Data & Infrastructure Startups

Sidian offers a software application that builds a unified data structure, or "company brain," around a company's data and connects to existing tools. It provides a structured, searchable memory so that institutional knowledge and precedent remain accessible to teams even after employees leave.

1 investor

Sievo provides spend analytics and carbon (CO2) management software for procurement teams, helping enterprises analyze spending data and calculate emissions in line with the Greenhouse Gas Protocol. The company serves global procurement organizations.

1 investor

Sifted provides a parcel spend management platform that connects to shippers' carrier accounts to normalize invoices, audit for billing errors, model shipping scenarios, and automate accounting tasks across multiple carriers. It serves shippers and third-party logistics (3PL) providers looking to reduce and manage parcel shipping costs.

1 investor

Siftree is an AI platform where users describe needs in plain language and long-horizon agents build data pipelines, structured datasets, custom tools, and cited insights from sources like calls, tickets, reviews, social media, documents, and video. It targets professional and enterprise teams looking to find, win, and keep customers, combining models (language, vision, audio, enrichment), governed storage, ingestion, and a marketplace of public data sources in one platform.

1 investor

Sigma Squared provides data-driven analysis for talent and hiring decisions, identifying performance and retention patterns specific to each organization. The platform integrates with existing HR systems to score candidates and internal promotions against organization-specific success profiles in real time.

1 investor

SignalRank is an investment vehicle that uses an algorithmic selection process to identify top-decile, venture-backed Series B companies and provides pro-rata follow-on financing through a network of existing investors. It offers accredited and qualified investors single-investment exposure to a diversified portfolio, structured as a Maryland C Corporation with a targeted direct listing as a closed-end fund.

1 investor

Foundry Spatial builds geospatial software and data solutions focused on water management, using data science and automation to collect and analyze environmental data for informed decision-making. It offers consulting and development services for geospatial projects, serving government and public-sector clients.

1 investor

Silencio AI operates a global network of contributors who record consent-cleared human voice data in over 1,000 languages and dialects across 180+ countries, offered as off-the-shelf datasets, on-demand custom collection, and transcription/labeling. It sells this multilingual voice data to AI labs and enterprises training voice agents, speech recognition, TTS, and translation models, with consent captured on-chain and contributors paid in stablecoin.

1 investor

Silver Sentinel develops an AI system that participates in phone calls to detect and block fraud attempts. The tool listens during a call and flags or intervenes when it identifies scam behavior, serving people who are targets of phone-based fraud.

1 investor

Silverchair provides software and services for scholarly publishers, including the Silverchair Platform for content management and the ScholarOne Manuscripts product for manuscript management. The company works directly with academic and research publishers to implement and maintain digital publishing infrastructure.

1 investor

Locus is a place-based analysis platform that integrates climate risk assessment, regional decarbonization planning, energy network analysis, and spatial planning tools for local authorities, utilities, and developers.

1 investor

SimicX operates an agentic research infrastructure platform that ingests global financial research, extracts tradeable hypotheses, and delivers audit-ready alpha candidates to hedge funds and asset managers. The platform autonomously identifies, validates, and backtests quantitative trading strategies across equities, FX, crypto, commodities, and macro markets.

1 investor

Simply Silicon builds bare metal inference compute by converting urban power capacity and connectivity into high-assurance data centres with private air-gapped fiber networks. It targets regulated and latency-sensitive customers such as banks, utilities, defence, government, and emergency services, as well as high-security AI workloads, with a flagship site in Calgary and a pipeline across North America and Europe.

1 investor

Simply.TV builds metadata and content discovery solutions for TV platforms, streaming services, and operators in the entertainment industry. The company serves media operators across Europe, Latin America, and North America with metadata to power content discovery at scale.

1 investor

Simporter runs AI-assisted innovation sprints that cluster consumer signals from reviews, search, and social into ranked demand spaces, then help teams generate, validate, and size product concepts. It is aimed at corporate innovation and R&D teams who need evidence to pass internal stage-gates and prioritize product launches.

1 investor

Simr provides a platform for running and managing high-fidelity engineering simulations, using automation (which it calls SimOps) to simplify traditional simulation workflows. It serves engineers working in product design and manufacturing.

1 investor

SineWave Ventures is a venture capital firm that invests in data, analytics, networking, cybersecurity, and computing technologies, with a focus on companies bridging commercial and public-sector (government, defense, and intelligence) markets. It backs early-stage companies developing AI/ML developer tooling, adaptive networks, zero-trust security, and high-performance computing.

1 investor

SingularityNET develops a decentralized artificial general intelligence platform designed to operate independently from any single entity, corporation, or country. The platform serves researchers, enterprises, and application developers across finance, robotics, biomedical, media, and entertainment sectors.

1 investor

Sipartech operates a fully owned optical fiber network offering high-capacity connectivity from 1 Gbps to 400 Gbps, with route diversity and bespoke network solutions. It provides 24/7 proactive monitoring and fault management for its enterprise connectivity customers.

1 investor

Siris Academic supports public, philanthropic, and socially-oriented organizations in improving their decision-making processes to create fairer and more responsible societies.

1 investor

Sitehunt provides a centralized property database that consolidates real estate site data from multiple sources and automatically enriches it with utilities, zoning, workforce, and environmental information. The platform enables site selection teams to organize, search, and validate property data with AI-guided workflows and integrated RFI preparation.

1 investor

Sixta builds software that automates the diagnosis and resolution of database incidents, combining large-scale metric analysis with the reasoning of a senior DBA. It serves database teams such as DBREs and SREs and the leaders who fund them.

1 investor

SkenarioLabs provides data infrastructure and asset-level intelligence for real estate finance institutions, quantifying climate risk, capital requirements, and future property valuations across European markets. The platform delivers continuous monitoring of flood, heat, subsidence, and regulatory risks translated into financial impact for portfolio decision-making.

1 investor

Skene builds a tool that protects the event-tracking and data collection layer for B2B SaaS companies, catching broken tracking on each release and recommending funnel improvements. It serves growth, revenue operations, and customer success teams that own activation measurement and funnel reporting.

1 investor