# Source: https://businessownerindex.com/founder-reference/people/jack-dorsey-q335552/ U.S. founder reference library # Jack Dorsey Recorded founding associations · Bluesky · Block, Inc. · Bluesky Social PBC ## Founding associations Jack Dorsey is recorded as a founder of [Bluesky](https://businessownerindex.com/company-reference/bluesky-q78194383/), [Block, Inc.](https://businessownerindex.com/company-reference/block-inc-q110778747/), [Bluesky Social PBC](https://businessownerindex.com/company-reference/bluesky-social-pbc-q124304616/) in the cited public company records. The person record describes Jack Dorsey as American computer scientist, entrepreneur and co-founder of Twitter. ## [Bluesky](https://businessownerindex.com/company-reference/bluesky-q78194383/) American social networking service. Recorded founding year: 2021. Explore the [Bluesky company reference](https://businessownerindex.com/company-reference/bluesky-q78194383/) for the recorded cofounders, business context, and company-specific source trail. ## [Block, Inc.](https://businessownerindex.com/company-reference/block-inc-q110778747/) American financial services company. Recorded founding year: 2009. Explore the [Block, Inc. company reference](https://businessownerindex.com/company-reference/block-inc-q110778747/) for the recorded cofounders, business context, and company-specific source trail. ## [Bluesky Social PBC](https://businessownerindex.com/company-reference/bluesky-social-pbc-q124304616/) developer of the Bluesky social media platform. Recorded founding year: 2019. Explore the [Bluesky Social PBC company reference](https://businessownerindex.com/company-reference/bluesky-social-pbc-q124304616/) for the recorded cofounders, business context, and company-specific source trail. ## More from the public record These details describe the cited record as reviewed on October 9, 2026. They may describe an earlier period; they are not a current employment or operating-status check. Education in public record New York University · [View source field](https://www.wikidata.org/wiki/Q335552#P69) ## Research context: Service businesses For a service business, the useful research question is what the organization delivers and to whom. An agency, consulting firm, staffing provider, or logistics company may work under project, recurring, or transaction arrangements. A short directory description does not establish the firm’s present specialties, customer relationships, or capacity. ### Questions for researching Bluesky - Which current service pages define the work a customer can actually purchase? - Does the company history connect the founding team to the same organization named in the reference record? - Which public case studies or announcements help explain the business without assuming private client or revenue information? This sector context is a reading guide based on the company’s recorded description. It does not attribute a particular business model or capability to Bluesky without supporting evidence. ## Research context: Financial businesses Financial-business research requires attention to the specific organization and service described. Similar names can refer to a parent company, an operating subsidiary, or a consumer brand. A founder reference is background information; it does not verify the authorization, registration, or current services of any regulated provider. ### Questions for researching Block, Inc. - Which legal organization does the official site identify as providing the service? - Are the founding history and the present operating organization clearly distinguished? - Where does the provider direct readers to current registration and service information? This sector context is a reading guide based on the company’s recorded description. It does not attribute a particular business model or capability to Block, Inc. without supporting evidence. ## Research context: Technology and software When researching a technology business, distinguish the product from its delivery model. Software licensing, subscriptions, services, and hardware can describe different customer relationships even when companies operate in the same broad sector. A short public description rarely establishes the revenue model, the ownership of intellectual property, or the customer base. ### Questions for researching Bluesky Social PBC - Does the company describe a specific product, a service engagement, or a platform connecting other parties? - Which current product pages or dated announcements explain how the offering has changed since founding? - Are the founder biography and company history consistent about the original business and later changes? This sector context is a reading guide based on the company’s recorded description. It does not attribute a particular business model or capability to Bluesky Social PBC without supporting evidence. ## Follow the founding team Jack Dorsey’s association with [Bluesky](https://businessownerindex.com/company-reference/bluesky-q78194383/) can be researched alongside the company source record. The company’s recorded founding year is 2021. The shared company record is the evidence for this connection; it does not establish that these people currently work together. Jack Dorsey’s association with [Block, Inc.](https://businessownerindex.com/company-reference/block-inc-q110778747/) can be researched alongside [Jim McKelvey](https://businessownerindex.com/founder-reference/people/jim-mckelvey-q6196866/). The company’s recorded founding year is 2009. The shared company record is the evidence for this connection; it does not establish that these people currently work together. Jack Dorsey’s association with [Bluesky Social PBC](https://businessownerindex.com/company-reference/bluesky-social-pbc-q124304616/) can be researched alongside the company source record. The company’s recorded founding year is 2019. The shared company record is the evidence for this connection; it does not establish that these people currently work together. This reference library documents public founding associations. It is separate from our revenue-qualified growth profiles. Founding does not establish current ownership, employment, company revenue, or an AE client relationship. ## Public sources - [Wikidata public record Q335552](https://www.wikidata.org/wiki/Q335552): person identity and public description. - [Wikidata public record Q78194383](https://www.wikidata.org/wiki/Q78194383): founder association with Bluesky. - [Wikidata public record Q110778747](https://www.wikidata.org/wiki/Q110778747): founder association with Block, Inc.. - [Wikidata public record Q124304616](https://www.wikidata.org/wiki/Q124304616): founder association with Bluesky Social PBC. ## Using this founder record A founding association can remain historically meaningful after someone's role changes. This profile does not label Jack Dorsey as a current owner or executive, estimate personal income, or claim the person uses AE Tax Advisors. Confirm present responsibilities through current company information. For the separate collection with published historical growth evidence, explore our [growth-profile directory](https://businessownerindex.com/directory/). To add a company biography or correct an association, submit public evidence through the profile update form.[Browse founder reference ↗](https://businessownerindex.com/founder-reference/)[Submit a sourced correction ↗](https://businessownerindex.com/get-featured/?request=update) AE Tax Advisors owns and publishes Business Owner Index. These are public research records, not client testimonials.[Meet AE Tax Advisors ↗](https://businessownerindex.com/tax-strategists/) Owned and published by AE Tax Advisors ## You built the business. Plan what comes next. Bring the business and the owner's tax picture into the same conversation. 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