AI & Machine Learning Startups

Sift Lab provides analytics and personalization capabilities for ecommerce retailers and large retailers, using AI and segmentation to enable customer behavior prediction and omnichannel recommendations. The platform integrates with existing retail data infrastructure and marketing technology stacks while emphasizing low computational and storage costs.

1 investor

Sift is a fraud prevention platform that uses machine learning to distinguish legitimate customers from fraudsters in real time, drawing on a global data network of over a trillion annual events across hundreds of brands. It gives businesses visibility into payment fraud, account takeover, and account abuse, serving trust and safety teams at consumer-facing companies.

1 investor

Sifted provides software that automatically audits carrier invoices, monitors carrier pricing changes, and models shipping contracts to reduce parcel shipping costs. It serves shippers and brands across industries such as consumer goods, manufacturing, and retail managing high-volume parcel operations.

1 investor

Sifty applies machine learning to automate repetitive data processing tasks for customs brokers in international trade, reducing manual workload and time spent on pattern recognition across thousands of data points.

1 investor

Sigao Studios is a senior-led software consulting firm that embeds with mid-size SaaS companies' engineering teams to ship roadmap work using AI and rebuild their delivery processes so velocity gains persist after the engagement. It serves CTOs and VPs of Engineering at privately held or PE-owned SaaS companies with roughly 50 to 300 engineers across the US.

1 investor

Siggy offers clinician-supervised, always-on AI therapy that combines daily check-ins, medication management, and goal tracking, with licensed psychiatrists reviewing and prescribing non-controlled psychiatric medications. The service serves individuals seeking mental health care and is available to U.S. residents, rolling out state by state.

1 investor

Sightec develops visual autonomy software for unmanned aerial vehicles (drones) that enables reliable navigation and situational awareness in GPS-denied, urban, and contested environments using computer vision technology. The company serves UAV operators and mission-critical applications across thousands of operational sorties.

1 investor

Sigma provides automation software for IT teams to orchestrate patching, remediation, and operational workflows across hybrid infrastructure without requiring scripts or DevOps expertise. The platform is designed for enterprise IT environments where uptime, auditability, and controlled change are critical requirements.

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

SigmaMind AI provides a Voice AI platform for developers and enterprise teams to build and deploy AI agents that can execute actions across voice, chat, and email channels. The platform is used for customer support automation, sales follow-up, appointment booking, and other enterprise communication tasks.

1 investor

A Chinese high-tech company providing industrial vision inspection systems and cloud-based computer vision services for manufacturing enterprises. The company delivers end-to-end vision solutions including optical imaging design, algorithm customization, and production data integration to help manufacturers improve efficiency, reduce costs, and enhance product quality across industries including medical aesthetics, medical devices, pharmaceuticals, and consumer electronics.

1 investor

Sigmatic offers a platform that consolidates scattered operational and financial data for provider-owned healthcare facilities, such as ambulatory surgery centers (ASCs), to give a real-time view of operations, costs, and margins. It identifies cost leakage, staffing needs, and savings opportunities to help these centers improve profitability.

1 investor

Signalcore offers an evaluation system that helps enterprises decide whether to build, buy, extend, or stop AI initiatives by mapping workflows, gathering vendor evidence, comparing options against internal requirements, and defining what a proof-of-concept must prove. It serves enterprise technology teams making AI adoption decisions.

1 investor

SignalFisher (formerly Bug Bounty Switzerland) runs continuous, expert-validated security testing programs that combine an AI-powered network of vetted security researchers with human oversight to give organizations an up-to-date view of their cyber risk. It serves CISOs and security leaders at enterprises in regulated industries such as banking, finance, insurance, government, healthcare, utilities, and critical infrastructure.

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

SignalsHQ provides AI-based automation software for tax preparation firms, covering document intake, workpaper organization, data extraction, leadsheets, filing, and advisory. Its tools integrate with existing tax software such as Lacerte, UltraTax, CCH Axcess, ProConnect, ProSeries, and Drake to help scaling tax firms process returns with less manual work.

1 investor

SignalUp provides AI-powered full-service hardware product development, covering electrical and mechanical engineering, firmware, and manufacturing. It targets inventors and entrepreneurs who have hardware product ideas but little or no in-house engineering team.

1 investor

Signalyze offers an AI-native sales platform for complex, high-ticket sales teams, combining buyer data, structured workflows, and outcome learning to build targeting requirements and identify converting customers. It connects to CRMs like HubSpot, resolves customer identities, and refines lead targeting over successive runs.

1 investor

Signatrix uses computer vision and artificial intelligence to help brick-and-mortar retailers and supermarkets improve operational efficiency in the digital age. The company develops software tools designed to make retail businesses more efficient and future-proof.

1 investor

Signet Therapeutics develops targeted cancer drugs using cancer organoid models combined with artificial intelligence. The company focuses on discovering novel therapies for cancers that currently lack effective treatment options.

1 investor

Signit is a Saudi-built contract lifecycle management and digital signature platform that lets organizations draft, negotiate, sign, track, and renew contracts in one place, with an AI assistant trained on Saudi law. Licensed by the Digital Government Authority (DGA), it targets government bodies, enterprises, and startups in Saudi Arabia with locally hosted data and integrations with services like Absher, Nafath, and Wathq.

1 investor

Siksin operates a Korean restaurant discovery service offering restaurant recommendations, a restaurant map, food stories, and an AI-powered search tool that finds dining spots based on user needs such as group seating, parking, or amenities. The platform serves consumers looking for restaurants in South Korea.

1 investor

Sila provides AI tools designed to increase company productivity. The company works with large enterprises in private beta and is preparing a major product launch.

1 investor

Silah provides business process management services to help organizations optimize their operating models and improve organizational efficiency, productivity, and customer service delivery.

1 investor