{"id":"clm_BB6AF797684A","entity":"substack","predicate":"ceo","value":"Chris Best","value_json":{"note":"The page says co-founder Chris Best has been Substack's CEO since 2017. It gives no more precise start date, and it is a third-party page rather than Substack's own site.","check":{"on":"2026-11-01","url":"https://www.unifygtm.com/insights/executives/substack-ceo","pages":1,"quote":"Chris Best is the Chief Executive Officer and Co-founder of Substack. Chris has held the CEO seat since 2017, and was previously Software Development Intern at Airline Intelligence Systems.","outcome":"checked"},"verdict":"found","verified":"2026-11-01","precision":9,"missing_basic":true},"valid_from":"2017-01-01","valid_to":null,"published":null,"recorded":"2026-11-01","citation":{"plain":"AsOf. \"Substack ceo: Chris Best\", as of 2017-01-01. Claim clm_BB6AF797684A, https://asof.is/claim/clm_BB6AF797684A, accessed 2026-11-09. Source: https://www.unifygtm.com/insights/executives/substack-ceo.","url":"https://asof.is/claim/clm_BB6AF797684A","accessed":"2026-11-09"},"confidence":0.6,"status":"unverified","assertable":false,"why_not":"unverified","superseded_by":null,"supersedes":[],"first_seen_at":"2026-11-01T19:52:36.483642+00:00","updated_at":"2026-11-01T21:40:00.421277+00:00","sources":[{"url":"https://www.unifygtm.com/insights/executives/substack-ceo","tier":"secondary","publisher":"unifygtm.com","published_at":null}],"evidence":{"by":"page-read","on":"2026-11-01","quote":"Chris Best is the Chief Executive Officer and Co-founder of Substack. Chris has held the CEO seat since 2017, and was previously Software Development Intern at Airline Intelligence Systems.","url":"https://www.unifygtm.com/insights/executives/substack-ceo"},"legend":{"dates":"valid_from: when the claim took effect (a period figure: the day its period closed). published: the earliest day a source on the record published it (a filing's filing date, a post's date; null when no source carries one). recorded: the day AsOf first held it. A figure can take effect weeks before it is published.","citation":"citation: how to cite the row (plain: one sentence with the value, its as-of date, the claim id and URL, the day answered and the primary source; url: the claim page; accessed: the day answered). APA and BibTeX forms are on the claim page.","why_not":{"unverified":"Unverified: one source that is not primary, or a primary source below confidence 0.7. Asserted once a primary source or a second independent domain confirms it."},"checked_by":{"page-read":"its source page states the value and the date"}}}