Venture Capital

Andreessen Horowitz

Andreessen Horowitz (a16z) is a Silicon Valley venture capital firm founded in July 2009 by Marc Andreessen and Ben Horowitz and headquartered in Menlo Park, California. The firm invests across the full lifecycle from seed to venture to growth-stage technology companies, deploying stage-based checks that range from roughly $1M-$5M into early application bets up to hundreds of millions of dollars into its largest AI positions. a16z organizes around dedicated practice areas: AI, American Dynamism, Bio + Healthcare, Consumer, Crypto, Enterprise, Fintech, Games, Infrastructure, plus specialty vehicles including the Cultural Leadership Fund, Perennial, and the Speedrun accelerator. With over $90B-$100B+ in assets under management as of early 2026 and a public portfolio of more than 1,000 companies, a16z is one of the largest and most influential venture firms in the world, known for its operator-led platform model and notable investments including Airbnb, Coinbase, GitHub, Figma, Stripe, Databricks, Anduril, and OpenAI.

1100 portfolio companies 1097 publish APIs here 15 properties
Venture CapitalSeedSeries AGrowth EquityArtificial IntelligenceCryptoFintechEnterpriseInfrastructureDeveloper ToolsAmerican DynamismSilicon ValleyNorth America
The a16z API Portfolio cover
API Evangelist Portfolio Report
The a16z API Portfolio

Every Andreessen Horowitz company that ships an API, scored the way a machine reads it — and what the book says about the fund's real bet.

Read the report $750.00 · every API-bearing company in the book, scored on the Kin Score
Portfolio Strength across 1084 profiled portfolio companies on the network
60 top-rated API companies 16 exemplar · 44 strong
117 agent-ready companies 14 agent-native · 103 agent-ready
Average quality of the book:
Composite emerging 19.4
Agent-Readiness human-only 8.5

Firms are ranked by cumulative portfolio strength — how many highly-rated API companies they've backed, weighted by tier across composite quality and agent-readiness. The averages below are a secondary read on the typical company in the book.

Andreessen Horowitz has 1,100 portfolio companies tracked on the APIs.io network, of which 1,097 (100%) publish APIs indexed here.

Its highest-rated API providers on the network are Stripe, Svix, OpenAI, Mux, Ghost.

Portfolio on the Network

Portfolio companies that publish APIs indexed on APIs.io, grouped by their API Evangelist rating. Exemplar and Strong are expanded by default.

Exemplar 16 Complete, well-documented, and agent-ready
Strong 44 Solid coverage with minor gaps
Developing 121 Usable, with meaningful gaps to close
Nash1 API54.0Mistral AI13 APIs53.9Neon Commerce10 APIs53.9Lighter1 API53.8Yuno1 API53.3NationBuilder1 API53.2Payrails1 API53.0Wefunder1 API53.0Parsec1 API52.4Repl.it1 API51.9Halliday1 API51.8Avalanche2 APIs51.7DoorDash5 APIs51.7Lumos1 API51.7Thatch Health1 API51.7Dynamic1 API51.6Pinecone6 APIs51.6Basis1 API51.4Merit Systems2 APIs51.4Biodock1 API51.2Vantage2 APIs51.2OpenSea1 API51.0Onshape1 API50.8Orderful1 API50.7Uthana2 APIs50.7Hex1 API50.5Mintlify1 API50.5Nym Technologies2 APIs50.5Clever2 APIs50.4Rainforest QA1 API49.7Kodex2 APIs49.6Sprig1 API49.6Hedra1 API49.4Reflektive1 API49.4Zencoder1 API48.8Tanium3 APIs48.7Trunk1 API48.6Snaplogic1 API48.4Devoted Health3 APIs48.3Equals1 API48.0Prosper AI1 API48.0Workboard2 APIs48.0Dyno2 APIs47.9ClearSlide2 APIs47.7Mattermark2 APIs47.7Uniswap2 APIs47.4Flock Safety1 API47.3Lightup1 API46.8Clerk1 API46.6Matik1 API46.6Optimism1 API46.5Runway1 API46.5SpotOn15 APIs46.4Pimlico2 APIs46.3Aghanim1 API46.2Convex3 APIs46.2Arweave1 API46.1Arpeggi Labs1 API46.0Limitless2 APIs45.8Weld1 API45.4Bitski2 APIs45.1Charthop1 API45.1Linq.gg1 API45.0Robinhood1 API44.9Envoy3 APIs44.7Coinbase5 APIs44.6Datanomik2 APIs44.6Airbnb2 APIs44.5Anchorage2 APIs44.5Pinterest1 API44.5June1 API44.4Quora1 API44.4Lido Finance3 APIs44.3Aloft1 API44.1Rasa2 APIs44.1Delphix2 APIs44.0Doppel1 API44.0Navan1 API44.0Syndicate1 API44.0Blackbird1 API43.9Foursquare1 API43.7Reddit2 APIs43.4Socket1 API43.4Border01 API43.2Unravel Data Systems1 API43.2Forta1 API43.1k-ID1 API43.0Mysten Labs3 APIs43.0CoinSwitch1 API42.9Aleo1 API42.6CCP Games1 API42.6ModernFi1 API42.5Promptfoo6 APIs42.3Engflow1 API42.1Glio1 API42.1Orbit1 API42.1RapidAPI6 APIs42.0Submittable1 API41.9Skydio1 API41.8Valon41.7Labelbox2 APIs41.4Replay1 API41.4Z League1 API41.4Facebook21 APIs41.0Cuenca1 API40.9Hopin1 API40.7Canal1 API40.6Sequence7 APIs40.6Smartcar1 API40.6Eco1 API40.5Kaedim1 API40.4Diaspora1 API40.3Fudo1 API40.3Mem1 API40.2GoodData1 API39.9Komodo Health1 API39.8Stack Machine1 API39.8Voidpet2 APIs39.8Seismic Systems1 API39.6Heap2 APIs39.5Rutter1 API39.4
Thin 148 Limited public surface area
Forward Networks1 API39.2Golden Recursion1 API39.1Preset1 API39.1HumanAPI2 APIs39.0Stack Overflow2 APIs39.0Imply1 API38.9Alation4 APIs38.8Kong1 API38.8XMTP7 APIs38.8Nx38.7PagerDuty1 API38.7Alloy Automation1 API38.5Stacker1 API38.4Affirm5 APIs38.3HealthSherpa1 API38.2Lever41 APIs38.2Blend Labs1 API38.0Julep Beauty5 APIs37.7Rivet1 API37.7Rigetti & Co1 API37.6Roblox8 APIs37.5MatterPort1 API37.4Coactive AI1 API37.3Ampersand1 API37.2Apptio1 API37.1Fivetran1 API37.0IDRx1 API36.9Genius9 APIs36.6Manifold1 API36.6NewsBlur1 API36.6Synapse1 API36.6Apollo15 APIs36.5Luma AI1 API36.5Gusto1 API36.3Netography1 API36.3Matter Labs1 API36.2Metronome1 API36.2Otter27 APIs36.1Starburst1 API36.0Substack3 APIs36.0Ready Player Me3 APIs35.8Truffle Security35.8xAI1 API35.8Clockwork Labs1 API35.7Espresso1 API35.7Fly.io9 APIs35.6ClickUp12 APIs35.3Mercury1 API35.3Wise1 API35.3EigenLayer7 APIs35.2Estimote1 API35.2overshoot.ai2 APIs35.1Patch2 APIs35.1Science Exchange23 APIs35.1Dispatch2 APIs35.0Sky Mavis3 APIs35.0Harvey1 API34.4Ex-Human1 API34.3Harbor1 API34.1Black Forest Labs1 API33.9Loot Rush Games1 API33.9Proof of Play1 API33.9Everlaw1 API33.8Morpho Labs1 API33.8Golden1 API33.7Ideogram1 API33.7Isovalent2 APIs33.7ElevenLabs11 APIs33.6CodeCombat1 API33.5Beacons.ai1 API33.3Labster33.3Gamma.app1 API33.1Here Not There Labs1 API33.1Stainless1 API33.1UXPin33.1Apptimize1 API33.0Lime1 API33.0Sardine1 API32.9Hilbert's AI1 API32.8Tally1 API32.6Rescale2 APIs32.5Upstash1 API32.5Loom5 APIs32.4Screenleap1 API32.4Carry1st1 API32.1PlanetScale1 API32.1Samsara1 API32.1Parsable1 API32.0SignalFx1 API31.9Pixlee3 APIs31.7Shapeways1 API31.7Tenfold1 API31.7Lyft2 APIs31.3Dialpad1 API31.1Foundation2 APIs31.1Comma.ai1 API31.0LayerZero4 APIs31.0Alchemy12 APIs30.9Sourcegraph10 APIs30.9Loop Crypto1 API30.6Zentail1 API30.5Adaptive Security1 API30.4Pyn30.3SpaceX1 API30.3Worldcoin6 APIs30.3Plai Labs1 API30.2Bastion1 API30.1Cask12 APIs30.1Cresta1 API30.1Gamebeast1 API29.7Maven2 APIs29.4Boosted1 API29.3Angle2 APIs28.9Celo1 API28.9Story Protocol1 API28.9Macro1 API28.7OpenGov21 APIs28.7Tindie1 API28.7TruckSmarter1 API28.7ActionIQ2 APIs28.6Granular1 API28.6Illumio1 API28.6Jumio14 APIs28.3Medium2 APIs28.3Merkle Manufactory Inc.1 API28.2Nansen1 API28.1Series AI1 API28.1Chia1 API28.0Reforge1 API28.0Neighbor1 API27.8Lookout1 API27.7Leap Motion2 APIs27.5Etleap1 API27.4Iron Fish1 API27.4Sleeper1 API27.4Abacus3 APIs27.3Valora1 API27.1Snapser27.0Anduril1 API26.9Anyscale10 APIs26.9Addi1 API26.8Function Health1 API26.8Alluxio1 API26.7Clutch1 API26.7Opendoor1 API26.7Census1 API26.5AnyRoad26.3Mythical Games1 API26.3
Emerging 228 Early or largely undocumented
Signifyd8 APIs26.1Striking.ly1 API26.1Tecton1 API26.1Moment1 API25.9NEAR4 APIs25.9The Promenade1 API25.9Akita Software2 APIs25.8Carta5 APIs25.8Superhuman25.8IYK1 API25.4IFTTT1 API25.2Levels Health1 API25.2Odyssey1 API25.2Datapad25.1HVMN1 API25.1Oasis Labs1 API25.1SentiLink2 APIs25.1Tapi1 API25.0Tlon Corporation1 API25.0Per Vices24.9BreederDAO1 API24.3Panorama Education24.1Skype2 APIs24.1Zefchain1 API23.9Aztec23.6Wit.AI1 API23.6Phantom10 APIs23.4Infinite Athlete1 API23.2RLY Network23.2Matternet1 API23.0Rive22.9500px1 API22.7BitClout1 API22.7Talos22.7Lassie22.4Motherduck1 API22.3Soylent1 API22.3Black Ore Technologies22.2Vals AI22.2Zenefits1 API22.2Gensyn1 API22.1Keybase1 API22.1Zumper1 API22.1App.net1 API22.0DFINITY1 API22.0dYdX1 API21.9Decagon1 API21.7Element21.7Branch1 API21.6Tugboat Yards1 API21.5Logseq21.4Overwolf1 API21.4Hebbia2 APIs21.0Wrapbook21.0Omada Health20.8Firstbase20.5Swiftype1 API20.5Elegen20.4Magic Leap20.1Ringly20.1Ambience1 API20.0Runscope1 API20.0Flow19.9PicFinder1 API19.7Mainframe1 API19.6CYGNVS19.5Ambient.ai19.4Daylight1 API19.4Cape19.3Stilta1 API19.3CircuitHub19.0BuildZoom1 API18.9Oculus VR18.6Adaptive18.5Ventrilo18.5TipTop1 API18.3Pave18.2Ethos1 API18.1Double Robotics2 APIs18.0Faraway1 API18.0Supermove1 API18.0Co:Create1 API17.9OptimizerAI1 API17.8Zulily2 APIs17.8Compound1 API17.6Greenlight17.6Jeeves17.5Product Hunt1 API17.5Headway17.4Spruce17.4Firefly17.2Flexport1 API17.2Rezo17.2Entropy17.1Material Security17.1UnitedMasters17.1Fortuna Health16.9Boku1 API16.8Media Chain16.8Nova Labs16.7Shoptiques1 API16.7HireArt16.6Tomorrow Health16.2Pietra16.1Stoik16.1Workrise16.0People.ai15.8Pindrop Security15.8Primodium Inc.15.8GetGoing15.7Wonderschool15.7Braid Social15.6Cross River Bank8 APIs15.6Mirror1 API15.6Regression Games15.6Trass Games1 API15.6Ulysses15.5Gobble15.4Trust Token15.4Whatifi15.4Atlys15.1Forte15.1Incredible Health15.0Propel15.0Sprinter Health15.0Dreamforge14.9GoTenna14.9Shield AI1 API14.9Flightfox14.8Keep Financial14.8Crux14.7Regrello14.7Wiz1 API14.6Domo1 API14.5Harpoon14.5Arc14.4CircuitLab14.4Orchid Labs14.4Listia14.3Waymo14.3Bold14.2Eve14.2hyperexponential14.2Locale14.2OpenEvidence14.2Zibra AI14.2Gigster14.0Hipcamp14.0PartyDAO14.0Fab.com13.9Teespring13.9Parallel Universe13.6SolveBio1 API13.6Walker & Co.13.6Saronic13.58Tracks1 API13.4Goldbely13.4Brightside13.3DoNotPay13.3Filmhub13.3Highstock13.3Intro13.3Premise13.3Titan13.3Applied Intuition13.1Doctor on Demand13.1Fidocure13.1Pomelo Care13.1Tennr13.1Asserts.ai13.0Command Zero13.0Earnin13.0Hippocratic AI13.0Virool12.9Asseta12.8Cantina AI12.8Glyf12.8Shef12.8Start Playing12.7Warbler Labs Incorporated12.7Zuma12.7Medmonk12.6Q Bio12.6TopKey12.6Inductive Bio12.4Loft12.4Nitra12.4OneHealthCompany12.4Autograph12.3NeuralMagic12.2Udacity12.2Vastrm12.2Actifio12.1One Month12.1Juniper Behavior Health12.0Prepared12.0Character.AI11.9Improbable11.9Mayvenn11.9PROOF11.9BuzzFeed11.8Earn.com11.8EarnBetter11.8Flock Homes11.8Loftia11.8Ray Browser11.8Season11.8The Atavist11.8BloomNation11.7Earnest11.7Asimov11.5Current1 API11.5Tellus11.5Bounce11.4Eclypsium11.4FlyHomes11.4Lil Snack11.4Tenex AI11.4Accolade11.3Grouper11.3KoBold Metals11.3Sound.xyz11.3Medley11.1Alta VR11.0Authy11.0FundersClub11.0Kindred11.0Rabbit11.0
Minimal 527 Almost no public developer surface
Hadrian10.8Maker10.8Nautilus Biotechnology10.8RethinkDB1 API10.8Telepatia AI10.8Waymark10.8Prisms VR10.7Apeel10.6BeReal10.6California Forever10.6Convey10.6Diem10.6Keychain Logisitics10.6Odyssey Interactive10.6OfferUp10.6Oncorps10.6Rosebud AI10.6Sandbox VR10.6Setpoint.io10.6SmartAsset10.6Super Evil Megacorp10.6Toka10.6Voldex10.6Cadre10.5Experiment10.5Freenome10.5Talkiatry10.5AirGarage10.4Belong10.4Keep Network10.3Capitolis10.2Clubhouse10.2Divvy Homes10.2Essence Ventures10.2favorited10.2Gym Class VR10.2Kailera Therapeutics10.2KIKI10.2MeetMe10.2Overtime10.2Royal10.2Skout10.2Tessera Labs10.2videogame.ai10.2Live Aware Labs10.1Aktis Oncology10.0Curie.Bio10.0Milu Health10.0Prophetic10.0Quantifind9.8Valar Labs9.8Azra Games9.7Castelion9.7Kaizen Labs9.7Shibuya9.7Axoni9.6Dare Drop9.6Exowatt9.6Heron Power9.6Tradeblock9.6Vesta9.6AminoChain9.5Betterleap9.5Cedar9.5Erasca9.5Pearl Health9.5Slingshot AI9.4Upsmith9.4MightyHive9.3Thyme Care9.3AlmostApps9.2Closing Theory Studios9.2Dishpatch9.2E-3 Tech9.2Everyrealm9.2Flavrs9.2Reface9.2Relay.app9.2Roboto Games9.2Santa Ana Bio9.2Skysafe9.2SuperGaming9.2Yuga Labs9.2Incite Interactive9.1Payall9.1Tomo Guides9.1Astranis9.0insitro9.0Ollin Bio9.0Cyngn8.9Flowcarbon8.9Petual8.9Udio8.8Latitud8.7Whatnot1 API8.7E-Pal8.6NG.Cash8.6Puddle8.4Yield Guide Games8.4Anzen8.2Intrinsic1 API8.2Study Edge8.2Universal8.2Point8.1Bayesian Health7.9LTSE7.9Memora7.9Formation Bio7.7AKASA7.6Alpine Bio7.6Inventa7.6Meitre1 API7.6Northwood Space7.6Octant Bio7.6Raid Base7.6Scribe Therapeutics7.6Tilt7.6A Capital7.4Irreverent Labs7.4Open Souls7.4mth Sense7.3Town7.3Barefoot Networks7.2BlocPower7.2Createra7.2Cumulus Networks7.2Codi7.1Digg7.1Distributional7.1Drill Creative7.1Foodology7.1Fractal7.1Meta4 Capital7.1Rollup AI1 API7.1Scoutzie7.1The Coterie7.1Vaas7.1Tigris7.0Matchday6.9Factual6.8Floobits6.8Interana6.8SigOpt6.8451 Degrees6.7Crater Studios6.7Earli6.7Easel6.7Glorify6.7Silo6.7Unleashed Games6.7Protocol Labs6.6Tractive6.6Ventus Tx6.5Astro Mechanica6.4BioAge Labs6.4Bump6.4GOAT6.4Inceptive6.4LE TOTE6.4Safe Superintelligence6.4Singularity66.4Synonym6.4Tsumobi6.4Atrium6.3Chestnut6.3Braveheart6.2Cartography Biosciences6.2Mana.bio6.2Elsewhere6.1First Day Entertainment6.1Orchestra Bio6.1Percolata6.1Blockspring6.0CreatorDAO6.0Cryptoys6.0Daze6.0Metatheory6.0Theorycraft Games6.0Viki6.0Snackpass5.9Camp45.8Zynga5.8AMP Fund5.7Aviate5.7Binary Thumbs5.7Butter Systems5.7Casetext5.7Distelli5.7Level Headed Games5.7ToutApp5.7TXN Solutions5.7Usermind5.7Adim5.5Allset5.5Elodie5.5Kavak5.5Noodle Labs5.5Rappi1 API5.5Altera5.3bash.gg5.3BrainTripping5.3Caffeine5.3Canto Reality Inc.5.3CoreOS5.3dejavu5.3ElasticBox5.3Fei Protocol5.3GGFolks5.3Hackpad5.3Kitchit5.3Lawdingo5.3Micro5.3Omni Creator Products5.3OpenBazaar5.3Optimyze5.3Pahdo Labs5.3Tabular5.3Urban Engines5.3Tally Labs5.2Teleport1 API5.142Floors5.099Dresses5.0Aerodome5.0AeroFS5.0AgLocal5.0Airware5.0All Day Kitchens5.0All Def Digital5.0Alongside5.0Amiato5.0Apex Space5.0Apropose5.0Arimo5.0Ark.com5.0Artillery Games5.0Automatic Labs5.0Battlebound5.0BBA5.0Bebop5.0Believer5.0BigScreen5.0Bitcasa5.0BitYota5.0BlockTower Capital5.0BloomThat5.0Bluebox5.0Bonfire Studios5.0Bop.fm5.0Bracket Computing5.0Braid5.0Bromium5.0Bufferbox5.0Canopy Labs5.0Canvas Networks5.0Capriza5.0Carbonated5.0Casai5.0Caviar5.0Cazena5.0Chute5.0Cider5.0CipherCloud5.0Clearstory Data5.0Clementine5.0Coho Data5.0Concept5.0Core Loop5.0Crowdery5.0CrowdMob5.0Cult of the North5.0D2iQ5.0Data Elite Services5.0DataGravity5.0DCB Technologies5.0DeepMap5.0DogVacay5.0Dollar Shave Club5.0Drishti Technologies5.0Drone Capital I5.0Eka Robotics5.0Enjoy Technologies5.0Fanhouse5.0FiftyThree5.0First Person Labs5.0FlightCar5.0Flutter5.0Friends with Benefits5.0Fusion I/O5.0Future Nostalgia Studios5.0Getable5.0Glow5.0Graft Concepts5.0Gridsnap5.0HomeJoy5.0HUM Industries5.0Instart Logic5.0Jerpix5.0Jopwell5.0Kamcord5.0Kippt5.0Layer by Layer5.0LeanMarket5.0Legend Labs5.0Legion Studios5.0LendUp Global5.0Lowkey5.0Luma Home5.0Lytmus5.0Lytro5.0Magic Circle Studio5.0MediaSpike5.0Medigram5.0Mem Protocol5.0Mind Robotics5.0Morta Security5.0Mosaic Building Group5.0Mountaintop.gg5.0Natero5.0Neon Wild5.0Nicira Networks5.0NOD Games5.0OpenInvest5.0Parhelion Studio Co.5.0Patch Biosciences5.0PeerStreet5.0PiCloud5.0Pixate5.0Platfora5.0PleasrDAO5.0Post.news5.0Prism Skylabs5.0Prologue5.0Quago Technologies LTD5.0Quirky5.0Radiant Entertainment5.0Rascal Games5.0Resourcely5.0Rockmelt5.0RTFKT5.0Sandhill Markets5.0SCiFi Foods5.0Screenhero5.0SeedFi5.0ShoeDazzle5.0Silver Tail5.0Sisu Data5.0Skypunk5.0Socialcam5.0Soha Systems5.0SpoonRocket5.0Statwing5.0StyleSaint5.0Symbio Robotics5.0Syntertainment5.0Talaria Technologies5.0Talko5.0Talkray5.0Tandem5.0Tapsense5.0Tasty Labs5.0The Rounds5.0ThirdLove5.0Thread5.0Tidemark5.0Tomfoolery5.0Tracksby5.0Twice5.0uBEAM5.0VacayHero5.0Wave5.0Weft5.0WeMash5.0Wevorce5.0Windwalk Games5.0Within5.0Zed.run5.0ZeroMark5.0VeeFriends4.7Doxel4.6Marley Medical4.6PatientPing4.6Knowmia.com4.3Talofa Games4.3Amber4.1BigHat Biosciences4.1Mino Monsters4.1Namo Media4.1Queenly4.1Scene Infrastructure Company4.1Shift.org4.1Starstock4.1Threadflip4.1Tipgain4.1Trustable4.1Web Van 2.04.1Zipline International4.1DeepCell3.8Gate Bioscience3.8Marker Learning3.8Knowable3.6Rome Therapeutics3.6Anki3.4Arda Therapeutics3.3Aria Pharmaceuticals3.3Cardiogram3.3Chariot Defense3.3Ciitizen3.3EQRx3.3Genesis Therapeutics3.3Healthy Labs3.3Honor3.3Human DX3.3Maze Therapeutics3.3Openbay3.3Patina3.3Vicinitas Therapeutics3.327Bards3.2Automaton3.2Collections Labs3.2Common Sense Machines3.2Earn Holdings3.2Galxyz3.2Go-Scale3.2Greply3.2Hackermeter3.2HEAT3.2Helix3.2Hiptype3.2Hyperink3.2iCracked3.2imgfave3.2Infer3.2IronSpread3.2ItsOn3.2Journera3.2Karyo Studios3.2Kosen Labs3.2Local Motion3.2LocalOn3.2Luma Interactive3.2LVL63.2Lyrebird.ai3.2Magnet Beauty3.2Marft3.2Massive Health3.2Merit3.2MicroEval3.2Midnox3.2Milkshake Labs3.2New Preact3.2NewJPhone3.2NewNew3.2Nouvou3.2Nuzzel3.2Paloma3.2PatternEQ3.2PayTango3.2Plutus Labs3.2Polywork3.2Proven3.2RC Chirp3.2Red Hot Labs3.2Rewatch3.2Rival Labs3.2Run The World3.2Scanly3.2Shield Bio3.2ShortCircuit3.2Siduma3.2Simpler3.2SnapBite3.2Social Nation3.2SolidStage3.2Sourcery Technologies3.2Standard Treasury3.2Stelo3.2Teleborder3.2TellFi3.2Testcode3.2The Possible Company3.2TinyCo3.2Tmunity3.2TopProspect3.2Torbie3.2uBiome3.2UnifyID3.2Viacycle3.2Visan3.2Wholeshare3.2Wireover Co.3.2WizzyWig3.2XBuild3.2Yard Club3.2YCVC W143.2Yellow3.2ZeFrank Company3.2Groupon2.9Buildspace2.5Socratic2.5Function Oncology2.2Jungla2.2Orbital Therapeutics2.2Pine Medical2.2Tome Bioscience2.2Topography2.2Weilos2.2Airbrite1.9Quantopian1.6Dream Voyage Inc.1.5Erebor Bank1.5Fanatics Holdings1.5True Link Financial1.5AltSchool0.9Apcera0.9Health IQ0.9KNO0.9LearnSprout0.9Make School0.9Tiny Comet0.9Capital.xyz0.7Gainspeed0.6Hatch Loyalty0.5Maza0.3Balanced0.1Clinkle0.1Clover Networks0.1Practice0.1
Unrated 13 Not yet scored

Rest of Portfolio

3 further portfolio companies that don’t yet have a provider page on the network.

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Cohort brief

Auto-generated

The 1084 portfolio companies with APIs in the catalog, backed by Andreessen Horowitz, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
1084
of 1097 on the roster
Mean Kin Score
19.2
-1.5 vs catalog 20.7
Mean Agent Readiness
8.4
-1.3 vs catalog 9.7
Spread
0.1–83.2
median 11.4 · σ 17.7
How the 1084 split by band
Exemplar 16Strong 46Developing 113Thin 148Emerging 228Minimal 533
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Developer Ergonomics 18.4 17.9 +0.5 1084
Operational Transparency 10.6 11.3 -0.7 1084
Contract Governance 5.4 6.4 -1 1084
Access Clarity 20.2 22.3 -2.1 1084
Discoverability 58.2 60.4 -2.2 1084
Contract Quality 14.8 17.5 -2.7 1084

A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.

What this cohort publishes
ArtifactThis cohortCatalogDifference
MCP server (any) 19% 16% +3
MCP server (first-party) 7% 7% 0
Agent Skills 0% 0% 0
OAuth scopes 6% 9% -3
Security 74% 88% -14
Arazzo workflows 3% 2% +1
Governance rules 9% 13% -4

mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.

Top by Kin Score
  1. 1 Stripe 83.2
  2. 2 Svix 79.2
  3. 3 Mux 75.4
  4. 4 Optimizely 75.1
  5. 5 Ghost 74.4
  6. 6 Twilio 73.4
  7. 7 Spade 73.1
  8. 8 Lightspark 71.4
  9. 9 MethodFi 71.4
  10. 10 Plaid 68.2
Top by Agent Readiness
  1. 1 Zapier 61.5
  2. 2 Mem 61.3
  3. 3 Endgame 56.8
  4. 4 Wefunder 55.9
  5. 5 Equals 54.4
  6. 6 Figma 53.2
  7. 7 Lightspark 52.6
  8. 8 Sprig 52.3
  9. 9 Ripple Labs 51.8
  10. 10 Svix 49.9
This roster declares 1097 members; 1084 resolve to a provider in the catalog and 1084 carry a score (100%). The figures above describe the scored members only.Generated from the catalog build of 25 August 2026, across 26891 providers, using the same computation served by the APIs.io cohort API. Briefs are published for rosters of 5 or more scored providers; below that a distribution is not meaningful.

Source (apis.yml)

apis.yml Raw ↑
aid: a16z
name: Andreessen Horowitz
description: >-
  Andreessen Horowitz (a16z) is a Silicon Valley venture capital firm founded in July 2009 by Marc
  Andreessen and Ben Horowitz and headquartered in Menlo Park, California. The firm invests across the
  full lifecycle from seed to venture to growth-stage technology companies, deploying stage-based checks
  that range from roughly $1M-$5M into early application bets up to hundreds of millions of dollars into
  its largest AI positions. a16z organizes around dedicated practice areas: AI, American Dynamism,
  Bio + Healthcare, Consumer, Crypto, Enterprise, Fintech, Games, Infrastructure, plus specialty vehicles
  including the Cultural Leadership Fund, Perennial, and the Speedrun accelerator. With over $90B-$100B+ in
  assets under management as of early 2026 and a public portfolio of more than 1,000 companies, a16z is one
  of the largest and most influential venture firms in the world, known for its operator-led platform model
  and notable investments including Airbnb, Coinbase, GitHub, Figma, Stripe, Databricks, Anduril, and OpenAI.
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://a16z.com/favicon.ico
x-type: venture-capital
x-category: Venture Capital
created: '2026-07-17'
modified: '2026-07-17'
specificationVersion: '0.23'
tags:
  - Venture Capital
  - Seed
  - Series A
  - Growth Equity
  - Artificial Intelligence
  - Crypto
  - Fintech
  - Enterprise
  - Infrastructure
  - Developer Tools
  - American Dynamism
  - Silicon Valley
  - North America
apis: []
common:
  - type: Website
    url: https://a16z.com/
  - type: Portfolio
    url: https://a16z.com/portfolio/
  - type: Portfolio
    url: https://a16z.com/investment-list/
  - type: Portfolio
    url: portfolio/a16z-portfolio.yml
  - type: Team
    url: https://a16z.com/team/
  - type: Team
    url: team/a16z-team.yml
  - type: InvestmentThesis
    url: https://a16z.com/about/
  - type: Blog
    url: https://a16z.com/news-content/
  - type: Podcast
    url: https://a16z.com/podcasts/
  - type: Newsletter
    url: https://a16z.com/newsletters/
  - type: News
    url: https://a16z.com/news-content/
  - type: Jobs
    url: https://jobs.a16z.com/jobs
  - type: Crunchbase
    url: https://www.crunchbase.com/organization/andreessen-horowitz
  - type: LinkedIn
    url: https://www.linkedin.com/company/a16z/
  - type: Twitter
    url: https://twitter.com/a16z
  - type: Features
    data:
      - "Stage: Seed, Venture (Series A+), Growth"
      - "Typical check: ~$1M-$5M early application bets, up to hundreds of millions for largest AI positions"
      - "Sectors: AI, American Dynamism, Bio + Healthcare, Consumer, Crypto, Enterprise, Fintech, Games, Infrastructure"
      - "Geography: Primarily United States / global technology"
      - "AUM: $90B-$100B+ (as of early 2026)"
      - "Portfolio: 1,000+ companies (a16z investment list)"
      - "Founded: 2009"
      - "HQ: Menlo Park, California, USA"
    sources:
      - https://a16z.com/about/
      - https://en.wikipedia.org/wiki/Andreessen_Horowitz
      - https://a16z.com/investment-list/
    updated: '2026-07-17'
maintainers:
  - FN: Kin Lane
    email: info@apievangelist.com
    url: https://apievangelist.com
  - FN: APIs.json
    url: http://apisjson.org
  - FN: Andreessen Horowitz
    url: https://a16z.com/

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