Co-Star's Playbook for Founders
How "decision hygiene" became a $3B category — and why timing tools are the next founder productivity unlock
B2B SaaS
B2B SaaS highlights the tools running the modern economy — from compliance automation to workflow optimization. These opportunities reveal where software quietly transforms business infrastructure behind the scenes.
The Shopify Moment for AI Labor: Owning Worklines on MuleRun
MuleRun hit 600K users offering promotional economics to fill their marketplace. Workline owners capture value; single-agent builders get commoditized.
Review Gardening Agents: Build the Revenue Layer for Google Business Profile
Turn every Google review into repeat visits. Shops hit 90% response rates and capture 10-30 VIP contacts monthly from reviews alone.
Build the Auth0 of AI Context Control
Redaction destroys LLM context. Pseudonymization preserves it. Ship the governance control plane regulated industries will pay six figures for.
Build The PDGA For Padel (And Other Emerging Sports)
Padel facilities are multiplying faster than operational infrastructure. The ratings and portable identity layer is contested but not yet owned—and it's worth more than the booking system.
Build a $20M/Year Business Certifying Air
Brain function drops 2–4% in stuffy rooms. Biohackers measure it publicly. Coworking operators need verified proof before members start asking questions.
Sleep Tourism's Missing Standard: Become the Michelin Star Hotels Pay For
Hotels spend millions on sleep programs without third-party proof. Travelers will pay 10% more for verified quality, but no standard exists.
The Amazon Launch Manager Play
Book launch services jumped from $5K to $50K+. Nobody owns the middle market turning founder manuscripts into qualified leads.
The Creator Pension Fund Heist
Spotter raised $200M proving creator catalogs are worth billions. YouTube shipped localization tools that grow them. The operating company is still unbuilt.
Blueprint for Dogs (The Protocol Play)
Before Loyal's longevity drug launches in 2026, build the subscription protocol that owns 'Healthspan Age' for 94 million pet households.
The Black Book: Build a Private Intel Network for the Anti-Viral Economy
TikTok made gatekeeping valuable again. Build a paid trust network for recommendations that never go viral—and charge venues for access.
TurboTax for HVAC Rebates
California contractors are losing $8,000 rebates to paperwork errors while waiting 90 days for payment. Both problems need middleware.
AdWords for Main Street (Powered by Creators)
Creator-driven foot traffic is already a $15B market. What's missing: performance attribution infrastructure that small businesses trust and pay for.
The Backyard Landlord Operating System
One in five new California homes is now an ADU. The post-construction infrastructure to run them profitably doesn't exist yet.
DoorDash Just Opened the Taste Graph Gold Rush. Here's How You Win.
DoorDash's Zesty proves taste graphs beat social graphs. Beli and Letterboxd validated the model. The infrastructure layer is wide open.
Build the AI Music Passport Agencies Will Pay $999/Month For
Universal and Warner legitimized licensed AI music while Spotify mandated disclosures. Agencies deploying tracks commercially need compliance documentation that doesn't exist yet.
The $25K IRL Content Factory
Experiential budgets hit $128B but can't prove ROI. Build the productized stunt studio that turns one-day activations into measurable 30-day content pipelines.
Turn Cult Restaurant Sauces Into Shelf Revenue
Campbell paid $2.7B for Rao's restaurant sauce. Independent restaurants can't navigate FDA compliance to capture the same $368B opportunity.
Snack Drop Hunter + Data Play
QSRs run $200K limited drops with no real-time visibility. Build the verified hunt map that becomes their demand oracle.
Build the Training Layer Series B Companies Actually Need
L&D headcount down 4%, external training spend up 23%—Series B companies need workflow training that auto-updates when their SaaS tools change.
The Living Room Franchise
Silent reading events surged 223% while commercial real estate bleeds off-peak. The format scales, the membership model is missing.
The Missing macOS Layer for Dasung's $2,000 E-Ink Monitors
E-ink monitor displaying crisp text, macOS menu bar, eye strain relief icon, Dasung company logo, VS Code editor interface
Search In The AI Age (Build What Google Can't)
AI-generated content now sits at 17-19% of search results. RAG teams manually rebuild allowlists. Build the trust graph as infrastructure before specialized data providers do.
The Stripe Play for AI Companion Apps (Collect the $5M Compliance Toll)
New York and California mandated crisis detection for AI companions. 337 apps need compliance infrastructure by January. None want to build it themselves.