Flex Capital

Thrilled to announce our participation in Confident AI (YC W25)'s $2.2M seed round! ?? We're backing this YC W25 company because of their innovative open-source approach to LLM evaluation. Their framework DeepEval has become one of the most widely adopted tools for testing LLM systems - an essential infrastructure layer as AI continues to transform every industry. We're always excited to support founders who bootstrapped their way to market leadership ?? Congrats to the Confident AI (YC W25) team!

Today I'm proud to announce Confident AI (YC W25)'s oversubscribed $2.2m seed round with participation from Y Combinator, Flex Capital, Oliver Jung, Vermilion Cliffs Ventures, January Capital, and Rebel Fund. Kritin Vongthongsri and I couldn't be more grateful for our investor's trust in our open-source approach to LLM evaluation. Prior to YC, we spent a whole year bootstrapping Confident AI out of our bedrooms for an entire year, building the open-source DeepEval and closed-source platform in adjacent and managed to grow it to one of the most adopted, if not already the most adopted, open-source LLM evaluation framework in the world, despite this competitive landscape against well-funded incumbents. We applied to YC with Confident AI, got accepted, and closed our seed round in 5 days. Now, we're ready to take what we've learnt from being a bootstrapped startup and scale this out to a bigger team: https://lnkd.in/guAPuhEE We believe that our approach to LLM evaluation and testing is the future of validating LLM systems and we also strongly believe in the importance of open-source software, especially in AI. We're going to double-down on providing better LLM evaluations for everyone, and this includes not just testing for functionality, but also for LLM safety. Thank you to all the amazing GPs at YC including Tom Blomfield, Matt Riley, Eli B., our new investors, including but not limited to Oliver Jung, Ashley Smith, Michael Ma, Matthew Mulvey, Nathaniel Montana, Hongfei Xia, Tomer London, my cofounder Kritin Vongthongsri, and most importantly all our users and customers that made this possible. PS. Don't forget to star DeepEval: https://lnkd.in/gmFaWYh7

?? Excited to announce our investment in CopyCat (YC W25)! As investors, we're focused on AI and developer tools that deliver immediate ROI. We couldn't be more excited to partner with the CopyCat team on their mission to make browser automation accessible to everyone.

Very cool launch ?? Generative AI Diligence from Fractional AI This fills a critical gap in understanding how AI creates (or erodes) value in your potential investments.

?? Our newest investment: Uniti AI joins the Flex Capital portfolio! We're backing Uniti AI in their $4M seed round because they're making AI agents a reality for commercial real estate. What makes Uniti special? They've built vertical-specific agents that understand the complex workflows of commercial real estate. ? Lead response times decreased from hours to seconds ? Customer conversion rates doubled ? Geographic reach: 10+ countries and growing ? Asset classes: office, multifamily, self-storage, and more Francesco and Emre built Uniti after seeing firsthand how tech adoption lags in real estate. Their platform bridges this gap by creating AI that truly understands industry workflows. We're thrilled to back founders who combine deep technical expertise with vertical-specific knowledge. The Uniti team exemplifies this perfectly. We're excited to be a part of their journey???

?? NEW EPISODE: Annie Duke on Decision Science in Venture Capital In this conversation, Auren Hoffman and former poker pro turned decision scientist Annie Duke explore: ? Mental accounting biases in portfolio decisions ? The psychology behind follow-on investments ? When to trust data vs. intuition in high-uncertainty environments ? A poker player's guide to reading body language Listen now: https://lnkd.in/ga6RhfsJ

?? Excited to announce our seed investment in FullEnrich! Most data providers today are limited in scope. Sales and marketing teams are stuck with subpar data that's limited by region, industry, or pricing models that make zero sense. The current standards are broken, and it's holding businesses back. That's why we are thrilled to announce our seed investment in FullEnrich, the world's most comprehensive data enrichment platform. FullEnrich has raised $2 million to expand its truly global solution, which aggregates data from over 20 sources in real time to deliver unparalleled accuracy and coverage. The FullEnrich team has already achieved impressive traction while bootstrapped, including: ?? Reaching seven-figure ARR? ?? Serving customers across the U.S., Europe, LATAM, APAC, and beyond ?? Offering a flexible, pay-as-you-go model with no per-seat fees FullEnrich is on a mission to revolutionize data accessibility, and we're honored to join them on this journey. Excited to support this exceptional team in transforming the industry!

We built FullEnrich with one goal: fixing data enrichment at a global scale. Today, we’re excited to announce our $2M seed round—a milestone that will allow us to accelerate product development, expand into new markets, and make FullEnrich the reference for data enrichment worldwide. We bootstrapped FullEnrich to a 7-figure ARR in one year with a lean team of five people. Now, with this funding, we are gearing up to 10x the number of clients we empower with high-quality, global data enrichment. Why FullEnrich Exists: The standards for data quality are broken. Businesses rely on outdated, incomplete, or regionally limited data providers, leading to inefficiencies across sales and marketing teams. We knew there had to be a better way. That’s why we built FullEnrich, the only truly global data enrichment platform, aggregating premium data providers while layering in advanced data quality processes. Our Waterfall & smart engine automatically selects the best sources based on a lead’s region and industry, ensuring the highest accuracy every time. A New Business Model That Changes the Game: We are not just fixing data enrichment—we are changing how companies access and pay for it. Unlike traditional providers that charge per user, FullEnrich is 100% usage-based. That means: ? Companies can invite their entire team at no additional cost ? Customers only pay for successful data enrichments ? No more expensive seat-based pricing—our model scales with your business needs On top of that, FullEnrich is built on a PLG + sales-assisted distribution model, meaning customers can test the platform and the quality of our data for free before making a decision. What’s Next? We are doubling down on product innovation with: ? CRM and RevTech integrations coming soon ? New data providers expanding our global coverage ? A major new feature by the end of the year that will change how businesses find leads A Huge Thank You: To my co-founders, employees, and the entire FullEnrich team—thank you for your trust, dedication, and relentless commitment. Building a startup is never easy, but anything is possible with a team like ours. Your energy, hard work, and belief in what we are creating push this company forward every day. To our thousands of customers—we are fully committed to delivering the most seamless user experience, the best data quality, and the highest enrichment rates available. If we cannot find your data, no one can. To our investors — Flex Capital, M-Fund Club, First Degree, Kima Ventures, and an incredible group of business angels—thank you for believing in our vision and backing our growth. The journey is just getting started. Let’s build.

?? Some big news: Paul Johnson ???????? is joining Flex Capital as our newest General Partner! Paul is an exceptional founder and investor who understands deeply what it takes to scale a business. As the founder of Lemonaid Health, he built a pioneering telehealth platform and successfully exited for $400M. He has since advised and served on the board of disruptive tech companies. His track record as both a founder and investor perfectly fits Flex’s unique approach, which puts Dual Threat CEOs - leaders who build and invest simultaneously - at the center of our strategy. We look forward to the journey ahead as Paul helps us empower amazing founders to build generational businesses. Read more on our blog: https://lnkd.in/etvwQ5YP

?? Great World of DaaS episode with Rajeev Goel, co-founder and CEO of PubMatic. Rajeev shares how PubMatic built their technical infrastructure to handle massive scale, including: ?? Processing 780B daily ad impressions (15 petabytes of data) ?? Creating 10-20% infrastructure efficiency gains year-over-year ?? Building their own private cloud instead of AWS ?? Infrastructure for real-time bidding at global scale Lots of great insights on making hard technical decisions that compound over time.