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Logo	Name	Short description	Category	Region	Founders	Sources	Jobs	Exit	Stage
	Silentium Open homepage		AI infra	Israel		Docs Gigasheet	Open jobs
	Silico Data Open homepage	Our mission is to rethink how medicine is made	Vertical	San Jose, California, United States		Docs	Open jobs
	Silimate Open homepage		Vertical	San Francisco, CA, USA		Docs
	SilkChart Open homepage	SilkChart analyzes sales calls and measures how well playbooks are executed. It proactively surfaces coaching opportunities to managers, and provides reps with actionable feedback to drive better conversations with clients and increase close rates.	Vertical	San Francisco, CA, USA; Remote		Docs
	Silogy Open homepage	Develop Chips Faster with Viv, an AI agent for digital design verification	Vertical	New York City, NY, USA; Remote		Docs
	Silora R&D Open homepage		AI infra	Israel		Docs Gigasheet
	Siltech Network Solutions Open homepage		AI infra	Israel		Docs Gigasheet	Open jobs
	Silurian Open homepage		Energy	Seattle, WA, USA		Docs	Open jobs
	silverback.ai Open homepage		Vertical	Israel		Docs Gigasheet
	Silverlining Cloud Security Open homepage		AI infra	Israel		Docs Gigasheet
	Sim Open homepage		Agents	San Francisco, CA, USA		Docs	Open jobs
	Simbie AI Open homepage	Simbie AI’s clinically-trained voice agents act as your 24/7 AI medical receptionist—handling scheduling, refills & intake with 60% cost savings. Loved by doctors & patients.	Vertical	New York City, NY, USA		Docs
	SimCare Open homepage	AI Client simulations for better counselor training. Speak directly with avatars to practice counseling skills, explore different scenarios, and get instant feedback.	Vertical	New York City, NY, USA		Docs
	SimicX Open homepage	Browse hundreds of research-grounded trading alphas distilled from recent quantitative finance research. Filter by cross-section vs time-series, frequency, method, and asset class.	AI infra	Brentford, England, United Kingdom		Docs
	Simlat Uas Training & Simulation Open homepage		Robotics	Israel		Docs Gigasheet	Open jobs
	Simone Veil Research Centre for Contemporary European Studies, Ben-Gurion University of the Negev Open homepage		Vertical	Israel		Docs Gigasheet
	Simple AI Open homepage		Vertical	San Francisco, CA, USA		Docs
	Simple Idea Ltd - Product Design & Development. Open homepage		Other	Israel		Docs Gigasheet
	Simplebu Open homepage		Other	Israel		Docs Gigasheet
	simplestoolbar.com Open homepage		Other	Israel		Docs Gigasheet	Open jobs
	Simplex Open homepage		Agents	San Francisco, CA, USA		Docs	Open jobs
	Simplex Digital Hotel Marketing Ltd. Open homepage		Other	Israel		Docs Gigasheet	Open jobs
	Simplex Mapping Solutions Ltd Open homepage		Other	Israel		Docs Gigasheet
	simplex.com Open homepage		Other	Israel		Docs Gigasheet	Open jobs

Staff list a company after a homepage 200 and one to three sources. Map pins use a sourced city or region — near that place or at the region centroid. Unknown location stays list-only. Founders, exit, and jobs stay omitted unless sourced. Founder photos stay omitted unless a sourced URL is listed — we never invent a face. We do not invent people, a street address, or size, price, or growth figures.