- conflicts or gaps
- [[{"field": {"value": "identity.founded_year", "source_urls": ["https://www.ycombinator.com/companies/mattermost", "https://forgeglobal.com/mattermost_ipo/", "https://venturebeat.com/business/mattermost-raises-50-million-to-advance-its-open-source-slack-alternative/", "https://web.archive.org/web/20181021111450/https:/www.mattermost.org/why-we-made-mattermost-an-open-source-slack-alternative/"]}, "issue": {"value": "Founding dates conflict across sources: SpinPunch legal entity 2011; Mattermost product open-sourced 2015; VentureBeat cofounded Mattermost 2014; Forge founded 2015; YC/LinkedIn founded 2016.", "source_urls": ["https://www.ycombinator.com/companies/mattermost", "https://forgeglobal.com/mattermost_ipo/", "https://venturebeat.com/business/mattermost-raises-50-million-to-advance-its-open-source-slack-alternative/", "https://web.archive.org/web/20181021111450/https:/www.mattermost.org/why-we-made-mattermost-an-open-source-slack-alternative/"]}}, {"field": {"value": "identity.yc_relationship", "source_urls": ["https://www.ycombinator.com/companies/mattermost", "https://techcrunch.com/2020/03/16/mattermost-ceo-ian-tien-on-building-a-successful-remote-team/"]}, "issue": {"value": "YC S12 batch affiliation is via predecessor SpinPunch (games), not the Mattermost messaging product at time of batch; product pivot occurred years later.", "source_urls": ["https://www.ycombinator.com/companies/mattermost", "https://techcrunch.com/2020/03/16/mattermost-ceo-ian-tien-on-building-a-successful-remote-team/", "https://web.archive.org/web/20181021111450/https:/www.mattermost.org/why-we-made-mattermost-an-open-source-slack-alternative/"]}}, {"field": {"value": "funding.total_raised_usd", "source_urls": ["https://venturebeat.com/business/mattermost-raises-50-million-to-advance-its-open-source-slack-alternative/", "https://forgeglobal.com/mattermost_ipo/", "https://www.cbinsights.com/company/mattermost", "https://startupintros.com/orgs/mattermost", "https://equityzen.com/company/mattermost/"]}, "issue": {"value": "Total funding reported inconsistently: ~$70M (VentureBeat/EquityZen), $70.4M (Craft.co), $72.6M (CB Insights), $73.54M (Forge), $74.8M (Startup Intros including $750K government contract).", "source_urls": ["https://venturebeat.com/business/mattermost-raises-50-million-to-advance-its-open-source-slack-alternative/", "https://forgeglobal.com/mattermost_ipo/", "https://www.cbinsights.com/company/mattermost", "https://startupintros.com/orgs/mattermost", "https://craft.co/mattermost"]}}, {"field": {"value": "employees.reported_counts", "source_urls": ["https://www.ycombinator.com/companies/mattermost", "https://www.linkedin.com/company/mattermost", "https://www.ycdb.co/company/mattermost", "https://leadiq.com/c/mattermost/5aa2a0915500006b012439c5"]}, "issue": {"value": "Headcount estimates vary: YC 120, LinkedIn 122, YCDB 150, LeadIQ ~155–160; no single authoritative current count published by company.", "source_urls": ["https://www.ycombinator.com/companies/mattermost", "https://www.linkedin.com/company/mattermost", "https://www.ycdb.co/company/mattermost", "https://leadiq.com/c/mattermost/5aa2a0915500006b012439c5"]}}, {"field": {"value": "founders[1].role", "source_urls": ["https://mattermost.com/about-us/corey-hulen/", "https://craft.co/mattermost", "https://www.bizjournals.com/sanjose/news/2019/06/19/mattermost-funding-y-combinator-slack-rival.html"]}, "issue": {"value": "Corey Hulen listed as CTO in 2019 press and Craft.co profile but currently CEO of Mattermost Federal and CTO Emeritus per company about page.", "source_urls": ["https://mattermost.com/about-us/corey-hulen/", "https://mattermost.com/about-us/", "https://craft.co/mattermost", "https://www.bizjournals.com/sanjose/news/2019/06/19/mattermost-funding-y-combinator-slack-rival.html"]}}, {"field": {"value": "funding.rounds[3]", "source_urls": ["https://mattermost.com/newsroom/press-releases/mattermost-completes-contract-with-u-s-air-force-618th-air-operations-center-to-deliver-real-time-mission-critical-communications/", "https://startupintros.com/news/2024-03-05-mattermost-grant"]}, "issue": {"value": "2024 $750K AFWERX SBIR Phase II contract completion is government contract revenue, not venture equity; some databases classify it as a grant funding round.", "source_urls": ["https://mattermost.com/newsroom/press-releases/mattermost-completes-contract-with-u-s-air-force-618th-air-operations-center-to-deliver-real-time-mission-critical-communications/", "https://startupintros.com/news/2024-03-05-mattermost-grant", "https://www.cbinsights.com/company/mattermost"]}}, {"field": {"value": "exit_status.last_known_valuation_usd", "source_urls": ["https://forgeglobal.com/mattermost_ipo/"]}, "issue": {"value": "Last public post-money valuation ($322.96M) is from June 2019 Series B; no verified later valuation or revenue figures found in reviewed primary sources.", "source_urls": ["https://forgeglobal.com/mattermost_ipo/", "https://www.linkedin.com/company/mattermost"]}}]]
- source urls
- ["https://breakoutstartups.substack.com/p/breakout-startups-23-mattermost", "https://craft.co/mattermost", "https://docs.mattermost.com/product-overview/faq-federal-procurement.html", "https://equityzen.com/company/mattermost/", "https://forgeglobal.com/mattermost_ipo/", "https://github.com/mattermost/mattermost", "https://grokipedia.com/page/Mattermost", "https://leadiq.com/c/mattermost/5aa2a0915500006b012439c5", "https://mattermost.com/", "https://mattermost.com/about-us/", "https://mattermost.com/about-us/corey-hulen/", "https://mattermost.com/about-us/ian-tien/", "https://mattermost.com/blog/mattermost-raises-20m-series-a-funding/", "https://mattermost.com/blog/yc-leads-50m-series-b-in-mattermost-as-open-source-slack-alternative/", "https://mattermost.com/newsroom/press-releases/mattermost-completes-contract-with-u-s-air-force-618th-air-operations-center-to-deliver-real-time-mission-critical-communications/", "https://mattermost.com/open-source-slack-alternative/", "https://mattermost.com/wp-content/uploads/2025/08/Platform-One-Acquisition-Summary.pdf", "https://startupintros.com/news/2024-03-05-mattermost-grant", "https://startupintros.com/orgs/mattermost", "https://techcrunch.com/2020/03/16/mattermost-ceo-ian-tien-on-building-a-successful-remote-team/", "https://techrepublic.com/article/how-open-source-mattermost-is-sneaking-up-on-slacks-messaging-empire/", "https://venturebeat.com/business/mattermost-raises-50-million-to-advance-its-open-source-slack-alternative/", "https://web.archive.org/web/20181021111450/https:/www.mattermost.org/why-we-made-mattermost-an-open-source-slack-alternative/", "https://www.bizjournals.com/sanjose/news/2019/06/19/mattermost-funding-y-combinator-slack-rival.html", "https://www.cbinsights.com/company/mattermost", "https://www.globenewswire.com/news-release/2019/02/05/1710577/0/en/Mattermost-Raises-20-Million-Series-A-Funding-to-Bring-High-Trust-Messaging-to-Security-Conscious-Enterprises.html", "https://www.globenewswire.com/news-release/2019/06/19/1871403/0/en/YC-Leads-50M-Series-B-in-Mattermost-the-Open-Source-Slack-Alternative.html", "https://www.linkedin.com/company/mattermost", "https://www.ycdb.co/company/mattermost", "https://www.ycombinator.com/companies/mattermost"]