It’s May 22, 2025, and we’re back with your daily funding rundown, where the capital’s flowing, who’s cutting the checks, and which startups are stepping into the spotlight.
From federated AI and longevity biotech to concrete decarbonization and crypto identity, today’s lineup showcases how broad—and bold—the startup world remains. Some companies raised quietly, others made noise with massive rounds, but all are betting big on the future.
Funding Highlights
Today’s standout fundings include World’s $135 million crypto-backed raise to expand its digital ID mission, Siro’s $50 million Series B to bring AI to face-to-face sales, and RevenueCat’s $50 million Series C to fuel in-app monetization for thousands of apps. Meanwhile, David AI grabbed $25 million to advance audio data infrastructure, and Fore Bio raised $38 million more to push cancer treatment forward.
Investor Activity
Veteran backers like Andreessen Horowitz, Bain Capital, and Index Ventures are doubling down on high-conviction bets, while newer players like Alt Capital and ABN AMRO’s climate fund are backing innovation in voice, carbon, and construction. From early-stage AI to late-stage biotech, it’s a mix of bold vision and deep pockets.
These fundings underscore an active, if selective, market—one that continues to reward startups with strong technical chops and a clear growth path, especially in tough-to-crack sectors like healthcare, finance, and infrastructure.
Below is a breakdown of every round we tracked today, complete with summaries, funding details, and investor context to get you caught up fast.
Siro Raises $50 M Series B for AI-Powered Sales Coaching Platform
Siro, an AI-driven conversation intelligence platform for field sales teams, has secured a $50 million Series B round to expand its AI coaching app for in-person sales reps. The Berkeley, CA-based startup transcribes and analyzes face-to-face sales meetings, enabling sales managers to capture insights from real-world conversations and coach their teams with data-driven feedback. The fresh funding will help Siro accelerate product development and scale its team as it brings “AI note-taker” capabilities to on-the-ground sales interactions. SignalFire led the round, joined by notable tech investors and angels, underscoring confidence in Siro’s vision to digitize offline sales engagement.
Funding Details:
-
Startup: Siro
-
Investors: SignalFire (lead), 01 Advisors (Dick Costolo & Adam Bain), Square CPO Saumil Mehta, Squire founders Songe LaRon & Dave Salvant, ex-Yelp SVP Michael Stoppelman, ex-Snap VP Ding Zhou
-
Amount Raised: $50 million
-
Total Raised: $75 million
-
Funding Stage: Series B
-
Funding Date: May 22, 2025
RevenueCat Raises $50 M Series C for App Monetization Infrastructure
RevenueCat, a San Francisco-based platform for managing in-app subscriptions and purchases, announced a $50 million Series C raise to expand its global app monetization infrastructure. Trusted by over 50,000 mobile apps, RevenueCat provides developers with tools and analytics to implement subscriptions, virtual currencies, and other revenue features without heavy backend work. The new capital, which brings the company’s total funding to $100 million, will fuel growth in response to surging demand from AI-driven consumer apps and gaming platforms. As more software developers rely on RevenueCat’s APIs and dashboards to drive subscription revenue, the funding will support scaling its platform and developer support worldwide.
Funding Details:
-
Startup: RevenueCat
-
Investors: Bain Capital Ventures (lead), Index Ventures, Y Combinator, Adjacent, Volo Ventures, SaaStr Fund
-
Amount Raised: $50 million
-
Total Raised: $100 million
-
Funding Stage: Series C
-
Funding Date: May 22, 2025
David AI Raises $25 M Series A for Audio Data Research Platform
David AI, a San Francisco-based audio AI data startup, has raised $25 million in Series A funding to build out its “audio data research” platform. Founded in 2024, David AI partners with leading AI labs to develop high-quality, proprietary audio datasets – a critical resource for training voice-based AI models. The company’s mission is to bring AI into the real world through voice, addressing a shortage of rich audio training data for applications like humanoid robots, wearables, and virtual assistants. The Series A, co-led by Alt Capital and Amplify Partners, will allow David AI to scale its data collection and R&D efforts as it works to become the world’s first dedicated audio data research company.
Funding Details:
-
Startup: David AI
-
Investors: Alt Capital (co-lead), Amplify Partners (co-lead), First Round Capital, Y Combinator, BoxGroup, Jack Altman (angel)
-
Amount Raised: $25 million
-
Total Raised: $30 million
-
Funding Stage: Series A
-
Funding Date: May 22, 2025
Rhino Federated Computing Raises $15 M Series A for Federated AI in Healthcare and Finance
Rhino Federated Computing (Rhino FCP), a Boston-headquartered startup enabling secure federated AI collaboration across regulated industries, closed an oversubscribed $15 million Series A round. Founded by experts in medical AI and enterprise data systems, Rhino FCP’s platform lets institutions like hospitals, pharma companies, and banks jointly develop AI models on distributed data, avoiding data centralization and privacy risks.
The new funding will help Rhino scale its enterprise-grade federated learning solutions to more customers in healthcare and financial services, where organizations seek to leverage collective data insights without compromising compliance. The round’s strong support reflects growing demand for privacy-preserving AI tools that unlock data value across organizational and geographic silos.
Funding Details:
-
Startup: Rhino Federated Computing (Rhino FCP)
-
Investors: AlleyCorp (lead), LionBird, Fusion Fund, Arkin Digital Health, Qiming Venture Partners USA, Telus Ventures, Keren Maccabi, Wilson’s Bird Capital, Frank Sica, Gaingels
-
Amount Raised: $15 million
-
Total Raised: $30 million+
-
Funding Stage: Series A
-
Funding Date: May 22, 2025
World Raises $135 M to Expand Worldcoin Crypto and Digital ID Project
World, the crypto-based digital identity project co-founded by Sam Altman (behind Worldcoin and World ID), has raised $135 million in fresh funding to fuel its expansion across the U.S. and globally. Rather than a traditional equity round, the project’s financing comes via the sale of Worldcoin (WLD) tokens from its treasury to private investors. Andreessen Horowitz (a16z) and Bain Capital Crypto, two of the World’s earliest backers, purchased the new tokens, with participation from Selini Capital, Mirana Ventures, and Arctic Digital. World plans to use the funds to deploy thousands more of its biometric “Orb” devices, which scan users’ irises to verify personhood, and to bolster its digital ID and crypto payment infrastructure. The raise (following a $59.5 M token sale last year) provides World with significant capital as it navigates rapid user growth and global regulatory challenges in the controversial crypto identity space.
Funding Details:
-
Startup: World (Tools for Humanity / Worldcoin project)
-
Investors: Andreessen Horowitz (lead purchaser), Bain Capital Crypto, Selini Capital, Mirana Ventures, Arctic Digital
-
Amount Raised: $135 million (via token sale)
-
Total Raised: Not disclosed (prior token sale of ~$59.5 million in 2024)
-
Funding Stage: Private token funding round
-
Funding Date: May 22, 2025
Fore Biotherapeutics Raises $38 M Series D-2 to Advance Precision Cancer Therapy
Fore Biotherapeutics, a Philadelphia-based oncology company, secured $38 million in a Series D-2 financing to continue developing its targeted cancer drug plixorafenib. Fore Bio specializes in precision medicines for patients with genomically defined cancers – in this case, focusing on BRAF-mutated tumors.
This initial close of the D-2 round brings the total Series D funding to $113 million (including $75 M from prior D and D-1 tranches). The capital extension extends Fore’s cash runway beyond key clinical milestones expected in the second half of 2025, supporting ongoing Phase 2 trials of plixorafenib in multiple patient populations. The round drew participation from leading life sciences investors such as SR One, Medicxi, OrbiMed, HBM Healthcare, Wellington Management, Novartis Venture Fund, Cormorant, and 3B Future Health – reflecting strong optimism in Fore’s approach to tackling treatment-resistant cancers.
Funding Details:
-
Startup: Fore Biotherapeutics (Fore Bio)
-
Investors: SR One, Medicxi, OrbiMed, HBM Healthcare Investments, Wellington Management, Novartis Venture Fund, Cormorant Asset Management, 3B Future Health Fund
-
Amount Raised: $38 million
-
Total Raised: $113 million (Series D rounds aggregate)
-
Funding Stage: Series D-2
-
Funding Date: May 22, 2025
Roxom Global Raises $17.9 M Seed Funding for Bitcoin Exchange and Media Network
Roxom Global, a project aiming to “bring Bitcoin standards to global finance,” has raised a combined $17.9 million to build out two Bitcoin-focused ventures. The startup is developing a BTC-denominated securities exchange as well as RoxomTV, a 24/7 media network dedicated entirely to Bitcoin. In this unique seed funding, Roxom secured $7.9 million for its Bitcoin exchange from investors including Draper Associates, Borderless Capital, Ego Death Capital, and Kingsway Capital. It also raised an additional $10 million in a private round to launch RoxomTV. The company (led by CEO Borja Martel Seward) is assembling a Bitcoin treasury – currently holding ~84.7 BTC – to back its media platform, and plans to acquire more BTC in the coming weeks. With focus markets in Latin America, Europe, and Asia (and excluding the U.S.), Roxom will use the funds to advance its Bitcoin-native financial infrastructure and broadcast network, tapping into growing demand for Bitcoin-only services.
Funding Details:
-
Startup: Roxom Global
-
Investors: Draper Associates, Borderless Capital, Ego Death Capital, Kingsway Capital (exchange round); undisclosed investors (media round)
-
Amount Raised: $17.9 million (across two rounds)
-
Total Raised: $17.9 million
-
Funding Stage: Seed / Private Rounds
-
Funding Date: May 22, 2025
Butternut Box Fetches $100 M in Debt Financing for Fresh Pet Food Service
Butternut Box, a London-based fresh pet food delivery startup, has fetched over $100 million (approx. €75 M) in new financing to scale its operations across Europe. Unlike a traditional venture round, this funding comes as a non-dilutive debt raise from Liquidity Group, providing growth capital without equity dilution. Butternut Box plans to use the funds to open a second manufacturing facility in Poland and accelerate its mission of delivering healthy, human-grade meals to pets across the UK and EU. Founded in 2016, the company has become a leader in the fresh pet food segment, serving hundreds of thousands of dogs (and now cats) via a subscription model. The new financing reinforces Butternut’s march toward “unicorn” status as it continues expanding its production capacity and geographic reach in pursuit of happier, healthier pets.
Funding Details:
-
Startup: Butternut Box
-
Investors: Liquidity Group (venture debt provider)
-
Amount Raised: ~$100 million (€75 million)
-
Total Raised: Not disclosed (company has raised ~£380 million including equity and debt to date)
-
Funding Stage: Growth / Debt Financing
-
Funding Date: May 22, 2025
OroraTech Raises $42 M Series B Extension for Wildfire-Monitoring Satellites
OroraTech, a Munich, Germany-based wildfire intelligence startup, has extended its Series B round with an additional €12 million (~$13 million) investment, bringing the Series B total to €37 million (~$42 million). The extension, led by the BNP Paribas Solar Impulse Venture Fund with participation from Rabo Ventures and existing backers (Bayern Kapital, Edaphon, and ECBF), brings OroraTech’s cumulative funding to over €60 million (>$65 million).
OroraTech operates a constellation of thermal-sensing nanosatellites that detect wildfires in real time, enabling unprecedented early warning and risk assessment for wildfires worldwide. With ten satellites already in orbit and its AI-driven platform in use across multiple continents, OroraTech will leverage the new funds to scale its satellite fleet and wildfire forecasting technology. The goal is to help governments and industries mitigate the growing threat of wildfires with faster detection and actionable intelligence.
Funding Details:
-
Startup: OroraTech
-
Investors: BNP Paribas Solar Impulse Venture Fund (lead), Rabo Ventures, Bayern Kapital, Edaphon, European Circular Bioeconomy Fund
-
Amount Raised: $42 million (€37 million)
-
Total Raised: ~$68 million (over €60 million to date)
-
Funding Stage: Series B (extended)
-
Funding Date: May 22, 2025
Converge Raises $22 M Series A to Decarbonize Concrete with AI
Converge, a UK-based construction tech startup, has closed a $22 million round (the second tranche of its Series A) to scale its AI-powered concrete optimization platform. Converge develops smart sensors and an AI software suite that monitor concrete as it cures, providing real-time data on strength and temperature. This allows builders to use Concrete AI to choose more efficient mix designs and reduce the carbon footprint of construction projects by 20–40%.
The funding was led by ABN AMRO’s sustainable impact fund, with participation from Climate Investment (OGCI’s fund), Move Energy, Pi Impact, J-Impact, and existing investors Force Over Mass and TO Ventures. Converge will use the capital to deploy its sensors and AI platform across more construction sites globally, helping an inherently carbon-intensive industry embrace greener practices. The London-based startup’s technology is already in use on thousands of job sites, and this positions it to further scale its solution amid a broader climate-tech investment slowdown.
Funding Details:
-
Startup: Converge
-
Investors: ABN AMRO Sustainable Impact Fund (lead), OGCI Climate Investments, Move Energy, Pi Impact, J-Impact, Force Over Mass, TO Ventures
-
Amount Raised: $22 million
-
Total Raised: Not disclosed (Series A in two tranches)
-
Funding Stage: Series A
-
Funding Date: May 22, 2025
Funding Summary Table
| Startup | Investors (Lead & Notable) | Amount Raised | Total Raised | Funding Stage | Funding Date |
|---|---|---|---|---|---|
| Siro | SignalFire (lead); 01 Advisors; Saumil Mehta; Songe LaRon; etc. | $50 M | $75 M | Series B | May 22, 2025 |
| RevenueCat | Bain Capital Ventures (lead); Index Ventures; Y Combinator; others | $50 M | $100 M | Series C | May 22, 2025 |
| David AI | Alt Capital, Amplify Partners (co-leads); First Round; YC; BoxGroup | $25 M | ~$30 M | Series A | May 22, 2025 |
| Rhino FCP | AlleyCorp (lead); LionBird; Fusion Fund; Arkin; Qiming; Telus; etc. | $15 M | $30 M+ | Series A | May 22, 2025 |
| World (Worldcoin) | Andreessen Horowitz (lead); Bain Capital Crypto; Selini; Mirana; Arctic | $135 M | Not disclosed | Token Funding | May 22, 2025 |
| Fore Bio | SR One; Medicxi; OrbiMed; Wellington; Novartis VF; HBM; Cormorant; 3B | $38 M | $113 M | Series D-2 | May 22, 2025 |
| Roxom Global | Draper Associates; Borderless Capital; Ego Death; Kingsway | $17.9 M | $17.9 M | Seed / Private | May 22, 2025 |
| Butternut Box | Liquidity Group (venture debt) | ~$100 M | N/A (debt) | Debt Financing | May 22, 2025 |
| OroraTech | BNP Paribas Solar Impulse (lead); Rabo Ventures; Bayern Kapital; etc. | $42 M | ~$68 M | Series B (ext.) | May 22, 2025 |
| Converge | ABN AMRO (lead); OGCI/Climate Inv.; Move Energy; Pi Impact; etc. | $22 M | Not disclosed | Series A | May 22, 2025 |
🚀 Want Your Story Featured?
Get in front of thousands of founders, investors, PE firms, tech executives, decision makers, and tech readers by submitting your story to TechStartups.com.
Get Featured
