A newsletter by a search veteran examining how AI assistants shape buyer behaviour and what Google referral data can and cannot show about it, plus research on how language models store and retrieve facts. It also offers commentary on Google's slow AI model rollout and its competitive position.
Website: https://theinference.io
Signal Lock publishes measured studies of how AI assistants like ChatGPT, Claude, Gemini and Perplexity describe local businesses, using counted answers and cited sources. Issues cover directory citations, the limits of free AI visibility scores, and a before-and-after test of a website rebuilt to be readable by AI assistants.
A weekly essay newsletter on discovery, judgment, and how people and algorithms decide what gets found, trusted, and chosen. Issues use concrete everyday anecdotes to explore the difficulty of searching for things you cannot name and how that connects to wider questions of recommendation and trust.
Ketan's newsletter covers databases and product engineering, with practical lessons such as when ORMs actually run queries and how to avoid common Elasticsearch pitfalls drawn from his experience at Intercom and Fin. Issues are infrequent and aim to be substantive, mixing architecture rationale, operational results and concrete code examples.
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