| AllstacksB2B | B2B | Raleigh, United States | — | allstacks.com |
| AllswellHealthcare | Healthcare | San Francisco, United States | — | joinallswell.com |
| Alpha ExchangeFintech | Fintech | London, United Kingdom | — | alpha-exchange.com |
| AlpinB2B | B2B | Boulder, United States | — | alpin.io |
| Alt.FnB2B | B2B | New York City, United States | — | altfndata.com |
| AltruB2B | B2B | New York City, United States | — | altrulabs.com |
| AltScoreFintech | Fintech | Mexico City, Mexico | — | altscore.ai |
| altviaB2B | B2B | Broomfield, United States | — | altvia.com |
| AlyneB2B | B2B | Munich, Germany | — | alyne.com |
| AmbassadorOther | Other | Royal Oak, United States | — | getambassador.com |
| AmbeeB2B | B2B | Bengaluru, India | — | getambee.com |
| AmissaOther | Other | Charlotte, United States | — | amissa.com |
| AmpaireIndustrials | Industrials | Los Angeles, United States | — | ampaire.com |
| AmpdB2B | B2B | Seattle, United States | — | ampd.io |
| Amper MusicB2B | B2B | New York City, United States | — | ampermusic.com |
| AmplifAI HealthB2B | B2B | Abu Dhabi, United Arab Emirates | — | amplifaihealth.com |
| AMPLY DiscoveryOther | Other | Belfast, United Kingdom | — | amplydiscovery.com |
| Analog CraftOther | Other | Campbell, United States | — | analogcraft.ai |
| Analytical Flavor SystemsB2B | B2B | New York City, United States | — | gastrograph.com |
| Anam.aiOther | Other | London, United Kingdom | — | anam.ai |
| AND GlobalB2B | B2B | Ulaanbaatar, Mongolia | — | and.global |
| andMeConsumer | Consumer | London, United Kingdom | — | andmeapp.com |
| Ankra ABOther | Other | London, United Kingdom | — | ankra.io |
| AnswersNowHealthcare | Healthcare | Richmond, United States | — | getanswersnow.com |
| ANT61Other | Other | Eveleigh, Australia | — | ant61.com |
| AnthillB2B | B2B | Chicago, United States | — | anthillai.com |
| AnycartConsumer | Consumer | Mountain View, United States | — | anycart.com |
| AnytypeFintech | Fintech | Moscow, United States | — | anytype.io |
| Aplic PlatformEducation | Education | North Vancouver, Canada | — | aplic.io |
| App SamuraiOther | Other | San Francisco, United States | — | appsamurai.com |
| AppetasB2B | B2B | Redmond, United States | — | appetas.com |
| ApplicaB2B | B2B | Warsaw, Poland | — | applica.ai |
| AppliedVRHealthcare | Healthcare | Los Angeles, United States | — | appliedvr.io |
| Approve.comFintech | Fintech | Dover, United States | — | approve.com |
| AppsemblerEducation | Education | Cambridge, United States | — | appsembler.com |
| AppSheetOther | Other | Bellevue, United States | — | appsheet.com |
| ApptentiveConsumer | Consumer | Seattle, United States | — | apptentive.com |
| Aptos OrbitalB2B | B2B | Mountain View, United States | — | aptosorbital.com |
| AQUAOSO TechnologiesIndustrials | Industrials | Folsom, United States | — | agcor.io |
| Aquifer MotionB2B | B2B | Austin, United States | — | aquifermotion.com |
| AraIndustrials | Industrials | New York City, United States | — | arascreens.com |
| ArbiaIndustrials | Industrials | Vancouver, Canada | — | arbia.io |
| Arc SimulationsIndustrials | Industrials | London, United Kingdom | — | arcsim.io |
| Arch FinanceFintech | Fintech | Brooklyn, United States | — | archfinance.com.au |
| ArenaConsumer | Consumer | San Francisco, United States | — | arena.im |
| ArextechFintech | Fintech | Toronto, Canada | — | arex.technology |
| Ari CareOther | Other | Pärnu, Estonia | — | ari.shop |
| ArrivedFintech | Fintech | Seattle, United States | — | arrived.com |
| ArteraHealthcare | Healthcare | Santa Barbara, United States | — | artera.io |
| ArvistOther | Other | Wilmington, United States | — | arvist.ai |