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Michael R. Bock
@michaelrbock
co-founder @columntax (acq). prev @waymo @pioneerdotapp @google. see my popular tweets using this side project i made: toptweets.by/@michaelrbock
San Francisco, CA
michaelrbock.com
Joined November 2009
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    Michael R. Bock
    @michaelrbock
    Dec 16, 2025
    1/ After 5 years, I’m proud to share that @ColumnTax has found a new home. We’ve been acquired by @AiwynAI. I couldn’t be more sure this is the right move for our business, tech, and team. These pics are the moments we started & sold the company:
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    Michael R. Bock
    @michaelrbock
    Nov 24, 2023
    tbt to the glory days of 2016 when an Uber was under $2
    9.9M
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    Michael R. Bock
    @michaelrbock
    Aug 9, 2022
    every month like clockwork AWS charges me $10.28 and i have no time or motivation to figure out why
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    Michael R. Bock
    @michaelrbock
    Jun 21, 2021
    we still desperately need more VCs who used to be software engineers
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    Michael R. Bock
    @michaelrbock
    Jan 10, 2023
    people underestimate how working at Google gives you access to the best free worldwide gym/lounge membership land in any major city in the world, work out at a beautiful gym, shower, get a coffee, and a full meal
    140K
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    Michael R. Bock
    @michaelrbock
    Mar 23, 2022
    the stripe to full-time angel investor to VC pipeline
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    Michael R. Bock
    @michaelrbock
    Feb 6, 2023
    a VC friend of mine told me that when a company won't respond to his outreach... he'll make a market map and *purposefully* put the company in the wrong category so the founder will respond asking for it to be fixed!
    157K
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    Michael R. Bock
    @michaelrbock
    Mar 10, 2023
    this is the perfect example of VCs' ability to predict the future from a VC in 3 months ago:
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    Michael R. Bock
    @michaelrbock
    Feb 25, 2021
    the essay was IT'S TIME TO BUILD, not IT'S TIME TO BECOME A VENTURE SCOUT
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    Michael R. Bock
    @michaelrbock
    Apr 26, 2024
    you wouldn’t last an hour in the asylum where they raised me
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    Michael R. Bock
    @michaelrbock
    Apr 20, 2021
    this guy is on every startup website 🙃 experiencewelcome.com roboflow.com/pro returnly.com/suite/ experts.webflow.com
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    Michael R. Bock
    @michaelrbock
    Jan 7, 2021
    wow - really helpful new warning label from Twitter
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    Michael R. Bock
    @michaelrbock
    May 17, 2022
    Thrilled to share we've raised $21.7m for @ColumnTax to scale up our fundamentally new tax filing product forbes.com/sites/igorbosi… It's been so much fun building the first-ever IRS authorized tax filing API with the amazing team here
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    Michael R. Bock
    @michaelrbock
    Jul 23, 2025
    1/ Can AI file your taxes? Not yet. We tested the latest frontier models and the results were full of catastrophic errors. Letting AI do your taxes would mean IRS rejections, audits, and penalties:
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