The AI Stack
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The directory

Companies

Every company building a layer of the AI stack — searchable, filterable, and cross-referenced against investors and roles.

440Tracked
CompanyLayerPrimary patternStage
ParallelL6 Applications & ProductsData AnalyticsSpeculative
PathwayL4 Models & TrainingSpeculative
Patronus AIL5 Orchestration & FrameworksSpeculative
PebblebedL4 Models & TrainingSpeculative
Periodic LabsL6 Applications & ProductsData AnalyticsSpeculative
PerplexityL6 Applications & ProductsGrowth
Perplexity AI, Inc.L6 Applications & ProductsGrowth
pgvectorL3 Data & StorageVector DB ExtensionGrowth
PhyloL6 Applications & ProductsHealthcareSpeculative
Physical IntelligenceL6 Applications & ProductsSpeculative
PikaL6 Applications & ProductsVideo Generation & EditingSpeculative
PineconeL3 Data & StoragePurpose-Built Vector DBGrowth
PortkeyL5 Orchestration & FrameworksSpeculative
PostHogL6 Applications & ProductsData AnalyticsGrowth
Prefect TechnologiesL5 Orchestration & FrameworksGrowth
Prime Intellect, Inc.L2 Cloud & VirtualizationSpeculative
ProfoundL6 Applications & ProductsEnterprise Search & KnowledgeGrowth
PromptQLL5 Orchestration & FrameworksSpeculative
PryonL3 Data & StorageSearch & RetrievalGrowth
PuzzleL6 Applications & ProductsFinanceGrowth
Pydantic AIL5 Orchestration & FrameworksSingle-Agent SDKsSpeculative
QdrantL3 Data & StoragePurpose-Built Vector DBGrowth
Qdrant Solutions GmbHL3 Data & StorageGrowth
QTS Realty TrustL0 Physical InfrastructureWholesale / Hyperscale LeasingGrowth
QualcommQCOML1 Silicon & ComputeDominant
Showing 301325 of 440