Exa
building embeddings-based search infrastructure
106 employees · est. 2021 · San Francisco, United States
Nuclia • The RAG-as-a-Service company
The modular RAG-as-a-Service for unstructured data.
27 employees · est. 2019 · Barcelona, Spain
Nuclia • The RAG-as-a-Service company is the older company (2021 vs 2019); Exa is the larger of the two.
Side-by-Side Comparison
| Metric | Exa | Nuclia • The RAG-as-a-Service company |
|---|---|---|
| Founded | ||
| Founded | 2021 | 2019 older |
| Headquarters | ||
| Headquarters | San Francisco, United States | Barcelona, Spain |
| Employees | ||
| Employees | 106 larger | 27 |
| Industry | ||
| Industry | AI, Social Media | AI, Machine Learning |
| Funding Stage | ||
| Funding Stage | Series B | Seed |
| Total Funding | ||
| Total Funding | $107.00M | $5.80M |
| Funding Rounds | ||
| Funding Rounds | 3 | 2 |
| Services | ||
| Services | AI-powered Web Searching, Content Crawling and Retrieval, Structured Research Output, API Integrations for Deep Search | Not tracked yet |
| Target Customers | ||
| Target Customers | Developers, Data Scientists, Tech Companies, Search Engine Optimization (SEO) Professionals, Research Institutions | Not tracked yet |
| Taxonomy | ||
| Taxonomy | Embeddings-based Search, Knowledge Organization, Representation Learning, Crawling Infrastructure, Large Language Models, Web Search API, AI Research Center, Data Layer Transformation, AI Ecosystem, Information Retrieval, Novel Algorithms, Intelligent Search, Machine Learning Models, Semantic Search | AI-powered Search Engine, API, Unstructured Data, Named Entity Recognition, Natural Language Understanding, Semantic Search, Neural Search Engine, Multilingual, Data Processing, Knowledge Management, Enterprise Search, Deep Learning, Artificial Intelligence |
| Website | ||
| Website | exa.ai | nuclia.com |
About Exa
Exa is a cutting-edge startup committed to revolutionizing the way knowledge is organized through its embeddings-based search infrastructure. Founded in 2021, this United States-headquartered company operates at the intersection of AI and Social Media, offering innovative solutions that enable large...
About Nuclia • The RAG-as-a-Service company
Nuclia is an AI and Machine Learning startup based in Spain founded in 2019. The company's slogan "The all-in-one RAG-as-a-Service platform for unstructured data" encapsulates its mission to provide an easy-to-use API for building AI-powered search engines in minutes. Nuclia's offering includes an e...
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Compiled from the BounceWatch company index. We last looked at Exa on 19 Dec 2025, and Nuclia • The RAG-as-a-Service company on 11 Jun 2025. Where a field is blank here, it means we have not recorded it — not that the answer is zero. How we source and date this.