YC Summer 2026 (S26) founder

Sami Laakkonen

Founder of Last Accounting Company, AI-native accounting firm.

Company

Sami Laakkonen is listed as a founder of Last Accounting Company. Last Accounting Company (LAC) is a full-stack AI accounting firm. We sell the same service (bookkeeping, tax filings, etc.) as a traditional accounting firm, but underneath agents handle everything and a certified accountant signs off. Our service is faster, cheaper, and fully integrated, allowing our clients to focus on what matters, not accounting admin. LAC replaces both outsourced accountants and legacy accounting software for startups and SMBs. Our system is fully proprietary, from the general ledger to the accounting agents. This allows us to create powerful self-reinforcing loops and ultimately provide a state-of-the-art accounting service.

Founder traction evidence

Public posts and activity attributed directly to this founder.

  1. X

    Last Accounting Company (YC S26) is the agent-native accounting firm.

    Last Accounting Company (YC S26) is the agent-native accounting firm. LAC replaces both the traditional accounting firm and legacy accounting software with one end-to-end service. Our agents keep the general ledger always up to date while expert accountants validate everything

  2. X

    launching in 40'

    launching in 40'

  3. X

    bro what faze apex is in my yc batch!? i was literally the biggest fan growing up 😭

    bro what faze apex is in my yc batch!? i was literally the biggest fan growing up 😭

  4. X

    chat im on my last % is this founder mode

    chat im on my last % is this founder mode

  5. X

    feels good to be on the main quest for once

    feels good to be on the main quest for once

  6. X

    what are the best books/materials for learning theory of chess? ive played recreationally since a kid but would love to formalise my thinking

    what are the best books/materials for learning theory of chess? ive played recreationally since a kid but would love to formalise my thinking

  7. X

    we got to visit the @OpenAI office this week! super inspiring.

    we got to visit the @OpenAI office this week! super inspiring. having intelligence on an API still feels mind-blowingly magical to me PS. this is the only photo I took since I was afraid I’d accidentally photograph something top secret 🙈 https://t.co/CPY8cOxcpM

  8. X

    everybody talking about becoming dangerously good at something how about becoming dangerously whatever this is

    everybody talking about becoming dangerously good at something how about becoming dangerously whatever this is