Moss

Moss, based in San Francisco, CA, provides a plug-and-play solution for developers to enable high-performance real-time semantic search across various platforms, enhancing user experiences through efficient data retrieval. Founded in 2024 in San Francisco, Moss specializes in semantic search technologies. The company has successfully completed its first deal as of November 2025, and during this period, it secured its initial round of SEED funding from Pioneer Fund. The founder has not been publicly detailed in available resources.

Moss offers a high-performance runtime for real-time semantic search, designed for developers building conversational, voice, and multimodal AI experiences. The core functionality of Moss revolves around its ability to index, package, and distribute data for instant retrieval, enabling sub-10 ms search responses across various platforms, including browsers, mobile devices, and cloud environments. This product is especially beneficial for use cases that require rapid access to contextual information, such as help centers, note-taking applications, and AI-native applications, where maintaining user context is critical. Moss serves over 250 teams, including developers in North America and Europe, aiming to enhance user interactions by providing fast, private, and offline-capable search solutions.

The company’s lightweight engine, which is less than 20kB, allows for easy integration into existing systems, further broadening its applicability in diverse industries. Moss generates revenue through a subscription-based model, charging clients for access to its semantic search capabilities, which include both cloud-based and on-device solutions. Clients typically engage in standard contractual agreements that outline terms for service usage and data management. The company's offerings include analytics and support features, bundled into tiered pricing plans that cater to different organizational needs.

By providing a fully managed service, Moss allows businesses to implement real-time search without significant infrastructure overhead, appealing to both B2B partnerships and direct-to-consumer applications. This revenue structure is designed to facilitate seamless integration for clients while ensuring continuous improvement and updates to the search functionalities provided. Moss plans to leverage the SEED funding secured in November 2025 to enhance its product offerings and expand into new geographic markets. The company is working on upcoming features that aim to further streamline semantic search capabilities for developers.

Specific target markets for expansion include Europe and Asia, with plans to enter these regions by 2026.