Latest United States Startup Funding Rounds

Startup funding in United States: recent rounds, the companies behind them and their participating investors.

This page showsCountry: United States
Rounds
313
Sep 10 – Oct 9, 2026
Disclosed funding
$28B
244 disclosed amounts
Median round
$23M
Of disclosed amounts
313 rounds
Funding rounds
CompanyAmountRoundSectorCountryInvestorsAnnounced
ViabotRobotics · United StatesCompany profile

Autonomous robots that sweep commercial properties, empty their own debris and return to a dock for charging.

Autonomous robots that sweep commercial properties, empty their own debris and return to a dock for charging.

$24MSeries ARoboticsUnited StatesInvestors
RidgelineFintech · United StatesCompany profile

Cloud software for investment managers that brings trading, portfolio accounting, compliance and client reporting into one system.

Cloud software for investment managers that brings trading, portfolio accounting, compliance and client reporting into one system.

$250MSeries ESeries C+FintechUnited StatesInvestors
Arcee AIAI · United StatesCompany profile

Open-weight language models and deployment tools that let organizations adapt and run AI on infrastructure they control.

Open-weight language models and deployment tools that let organizations adapt and run AI on infrastructure they control.

≥$150MSeries BAIUnited StatesInvestors
Luzern RiskFintech · United StatesCompany profile

A captive-insurance manager and technology platform that helps businesses form, operate and monitor insurance companies they own.

A captive-insurance manager and technology platform that helps businesses form, operate and monitor insurance companies they own.

$45MSeries BFintechUnited StatesInvestors
AntflyDeveloper tools · United StatesCompany profile

A retrieval database that combines keyword, vector and graph search so developers can ground AI applications and agents in their own data.

A retrieval database that combines keyword, vector and graph search so developers can ground AI applications and agents in their own data.

$2MPre-SeedPre-seedDeveloper toolsUnited StatesInvestors
KastleAI · United StatesCompany profile

AI agents for banks and lenders that automate routine lending and loan-servicing work across existing systems.

AI agents for banks and lenders that automate routine lending and loan-servicing work across existing systems.

$24MSeries AAIUnited StatesInvestors
CrusoeAI · United StatesCompany profile

AI infrastructure combining GPU cloud services, managed AI tools, large-scale data centers and modular AI factories for model developers and enterprises.

AI infrastructure combining GPU cloud services, managed AI tools, large-scale data centers and modular AI factories for model developers and enterprises.

$3.9BSeries F (initial close; anticipated total)Series C+AIUnited StatesInvestors
MainstayProptech · United StatesCompany profile

An AI-powered real estate operations platform that gives residential property owners a unified record and automates ownership workflows.

An AI-powered real estate operations platform that gives residential property owners a unified record and automates ownership workflows.

>$18MFundingUndisclosedProptechUnited StatesInvestors
PolyphronBiotech · United StatesCompany profile

An AI-guided tissue-engineering platform that grows human micro-tissues and models their responses to support drug research and development.

An AI-guided tissue-engineering platform that grows human micro-tissues and models their responses to support drug research and development.

$20MSeedBiotechUnited StatesInvestors
R3 LithiumClimate tech · United StatesCompany profile

A battery-recycling and refining company that turns recovered battery materials into lithium carbonate for battery manufacturers.

A battery-recycling and refining company that turns recovered battery materials into lithium carbonate for battery manufacturers.

$15MSeries AClimate techUnited StatesInvestors

Active investors in this selection

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Ranked by rounds participated in · From Sep 10, 2026

  1. 1
    Andreessen Horowitz (a16z)

    TypeSafe AI, Arena, Vesta

    25rounds
    12led
  2. 2
    Y Combinator (YC)

    Nous Research, Santé, Vitalize

    18rounds
    0led
  3. 3
    Khosla Ventures

    Arena, Vinci, Conway Research

    14rounds
    3led
  4. 4
    Sequoia Capital

    TypeSafe AI, Mecka, Healthleap

    12rounds
    4led
  5. 5
    Insight Partners

    Stuut, Hestus, Inc., Quartermaster

    12rounds
    9led

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