Corey Breier
Marketing Director | B2B SaaS Growth + Product | Former Founder
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About
👋 Hi there — I have over 10 years of experiences building and scaling growth and product functions at B2B SaaS startups, venture studios, and scale‑ups. Currently building the largest used bus marketplace in the world. --- 💼 Career Highlights: 📈 Invisible (now valued @ $2B) – Led growth team from 0 past first $1M revenue 🚀 Reciprocity (incubated @ Stanford) – Founded + led product/growth; bootstrapped to 20k users + $10k MRR ✔️ Vouched - Launched AgentShield app detecting AI Agent activity; drove 100s of signups 💰 DataGrail– Sourced 5× my marketing budget in net new revenue 🏗️ Portfolio T – Pitched our green building startup for $XM 📬 MailTime (YC S16) – Doubled onboarding rate + helped close $2M in funding 🛠️ Core Skills & Tools: - Growth Marketing, Product Management, B2B SaaS, Customer Discovery, Roadmap development, Agile and scrum, Product Lifecycle Management, Go-to-Market, Funnel + conversion rate optimization, LTV and CAC analysis, Performance Marketing, Google Analytics, SQL, A/B testing, outbound email.
Experience
Mar 2026
Scaling the #1 used bus marketplace in the world within a massive industry that software hasn't 'eaten' yet.
Aug 2025 to Jan 2026
Know Your Agent is KYC style identity verification for AI agents. - Led growth for a XFN team to launch AgentShield, which detects AI Agent activity on your website. - Drove thousands of ICP web visitors and converted hundreds of signups using paid channels. - Shipped ‘vibe coded’ website and database updates using Cursor, improving conversions 300%.
Jan 2024 to Dec 2024
Portfolio T was Mach49's corporate venture studio, where I led growth and product for a venture within the green real estate space. - Product lead for a team that successfully pitched our green building startup for $xM funding. - Wireframed customer feedback to inform design of Figma prototype that got an NPS score of 8. - Conducted 50+ customer interviews which informed the 3 key pain point features we launched with.
Sep 2019 to Feb 2023
Reciprocity was a bootstrapped B2B SaaS startup that matched asks and offers for help within professional communities using artificial intelligence and machine learning. - Sold dozens of customer communities comprising over 20,000 end users and averaging $10k MRR. - Managed contractor team of 5 to create a product users reported 30% more valuable than alternatives. - Led product for web and Slack apps, deploying a half-dozen new features per admin + user requests. - Conducted 100s of customer discovery interviews, leading to our Slack pivot and 7x more customers. - Revised user onboarding flow, leading to 5x more Asks created and 2x more Matches made.
Jun 2020 to May 2021
- Led demand generation via outbound/promos at privacy startup backed by Felicis/Okta/Hubspot/etc. - Managed $36k in quarterly budget for external partnerships, receiving a 20% performance raise. - Delivered 200% of my qualified leads target, directly leading to $150,000 in new revenue.
Jan 2016 to May 2019
- Founding team at 'human in the loop' AI assistant startup, now OpenAI's RLHF partner. - Led growth using referrals, outbound, and ads to deliver median of $20k MRR. - Sold first 100 clients, then managed a team of 5 past the first $1,00,000 in revenue. - One client prepaid $100,000 for an entire subscription year based off my services alone.
Jan 2015 to Jan 2016
- Doubled email messenger app's user onboarding rate, leading to millions of users today. - Managed partnerships with email market leaders like Return Path and Nylas. - Participated in fundraising activities that closed $2M in seed funding led by ZhenFund. - Cowrote our successful application to Y Combinator Spring 2016.
Education
Jan 2016
Product Manager Certification
Nov 2024 to Nov 2024
BA, International Studies - Political Science Major. Business Minor
Jan 2010 to Jan 2014
Study Abroad
Jan 2012 to Jan 2013