--- url: 'https://qubit.capital/blog/us-seed-weekly-funding-roundup-week-4-april-2026-2' title: 'US Seed Weekly Funding Roundup (Apr 21-28, 2026): $144.5M Raised Across 6 Deals' author: name: Mayur Toshniwal url: 'https://qubit.capital/blog/author/mayur' date: '2026-04-28T07:13:36+05:30' modified: '2026-04-28T11:21:17+05:30' type: post summary: 'US seed startups raised $144.5M across 6 deals this week, led by Sooth Labs ($50M) and NeoCognition ($40M). AI dominates with 5 of 6 rounds.' categories: - Weekly Funding Roundup image: 'https://qubit.capital/wp-content/uploads/2026/04/featured-us-seed-66347.webp' published: true --- # US Seed Weekly Funding Roundup (Apr 21-28, 2026): $144.5M Raised Across 6 Deals US seed-stage startups closed $144.5M across six deals this week, with AI-focused companies pulling in five of the six rounds. The biggest checks went to Sooth Labs ($50M from Felicis) and NeoCognition ($40M), both emerging from stealth with academic and frontier-lab pedigree. Healthcare, defense, fintech, and industrial AI rounded out the slate. The seed market keeps moving up-market in the US. Average round size hit $24M, well above traditional seed benchmarks. That tracks with the broader week: US Series A deals brought in $109M across four companies, and Series B+ rounds totaled $475M across six. Capital is concentrating at every stage, and seed is no exception when the founding team has lab credentials or a clear vertical wedge. Weekly Funding Roundup APR 21-28, 2026 $144M TOTAL RAISED 6DEALS CLOSED 100%SEED $24.1MAVG DEAL SIZE USTOP REGION BY STAGE Seed$144M100% BY SECTOR Sooth LabsAI / enterprise$50M NeoCognitionAI / foundation models$40M HumbleAI / industrial$24M CoralHealthtech$12.5M BlackstarAI / defense$12M Balerion AIFintech / AI$6M Table of Contents - [1. Sooth Labs Raises $50M For Enterprise AI Verification](#1-sooth-labs-raises-$50m-for-enterprise-ai-verification) [Deal Overview](#deal-overview) - [Investor Profile](#investor-profile) - [Company and Leadership](#company-and-leadership) - [Problem and Opportunity](#problem-and-opportunity) - [Product and Technology](#product-and-technology) - [Use of Proceeds and Vision](#use-of-proceeds-and-vision) - [Market Context](#market-context) - [2. NeoCognition Emerges From Stealth With $40M For Brain-Inspired AI](#2-neocognition-emerges-from-stealth-with-$40m-for-brain-inspired-ai) [Deal Overview](#deal-overview-1) - [Investor Profile](#investor-profile-1) - [Company and Leadership](#company-and-leadership-1) - [Problem and Opportunity](#problem-and-opportunity-1) - [Product and Technology](#product-and-technology-1) - [Use of Proceeds and Vision](#use-of-proceeds-and-vision-1) - [Market Context](#market-context-1) - [3. Humble Raises $24M For Industrial AI Agents](#3-humble-raises-$24m-for-industrial-ai-agents) [Deal Overview](#deal-overview-2) - [Investor Profile](#investor-profile-2) - [Company and Leadership](#company-and-leadership-2) - [Problem and Opportunity](#problem-and-opportunity-2) - [Product and Technology](#product-and-technology-2) - [Use of Proceeds and Vision](#use-of-proceeds-and-vision-2) - [Market Context](#market-context-2) - [4. Coral Raises $12.5M For Healthcare Automation](#4-coral-raises-$12-5m-for-healthcare-automation) [Deal Overview](#deal-overview-3) - [Investor Profile](#investor-profile-3) - [Company and Leadership](#company-and-leadership-3) - [Problem and Opportunity](#problem-and-opportunity-3) - [Product and Technology](#product-and-technology-3) - [Use of Proceeds and Vision](#use-of-proceeds-and-vision-3) - [Market Context](#market-context-3) - [5. Blackstar Raises $12M For Defense AI](#5-blackstar-raises-$12m-for-defense-ai) [Deal Overview](#deal-overview-4) - [Investor Profile](#investor-profile-4) - [Company and Leadership](#company-and-leadership-4) - [Problem and Opportunity](#problem-and-opportunity-4) - [Product and Technology](#product-and-technology-4) - [Use of Proceeds and Vision](#use-of-proceeds-and-vision-4) - [Market Context](#market-context-4) - [6. Balerion AI Raises $6M For Mortgage Origination](#6-balerion-ai-raises-$6m-for-mortgage-origination) [Deal Overview](#deal-overview-5) - [Investor Profile](#investor-profile-5) - [Company and Leadership](#company-and-leadership-5) - [Problem and Opportunity](#problem-and-opportunity-5) - [Product and Technology](#product-and-technology-5) - [Use of Proceeds and Vision](#use-of-proceeds-and-vision-5) - [Market Context](#market-context-5) - [Lessons For Founders](#lessons-for-founders) ## 1. Sooth Labs Raises $50M For Enterprise AI Verification ### Deal Overview - Stage: Seed - Sector: AI / enterprise - Geography: United States - Round size: $50M - Lead investor: Felicis ### Investor Profile Felicis led the round. The firm has backed Anduril, Adyen, and Notion at early stages and has been writing larger seed checks into AI infrastructure plays. A $50M seed from a single lead signals high conviction in the team’s research IP. ### Company and Leadership [Sooth Labs](https://soothlabs.ai) emerged from stealth in April 2026. The founding team is made up of ex-frontier-lab researchers and applied-AI engineers. Full team disclosure is limited, but the Felicis check size suggests recognizable names from the major labs. ### Problem and Opportunity Hallucinations remain the biggest blocker for enterprise AI deployments in legal, finance, and research. Buyers want auditable outputs, not confident guesses. Sooth Labs is targeting that exact gap. ### Product and Technology The company is building AI agents focused on truthfulness and evidence-grounded reasoning. The stack combines retrieval indices, structured evidence graphs, and fine-tuned reasoning models so every claim can be traced to a source. The moat is curated evidence corpora and research IP rather than raw model scale. ### Use of Proceeds and Vision Capital goes to research and engineering hiring, training and inference infrastructure, enterprise integrations, and the first commercial product. The pitch is that any LLM application should be able to call Sooth as a trust layer before output reaches the user. ### Market Context The enterprise AI agent market is projected past $50B by 2030. Sooth is competing with Anthropic’s citation features, Perplexity Enterprise, Glean, Hebbia, and Vectara. Verification is becoming its own category. ## 2. NeoCognition Emerges From Stealth With $40M For Brain-Inspired AI ### Deal Overview - Stage: Seed - Sector: AI / foundation models - Geography: California, United States - Round size: $40M - Investors: Undisclosed ### Investor Profile The investor syndicate hasn’t been disclosed at announcement. The size of the round and the academic-founder profile point to top-tier deep-tech funds. ### Company and Leadership [NeoCognition](https://neocognition.ai) was founded by a tenured computer science professor in California. The team came out of stealth in April 2026 with $40M committed. ### Problem and Opportunity Transformer scaling is hitting compute and energy walls. Training runs cost hundreds of millions, and inference economics are squeezing margins across the industry. Buyers want capable models that don’t require trillion-parameter clusters. ### Product and Technology NeoCognition is building neuromorphic, brain-inspired learning architectures aimed at sample efficiency and energy efficiency. Research focus areas include continual learning, reasoning, and memory. The IP comes directly from the founder’s academic lab. ### Use of Proceeds and Vision Funds go to compute, research hires, and building reference models at scale to validate the architectural claims. Early enterprise pilots are on the roadmap once the science holds up. ### Market Context The efficient-AI segment includes Liquid AI, Sakana AI, Extropic, and Rain AI. The broader foundation-model market is projected past $1T by 2030. Efficiency is a real wedge given current GPU and energy constraints. ## 3. Humble Raises $24M For Industrial AI Agents ### Deal Overview - Stage: Seed - Sector: AI / industrial - Geography: United States - Round size: $24M - Lead investor: Eclipse Ventures ### Investor Profile Eclipse Ventures led. The firm focuses on digitizing the physical economy and has backed Bright Machines, Atomic Industries, and other industrial-tech companies. Humble fits the thesis cleanly. ### Company and Leadership [Humble](https://humble.ai) closed its $24M seed on April 21, 2026. Founders are former applied-AI and robotics engineers. ### Problem and Opportunity Manufacturing, construction, and field operations have been left behind by the SaaS wave. The blue-collar economy still runs on paper, radios, and tribal knowledge. AI copilots can finally move into these workflows now that vision and reasoning models are good enough. ### Product and Technology Humble is building AI agents and copilots for industrial workflows, combining vision, sensor data, and LLM reasoning. The data advantage comes from operational deployments and integrations with shop-floor systems. ### Use of Proceeds and Vision Capital funds engineering hires, customer pilots, and production deployments that generate proprietary training data from real operational sites. ### Market Context The global industrial-AI market is projected past $150B by 2030. Competitors include Bright Machines, Covariant, Cresta, and Tulip Interfaces. ## 4. Coral Raises $12.5M For Healthcare Automation ### Deal Overview - Stage: Seed - Sector: Healthtech - Geography: United States - Round size: $12.5M - Lead investor: Lightspeed (with Z47) ### Investor Profile Lightspeed led with participation from Z47 (formerly Matrix Partners India). Lightspeed has been active in healthtech automation, and Z47 brings cross-border operating depth. ### Company and Leadership [Coral](https://coral.health) was founded in 2024 by ex-healthcare and AI operators. The April 2026 round closed at $12.5M. ### Problem and Opportunity US healthcare admin spend is roughly $1T per year. Provider groups are short-staffed and drowning in prior auths, claims, and intake paperwork. AI agents can take this work off humans. ### Product and Technology Coral applies AI agents to admin workflows including prior auth, claims, intake, scheduling, and revenue cycle. The platform integrates with EHRs and runs on HIPAA-compliant infrastructure. Workflow-specific training data on payer rules is the long-term moat. ### Use of Proceeds and Vision Funds go to engineering and clinical-ops hires, EHR integrations, and scaling pilots into multi-site deployments. ### Market Context AI back-office is the hottest healthtech category right now. Competitors include Notable Health, Anterior, Cohere Health, Infinitus, and Commure. ## 5. Blackstar Raises $12M For Defense AI ### Deal Overview - Stage: Seed - Sector: AI / defense - Geography: United States - Round size: $12M - Lead investor: Abstract Ventures ### Investor Profile Abstract Ventures led the round. The firm has been building exposure to defense and dual-use AI as the category has heated up post-2024. ### Company and Leadership [Blackstar](https://blackstar.ai) raised $12M in April 2026. Founders are stealth-mode operators with backgrounds in defense and dual-use AI. ### Problem and Opportunity The DoD has accelerated AI software procurement, and intelligence agencies need faster ways to fuse and analyze sensor and signal data. Cleared engineering talent is scarce, which is itself a moat. ### Product and Technology Blackstar is building AI agents for defense and national-security workflows, likely intel fusion, ISR analysis, or autonomous-systems software. The data advantage runs through cleared talent, government relationships, and mission-relevant training data. ### Use of Proceeds and Vision Capital funds government pilots, security-cleared hiring, infrastructure for classified workloads, and product development. ### Market Context The US DoD AI and software budget is roughly $1.8B in FY26 and growing. Blackstar is positioning in the Anduril, Shield AI, and Helsing tier. Other competitors include Vannevar Labs and Scale AI’s defense arm. ## 6. Balerion AI Raises $6M For Mortgage Origination ### Deal Overview - Stage: Seed - Sector: Fintech / AI - Geography: United States - Round size: $6M - Lead investor: Kleiner Perkins ### Investor Profile Kleiner Perkins led. The firm has been writing seed checks into vertical AI agent companies, and mortgage is a category with clear cost-to-produce pain. ### Company and Leadership [Balerion AI](https://balerion.ai) closed its $6M seed in April 2026. Founders are ex-mortgage-tech and AI-engineering operators. ### Problem and Opportunity US mortgage origination is a $2T per year market with cost-to-produce above $10K per loan. Cycles run 30 to 45 days and are full of repetitive document and verification work. Agentic AI is a clean fit. ### Product and Technology The platform automates document collection, income and asset verification, underwriting checks, condition clearing, and borrower communication. Domain-specific agents are trained on mortgage-document corpora, with integrations into LOS systems like Encompass and Blend. ### Use of Proceeds and Vision Funds support engineering hires, lender pilots, LOS integrations, and SOC2 and compliance infrastructure. The vision is an AI loan officer that handles everything between application and clear-to-close. ### Market Context Competitors include Rocket Logic, Tavant, Blend’s AI, Stavvy, Stable, and Capacity. The category is real but crowded, and execution speed will decide winners. ## Lessons For Founders - Vertical AI agents are getting funded at seed when they target a specific high-cost workflow. Mortgage, healthcare admin, and industrial ops all closed checks this week. - Founder pedigree from frontier labs or top universities is unlocking $40M+ seed rounds. If you have that signal, raise like Series A. - Verification, grounding, and trust are emerging as their own category. Hallucination is the most consistent enterprise objection, and that’s now an investable wedge. - Defense AI keeps attracting capital. Cleared engineering talent and government relationships function as a real moat. - Efficiency-first model architectures are getting funded as a hedge against transformer scaling costs. The bet is that compute economics force a rethink.