A lot of people read YC RFS Spring 2026 as a trend list.
It s not. It s a signal of where work inside companies is quietly breaking.
Here s how this shows up in real teams:
Product teams
YC references @Cursor , but the opportunity isn t coding faster.
It s helping PMs synthesize interviews, metrics, and feedback to decide what to build next.
Finance and hedge funds
Firms like Renaissance, Bridgewater, and D.E. Shaw won by systematising decisions.
AI-native hedge funds push this further with continuous, machine-driven strategies.
Flexprice
Hey Product Hunt 👋
I'm Manish, founder of @Flexprice . After spending over couple of years building billing systems, I’ve felt this pain deeply: building products is getting easier, but charging for them is still hard.
Modern AI and API-first products need usage-based pricing, credit systems, free tiers, and feature access but implementing all of that feels like starting a second startup just to manage billing 😅.
We tried everything like Stripe Billing, Chargebee, and a few newer tools but none truly solved our needs beyond basic subscriptions. Eventually, we built our own billing system from scratch. It took us over 6 months and still felt like a never-ending cycle of bugs and edge cases.
Every developer or founder I’ve spoken to who deals with anything usage-based had a similar story
@Flexprice is an open-source billing and metering infrastructure built specifically for today’s AI and API-first products. You send your app’s usage events (API calls, GPU time, etc.) and @Flexprice takes care of🧑💻
Usage metering
Calculating charges or credit consumption
Feature access management
Generating accurate invoices
Launch Special 🚀
Use code PH200 for $200 off our hosted version (valid until June 30th)
We’ll be here all day to answer questions and share our building journey
Let’s chat!