TopK, Inc.

TopK, Inc. is a US-based search platform that specializes in advanced document databases, enabling efficient multi-vector and keyword search capabilities tailored for the AI era. TopK, Inc. operates as a document database company focused on enhancing search functionalities for various industries.

The company is headquartered in San Francisco, US. In July 2025, TopK raised USD 5. 5 million in Seed funding from investors including Earlybird Venture Capital, Irregular Expressions, and KAYA, marking the company's first recorded funding round. The funding will support the expansion of their engineering team, enhance enterprise-grade features, and provide better support for unstructured and multimodal data.

TopK offers a sophisticated document database designed specifically for the AI era, featuring advanced capabilities in multi-vector, keyword, and faceted search within a single, composable query. The core functionality enables users to combine both dense (vector) and sparse (keyword) retrieval methods to yield highly relevant top-k results. This innovative architecture is aimed at addressing the complexities in traditional search systems, improving relevance and efficiency in real-world applications. The platform supports various use cases, including semantic search across diverse data types such as text, images, video, and audio, and caters to a wide array of industries including technology, healthcare, and finance.

TopK’s solutions are deployed across global markets, providing services to enterprises seeking to enhance their search capabilities in both single-tenant and multi-tenant environments. TopK generates revenue through a provisioned capacity pricing model, ensuring predictable costs for its enterprise clients while delivering scalable performance. The company primarily engages in B2B transactions, offering subscription-based access to its powerful search engine tools, which include support and integration services. Clients can choose from a variety of deployment options, whether on their own cloud infrastructure or via TopK’s public cloud, tailored to meet specific business needs.

The service includes SDKs for multiple programming languages and connectors for popular databases, facilitating seamless integration into existing tech stacks. This structured approach to service delivery supports sustained high-performance operations, accommodating demanding workloads while maintaining a high service level agreement (SLA) of 99. 9% availability. In July 2025, TopK, Inc.

raised USD 5. 5 million in Seed funding, which will be utilized to expand its engineering team, enhance enterprise-grade features, and extend support for unstructured and multimodal data. The company plans to launch new products designed to further improve its search capabilities, aiming for a broader reach in the technology, healthcare, and finance sectors. Additionally, TopK is targeting expansion into new geographic regions to increase its market presence, although specific regions have yet to be disclosed.