She Built the Infrastructure
Behind Every Release You Don't Notice
The last time an app updated without breaking, there's a decent chance LaunchDarkly was involved. Edith Harbaugh co-founded the company in 2014 with John Kodumal in Oakland, at a moment when "feature flags" wasn't a recognized software category - it was a workaround engineers hacked together themselves. She saw the gap and decided to fill it. A decade later, her platform evaluates more than 45 trillion feature flags every single day.
Harbaugh came to software through engineering - a B.S. from Harvey Mudd College, then an economics degree from Pomona College, then years working inside the kind of companies that would later become her customers. TripIt. Concur. Atlassian. She was building product and earning patents in deployment technology while watching large companies like Amazon and Netflix build elaborate internal infrastructure to control their software releases. Smaller teams couldn't afford that. LaunchDarkly became the answer.
The founding logic was precise: the Lean Startup movement had convinced a generation of engineers to ship fast and learn faster, but there was no safe infrastructure for that. You couldn't test with 5% of users before rolling out to everyone. You couldn't flip a switch to turn off a broken feature at 2 a.m. LaunchDarkly built that switch - and then sold it to every engineering team that had ever experienced a bad deploy on a Friday afternoon.
Harbaugh led the company as CEO for eight years, scaling it past $100M in annual recurring revenue and raising $330M in venture capital. The Series D alone - $200 million in August 2021 - was one of the landmark rounds in the developer tools category that year. LaunchDarkly has been named to Forbes Cloud 100 five times. When she stepped back to Executive Chair in 2022, the company had already become the default choice for engineering teams who needed to ship software without the accompanying terror.
She returned as CEO in 2025. The timing was not accidental. Generative AI had begun rewriting codebases at scale - teams were shipping AI-generated code faster than they could review it, and the question of how to control what code actually reached users had become more urgent than ever. LaunchDarkly's own AI Control Gap Report found that 73% of teams deploying AI listed unpredictable behavior as their top concern. Harbaugh came back to sell them the solution she'd spent a decade building.
"I'm thrilled to return as CEO and reignite our mission at a moment when generative AI is reshaping every codebase," she said on return. The statement was precise. Not boastful. Just accurate. Her company is infrastructure - the kind of infrastructure you only notice when it's not there.
Before she ran a company that handles trillions of operations daily, Harbaugh biked across the United States. All 3,361 miles of it. In 65 days. She talks about that ride the way other founders talk about their first failed startup - as formative. Rigid plans don't survive contact with roads under construction or cafes that close unexpectedly. You need a direction and the flexibility to get there differently than you intended. She applies the same thinking to building companies.
She also runs ultramarathons. This is not incidental detail. There's something revealing about an operator who finds clarity in sustained physical discomfort. The skill of going long - of managing energy, pacing the effort, ignoring the urge to stop when things get hard - translates directly into how she runs a company. LaunchDarkly took years to find its groove. Harbaugh was patient enough to wait it out.
On the side, she co-hosts "To Be Continuous," a podcast about software development and continuous delivery, with Paul Biggar through Heavybit. She angel invests through the Bloomberg Open Scout program, writing $25,000 checks with documented investment memos. She was making $100 bets on founders before she had any liquidity. Her definition of angel investing is characteristically plain: "someone who helps."
Her advice to founders is equally spare. Get customers on the phone before you write code. Make sure you have enough runway to execute while simultaneously chasing product-market fit and keeping the team intact. Focus on making customers successful - they become internal advocates who generate compounding growth. Don't go stealth. Tell people what you're building.
LaunchDarkly now works with over 5,500 organizations globally, including roughly 25% of Fortune 500 companies. Engineering teams at Atlassian, IBM, Intuit, and NBC use it to ship software safely, run A/B tests, and roll back broken releases in seconds rather than hours. It has become, quietly, part of how software actually gets to people.
Harbaugh built something that hides in plain sight. You can't see feature flags. You can't feel them. When they work, nothing happens - which is exactly the point. The goal was always to make shipping software less scary, one controlled release at a time. It turns out that's harder and more important than it sounds.