Startups

Startups worth watching

Companies in any sector. A Uses AI tag appears when the listing records that the company uses AI.

Listed after a verified homepage and sources. No invented size or price.

13,040 companies

Directory
Company	Category	Region	Status	Sources	Links
SignalsiMessage revenue channel for DTC brands that brings customers back	OtherUses AI	San Francisco, CA, USA		Docs	Open homepage
SigNozOpen source alternative to DataDog	OtherUses AI	San Francisco, CA, USA; Remote		Docs	Open homepage
SilicaActuators for Physical AI	RoboticsUses AI	San Francisco, CA, USA		Docs	Open homepage
SilmarilSecurity for agents that self-improves	OtherUses AI	San Francisco, CA, USA		Docs	Open homepage
SimplyInsuredWe sell health insurance to small businesses 100% online.	OtherUses AI	San Francisco, CA, USA		Docs	Open homepage
SimulithicUser simulations for production monitoring.	VerticalUses AI	San Francisco, CA, USA		Docs	Open homepage
SINAIEnterprise software to quantify cost-effective decarbonization…	EnergyUses AI	San Francisco, CA, USA		Docs	Open homepage
SingleStoreThe cloud-native, operational database built for speed and scale.	OtherUses AI	San Francisco, CA, USA	40 open	Docs	Open homepage
SingularityBuilding and Protecting an Exciting Future	OtherUses AI	Los Angeles, CA, USA	19 open	Docs	Open homepage
Sinovia TechnologiesFlexible printed OLED displays.	OtherUses AI	San Francisco, CA, USA; San Carlos, CA, USA		Docs	Open homepage
SinterAccelerating scaled plastics with additive technologies	OtherUses AI	El Segundo, CA, USA		Docs	Open homepage
SiPhox HealthAt-Home health monitoring with silicon photonic chips for data centers	OtherUses AI	Boston, MA, USA		Docs	Open homepage
SitennaCompound B2B SaaS for modern infrastructure to deploy and manage sites	OtherUses AI	Atlanta, GA, USA; Remote		Docs	Open homepage
SkyscrapeSkyscrape makes temperature-responsive insulation	OtherUses AI	Portland, OR, USA		Docs	Open homepage
SlashBanking, corporate cards, stablecoin payments – available globally.	OtherUses AI	San Francisco, CA, USA		Docs	Open homepage
SlashyCursor for Email	AgentsUses AI	San Francisco, CA, USA		Docs	Open homepage
Sleep ResetOne clinic for every sleep issue	OtherUses AI	San Francisco, CA, USA; Remote		Docs	Open homepage
SmartAssetMarketplace connecting consumers to financial advisors	OtherUses AI	Austin, TX, USA; Remote		Docs	Open homepage
SmartcutsChrome extension to turn clicks & keystrokes into no-code automations	OtherUses AI	New York City, NY, USA; New York, NY, USA; Remote		Docs	Open homepage
SmartPathFinancial wellness for the middle class	OtherUses AI	Atlanta, GA, USA; Remote		Docs	Open homepage
SmobiSend texts your customers actually want over RCS	OtherUses AI	New York City, NY, USA		Docs	Open homepage
smol machinesShip software faster with portable, self contained virtual machines.	OtherUses AI	San Francisco, CA, USA		Docs	Open homepage
SnackpassOrder ahead at restaurants and get rewards with friends.	OtherUses AI	San Francisco, CA, USA		Docs	Open homepage
Snapdocsdigital mortgage closing	OtherUses AI	Portland, OR, USA; San Francisco, CA, USA		Docs	Open homepage

Staff list a company once its homepage loads and one to three sources back it up. 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.