List of the Top 10 On-Prem Vector Databases in 2025

Vespa is designed for Big Data and AI, operating seamlessly online with unmatched efficiency, regardless of scale. It serves as a comprehensive search engine and vector database, enabling vector search (ANN), lexical search, and structured data queries all within a single request. The platform incorporates integrated machine-learning model inference, allowing users to leverage AI for real-time data interpretation. Developers often utilize Vespa to create recommendation systems that combine swift vector search capabilities with filtering and machine-learning model assessments for the items. To effectively build robust online applications that merge data with AI, it's essential to have more than just isolated solutions; you require a cohesive platform that unifies data processing and computing to ensure genuine scalability and reliability, while also preserving your innovative freedom—something that only Vespa accomplishes. With Vespa's established ability to scale and maintain high availability, it empowers users to develop search applications that are not just production-ready but also customizable to fit a wide array of features and requirements. This flexibility and power make Vespa an invaluable tool in the ever-evolving landscape of data-driven applications.

Postgres has introduced open-source capabilities for vector similarity searches. This advancement enables users to perform both precise and approximate nearest neighbor searches by using various metrics, including L2 distance, inner product, and cosine distance. Furthermore, this new feature significantly improves the database's efficiency in handling and analyzing intricate data sets, making it a valuable tool for data-driven applications. As a result, developers can leverage these capabilities to enhance their data processing workflows.

Chroma is an open-source embedding database tailored for applications in artificial intelligence. It comes equipped with an extensive array of tools that simplify the process for developers looking to incorporate embedding technology into their projects. The primary goal of Chroma is to create a database that is capable of continuous learning and improvement over time. Users are encouraged to take part in the development process by reporting issues, submitting pull requests, or participating in our Discord community where they can offer feature suggestions and connect with fellow users. Your contributions are essential as we aim to refine Chroma's features and overall user experience, ensuring it meets the evolving needs of the AI community. Engaging with Chroma not only helps shape its future but also fosters a collaborative environment for innovation.

Faiss is an advanced library specifically crafted for the efficient searching and clustering of dense vector datasets. It features algorithms that can handle vector collections of diverse sizes, even those surpassing the available RAM. Furthermore, the library provides tools that enable evaluation and parameter tuning to maximize efficiency. Developed in C++, Faiss also offers extensive Python wrappers, allowing a wider audience to utilize its capabilities. A significant aspect of Faiss is that many of its top-performing algorithms are designed for GPU acceleration, which significantly boosts processing speed. This library originates from Facebook AI Research, showcasing their dedication to the evolution of artificial intelligence technologies. Its flexibility and range of features render Faiss an essential tool for both researchers and developers in the field, enabling innovative applications and solutions. Overall, Faiss stands out as a critical resource in the landscape of AI development.

Txtai is a versatile open-source embeddings database designed to enhance semantic search, facilitate the orchestration of large language models, and optimize workflows related to language models. By integrating both sparse and dense vector indexes, alongside graph networks and relational databases, it establishes a robust foundation for vector search while acting as a significant knowledge repository for LLM-related applications. Users can take advantage of txtai to create autonomous agents, implement retrieval-augmented generation techniques, and build multi-modal workflows seamlessly. Notable features include SQL support for vector searches, compatibility with object storage, and functionalities for topic modeling, graph analysis, and indexing multiple data types. It supports the generation of embeddings from a wide array of data formats such as text, documents, audio, images, and video. Additionally, txtai offers language model-driven pipelines to handle various tasks, including LLM prompting, question-answering, labeling, transcription, translation, and summarization, thus significantly improving the efficiency of these operations. This groundbreaking platform not only simplifies intricate workflows but also enables developers to fully exploit the capabilities of artificial intelligence technologies, paving the way for innovative solutions across diverse fields.

An enterprise-grade database designed for handling time series, documents, and vectors. It allows for the storage of diverse data types while merging the ease and scalability of NoSQL with the capabilities of SQL. CrateDB stands out as a distributed database that executes queries in mere milliseconds, no matter the complexity, data volume, or speed of incoming data. This makes it an ideal solution for organizations that require rapid and efficient data processing.

Effortlessly transform your embeddings using a single, robust tool designed for simplicity and efficiency. Explore a comprehensive database engineered to provide embedding functionalities that once required multiple platforms, thus streamlining the enhancement of your machine learning projects with Embeddinghub. Embeddings act as compact numerical representations of various real-world entities and their relationships, depicted as vectors. They are typically created by first defining a supervised machine learning task, often known as a "surrogate problem." The main objective of embeddings is to capture the essential semantics of their source inputs, enabling them to be shared and utilized across different machine learning models for improved learning outcomes. With Embeddinghub, this entire process is not only simplified but also remarkably intuitive, allowing users to concentrate on their primary tasks without the burden of excessive complexity. Furthermore, the platform empowers users to achieve superior results in their projects by facilitating quick access to powerful embedding solutions.

Semantee is a user-friendly managed database designed for seamless configuration and enhanced semantic search capabilities. With a collection of REST APIs, it can be effortlessly integrated into various applications within minutes. This platform supports multilingual semantic search, making it suitable for applications of all sizes, whether deployed on-premise or in the cloud. It stands out due to its cost-effectiveness and transparency compared to many other providers, and it is particularly optimized for large-scale applications. Additionally, Semantee provides an abstraction layer for an e-shop's product catalog, allowing retailers to implement semantic search immediately without needing to modify their existing database configurations. This feature greatly simplifies the process and improves the overall efficiency of online shopping experiences.

Achieve a significant edge over competitors by leveraging the power of vector search to enhance your AI and ML workflow efficiencies. Streamline your processes, reduce infrastructure costs, and sustain your market position with an accelerated time-to-market that can be up to ten times faster than traditional methods. With ApertureDB’s integrated multimodal data management, you can dissolve data silos, allowing your AI teams to fully harness their innovative capabilities. Within mere days, establish and expand complex multimodal data systems capable of managing billions of objects, a task that typically takes months. By unifying multimodal data, advanced vector search features, and a state-of-the-art knowledge graph coupled with a powerful query engine, you can swiftly create AI applications that perform effectively at an enterprise scale. The productivity boost provided by ApertureDB for your AI and ML teams not only maximizes your AI investment returns but also enhances overall operational efficiency. You can try the platform for free or schedule a demonstration to see its capabilities in action. Furthermore, easily find relevant images by utilizing labels, geolocation, and specified points of interest. Prepare large-scale multimodal medical scans for both machine learning and clinical research purposes, ensuring your organization stays at the cutting edge of technological advancement. Embracing these innovations will significantly propel your organization into a future of limitless possibilities.

We have proactively bundled and configured all essential elements required for developing solutions and smoothly incorporating LLMs into your organization's workflows. With ConfidentialMind, you can begin right away. It offers an endpoint for the most cutting-edge open-source LLMs, such as Llama-2, effectively converting it into an internal LLM API. Imagine having ChatGPT functioning within your private cloud infrastructure; this is the pinnacle of security solutions available today. It integrates seamlessly with the APIs of top-tier hosted LLM providers, including Azure OpenAI, AWS Bedrock, and IBM, guaranteeing thorough integration. In addition, ConfidentialMind includes a user-friendly playground UI based on Streamlit, which presents a suite of LLM-driven productivity tools specifically designed for your organization, such as writing assistants and document analysis capabilities. It also includes a vector database, crucial for navigating vast knowledge repositories filled with thousands of documents. Moreover, it allows you to oversee access to the solutions created by your team while controlling the information that the LLMs can utilize, thereby bolstering data security and governance. By harnessing these features, you can foster innovation while ensuring your business operations remain compliant and secure. In this way, your organization can adapt to the ever-evolving demands of the digital landscape while maintaining a focus on safety and effectiveness.