Best On-Premises Vector Databases of 2025

Vespa is forBig Data + AI, online. At any scale, with unbeatable performance. Vespa is a fully featured search engine and vector database. It supports vector search (ANN), lexical search, and search in structured data, all in the same query. Integrated machine-learned model inference allows you to apply AI to make sense of your data in real-time. Users build recommendation applications on Vespa, typically combining fast vector search and filtering with evaluation of machine-learned models over the items. To build production-worthy online applications that combine data and AI, you need more than point solutions: You need a platform that integrates data and compute to achieve true scalability and availability - and which does this without limiting your freedom to innovate. Only Vespa does this. Together with Vespa's proven scaling and high availability, this empowers you to create production-ready search applications at any scale and with any combination of features.

Postgres now features open-source vector similarity search capabilities. This allows for both exact and approximate nearest neighbor searches utilizing L2 distance, inner product, and cosine distance metrics. Additionally, this functionality enhances the database's ability to manage and analyze complex data efficiently.

Chroma is an open-source embedding database that is designed specifically for AI applications. It provides a comprehensive set of tools for working with embeddings, making it easier for developers to integrate this technology into their projects. Chroma is focused on developing a database that continually learns and evolves. You can contribute by addressing an issue, submitting a pull request, or joining our Discord community to share your feature suggestions and engage with other users. Your input is valuable as we strive to enhance Chroma's functionality and usability.

Faiss is a powerful library designed for the efficient search and clustering of dense vector data. It provides algorithms capable of searching through vector sets of varying sizes, even those that may exceed RAM capacity. Additionally, it includes tools for evaluation and fine-tuning parameters to optimize performance. Written in C++, Faiss offers comprehensive wrappers for Python, making it accessible for a broader range of users. Notably, many of its most effective algorithms are optimized for GPU execution, enhancing computational speed. This library is a product of Facebook AI Research, reflecting their commitment to advancing artificial intelligence technologies. Its versatility makes Faiss a valuable resource for researchers and developers alike.

Enhance your operational efficiency by leveraging a widely-used open-source solution managed by AWS. Implement auditing and data security measures with an architecture that includes built-in certifications for both data centers and networks. Proactively identify potential threats and respond to system conditions by utilizing machine learning, alert notifications, and visualization tools. Streamline your time and resources to focus on strategic initiatives. Gain secure access to real-time search capabilities, monitoring, and analysis of both business and operational data. Amazon OpenSearch Service simplifies the process of conducting interactive log analytics, monitoring applications in real-time, and enabling website search functionalities. As an open-source, distributed search and analytics suite that evolved from Elasticsearch, OpenSearch allows for extensive data exploration. Amazon OpenSearch Service provides users with the latest releases of OpenSearch, compatibility with 19 different versions of Elasticsearch (ranging from 1.5 to 7.10), and visualization features through OpenSearch dashboards and Kibana, ensuring a comprehensive toolkit for data management. This versatile service empowers organizations to harness data insights efficiently while maintaining a robust security posture.

Gain a competitive advantage by leveraging the capabilities of vector search technology. Optimize your AI/ML pipeline processes, minimize infrastructure expenses, and maintain a leading position with a remarkable improvement in time-to-market efficiency, achieving speeds up to 10 times faster. Eliminate data silos with ApertureDB's comprehensive multimodal data management system, empowering your AI teams to drive innovation. Establish and expand intricate multimodal data infrastructures capable of handling billions of objects across your organization in mere days instead of months. By integrating multimodal data, sophisticated vector search, and a groundbreaking knowledge graph, along with a robust query engine, you can accelerate the development of AI applications at scale for your enterprise. ApertureDB promises to boost the efficiency of your AI/ML teams and enhance the returns on your AI investments, utilizing all available data effectively. Experience it firsthand by trying it for free or arranging a demo to witness its capabilities. Discover pertinent images by leveraging labels, geolocation, and specific regions of interest, while also preparing extensive multi-modal medical scans for machine learning and clinical research endeavors. The platform not only streamlines data management but also enhances collaboration and insight generation across your organization.

txtai is a comprehensive open-source embeddings database that facilitates semantic search, orchestrates large language models, and streamlines language model workflows. It integrates sparse and dense vector indexes, graph networks, and relational databases, creating a solid infrastructure for vector search while serving as a valuable knowledge base for applications involving LLMs. Users can leverage txtai to design autonomous agents, execute retrieval-augmented generation strategies, and create multi-modal workflows. Among its standout features are support for vector search via SQL, integration with object storage, capabilities for topic modeling, graph analysis, and the ability to index multiple modalities. It enables the generation of embeddings from a diverse range of data types including text, documents, audio, images, and video. Furthermore, txtai provides pipelines driven by language models to manage various tasks like LLM prompting, question-answering, labeling, transcription, translation, and summarization, thereby enhancing the efficiency of these processes. This innovative platform not only simplifies complex workflows but also empowers developers to harness the full potential of AI technologies.

Oracle Autonomous Database is a cloud-based database solution that automates various management tasks, such as tuning, security, backups, and updates, through the use of machine learning, thereby minimizing the reliance on database administrators. It accommodates an extensive variety of data types and models, like SQL, JSON, graph, geospatial, text, and vectors, which empowers developers to create applications across diverse workloads without the necessity of multiple specialized databases. The inclusion of AI and machine learning features facilitates natural language queries, automatic data insights, and supports the creation of applications that leverage artificial intelligence. Additionally, it provides user-friendly tools for data loading, transformation, analysis, and governance, significantly decreasing the need for intervention from IT staff. Furthermore, it offers versatile deployment options, which range from serverless to dedicated setups on Oracle Cloud Infrastructure (OCI), along with the alternative of on-premises deployment using Exadata Cloud@Customer, ensuring flexibility to meet varying business needs. This comprehensive approach streamlines database management and empowers organizations to focus more on innovation rather than routine maintenance.

The enterprise database for time series, documents, and vectors. Store any type data and combine the simplicity and scalability NoSQL with SQL. CrateDB is a distributed database that runs queries in milliseconds regardless of the complexity, volume, and velocity.

Transform your embeddings effortlessly with a single, powerful tool. Discover an extensive database crafted to deliver embedding capabilities that previously necessitated several different platforms, making it easier than ever to enhance your machine learning endeavors swiftly and seamlessly with Embeddinghub. Embeddings serve as compact, numerical representations of various real-world entities and their interrelations, represented as vectors. Typically, they are generated by first establishing a supervised machine learning task, often referred to as a "surrogate problem." The primary goal of embeddings is to encapsulate the underlying semantics of their originating inputs, allowing them to be shared and repurposed for enhanced learning across multiple machine learning models. With Embeddinghub, achieving this process becomes not only streamlined but also incredibly user-friendly, ensuring that users can focus on their core functions without unnecessary complexity.

Semantee, a managed database that is easy to configure and optimized for semantic searches, is hassle-free. It is available as a set REST APIs that can be easily integrated into any application in minutes. It offers multilingual semantic searching for applications of any size, both on-premise and in the cloud. The product is significantly cheaper and more transparent than most providers, and is optimized for large-scale applications. Semantee also offers an abstraction layer over an e-shop's product catalog, enabling the store to utilize semantic search instantly without having to re-configure its database.

Couchbase distinguishes itself from other NoSQL databases by delivering an enterprise-grade, multicloud to edge solution that is equipped with the powerful features essential for mission-critical applications on a platform that is both highly scalable and reliable. This distributed cloud-native database operates seamlessly in contemporary dynamic settings, accommodating any cloud environment, whether it be customer-managed or a fully managed service. Leveraging open standards, Couchbase merges the advantages of NoSQL with the familiar structure of SQL, thereby facilitating a smoother transition from traditional mainframe and relational databases. Couchbase Server serves as a versatile, distributed database that integrates the benefits of relational database capabilities, including SQL and ACID transactions, with the adaptability of JSON, all built on a foundation that is remarkably fast and scalable. Its applications span various industries, catering to needs such as user profiles, dynamic product catalogs, generative AI applications, vector search, high-speed caching, and much more, making it an invaluable asset for organizations seeking efficiency and innovation.

Mixedbread is an advanced AI search engine that simplifies the creation of robust AI search and Retrieval-Augmented Generation (RAG) applications for users. It delivers a comprehensive AI search solution, featuring vector storage, models for embedding and reranking, as well as tools for document parsing. With Mixedbread, users can effortlessly convert unstructured data into smart search functionalities that enhance AI agents, chatbots, and knowledge management systems, all while minimizing complexity. The platform seamlessly integrates with popular services such as Google Drive, SharePoint, Notion, and Slack. Its vector storage capabilities allow users to establish operational search engines in just minutes and support a diverse range of over 100 languages. Mixedbread's embedding and reranking models have garnered more than 50 million downloads, demonstrating superior performance to OpenAI in both semantic search and RAG applications, all while being open-source and economically viable. Additionally, the document parser efficiently extracts text, tables, and layouts from a variety of formats, including PDFs and images, yielding clean, AI-compatible content that requires no manual intervention. This makes Mixedbread an ideal choice for those seeking to harness the power of AI in their search applications.

We have taken the initiative to bundle and set up all necessary components for crafting solutions and seamlessly integrating LLMs into your organizational workflows. With ConfidentialMind, you can immediately get started. It provides an endpoint for the most advanced open-source LLMs, such as Llama-2, effectively transforming it into an internal LLM API. Envision having ChatGPT operating within your personal cloud environment. This represents the utmost in security solutions available. It connects with the APIs of leading hosted LLM providers, including Azure OpenAI, AWS Bedrock, and IBM, ensuring comprehensive integration. Additionally, ConfidentialMind features a playground UI built on Streamlit, which offers a variety of LLM-driven productivity tools tailored for your organization, including writing assistants and document analysis tools. It also comes with a vector database, essential for efficiently sifting through extensive knowledge repositories containing thousands of documents. Furthermore, it empowers you to manage access to the solutions developed by your team and regulate what information the LLMs can access, enhancing data security and control. With these capabilities, you can drive innovation while ensuring compliance and safety within your business operations.