Morning VC Brief丨2026.04.15

Week16 Highlights丨Fluidstack, Bluefish, Neato, Mastra, Rork, Juno, Seifert Dynamics

Author

eric gu
April 15, 2026

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Table of Contents

01. Venture News

1/ AI Data Centers Fluidstack in talks for $1B at $18B

  • Product: Specialized AI data centers; signed $50B deal with Anthropic to build custom facilities in Texas and New York

  • Highlight: Valuation more than doubled from $7.5B to $18B in months; Customers: Anthropic, Meta, Poolside, Black Forest Labs, Mistral

  • Investors: Jane Street (Lead, in talks)

  • Source

2/ Agentic Marketing Startup Bluefish raised $43M Series B

  • Product: Agentic Marketing Platform for Fortune 500 brands; controls how AI tools portray products (ChatGPT, Google AI, Claude, Perplexity); monitors, activates, and measures AI-driven brand presence

  • Highlight: ~10% of Fortune 500 engaged; customers include Adidas, American Express, Hearst, LVMH, Ulta Beauty; millions of AI prompts processed daily

  • Investor: Threshold Ventures, NEA

  • Source

3/ 2P eCommerce Platform for Consumer Brands Neato raised $25M

  • Product: Neato acts as the sole online retailer for consumer brands — buying inventory directly, then handling advertising, logistics, brand protection, and analytics end-to-end across marketplaces

  • Highlight: Ranked #39 on Inc. 5000 fastest-growing companies in 2022; surpassed nine-figure total revenue; operates in 10 countries; top-500 Amazon storefront

  • Investor: Advantage Capital (Lead)

  • Source

4/ AI-Powered Commodity Risk Management Platform Pillar raised $20M Seed

  • Product: Pillar automates hedging for commodity-driven businesses (metals, food, airlines), using AI to ingest data from contracts, ERP systems, and cash flows — then autonomously building, managing, and rebalancing hedge portfolios in real time

  • Highlights: Turns hedging from a static, periodic process into a continuous autonomous system; targets underserved SMEs with institutional-grade risk tools

  • Investors: a16z (Lead), Crucible Capital, Gallery Ventures

  • Source

5/ TypeScript AI Agent Development Framework Mastra raised $22M Series A

  • Product: Mastra is an open-source TypeScript framework for building AI agents and workflows, offering an all-in-one platform including cloud deployment (Mastra Server), observability tools (Mastra Studio), and a Memory Gateway for any agent framework.

  • Highlights: 23k GitHub Stars; enterprise clients include Brex, Indeed, Marsh McLennan (100k+ daily enterprise search users), MongoDB, Workday, and Salesforce

  • Investors: Spark Capital (Lead)

  • Source

6/ AI-Powered Mobile App Builder Rork raised $15M Seed

  • Product: Rork is an AI platform that turns plain-language prompts into fully functional iOS and Android native apps (Swift, React Native, Expo), allowing anyone to build and publish to the App Store and Google Play without coding.

  • Highlights: Top 2 in App Store "Developer Tools" category worldwide; #1 referring website to RevenueCat; launched Rork Max (powered by Claude Opus 4.6) generating 8M+ views on X and doubling ARR within two weeks

  • Investors: Left Lane Capital (Lead), Peak XV, True Ventures, Goodwater, a16z Speedrun

  • Source

7/ AI Tax Preparation Automation Platform Juno raised $12M Seed

  • Product: Juno is an AI-powered tax prep platform built for small and medium-sized accounting firms, automating ~90% of data entry across 90+ document types with source-to-return traceability, automated error detection, and a human-in-the-loop review workflow

  • Highlights: Nearly 500 accounting firms onboarded within the first year; reached mid-seven-figure ARR within its first 8 months

  • Investors: Bonfire Ventures (Lead), Impression Ventures, Xfund

  • Source

8/ Intelligence Platform for Critical Infrastructure Seifert Dynamics raised $3.3M Seed

  • Product: Seifert Dynamics builds private operational software that synthesizes distributed real-time data to deliver structured situational awareness and decision-making support for defense, logistics, energy, and critical infrastructure sectors.

  • Highlights: Founded in March 2024; targets mission-critical, defense-adjacent markets where downtime and fragmented data carry severe consequences

  • Investors: Insight Partners (Lead), Palantir Technologies, Shield Capital

  • Source