Exa
Exa Labs · Search & web-data APIs
Search API for AI agents built on Exa's own web index, offering search, page contents, deep research and asynchronous agent endpoints with Python and JavaScript SDKs
ProprietaryFreemiumUsage-basedNov 2, 2026
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Hugging Face Hub
Hugging Face · Training & fine-tuning
Hosting platform for open models, datasets and Spaces demo apps built on git repositories and Xet storage, with Inference Providers, Endpoints, Jobs and an open-source Python client and CLI
MixedFreemiumPaidLocalNov 2, 2026
Pinecone
Pinecone Systems, Inc. · Vector databases
Fully managed, proprietary vector database service with serverless indexes, namespaces, metadata filtering and integrated embedding and reranking
ProprietaryFreemiumUsage-basedNov 2, 2026
Semantic Scholar
Allen Institute for AI (Ai2) · Literature discovery & review
Free AI-assisted literature search from Ai2 with an Academic Graph API, recommendations and downloadable datasets of papers, authors and citations
ProprietaryFreeNov 2, 2026
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