Practitioner
People tracked by sustained practice.
Practitioners are those who have shaped the open source AI ecosystem through the depth, durability, and inspectability of their work.
Browse the knowledge base
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Harrison Chase
Harrison Chase co-created LangChain, the open-source framework that first made large language model chaining and tool-use accessible at scale, seeding the architecture patterns that now underlie most agentic AI development.
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Jerry Liu
Jerry Liu created LlamaIndex, the open-source data framework that established retrieval-augmented generation as an operational practice rather than a research concept, defining how language models connect to external knowledge.
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William Waites
William Waites is a researcher and operator developing formal methods for multi-agent AI coordination, author of the Artificial Organisations framework and creator of the Plumbing typed language for agent protocol specification.
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Andrej Karpathy
Andrej Karpathy models open, minimal, and independently reproducible AI research and education as an operating practice.
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Simon Willison
Simon Willison models rigorous, documented, and composable open-source practice at the intersection of data tooling and practical AI observability.
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Thomas Wolf
Thomas Wolf is a core operator in the open model weights movement, building the infrastructure that makes frontier AI accessible, inspectable, and redistributable.
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Timnit Gebru
Timnit Gebru operates at the intersection of algorithmic accountability, structural AI critique, and independent institutional design outside corporate capture.
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Peter Steinberger
Peter Steinberger is a developer-tooling operator whose work links open implementation, local agency, and AI-native software practice.
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Audrey Tang
Audrey Tang models public-interest technology practice where digital systems are designed as participatory civic infrastructure.
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Eliot Horowitz
Eliot Horowitz is shaping software-native robotics infrastructure, linking data, models, orchestration, and fleet operations.
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George Hotz
George Hotz represents a build-first autonomy practice that keeps software, hardware, and deployment constraints in one visible loop.
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Meredith Whittaker
Meredith Whittaker is a privacy-governance operator advancing secure communication infrastructure and public-interest technology accountability.
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Micah Bornfree
Micah Bornfree is an activist operator shaping strategy-first AI use for organizing contexts where narrative, coordination, and timing matter.
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Moxie Marlinspike
Moxie Marlinspike exemplifies security-first communication design, turning strong cryptography into usable public infrastructure.
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Yann LeCun
Yann LeCun is a leading operator in world-model research, pushing representation-first approaches for embodied and predictive intelligence.