20 sectors · 200 sub-niches · Build-vs-invest tagged
The riches are in the niches.
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-nichesAI & Machine Learning
The 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-nichesDeveloper Tools
The 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-nichesFintech
The 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-nichesHealthcare
Sales 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-nichesCybersecurity
Adjacent 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-nichesClimate Tech
Capital is back. The software layers, accounting, marketplaces, monitoring, are where leverage compounds.
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/niche-down/data-infrastructure
10 sub-nichesData Infrastructure
Every workload eventually wants a custom data backend. The library + SaaS combo wins.
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/niche-down/ecommerce-infrastructure
10 sub-nichesE-commerce Infrastructure
Shopify 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-nichesEdTech
AI 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-nichesEnterprise SaaS
AI 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-nichesGaming
Indie + AI-asset wave is breaking. The infrastructure under the hood is where money flows quietly.
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/niche-down/agtech
10 sub-nichesAgTech
Hard 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-nichesHR Tech
AI is rewriting recruiting, performance, and learning. Most incumbents are slow. The wedges are real.
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/niche-down/legal-tech
10 sub-nichesLegal Tech
AI 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-nichesPropTech
Real 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-nichesRobotics
AI 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-nichesSocial & Community
Greg'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-nichesSpace Tech
Hardware is hard. Software around space is where leverage compounds, data, comms, ops.
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/niche-down/supply-chain
10 sub-nichesSupply Chain
Boring but enormous. Every workflow has 2003-vintage incumbents. AI + integrations win the upgrade.
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/niche-down/web3
10 sub-nichesWeb3
Speculative but real. Stablecoins, agent payments, and onchain compliance are the wedges that survive multiple cycles.
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How this map is built
Sectors come from the GitHub signal. Sub-niches come from where the signal is breaking out.
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
Every sub-niche has the same four flags.
- Build cost: weekend, month, quarter, or team build. How big the upfront commitment is for an indie / small team.
- Deal velocity trickle, steady, hot, or frothy. How fast funded companies are landing in the category right now.
- Signal shape what the GitHub-trending pattern looks like when a repository in this niche is breaking out.
- Our take: the 2-3 sentence build-vs-invest call.
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Want the named companies moving inside these niches?
The map above is the category view. The weekly Acceleration Watch emails you the specific companies whose engineering is accelerating right now, ranked, in plain English, no code required. Free to start. Or test one sector for €7.
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.