How to Find Breakout Startups Before They Raise

The best angel deals don't come from AngelList. They don't come from demo days, either.

By the time a founder is pitching at YC Demo Day or posting their raise on a syndication platform, three things have already happened: valuation has been set, the lead investor has been chosen, and the terms reflect competition. You're not sourcing at that point. You're allocating to something everyone else has already validated.

Real edge in angel investing comes from finding companies six to twelve months earlier, when the product exists but the pitch deck doesn't.

That window is visible if you know where to look.

The Demo Day Trap

Demo days are useful for one thing: seeing a large volume of teams quickly. But the pricing reflects that utility. Popular YC companies often close their batch rounds at caps that leave little room for the kind of return that justifies angel-stage risk.

AngelList is similar. Syndicates require a lead who's already done diligence. By the time something appears in your inbox, it's been through at least one filter that's also compressed the upside.

None of this means you shouldn't attend demo days. It means demo days shouldn't be your primary sourcing channel if you want the best terms on the best companies.

The founders building the most interesting things right now are not preparing pitch decks. They're shipping code, posting changelogs, answering questions on Reddit, and watching their GitHub star count tick up. That activity is public. And it tells you more about a company's trajectory than any pitch ever will.

What "Building in Public" Actually Signals

The last decade produced a generation of technical founders who default to transparency. Open-source repos, public roadmaps, "what I'm building" threads on Hacker News, Product Hunt launches with real screenshots instead of waitlist splash pages. This isn't just a marketing choice. it's a working style that leaves a measurable trail.

That trail is signal.

The key insight is that traction precedes funding. The best founders don't raise when they need money. They raise when they have leverage. And they only have leverage once something is already working. If you can read the signals that indicate "this is working," you can get to the founder before they feel that leverage. which means better terms, more accessible conversations, and sometimes a relationship that makes you the obvious choice for their first call on the next company.

GitHub: The Earliest Leading Indicator

GitHub is the most underrated deal sourcing tool for technical founders. Public repositories show you product maturity, team size, development velocity, and community interest. all before a company has a website worth visiting.

The metrics that matter most aren't absolute numbers. They're rates.

Star velocity. how quickly a repo is accumulating stars. is a proxy for word-of-mouth among developers. A repo that goes from 200 to 2,000 stars in six weeks is experiencing something organic. A repo with 10,000 stars accumulated over four years is just popular.

Fork rate tells you how many developers found the project useful enough to build on it. High fork-to-star ratios suggest a developer tool with real utility, not just interesting positioning.

Contributor growth. specifically, whether contributors outside the founding team are submitting meaningful pull requests. indicates that a community is forming. That's a different category of signal than a solo founder's side project.

Supabase is the canonical example. Before their seed round, they had over 2,000 GitHub stars and a small but active contributor base. The open-source Firebase alternative positioning was visible in the repo before it was in any pitch deck. Investors who were watching GitHub trending saw it; investors waiting for intros didn't.

Hacker News: Community Validation in Real Time

Hacker News Show HN posts are a reliable signal filter. The audience is technical, skeptical, and quick to identify both genuine innovation and marketing dressed up as product. A Show HN that reaches the front page and generates 200+ thoughtful comments is meaningful validation.

What you're looking for isn't just upvotes. Comments matter more. Specifically:

• Developers saying "I've been waiting for this" or "I just switched from X to this"
• Questions about the API, pricing, and enterprise tiers (buying intent)
• Founders of adjacent companies engaging seriously with the product

A Show HN that gets picked apart technically but still hits the top ten is often more interesting than one that coasts on novelty. Criticism means people care.

The same applies to Ask HN and relevant thread replies. Founders who answer questions directly, cite specific benchmarks, and engage with criticism rather than deflecting are showing you something about how they'll handle investor conversations, too.

Product Hunt: Traction You Can Measure in Hours

(See also: Product Hunt Launch Metrics That Actually Predict Long-Term Success)

Product Hunt launch day is a controlled experiment. Every product gets roughly the same starting conditions. the same date, the same discovery mechanism, the same voter pool. Which means launch performance is actually comparable across products.

Upvote velocity in the first two hours is the most predictive metric. Products that break 200 upvotes before noon PST almost always finish in the top five. Products with genuine developer communities behind them tend to show it here.

Beyond the number, read the comments for signal type. "I've been using this for three months and it saved my team two hours a day" is different from "Looks cool, will check it out." The former suggests an existing user base that predates the launch. That's a company worth tracking.

Combining Signals: Separating Noise from Momentum

No single signal is reliable in isolation. GitHub stars can be gamed. Product Hunt launches can be orchestrated. Hacker News is volatile.

The signal becomes signal when it converges across platforms independently.

A practical scoring approach: a company that trends on GitHub AND launches successfully on Product Hunt AND generates substantive Hacker News discussion within a 30-day window is experiencing something real. Three independent communities validating the same product is not coincidence.

Add Reddit to the mix. specifically, posts appearing organically in relevant communities like r/selfhosted, r/webdev, or r/startups. and you've got a four-platform confirmation that most institutional investors will never see until it's in TechCrunch.

That's your window.

The Manual Version Works. Until It Doesn't

You can do all of this by hand. Set up GitHub trending alerts. Bookmark the Show HN page. Check Product Hunt daily. Monitor relevant subreddits. Keep a spreadsheet.

Some angels do. They spend two to three hours every morning running their sourcing routine before doing anything else. (We compiled 7 free deal flow tools to make that routine faster.) For a full-time allocator with deal flow as a core competitive advantage, that time investment makes sense.

For everyone else. part-time angels, scouts with day jobs, operators who invest on the side. the manual version breaks down quickly. You miss a week when you're traveling. You add platforms and the spreadsheet becomes unmanageable. The signal gets buried in noise.

A Faster Path to Early Signal

beforeVC monitors GitHub trending, Hacker News, Product Hunt, and Reddit continuously, scores projects by cross-platform momentum, and surfaces the ones showing early breakout before they get institutional attention.

The scoring model weights velocity over volume and penalizes visibility. meaning something that's already widely covered gets ranked lower than something with equivalent momentum that almost no one has written about yet.

If you want the deal flow edge without the two-hour morning routine, that's what we're building.

Subscribe to the weekly digest. Every Friday, the five highest-signal projects from the past week. with a sourcing note explaining exactly where the signal came from and why it scored.

The first deal you find before the crowd will tell you whether the approach is worth your time.