The startup discovery engine. It reads the whole web so investors don't have to - 30 million companies, 190 million people, one search bar.
A partner at a venture fund opens a laptop on a Tuesday morning and types a sentence, not a spreadsheet formula. Something like: companies founded in the last eighteen months, two technical founders, headcount doubling, nobody's funded them yet. A few seconds later, a list comes back. Most of these companies have never sent a pitch deck to anyone. That is Harmonic on an ordinary day.
Harmonic calls itself the source of truth for startups, which is a bold thing to call yourself in a market that has spent a decade arguing about whose data is least wrong. The difference is that Harmonic isn't selling a directory you browse. It is selling the ability to ask a question and trust the answer - across more than 30 million companies and 190 million people, refreshed faster than the rest of the internet bothers to update.
"We're able to keep data up-to-date at scale, and merge together fragmented bits of structured and unstructured data from all over the web with confidence."
Max Ruderman, Co-founder & CEOEarly-stage investing has a quiet inefficiency at its center. The best companies are often invisible at exactly the moment they are most fundable. They have no press, no profile, sometimes no website - just two people, a repository, and a hiring page that quietly added three engineers last month. By the time a startup is easy to find, the round is usually closed.
So investors did what humans do when the signal is buried: they relied on their network, their inbox, and a good amount of luck. It worked, in the way that reading tea leaves works if you drink enough tea. The information existed - scattered across domain registrations, job boards, social profiles, and corporate filings - but nobody had stitched it into something you could actually query.
"Investors' networks are one of their most valuable assets - and almost nobody had turned that into data you could search."
On the gap Harmonic set out to closeThe origin story is less glamorous than the product, which is usually a good sign. Before Harmonic was a platform with an AI agent, it was a habit of scraping public corporate filings - the unglamorous paperwork every company in Delaware has to file - and noticing that this exhaust contained the earliest possible trace of a company being born.
Max Ruderman, who had worked on analytics, warehousing and machine learning at Google, co-founded the company in 2020 alongside Bryan Casey and Ajay Sohmshetty. The bet was simple to say and hard to do: if you could continuously merge the messy, fragmented data the web leaks every day - and keep it fresh - you could see startups forming in real time. Not the ones already on the leaderboards. The ones that don't have a leaderboard yet.
Harmonic processes millions of data points a day - social media, company sites, domain registrations, hiring boards, filings - and uses natural language processing and pattern recognition to verify and merge them into unified profiles. On top of that dataset sits a small toolkit, each piece pointed at the same job: find the right company before it's obvious.
30M+ companies and 190M+ people, with firmographics, team data, funding history and headcount trends - continuously refreshed.
An AI agent that answers plain-English questions about markets and companies and writes agentic research reports.
Granular multi-criteria search: founding date, fundraising, headcount growth, founder background, social signals.
Maps and monitors your team's connections, with real-time alerts on talent moves and company milestones.
Surfaces Harmonic insights on any webpage you're already looking at - no tab-switching required.
REST/GraphQL APIs and bulk delivery straight to your warehouse for enrichment at scale.
"If we bring this to sales teams, it lets teams bring their service and push forward at the right time."
Max Ruderman, on where the data goes nextMax Ruderman, Bryan Casey and Ajay Sohmshetty start Harmonic, building from public data exhaust.
Craft Ventures leads the seed round as Harmonic turns scraping into a product.
Sozo Ventures leads, with Craft and customer-turned-investor Floodgate joining. Total raised hits $30M.
Harmonic builds its investment research agent on LangGraph and LangSmith, so VCs can focus on founders.
30M+ companies, 190M+ people, a Chrome extension, an API, and a quarterly Hot 25 ranking.
There is a particular kind of endorsement that's hard to fake: when a customer likes the product so much they ask to put money in the company. Floodgate did exactly that - it used Harmonic, then invested. Sozo Ventures and Craft Ventures filled out the rest. As Harmonic likes to note, its backers were customers first.
The roster of who actually uses it is the more persuasive number. Roughly 150 customers, spanning funds and enterprises that don't sign up for tools casually.
"Four of our nine most recent deals were found on Harmonic."
Tier-1 venture fund, customer testimonialHarmonic frames its goal as fixing a matching problem. Capital exists. Founders exist. They just find each other too late, too randomly, and too often through who happened to know whom. Build the only complete startup database, the thinking goes, and you make those introductions earlier and on purpose.
The ambition doesn't stop at venture. The same engine that spots a company forming can tell a sales team when to reach out, or help talent find the startup that fits. Investing is the first market, not the last one. For a company that began by reading paperwork nobody wanted to read, that's a reasonable amount of nerve.
"The only complete startup database - so the right investment reaches founders at the right moment."
Harmonic's stated missionAs AI agents take over more of the grunt work, the edge stops being who can find data and becomes who has data worth trusting. Harmonic's bet on fresh, merged, verified company data is a bet that the next decade of investing, selling and recruiting will run on something better than gut and a warm intro.
Back to that Tuesday morning. The partner closes the laptop with a list of companies that, a few years ago, would have stayed invisible until it was too late to matter. The companies haven't changed. What changed is that someone finally made them searchable. That's the whole game, and Harmonic is quietly winning it.