American founder, designer and software developer
Mack Myers is an American founder, designer and software developer based in Columbus, Ohio. He co-founded Pieces, an ambient AI memory platform, with Tsavo Knott. He served as Chief Product Officer and Chief Operating Officer from incorporation in 2020 until 2026.
At Pieces he led front-end engineering for the desktop application and owned the shared module architecture its plugins were built on. He was the largest single contributor to the flagship app, and ran the company's administrative operations alongside it.
Mack co-founded Pieces, an ambient AI memory platform, in Cincinnati with Tsavo Knott, and was there from incorporation until 2026. It shipped native desktop applications for macOS, Windows and Linux, plus plugins for the popular browsers and developer tools, reaching 114,283 registered people across 222 production releases.
He built the desktop client, owned the shared module architecture the plugins ran on, ran the company's operations, and stayed in the codebase throughout.
Mack co-founded Mesh with Tsavo Knott while the two were finishing at Miami. It was a collaboration tool for universities that built itself: the roster, the group and the shared workspace came pre-assembled, so students did not have to set all that up again every term. The company raised $600K and piloted on campus with Miami University, with the product built by an outsourced development firm for its first two years.
Mesh wound down in 2019 as Pieces was ramping up, so the two overlapped rather than one following the other.
Mack started at Miami University in biochemistry, then switched into mathematics, before graduating in Professional Writing in 2016.
He met Tsavo Knott at Miami and the two started Mesh before either had graduated. Mack skipped his own graduation ceremony to sit in a meeting closing the company's first $200K angel investment.
A command line tool for working across a lot of GitHub repositories at once. On any given day at Pieces he had issues and pull requests open across hundreds of them, and opening github.com for each one was the slow path. mbot filed an issue or triggered an AI review on his behalf from whatever window he already had in front of him. Repo aliases did most of the work. pfx meant pieces-app/pieces_for_x, so filing a bug against it was one line.
mbot issue pfx --title="Bug: fix the dark mode button sizing in the settings pane"A minimal task app for the things that come up in passing, work and personal in the same place. Flutter and Dart on the front, Firebase and Firebase Auth behind it. Shipped as a .dmg for macOS and through the iOS App Store.
Co-founder, CPO and COO at Pieces from incorporation to the last day. Set strategy with the CEO and owned product and operations for a business of ninety-three people across ten countries.
Desktop, web, mobile, CLI and plugin builds across the full stack. Lead front-end engineer on the Pieces desktop client, writing 5.7 times more of it than the next engineer, with the client's own database on top. 222 releases in under four years, across ten app stores and marketplaces.
Marketing sites, landing pages, documentation, and this one: brief, design, build, deploy and the analytics after, all done himself.
Drew Mesh for two years before a line of code existed, then designed every surface of the Pieces desktop client, its websites, email, social, release notes, conference booths and collateral down to the stickers. Laid out the office too.
Product demos, walkthroughs, release videos and launch clips, recorded and cut by him: capture through edit, motion and captions, to a finished file.
Dozens of junior employees came up under him at Pieces, not only engineers. 2,563 code reviews for 41 colleagues on the measurable side; the rest was sitting with someone until the work got better.
Ran a team of eight on the desktop client and set how code got reviewed there. Reviewed more than he authored in six of his eight active years, with a median time to merge of 1.7 hours.
$600K at Mesh, $26M at Pieces, from a $180,000 pre-seed SAFE through convertible notes, a priced Seed and a Series A at a $44M post-money led by Drive Capital. Built the decks and numbers with the CEO, then the legal work with counsel on every round.
Six years of Carta across two companies, run by him rather than a firm: issuances, option grants, conversions and the reporting.
Investor updates, board reporting and diligence, through a Seed, a Series A and the notes around them.
He and the CTO handled 3,127 support tickets between them, both while holding engineering jobs.
Talks to almost anyone: an engineer, a lawyer, an investor, a frustrated customer. He has run a security review with a public company's IT team and walked a first-time user through a hotkey in the same afternoon.
Negotiated the Google Cloud contract, $2.8M in its first year with credits attached that changed what the company could build. Held the working relationships with Microsoft, OpenAI, Anthropic, xAI, OpenRouter and Sentry.
Pricing, checkout and subscriptions on Stripe and Paddle, including the merchant-of-record call, for both individual and enterprise buyers.
Payroll, benefits, accounting, tax, banking, state registrations and vendors, run by hand for ninety-three people across ten countries.
State and federal filings and R&D tax credits, run with the company's accounting firm, plus taking Pieces through SOC 2 Type II himself to open up the buyers who required it.