GreenBrain Science
GreenBrain Science (formerly Hiili) is a Leganés (Madrid), Spain-based digital carbon and energy data platform co-founded by Universidad Carlos III de Madrid researchers and media/advertising veterans, operating under its current brand since 2024.
About
GreenBrain Science (formerly Hiili) is a Leganés (Madrid), Spain-based digital carbon and energy data platform co-founded by Universidad Carlos III de Madrid researchers and media/advertising veterans, operating under its current brand since 2024. It measures, optimizes and reports the energy use and CO2 emissions of websites, apps, advertising and generative-AI usage; GreenBrain AI routes requests across 100+ LLMs to cut cost and emissions.
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Founders / team· 2
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This company
BusinessLatest roundTotal raisedDate- GreenBrain Science
GreenBrain Science (formerly Hiili) is a Leganés (Madrid), Spain-based digital carbon and energy data platform co-founded by Universidad Carlos III de Madrid researchers and media/advertising veterans, operating under its current brand since 2024. It measures, optimizes and reports the energy use and CO2 emissions of websites, apps, advertising and generative-AI usage; GreenBrain AI routes requests across 100+ LLMs to cut cost and emissions.
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United States
BusinessLatest roundTotal raisedDate- Mentic
Autonomous AI ad agent: from a client URL it runs market and competitor research, ad strategy, creative briefs, Meta ad optimization and reporting for SMBs lacking marketing teams or agency budgets, replacing agency labor with AI; supports Meta now, Google Ads and LinkedIn Ads in preparation.
— - PubMatic
Independent sell-side ad platform (SSP) for web, app and CTV/streaming publishers: real-time programmatic auctions (incl. header bidding), identity resolution (Identity Hub), yield optimization, and agentic AI ad delivery and automated optimization (Activate, AgenticOS), serving global publishers and ad buyers
$76M
$76M - Paramark
Predictive modeling to help marketing teams analyze and optimize ad spend
Seed · $6M · 2025-05
$6M
China
BusinessLatest roundTotal raisedDate- LeapMind Growth
AI-native growth technology services; flagship product GrowthGPT for ad strategy, creative iteration and cross-platform campaign optimization
Angel · 2026-05
— - Mogic
Cloud video creative collaboration platform using AI to break down footage, batch-generate ad creatives and attribute performance at the clip level
Series A · $15M · 2024-02
$15M
Europe
BusinessLatest roundTotal raisedDate- Olyzon
"Agentic" AI ad buying platform for CTV
Series A · $15M · 2026-05
$15M - Ramdam
Uses AI to help brands, agencies and mobile apps optimize every aspect of creator ad campaigns
Seed · $3M · 2024-10
$3M - Audion
AI to generate audio ads, target audiences and optimize digital audio ad performance
Series B · $23M · 2026-05
$23M
Other / unspecified
BusinessLatest roundTotal raisedDate- StackAdapt
Uses machine learning to analyze user behavior, predict optimal ad performance, and automate ad buying and placement across websites, video and connected TV
Undisclosed · $235M · 2025-02
$235M - Velocity
Ad monetization and growth infrastructure for AI apps, serving contextual ads in conversational AI interfaces based on real-time user intent.
Seed · $27M · 2026-07
$27M - Upscale
AI platform helping e-commerce brands run performance ads on streaming TV
Series A · $6M · 2025-05 · Valuation $55M
$6MValuation $55M
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