developers to craft innovative solutions that not only meet efficiency standards but also drive effectiveness in their respective domains, leading to a significant impact on the technology landscape.

Deliver outstanding results through a sophisticated vector database tailored for advanced retrieval augmented generation (RAG) and modern search techniques. Focus on substantial expansion with an enterprise-class vector database that incorporates robust security protocols, adherence to compliance guidelines, and ethical AI practices. Elevate your applications by utilizing cutting-edge retrieval strategies backed by thorough research and demonstrated client success stories. Seamlessly initiate your generative AI application with easy integrations across multiple platforms and data sources, accommodating various AI models and frameworks. Enable the automatic import of data from a wide range of Azure services and third-party solutions. Refine the management of vector data with integrated workflows for extraction, chunking, enrichment, and vectorization, ensuring a fluid process. Provide support for multivector functionalities, hybrid methodologies, multilingual capabilities, and metadata filtering options. Move beyond simple vector searching by integrating keyword match scoring, reranking features, geospatial search capabilities, and autocomplete functions, thereby creating a more thorough search experience. This comprehensive system not only boosts retrieval effectiveness but also equips users with enhanced tools to extract deeper insights from their data, fostering a more informed decision-making process. Furthermore, the architecture encourages continual innovation, allowing organizations to stay ahead in an increasingly competitive landscape.

Ragie streamlines the tasks of data ingestion, chunking, and multimodal indexing for both structured and unstructured datasets. By creating direct links to your data sources, it ensures a continually refreshed data pipeline. Its sophisticated features, which include LLM re-ranking, summary indexing, entity extraction, and dynamic filtering, support the deployment of innovative generative AI solutions. Furthermore, it enables smooth integration with popular data sources like Google Drive, Notion, and Confluence, among others. The automatic synchronization capability guarantees that your data is always up to date, providing your application with reliable and accurate information. With Ragie’s connectors, incorporating your data into your AI application is remarkably simple, allowing for easy access from its original source with just a few clicks. The first step in a Retrieval-Augmented Generation (RAG) pipeline is to ingest the relevant data, which you can easily accomplish by uploading files directly through Ragie’s intuitive APIs. This method not only boosts efficiency but also empowers users to utilize their data more effectively, ultimately leading to better decision-making and insights. Moreover, the user-friendly interface ensures that even those with minimal technical expertise can navigate the system with ease.

Experience unparalleled privacy with AnyLLM, an innovative application that merges various language models, documents, and agents into one cohesive desktop platform. With Desktop AnyLLM, you retain complete control, as it only connects to the services you designate and can function entirely offline. You are not limited to a single LLM provider; you can leverage enterprise models like GPT-4, create a custom model, or select from open-source alternatives such as Llama and Mistral. Your business documents, including PDFs and Word files, can now be effortlessly integrated and utilized. AnyLLM comes equipped with user-friendly defaults for local LLM, embedding, and storage, ensuring strong privacy from the outset. Additionally, AnyLLM is freely available for desktop use or can be self-hosted via our GitHub repository. For businesses or teams seeking a streamlined experience, cloud hosting for AnyLLM begins at $50 per month, offering a managed instance that simplifies technical challenges. Whether you are a freelancer or part of a large organization, AnyLLM provides a flexible and secure environment to enhance your workflow. Empowering your productivity with AnyLLM has never been more straightforward or confidential.

Manages the entire lifecycle of creating, testing, launching, and maintaining LLM applications smoothly, thereby removing the requirement for multiple system integrations. This strategy guarantees an optimal total cost of ownership (TCO). It utilizes a vector database and search engine that outperforms all key competitors, featuring query latency that is ten times quicker, query throughput that is five times higher, and costs that are three times lower. This system exemplifies a state-of-the-art data and knowledge infrastructure capable of effectively managing vast amounts of both unstructured and structured multi-modal data. With this solution, you can ensure that obsolete information will never pose a problem. Integrating advanced, modular, agentic RAG and GraphRAG techniques becomes effortless, eliminating the need for intricate plumbing code. Through CI/CD-style evaluations, you can confidently adjust the configuration of your AI applications without worrying about potential regressions. This capability accelerates your iteration process, enabling production transitions in a matter of days instead of months. Furthermore, it includes precise access control based on roles and privileges, which helps maintain security throughout the development cycle. This all-encompassing framework not only boosts operational efficiency but also nurtures a more responsive and adaptable development environment, making it ideal for fast-paced projects. With this innovative approach, teams can focus more on creativity and problem-solving rather than on technical constraints.

The newest version of the open-source AI framework, which can be customized and utilized across different platforms, is available in several configurations: 1B, 3B, 11B, and 90B, while still offering the option to use Llama 3.1. Llama 3.2 includes a selection of large language models (LLMs) that are pretrained and fine-tuned specifically for multilingual text processing in 1B and 3B sizes, whereas the 11B and 90B models support both text and image inputs, generating text outputs. This latest release empowers users to build highly effective applications that cater to specific requirements. For applications running directly on devices, such as summarizing conversations or managing calendars, the 1B or 3B models are excellent selections. On the other hand, the 11B and 90B models are particularly suited for tasks involving images, allowing users to manipulate existing pictures or glean further insights from images in their surroundings. Ultimately, this broad spectrum of models opens the door for developers to experiment with creative applications across a wide array of fields, enhancing the potential for innovation and impact.

Vectorize is an advanced platform designed to transform unstructured data into optimized vector search indexes, thereby improving retrieval-augmented generation processes. Users have the ability to upload documents or link to external knowledge management systems, allowing the platform to extract natural language formatted for compatibility with large language models. By concurrently assessing different chunking and embedding techniques, Vectorize offers personalized recommendations while granting users the option to choose their preferred approaches. Once a vector configuration is selected, the platform seamlessly integrates it into a real-time pipeline that adjusts to any data changes, guaranteeing that search outcomes are accurate and pertinent. Vectorize also boasts integrations with a variety of knowledge repositories, collaboration tools, and customer relationship management systems, making it easier to integrate data into generative AI frameworks. Additionally, it supports the development and upkeep of vector indexes within designated vector databases, further boosting its value for users. This holistic methodology not only streamlines data utilization but also solidifies Vectorize's role as an essential asset for organizations aiming to maximize their data's potential for sophisticated AI applications. As such, it empowers businesses to enhance their decision-making processes and ultimately drive innovation.

Inquir is an innovative platform that utilizes artificial intelligence to enable users to create customized search engines tailored to their specific data needs. It offers a range of features, including the integration of multiple data sources, the development of Retrieval-Augmented Generation (RAG) systems, and context-aware search capabilities. Among its notable attributes are scalability, enhanced security with dedicated infrastructure for each client, and a developer-friendly API. Inquir also includes a faceted search option for efficient data navigation and an analytics API that enhances the overall search experience. With flexible pricing plans that range from a free demo to extensive enterprise solutions, Inquir caters to the varying demands of organizations, regardless of size. By employing Inquir, businesses can transform product discovery processes, leading to increased conversion rates and improved customer loyalty thanks to fast and effective search functionalities. As a result, Inquir equips users with powerful tools that significantly change their data interaction dynamics, making it a game-changer in the realm of search technology. Its commitment to continuous improvement and user satisfaction further solidifies its position as a leader in the industry.

The latest iteration in the Llama series, Llama 3.3, marks a notable leap forward in the realm of language models, designed to improve AI's abilities in both understanding and communication. It features enhanced contextual reasoning, more refined language generation, and state-of-the-art fine-tuning capabilities that yield remarkably accurate, human-like responses for a wide array of applications. This version benefits from a broader training dataset, advanced algorithms that allow for deeper comprehension, and reduced biases when compared to its predecessors. Llama 3.3 excels in various domains such as natural language understanding, creative writing, technical writing, and multilingual conversations, making it an invaluable tool for businesses, developers, and researchers. Furthermore, its modular design lends itself to adaptable deployment across specific sectors, ensuring consistent performance and flexibility even in expansive applications. With these significant improvements, Llama 3.3 is set to transform the benchmarks for AI language models and inspire further innovations in the field. It is an exciting time for AI development as this new version opens doors to novel possibilities in human-computer interaction.

RAGFlow is an accessible Retrieval-Augmented Generation (RAG) system that enhances information retrieval by merging Large Language Models (LLMs) with sophisticated document understanding capabilities. This groundbreaking tool offers a unified RAG workflow suitable for organizations of various sizes, providing precise question-answering services that are backed by trustworthy citations from a wide array of meticulously formatted data. Among its prominent features are template-driven chunking, compatibility with multiple data sources, and the automation of RAG orchestration, positioning it as a flexible solution for improving data-driven insights. Furthermore, RAGFlow is designed with user-friendliness in mind, ensuring that individuals can smoothly and efficiently obtain pertinent information. Its intuitive interface and robust functionalities make it an essential resource for organizations looking to leverage their data more effectively.

FastGPT serves as an adaptable, open-source AI knowledge base platform designed to simplify data processing, model invocation, and retrieval-augmented generation, alongside visual AI workflows, enabling users to develop advanced applications of large language models effortlessly. The platform allows for the creation of tailored AI assistants by training models with imported documents or Q&A sets, supporting a wide array of formats including Word, PDF, Excel, Markdown, and web links. Moreover, it automates crucial data preprocessing tasks like text refinement, vectorization, and QA segmentation, which markedly enhances overall productivity. FastGPT also boasts a visually intuitive drag-and-drop interface that facilitates AI workflow orchestration, enabling users to easily build complex workflows that may involve actions such as database queries and inventory checks. In addition, it offers seamless API integration, allowing users to link their current GPT applications with widely-used platforms like Discord, Slack, and Telegram, utilizing OpenAI-compliant APIs. This holistic approach not only improves user experience but also expands the potential uses of AI technology across various industries. Ultimately, FastGPT empowers users to innovate and implement AI solutions that can address a multitude of challenges.

Supavec represents a cutting-edge open-source Retrieval-Augmented Generation (RAG) platform that enables developers to build sophisticated AI applications capable of interfacing with any data source, regardless of its scale. As a strong alternative to Carbon.ai, Supavec allows users to maintain full control over their AI architecture by providing the option for either a cloud-hosted solution or self-hosting on their own hardware. Employing modern technologies such as Supabase, Next.js, and TypeScript, Supavec is built for scalability, efficiently handling millions of documents while supporting concurrent processing and horizontal expansion. The platform emphasizes enterprise-level privacy through the implementation of Supabase Row Level Security (RLS), which ensures that data remains secure and confidential with stringent access controls. Developers benefit from a user-friendly API, comprehensive documentation, and smooth integration options, facilitating rapid setup and deployment of AI applications. Additionally, Supavec's commitment to enhancing user experience empowers developers to swiftly innovate, infusing their projects with advanced AI functionalities. This flexibility not only enhances productivity but also opens the door for creative applications in various industries.

Quickly launch and train customized AI-RAG Agents on Telegram with scalerX, enabling you to develop AI-driven personalized agents in just a few minutes, utilizing your own knowledge base for training. These AI agents can seamlessly integrate into Telegram, functioning within groups and channels, making them an excellent resource for educational purposes, customer service, entertainment, and sales, while also automating community moderation tasks. The agents are versatile, serving as chatbots for individual users, groups, and channels alike, and they support various formats including text-to-text, text-to-image, and voice interactions. Additionally, Access Control Lists (ACLs) enable you to manage agent usage limits and permissions for designated users. Training your agents is straightforward: simply create your agent, upload files to enhance the bot's knowledge base, or enable automatic synchronization with Dropbox, Google Drive, or even scrape content from webpages to enrich their training. By leveraging these features, you can ensure your agents remain effective and relevant in fulfilling user needs.

BGE, or BAAI General Embedding, functions as a comprehensive toolkit designed to enhance search performance and support Retrieval-Augmented Generation (RAG) applications. It includes features for model inference, evaluation, and fine-tuning of both embedding models and rerankers, facilitating the development of advanced information retrieval systems. Among its key components are embedders and rerankers, which can seamlessly integrate into RAG workflows, leading to marked improvements in the relevance and accuracy of search outputs. BGE supports a range of retrieval strategies, such as dense retrieval, multi-vector retrieval, and sparse retrieval, which enables it to adjust to various data types and retrieval scenarios. Users can conveniently access these models through platforms like Hugging Face, and the toolkit provides an array of tutorials and APIs for efficient implementation and customization of retrieval systems. By leveraging BGE, developers can create resilient and high-performance search solutions tailored to their specific needs, ultimately enhancing the overall user experience and satisfaction. Additionally, the inherent flexibility of BGE guarantees its capability to adapt to new technologies and methodologies as they emerge within the data retrieval field, ensuring its continued relevance and effectiveness. This adaptability not only meets current demands but also anticipates future trends in information retrieval.