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20 sectors · 200 sub-niches · Build-vs-invest tagged
One mixed list of “hot sectors” isn’t useful for builders or seed-stage investors. The actual opportunities are inside each sector — small, specific, often unbuilt. So we took the GitHub-signal sector map and split each one into the 10 sub-niches a builder could ship this quarter or an early-stage VC could write a first cheque into next week.
Every leaf carries the same four flags: build cost, deal velocity, signal shape (the GitHub-trending pattern that tells you a repo here is breaking out), and our build-vs-invest call. The data is curated; the live signal data on each sector page comes straight from the weekly GitHub momentum panel.
/niche-down/ai-ml
10 sub-nichesThe platform shift everyone is chasing — but the leverage is in narrow tooling, not yet-another general assistant.
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/niche-down/developer-tools
10 sub-nichesThe most overcrowded sector — but also the one with the highest signal-to-noise ratio for GitHub-trending repos.
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/niche-down/fintech
10 sub-nichesThe most fragmented stack in tech. Every workflow has a niche player and a 'we'll get to it' incumbent.
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/niche-down/healthcare
10 sub-nichesSales cycles are long but LTV is enormous. The AI wedge is real — and most categories still have open lanes.
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/niche-down/cybersecurity
10 sub-nichesAdjacent to AI growth. Every new agent layer creates new attack surfaces — the security wedge follows the platform shift.
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/niche-down/climate-tech
10 sub-nichesCapital is back. The software layers — accounting, marketplaces, monitoring — are where leverage compounds.
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/niche-down/data-infrastructure
10 sub-nichesEvery workload eventually wants a custom data backend. The library + SaaS combo wins.
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/niche-down/ecommerce-infrastructure
10 sub-nichesShopify is the platform. The leverage is on top: app store wins, AI-driven catalog, returns automation, post-purchase.
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/niche-down/edtech
10 sub-nichesAI is the catalyst the sector waited a decade for. Personalization, assessment, and credentialing are all up for grabs.
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/niche-down/enterprise-saas
10 sub-nichesAI is the wedge into the seat. Pick a workflow, replace the manual labor, win the budget.
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/niche-down/gaming
10 sub-nichesIndie + AI-asset wave is breaking. The infrastructure under the hood is where money flows quietly.
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/niche-down/agtech
10 sub-nichesHard to sell to. Long sales cycles. But the AI + sensor + climate convergence is real for the first time in 20 years.
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/niche-down/hr-tech
10 sub-nichesAI is rewriting recruiting, performance, and learning. Most incumbents are slow. The wedges are real.
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/niche-down/legal-tech
10 sub-nichesAI is the biggest disruption legal has seen. The wedge plays are vertical (immigration, IP, litigation) — not horizontal Harvey clones.
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/niche-down/proptech
10 sub-nichesReal estate is finally adopting software. The vertical SaaS opportunity is enormous — most categories still have a 2003-vintage incumbent.
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/niche-down/robotics
10 sub-nichesAI breakthroughs are unlocking robotics applications stuck for a decade. The software layer is where leverage compounds.
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/niche-down/social-community
10 sub-nichesGreg's home turf. The community-led category is enormous — but pSEO leverage is in the infrastructure, not the consumer apps.
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/niche-down/space-tech
10 sub-nichesHardware is hard. Software around space is where leverage compounds — data, comms, ops.
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/niche-down/supply-chain
10 sub-nichesBoring but enormous. Every workflow has 2003-vintage incumbents. AI + integrations win the upgrade.
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/niche-down/web3
10 sub-nichesSpeculative but real. Stablecoins, agent payments, and onchain compliance are the wedges that survive multiple cycles.
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How this map is built
The 20 top-level sectors are the same taxonomy the weekly GitHub momentum panel uses — they’re the categories under which repositories cluster when we scan the open-source population for engineering acceleration.
The sub-niches are editorial. Each is a small, specific opportunity where (a) the signal shape suggests something is breaking out, (b) an indie team could plausibly build it in a quarter or less, and (c) an early-stage check would be a reasonable first move. We don’t name the founders we track inside the paid product — that’s the buyer’s edge. The category-level commentary here is fair game.
How to read the build-vs-invest call
Last refreshed: this surface is regenerated from content/niches.ts on every deploy. Each sub-niche is a stable URL; the editorial commentary is updated when the underlying GitHub-signal pattern shifts.