# WhatsApp founder

entity: /record/whatsapp.md  
predicate: founder  
page: /record/whatsapp/founder  
as_of: 2026-10-31  

As of October 31, 2026, WhatsApp's founders on the AsOf record are Jan Koum and Brian Acton, each a claim of its own with its date, from 2 sources in all. The record holds 2 claims on WhatsApp's founder, 2 still open and 0 superseded, each dated and sourced; a replaced value is closed with an end date, never deleted.

## Current founder

What the record asserts on 2026-10-31.

- [WhatsApp](/record/whatsapp.md) | founder | Jan Koum | valid undated to present | conf 0.95 | valid | [clm_B0F4F425F06A](/claim/clm_B0F4F425F06A.md)
  sources: https://www.whatsapp.com/about?lang=fr_FR#:~:text=WhatsApp%20a%20%C3%A9t%C3%A9%20con%C3%A7u%20en,les%20plus%20intimes%20sur%20WhatsApp., https://www.wikidata.org/wiki/Q1049511
- [WhatsApp](/record/whatsapp.md) | founder | Brian Acton | valid undated to present | conf 0.95 | valid | [clm_CE4B35589DC4](/claim/clm_CE4B35589DC4.md)
  sources: https://www.whatsapp.com/about?lang=fr_FR#:~:text=WhatsApp%20a%20%C3%A9t%C3%A9%20con%C3%A7u%20en,les%20plus%20intimes%20sur%20WhatsApp., https://www.wikidata.org/wiki/Q1049511

## Every dated value

One claim per line, oldest first. Superseded claims stay visible.

- [WhatsApp](/record/whatsapp.md) | founder | Jan Koum | valid undated to present | conf 0.95 | valid | [clm_B0F4F425F06A](/claim/clm_B0F4F425F06A.md)
  sources: https://www.whatsapp.com/about?lang=fr_FR#:~:text=WhatsApp%20a%20%C3%A9t%C3%A9%20con%C3%A7u%20en,les%20plus%20intimes%20sur%20WhatsApp., https://www.wikidata.org/wiki/Q1049511
- [WhatsApp](/record/whatsapp.md) | founder | Brian Acton | valid undated to present | conf 0.95 | valid | [clm_CE4B35589DC4](/claim/clm_CE4B35589DC4.md)
  sources: https://www.whatsapp.com/about?lang=fr_FR#:~:text=WhatsApp%20a%20%C3%A9t%C3%A9%20con%C3%A7u%20en,les%20plus%20intimes%20sur%20WhatsApp., https://www.wikidata.org/wiki/Q1049511

## Questions this record answers

### Who are WhatsApp's founders?

Jan Koum (undated) and Brian Acton (undated), as the record asserts them on October 31, 2026.


## Get this data

- JSON: /v1/entities/whatsapp/founder (this fact) · /v1/entities/whatsapp?predicates=founder (with the entity's coverage; add as_of=YYYY-MM-DD for a date)
- MCP: entity_state(entity: "whatsapp", predicates: ["founder"], scope: "all")
- Entity twin: /record/whatsapp.md · timeline: /timelines/whatsapp.md

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AsOf is a temporal fact ledger: a structured, dated, sourced record of what is true and what changed, built for AI retrieval.