Moss

Real-time semantic search runtime for AI agents and voice agents that keeps retrieval inside the agent's own process, in the browser, on the edge, on the device or in the cloud, so queries answer in under 10 ms without a separate vector database.

StageUndisclosed

Founded2024

HeadquartersSan Francisco, USA

StatusPrivate

Founded — ycombinator.com · 18 Oct 2026

moss.dev

Product

Selected offerings — the AI products recorded here, not the vendor's full catalogue.

Moss Infrastructure service Sold on its own

Semantic search runtime for AI agents that indexes documents and answers queries inside the agent's own process, in the browser, on edge runtimes, on devices or in the cloud, with Python and TypeScript SDKs and an MCP server; free developer plan, then $30 and $200 monthly plans plus usage costs.

Similar products 25

No sourced competitor yet: no filing, vendor document or measured-market report read so far names a rival for this company, so none is asserted. The companies below are the closest by what their products do.

How this list is ranked ↗

All 25Shared product type 12Same company status 16

RedisUndisclosedMoss and Redis Iris both list vector search; scale not recorded for either.1 of 2 capabilitiesShared product typeCompare Q

QdrantUndisclosedMoss and Qdrant both list vector search; scale not recorded for either; ships API service and data service rather than the same layer.2 of 2 capabilitiesDifferent layerCompare A

AlgoliaUndisclosedMoss and Algolia NeuralSearch and Generative Experiences both list vector search; scale not recorded for either.2 of 2 capabilitiesShared product typeCompare E

ElasticPublicMoss and Elasticsearch both list vector search; Moss's scale not recorded.2 of 2 capabilitiesShared product typeCompare P

PineconeUndisclosedMoss and Pinecone both list vector search; scale not recorded for either.2 of 2 capabilitiesShared product typeCompare W

WeaviateUndisclosedMoss and Weaviate Database both list vector search; scale not recorded for either; ships AI agent and API service rather than the same layer.2 of 2 capabilitiesDifferent layerCompare S

SnowflakePublicMoss and Cortex Search both list vector search; Moss's scale not recorded; ships AI agent, API service and 2 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompare L

LlamaIndexUndisclosedMoss and LlamaIndex Index both list vector search; scale not recorded for either; ships API service, agent platform and 2 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompare N

Neo4jLate-stageMoss and Neo4j AuraDB both list vector search; Moss's scale not recorded; ships agent platform, application and 1 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompare D

DatabricksLate-stageMoss and Databricks AI Search both list vector search; Moss's scale not recorded.2 of 2 capabilitiesShared product typeCompare C

CoveoPublicMoss and Coveo Generative Answering and Agentic AI both list vector search; scale not recorded for either; ships API service, application and 2 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompare C

ClickHouseLate-stageMoss and ClickHouse Cloud both list vector search; scale not recorded for either; ships agent platform, application and 2 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompare Z

ZepUndisclosedMoss and Graphiti both list vector search; scale not recorded for either.2 of 2 capabilitiesShared product typeCompare HC

Huawei CloudUndisclosedMoss and Image Search both list vector search; scale not recorded for either.2 of 2 capabilitiesShared product typeCompare E

EncordUndisclosedMoss and Encord Index both list vector search; scale not recorded for either; ships AI agent, agent platform and 2 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompare L

LabelboxLate-stageMoss and Catalog both list vector search; scale not recorded for either; ships agent platform, application and 3 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompare C

CohereLate-stageMoss and Cohere Platform both list vector search; Moss's scale not recorded.2 of 2 capabilitiesShared product typeCompare O

OraclePublicMoss and Oracle AI Vector Search both list vector search; Moss's scale not recorded.2 of 2 capabilitiesShared product typeCompare CA

Contextual AILate-stageMoss and Contextual AI RAG Component APIs both list vector search; scale not recorded for either; ships API service, agent platform and 1 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompare V

VectaraEarly-stageMoss and Vectara Platform both list vector search; scale not recorded for either.2 of 2 capabilitiesShared product typeCompare T

TwilioPublicMoss and Enterprise Knowledge both list vector search; Moss's scale not recorded; ships API service, application and 3 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompare T

TencentPublicMoss and Tencent Cloud VectorDB both list vector search; Moss's scale not recorded.2 of 2 capabilitiesShared product typeCompare L

LightOnPublicMoss and LightOn API both list vector search; Moss's scale not recorded; ships API service, application and 1 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompare M

MicrosoftPublicMoss and Azure AI Search both list vector search; Moss's scale not recorded; ships AI agent, API service and 6 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompare A

AmazonPublicMoss and Amazon Kendra both list vector search; Moss's scale not recorded.2 of 2 capabilitiesShared product typeCompare

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Closest alternatives are pairs a vendor page itself compares. Similar products are matched from what each product does; nothing in that group is asserted as a rivalry.