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Investors / United States / Andreessen Horowitz

Andreessen Horowitz

Venture capital · Menlo Park, CA, United States · North America

a16z.com

Andreessen Horowitz is a venture capital firm that invests in seed to venture to growth-stage technology companies. It operates a platform model with an in-house team of operators in areas such as marketing, talent, legal and policy to support founders.

Invests inAI & Machine LearningFintech

In its own wordsaibiohealthcareconsumercryptoenterprise

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841portfolio companies
814funding rounds on record518 led
214rounds, last 12 months
$20M to $100Mtypical round it comes in at
Seedmost frequent entry

Andreessen Horowitz lists 841 checked portfolio companies on its own site and is named in 814 funding rounds, 518 of them as lead. Its most frequent entry is Seed, 38% of the companies with a known first round. Its largest themes are AI & Machine Learning (22%), Fintech (16%) and Enterprise Software (11%). 86% of its companies are based in United States. It invests most often alongside Y Combinator, a16z Frontier and SV Angel.

Counts come from funding rounds that name Andreessen Horowitz, complete from mid-2025: earlier rounds appear only when they were reported later. Round amounts and full round histories are on Fundup AI.

Entry stage

share of companies by the stage of its first round
Show as a table
Share of companies by the stage of the firm's first round
Value
Pre-seed2%
Seed38%
Series A35%
Series B13%
Growth12%

Activity by year

rounds it joined, last 10 years
Show as a table
Funding rounds per year
TotalRounds it led
'17128
'181710
'192825
'202322
'219883
'228274
'236547
'248653
'2516971
'2618997

Investor profile

percentile among all firms
Portfolio size: 841 companiesRecent activity: 214 rounds in 12 monthsEarly stage: 40% of entries at pre-seed or seedEvidence: 46% of companies confirmed by a roundSector focus: 22% in its largest sectorReach: 32 countriesPortfolio size100th pctRecent activity100th pctEarly stage65th pctEvidence99th pctSector focus21th pctReach100th pct
This firmMedian of all firms
Show as a table
Andreessen Horowitz compared with all firms
MeasurePercentile of all firmsValue
Portfolio size100th841 companies
Recent activity100th214 rounds in 12 months
Early stage65th40% of entries at pre-seed or seed
Evidence99th46% of companies confirmed by a round
Sector focus21th22% in its largest sector
Reach100th32 countries

Investment themes

share of its checked companies
AI & Machine Learning 22%Fintechstated 16%Enterprise Softwarestated 11%Healthcare & Biotech 11%Cybersecurity 7%Media & Entertainment 5%E-commerce & Marketplaces 4%Gaming 3%

This firmAll checked companies

Show as a table
Investment themes
This firmAll checked companies
AI & Machine Learning22%18%
Fintech16%12%
Enterprise Software11%8%
Healthcare & Biotech11%15%
Cybersecurity7%4%
Media & Entertainment5%4%
E-commerce & Marketplaces4%6%
Gaming3%1%

Invests most often with

firms sharing its portfolio companies
Y Combinator 103a16z Frontier 98SV Angel 84General Catalyst 61Lightspeed Venture Partners 56Sequoia Capital 56Kleiner Perkins 42Founders Fund 39
Show as a table
Co-investors
Share
Y Combinator103
a16z Frontier98
SV Angel84
General Catalyst61
Lightspeed Venture Partners56
Sequoia Capital56
Kleiner Perkins42
Founders Fund39

All co-investors

Its portfolio companies

where they are based, and what their own sites show

Headquarters

Site status

  • Site answers80095%
  • No longer answers00%
  • Points to another company415%
  • Parked or sold domain00%

A site that stops answering three checks in a row is counted as no longer answering; that is not proof of closure. A site that points to another company is often an acquisition.

Co-investor network

who it backs companies with, and who they back together
84 shared companies60 shared companies50 shared companies49 shared companies49 shared companies49 shared companies44 shared companies43 shared companies41 shared companies41 shared companies36 shared companies34 shared companies33 shared companies33 shared companies30 shared companies30 shared companies29 shared companies28 shared companies28 shared companies23 shared companies23 shared companies22 shared companies21 shared companies20 shared companiesY Combinator: 103 shared companiesY Combinator103a16z Frontier: 98 shared companiesa16z Frontier98SV Angel: 84 shared companiesSV Angel84General Catalyst: 61 shared companiesGeneral Catalyst61Lightspeed Venture Partners: 56 shared companiesLightspeed Venture Pa…56Sequoia Capital: 56 shared companiesSequoia Capital56Kleiner Perkins: 42 shared companiesKleiner Perkins42Founders Fund: 39 shared companiesFounders Fund39Abstract: 36 shared companiesAbstract36NEA: 36 shared companiesNEA36Accel: 35 shared companiesAccel35Gil & Co: 33 shared companiesGil & Co33
Shared portfolio companies with Andreessen HorowitzFirms that also back companies together

All co-investors or Compare portfolios with Y Combinator

Compare Andreessen Horowitz head to head

portfolio size, rounds, entry stages, themes and the companies both back
vs Y Combinator103 shared companiesvs a16z Frontier98 shared companiesvs SV Angel84 shared companiesvs General Catalyst61 shared companiesvs Lightspeed Venture Partners56 shared companiesvs Sequoia Capital56 shared companies

Three or more firms at once: portfolio overlap.

Recent portfolio activity

when companies last raised with Andreessen Horowitz
DateCompanyStage
10 Nov 2026Zus Healthzushealth.comSeries B
6 Nov 2026OpenAIopenai.comSeries C+
4 Nov 2026Phazephaze.appSeed Led
2 Nov 2026Northwoodnorthwoodspace.ioSeries C+ Led
2 Nov 2026Tutor Intelligencetutorintelligence.comSeries B Led
2 Nov 2026Larridinlarridin.comSeries A
29 Oct 2026Wabiwabi.aiSeries B
29 Oct 2026Midstream Healthmidstream.healthSeries A

Round details for Andreessen Horowitz

Amounts, full round histories and every co-investor in Andreessen Horowitz's rounds are on Fundup AI. VCinfo covers investors and their portfolios.

See rounds on Fundup AI →

Portfolio

841 companies checked against their own sites
CompanyWhat it doesThemesFirst round with itEvidence
https://www.11x.ai/11x.ai · United StatesThe company provides AI agents for outbound, inbound, and expansion sales and marketing efforts
AI & Machine LearningEnterprise Software
Nov 2024Series BPage + round
Alpha-9 Oncologya9oncology.com · United StatesAlpha-9 Oncology is a clinical stage radiopharmaceutical company advancing a portfolio of molecules to treat cancer cells
Healthcare & Biotech
Portfolio page
Abridgeabridge.com · United StatesAbridge develops and provides generative AI for clinical conversations and documentation in healthcare.
Healthcare & BiotechAI & Machine Learning
Jun 2025Series A · 3 roundsPage + round
Accoladeaccolade.comAccolade provides personalized support, on-demand care, and benefits and health guidance to its members.
Healthcare & Biotech
Portfolio page
Actifioactifio.com · United StatesActifio provides enterprise class SaaS backup and disaster recovery for Google Cloud and hybrid workloads
Space & DefenseEnterprise Software
Portfolio page
Adaptiveadaptive.build · United StatesAdaptive provides construction accounting software that uses AI agents to automate financial operations
FintechConsumer
Jul 2022Seed · 2 roundsPage + round
Adaptive Securityadaptivesecurity.com · United StatesThe company provides cybersecurity solutions to protect against AI-powered attacks and deepfakes.
Cybersecurity
Dec 2025Series BPage + round
Addiaddi.com · ColombiaAddi provides a payment method that allows customers to buy now and pay later in installments without using credit cards or paperwork
FintechE-commerce & Marketplaces
Jun 2019Series APage + round
AdZen AIadzen.ai · United StatesAdZen AI creates conversational ads that engage people directly in the content they are interested in and drive measurable results across premium publishers, AI platforms and consumer-generated content.
AI & Machine LearningMedia & Entertainment
Feb 2026SeedFunding round
Aerodomeaerodome.com · United States
CybersecurityAI & Machine Learning
Oct 2023SeedPage + round
Cowboyaetherflux.com · United StatesCowboy Space Corporation builds a power grid in outer space for artificial intelligence using satellites and rockets
Space & DefenseAI & Machine Learning
Apr 2025Series AFunding round
Affirmaffirm.com · United StatesAffirm offers payment plans for shoppers to pay over time with no fees
Fintech
Portfolio page
Boldagebold.com · United StatesBold offers virtual access to doctors, personalized exercise and nutrition plans, and other services to support healthy aging for seniors
Healthcare & Biotech
Feb 2021SeedPage + round
airbase.usairbase.us · United StatesAirbase builds a unified software platform for spectrum licensing, coordination, and intelligence
CybersecurityAI & Machine Learning
Mar 2026SeedPage + round
Airbnbairbnb.comAirbnb provides holiday rentals and unique homes for travelers.
Real Estate & ConstructionLegal & Compliance
Portfolio page
AirGarageairgarage.com · United StatesAirGarage manages parking assets for property owners, providing data-driven insights and solutions to optimize operations and revenue
Real Estate & ConstructionMobility & Logistics
Oct 2021Series APage + round
airspace-intelligence.comairspace-intelligence.com · United States
AI & Machine LearningAI & Machine Learning
Dec 2023Series B · 2 roundsFunding round
Akasaakasa.com · United StatesAkasa builds AI for the hardest work in the revenue cycle, specifically for health systems to get full credit for the care they deliver.
Healthcare & Biotech
Nov 2025RoundPage + round
Akita Softwareakitasoftware.com
Portfolio page
Aktisaktisoncology.com · United StatesAktis Oncology develops targeted alpha-based radiopharmaceuticals for the treatment of cancer patients.
Healthcare & Biotech
Portfolio page

About this data

site last read 10 Nov 2026
The homepage of Andreessen Horowitz, as last read
a16z.com as VCinfo last read it
Site
a16z.com
Last read
10 Nov 2026
Watching since
6 Nov 2026
Rounds since
14 Oct 2009
Companies checked
841

Rates come from what VCinfo has observed since observation_start. Firms tend to remove companies that closed, so early rates understate reality. A company leaving a portfolio page does not mean it closed or exited. An unreachable site means our checks failed, nothing more.

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