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.

5,201 companies

Directory
Company	Category	Region	Sources	Links
OpenReplayOpen-source, self-hosted, session replay tool for developers.	OtherUses AI	New York City, NY, USA; Paris, Île-de-France, France	Docs	Open homepage
OpenSeaThis isn't just a marketplace; we're shaping the future of digital…	OtherUses AI	New York City, NY, USA; Remote	Docs	Open homepage
OpenSEOOpen source alternative to Semrush and Ahrefs	OtherUses AI	Boston, MA, USA	Docs	Open homepage
OpenWorkThe open source alternative to Claude Cowork	OtherUses AI	San Francisco, CA, USA	Docs	Open homepage
OpenWrenchWe help retailers and restaurant chains manage repairs and…	OtherUses AI	San Francisco, CA, USA	Docs	Open homepage
OperandDue diligence and value-creation tools using quantitative methods and AI for private equity firms.	OtherUses AI	San Francisco, CA, USA	Docs	Open homepage
OpheliaMedication & support to beat opioid addiction from home	OtherUses AI	New York City, NY, USA; New York, NY, USA	Docs	Open homepage
Orange SliceAgentic sales enrichment spreadsheet	OtherUses AI	San Francisco, CA, USA	Docs	Open homepage
Orbital OperationsHigh Thrust Space Vehicles for Satellite Defense	OtherUses AI	Los Angeles, CA, USA	Docs	Open homepage
OrcaBanking for Gen Z, on steroids.	OtherUses AI	San Francisco, CA, USA; Austin, TX, USA	Docs	Open homepage
OrgOrgOrganizational productivity suite for companies	OtherUses AI	San Francisco, CA, USA; Remote	Docs	Open homepage
OrigamiEnter your domain & Origami gets you customers.	OtherUses AI	San Francisco, CA, USA	Docs	Open homepage
Origami RoboticsManipulate Anything Robot	OtherUses AI	San Francisco, CA, USA	Docs	Open homepage
Origami Therapeutics, Inc.Oral drugs to halt neurodegeneration	OtherUses AI	San Diego, CA, USA	Docs	Open homepage
OrthogonalAgentic Payments for APIs	OtherUses AI	San Francisco, CA, USA	Docs	Open homepage
OsmindPlatform for breakthrough mental health research and treatment	OtherUses AI	San Francisco, CA, USA	Docs	Open homepage
OuterportDesign automation for industrial electrical controls	OtherUses AI	San Francisco, CA, USA	Docs	Open homepage
OutschoolA live online learning platform that empowers kids ages 3–18.	OtherUses AI	San Francisco, CA, USA; Remote	Docs	Open homepage
OwnLocalOwnLocal automates marketing for over 129,000 SMBs through 3,300…	OtherUses AI	Austin, TX, USA	Docs	Open homepage
OxygenA leading digital bank in the US offering personal and business…	OtherUses AI	San Francisco, CA, USA; Los Angeles, CA, USA; Remote	Docs	Open homepage
PadletPapyrus → Parchment → Paper → Padlet	OtherUses AI	San Francisco, CA, USA	Docs	Open homepage
Pair TeamBuilding the safety net of the future	OtherUses AI	San Francisco, CA, USA; Remote	Docs	Open homepage
PanaA Global Bank on Chain	OtherUses AI	Miami, FL, USA; Remote	Docs	Open homepage
PangolinOpen networking and security for your workforce, AI agents, and infra	OtherUses AI	New York City, NY, 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.