SGNL
Continuous, context-aware access management enforcing the right enterprise access at the right time
Learn MoreThis is an early-stage fund, leveraging the audience of the Techmeme Ride Home podcast both for deal flow and for investment capital. Our LPs are the podcast audience. Many of our investments are coming from the audience as well.
Apply to investRide Home Fund was named to Signature Block's Emerging 50 list of up-and-coming funds.
I'm Brian McCullough. You might know me from such podcasts as the Techmeme Ride Home and the Internet History Podcast. I'm the cofounder of Ride Home Media. I wrote the book How the Internet Happened: From Netscape to the iPhone. I was an inaugural member of the TED Residency program in 2016. Before all that, I've been a serial founder including WhoToTalkTo.com and ResumeWriters.com, which was founded all the way back in 1999.
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Continuous, context-aware access management enforcing the right enterprise access at the right time
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Experimentation, evaluation, and observability tooling for teams building LLM-powered products
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Camera-free MEMS eye tracking for AR/VR headsets and smart glasses
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OpenTelemetry tracing plus generative AI to improve reliability of LLM systems
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Commercial real estate investment platform giving individuals access to institutional-grade private deals
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Native iOS design tool for designing, prototyping, and shipping mobile apps from your phone
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Buying and improving mission-critical vertical-market SaaS businesses across Europe into a profitable software conglomerate
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Forking WebKit to build a developer-centric web browser designed for the AI era
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AI agent for sales research and account intelligence; new product “Duet”
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Smart-ring controller — a new wearable category for operating devices hands-free, even through gloves
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Augmented-reality software bringing BIM overlays onto live construction and industrial work sites
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Collaborative onboarding plans that drive customer engagement and success
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Multimodal behavioral-health tracking that removes the guesswork from measuring mental-health treatment progress
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Platform for building and operating data-matching pipelines with enterprise-grade governance controls
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AI-native all-in-one operating platform for clinics, med-spas, and longevity and wellness practices.
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Uses AI and the human gut biome to predict and improve the efficacy of drugs
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AI that cuts non-actionable clinical alarms in ICUs, reducing alarm fatigue and patient risk
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AI summarization and workflow tooling for legal professionals handling complex case documents
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Turnkey data platform for audience management, insights, anomaly detection, and forecasting
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AI-powered organizational network analysis; people analytics built by former IBM researchers
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Generative AI producing life-like 3D models faster and cheaper than traditional pipelines
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Microchip serialization platform delivering low-cost die serialization for high-volume semiconductor manufacturing
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Next-generation foundation models with far lower inference cost, infinite context, and open-source weights
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Pools founders' common stock to diversify their outcomes and de-risk entrepreneurship
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LLM trained on product manuals and repair schematics; now D2C technician-maintenance tools
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Product-development platform connecting FAANG-caliber engineering teams with early-stage VC-backed startups
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Full-stack longitudinal biobank of blood samples powering applied AI for precision medicine
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At-home STI testing made easy, accessible, and affordable — a wedge into Gen Z healthcare
Learn MoreCarbon-compliance platform for inventorying, assessing, and disclosing Scope 3 environmental impact against ESG requirements
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State-of-the-art interpretability method that extracts what a model has learned from the model itself
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The leading open-source framework for building, testing, and deploying AI agents
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AI systems that extract, structure, and enrich complex unstructured data across documents and legacy systems
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Gig-economy delivery network — independent drivers using their own vehicles and spare storage space
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Behavior-deviation detection with real-time automated enforcement against the most common enterprise attack vectors
Learn MoreHelps employees assess, understand, and improve their mental wellness and cognitive performance
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AI support agents trained on your best reps — infinite memory, full conversations, any API
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VR platform for drug discovery, now building an OS for LLM-driven molecular design
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Building the operating system for product design
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Marketplace where world-class experts become scalable AI businesses and consumers access previously private knowledge
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Predicts the blast radius of infrastructure changes so enterprises can automate DevOps without fearing outages
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Tracks your contacts and everything they post online, so you know when something important happens
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Model-agnostic infrastructure for global AI expansion — tokenizers enabling accurate LLM fine-tuning in local languages
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Corporate re-skilling and continuing education; signaling verified knowledge and credibility across the internet
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Pivoted to Edge AI and AI Ops; originally consumer data privacy and access management
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Rentable pre-training supercomputer cutting the cost of training a model from millions to thousands
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Next-generation haptic touch technology, deployed in high-end Microsoft Surface hardware and other OEM devices
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Modular emergency-response boxes for overdose and bleeding incidents, putting naloxone and tourniquets where they're needed
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3D design tool for creating scenes, editing materials, and modeling objects for the web
Learn MoreAI performance-marketing agent running paid social, search, and SEO in place of media buyers
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Application security testing built for developers — shifting security left, before code ships to production
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Research-driven pharmatech using machine learning and targeted assays to identify next-generation mental wellness medicines
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Developer-friendly machine learning platform for building custom models and deploying real-time prediction APIs in minutes
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AI game-creation platform letting anyone generate, play, and publish original games
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NIL platform for collegiate athletes to engage fans and monetize their name, image, likeness
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Curated marketplace of tools that supercharge AI application development
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Asset treasury and licensing pipeline for building-scale programmable 3D models — “Stripe for 3D buildings”
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AI-native knowledge retention layer for legacy codebases, starting with the COBOL systems running critical infrastructure
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Foundation model for chemical manufacturing — predicting temperature, concentration, and catalyst parameters for drug synthesis
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Enterprise-scale orchestration and observability for composable frontends, from the creators of Module Federation
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