How Exa is Building the Perfect Search Engine | Deep Dives with a16z
a16z Deep Dives · 2026-06-04 · 49 min
https://www.youtube.com/watch?v=k6OkMkDdbUYVideo summary
Exa CEO Will Bryk says agent search needs comprehensive results, and retrieval can cut customer token costs by up to 20x.
Exa cofounder and CEO Will Bryk tells a16z’s Sarah Wang that he began pursuing better search in college, then saw transformers make a new approach possible in 2021. Exa launched its search engine in November 2022, two weeks before ChatGPT, and later found demand from AI products. Bryk says agents need complex, controllable queries and comprehensive results—sometimes 1,000 or 10,000, not just 10—while businesses need search reliable enough for hiring, sales, and investment decisions. He argues retrieval lets smaller models work more effectively and says Exa can reduce customers’ costs by up to 20x. He also describes research using reinforcement learning on Exa search, predicts agentic search could exceed Google Search’s business by the 2030s, and says infrastructure and unrecorded data will become major bottlenecks. He closes on Exa’s culture: fun, ambitious work and hiring people with visible passion.
Chapters
- 0:00Exa Origin Story: Will Bryk’s 2021 mission to build better-than-Google search
- 2:35Beating Google With LLMs: Exa’s November 2022 launch and GPT-3 search vision
- 9:00Search Built For Agents: Exa’s semantic queries, chemical-formula keywords, and filters
- 11:27Search Built For Agents: Exa’s 10,000-result retrieval and LLM reranking
- 15:47Search Built For Agents: Agent search’s 99.9999% reliability bar
- 19:03Search Built For Agents: Exa’s go-to-market intelligence and search beyond the web
- 22:30Search Built for Agents: Exa Improves Devin’s Coding Retrieval
- 26:01Tokenpocalypse and Retrieval: Exa Says Retrieval Can Cut Costs 20x
- 29:21RL for Better Search: Exa’s Tool Used Fewer Calls with Higher Performance
- 32:23Benchmarks and Agentic TAM: Bryk Sees Agentic Search Exceeding Google Ads in 2030
- 36:52Benchmarks and Agentic TAM: 1,000x Search Growth Brings Infrastructure and Data Bottlenecks
- 40:19Benchmarks and Agentic TAM: Exa’s Goat, Mission-Driven Naming, and 10¹⁸ Meaning
- 44:20Culture Hiring and Wrap: Exa’s project freedom, search mission, and passion-led hiring
What the full analysis includes
13 chapters · 72 key points · 13 section summaries · mind map
Preview of the first chapter · Exa Origin Story: Will Bryk’s 2021 mission to build better-than-Google search
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