YC AI visibility / Winter 2026

Most AI-visible companies in YC Winter 2026

We scored 137 active B2B and fintech companies from Y Combinator's Winter 2026 batch on how easily ChatGPT, Perplexity, Claude and AI agents can find, understand and use them. Didit leads with 98/100. Data from our crawl on October 18, 2026; scores are a homepage snapshot, not live.

Winter 2026 average score

All-YC average (-1 for this batch)

56%

of this batch have no llms.txt (all YC: 55%)

#	Company	Score	Crawlers	Content	Schema	Agents
1	Didit didit.me	98	95	100	100	100
1	Lucent lucenthq.com	98	95	100	100	100
1	Sitefire sitefire.ai	98	95	100	100	100
4	Captain captain.dev	97	95	94	100	100
4	Caretta caretta.so	97	95	94	100	100
6	Compresr compresr.ai	96	100	87	100	100
6	Superpenguin superpenguin.ai	96	100	100	100	83
6	The Token Company thetokencompany.com	96	95	93	100	100
9	Balance getbalance.ai	95	95	100	100	83
9	Booko booko.com	95	100	94	100	83
9	Martini martini.film	95	92	93	100	100
12	Agentic Fabriq agenticfabriq.com	94	95	85	100	100
12	FullSeam fullseam.com	94	100	100	100	74
12	Payna payna.com	94	95	94	100	88
12	Unifold unifold.io	94	100	93	100	83
16	Avoice avoice.co	93	95	94	100	83
16	Kita kita.ai	93	95	94	100	83
16	Rhizome AI rhizomeai.com	93	95	94	100	83
16	Salus usesalus.ai	93	95	94	100	83
20	21st 21st.dev	92	95	85	100	90
20	AutoSitu autositu.com	92	95	93	100	83
20	Autumn autumn.ai	92	95	93	100	83
20	Moda moda.dev	92	95	100	100	71
20	OpenSpec openspec.dev	92	95	100	100	71
20	Oximy oximy.com	92	95	100	100	74
20	Panta pantainsure.com	92	100	85	100	83
20	Sila silahq.com	92	95	93	100	83
28	Button Computer buttoncomputer.com	91	95	96	100	74
28	Copperlane copperlane.ai	91	95	87	100	83
28	End Close endclose.com	91	92	91	100	83
28	Lexius lexius.ai	91	95	100	88	74
28	o11 o11.ai	91	89	94	100	83
28	Pollen pollen.cx	91	95	94	100	74
34	Bubble Lab bubblelab.ai	90	100	93	88	74
34	Cardboard cardboard.ai	90	92	94	100	74
34	Corelayer corelayer.com	90	95	93	100	71
34	Emdash emdash.com	90	95	93	100	71
34	General Legal general.legal	90	95	100	67	83
34	Laurence laurence.com	90	92	94	100	74
34	Parameter parameter.ai	90	92	94	100	74
34	Signals returnsignals.com	90	95	93	100	74
34	Tepali tepali.com	90	95	93	100	74
34	VOYGR voygr.tech	90	89	100	100	71
44	Chamber usechamber.io	89	92	93	100	74
44	Corvera corvera.ai	89	100	94	88	64
44	Khotan khotan.com	89	95	94	88	74
47	Lance lance.live	88	95	87	100	71
47	Oxus oxus-ai.com	88	95	94	100	62
47	Palus Finance palus.finance	88	95	100	67	74
47	Samora AI samora.ai	88	95	94	100	62
47	Synthetic Sciences syntheticsciences.ai	88	95	94	100	62
52	Orthogonal orthogonal.com	87	95	100	20	100
53	Maven trymaven.com	86	100	93	100	47
54	EigenPal eigenpal.com	85	95	94	100	47
54	Jinba jinba.io	85	95	94	100	47
56	Vector Legal vectorlegal.com	84	95	72	100	71
57	Cumulus Labs cumuluslabs.io	82	95	94	100	35
57	LegalOS legalos.ai	82	95	94	100	35
57	MochaCare mochacare.com	82	95	93	100	38
57	Sponge paysponge.com	82	95	85	100	47
57	Zatanna zatanna.ai	82	95	79	88	62
57	ZeroSettle zerosettle.io	82	95	100	8	83
63	REV1 rev1.so	81	100	93	100	26
63	TensorTest tensortest.com	81	100	94	100	26
65	Ashr ashr.io	80	100	89	88	35
65	Grade usegrade.com	80	95	79	100	47
65	shortkit shortkit.dev	80	95	94	8	83
65	Sparkles sparkles.dev	80	95	93	67	47
65	Unisson unisson.ai	80	95	94	100	26
70	Aemon aemon.ai	79	89	94	88	38
70	Stilta stilta.com	79	100	93	88	26
72	Aurorin CAD aurorincad.com	78	95	94	88	26
72	Maywood maywoodai.com	78	92	83	100	35
72	Wideframe wideframe.com	78	95	100	55	38
75	Cajal caj.al	77	95	83	100	26
75	Traverse traverse.so	77	92	59	100	62
77	RamAIn ramain.ai	74	95	91	20	54
78	Constellation Space constellation.space	73	95	64	100	35
78	Overshoot overshoot.ai	73	95	81	20	62
80	/dev/fast dev.fast	72	78	94	67	35
80	Fixture fixture.ai	72	95	94	8	47
80	MouseCat mousecat.ai	72	95	94	8	47
80	Sentrial sentrial.com	72	95	38	100	62
84	Anchorhead anchorhead.ai	71	80	89	88	26
85	Moritz moritzlegal.com	70	95	89	20	38
85	Robby tryrobby.com	70	95	94	8	38
85	Veriad veriad.com	70	95	87	8	47
88	Haladir haladir.com	69	95	87	20	38
88	RunAnywhere runanywhere.ai	69	95	59	20	71
88	Vela tryvela.ai	69	95	100	8	26
91	Byteport byteport.com	68	95	81	20	38
91	Canary runcanary.ai	68	95	83	20	38
91	Ossus ossus.com	68	95	96	8	26
91	Skillsync skillsync.com	68	80	93	20	47
95	Cardinal trycardinal.com	67	95	79	20	38
95	Quotient Labs quotientlabs.com	67	80	96	20	38
95	Sequence Markets sequencemkts.com	67	100	46	100	26
95	Wayco wayco.ai	67	85	89	8	47
99	Instinct instinct.xyz	66	85	79	20	47
99	Perfectly perfectly.so	66	95	89	8	26
99	Velum Labs velum-labs.com	66	95	48	100	26
102	Chasi chasi.ai	65	100	74	20	26
102	Luel luel.ai	65	95	42	100	26
102	Piris Labs pirislabs.io	65	100	38	100	26
105	SpotPay spotpay.ai	64	95	83	8	26
106	Fed10 fed10.ai	63	95	38	100	26
106	IncidentFox incidentfox.ai	63	80	84	20	35
108	BeeSafe AI beesafe.ai	62	85	79	8	38
108	Proximitty proximitty.ai	62	80	94	8	26
108	Zymbly zymbly.com	62	80	94	8	26
111	Valgo valgo.ai	61	95	69	20	26
112	Crosslayer Labs crosslayerlabs.com	60	80	83	20	26
112	InventoryQuant inventoryquant.com	60	77	81	8	38
112	Mantis mantisbiotech.com	60	85	83	8	26
112	Terminal Use terminaluse.com	60	80	51	88	26
112	Visibl Semiconductors visiblsemi.com	60	92	38	20	62
117	Burt burthq.com	59	80	83	8	26
117	Polymath polymathlabs.ai	59	100	55	20	26
117	Revion revion.inc	59	91	27	100	26
120	Shofo shofo.ai	53	80	63	8	26
120	Talking Computers talkingcomputers.ai	53	85	59	8	26
122	Confluence Labs confluence.sh	51	80	50	20	26
122	Forum forum.market	51	95	38	8	26
124	Turnstone myturnstone.ai	50	100	31	8	26
125	Polymorph usepolymorph.com	48	80	40	20	26
126	BaseFrame baseframe.co	47	85	36	8	26
127	Fern fern.bot	46	80	40	8	26
127	Menza menza.ai	46	80	40	8	26
127	Reframe usereframe.ai	46	82	38	8	26
130	Cofia cofia.ai	45	89	23	8	26
131	Approxima approxima.ai	44	85	27	8	26
132	Ressl AI ressl.ai	43	80	29	8	26
133	Axis axisanalysis.com	42	80	26	8	26
133	Protent protent.ai	42	80	27	8	26
133	Verdex verdexai.com	42	80	27	8	26
136	Alt-X alt-x.co	41	80	22	8	26
137	Fenrock AI fenrock.ai	34	50	34	8	26

Sub-scores: Crawlers = AI crawler access, Content = answer-engine content, Schema = structured data, Agents = agent readiness (llms.txt, API/MCP). Ties share a rank.

YC Winter 2026 vs all of YC

Area	Winter 2026	All YC
Overall score	76	77
AI crawler access	92	93
Answer-engine content	80	82
Structured data	64	62
Agent readiness	53	56

Most common gaps in YC Winter 2026

No discoverable API or MCP for agents90% (all YC: 87%)

No question & answer content64% (all YC: 71%)

No docs / help content linked58% (all YC: 46%)

No llms.txt56% (all YC: 55%)

Pricing not machine-readable50% (all YC: 40%)

No product / organization schema42% (all YC: 46%)

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Other YC batches

All YC companies Fall 2026 Summer 2026 Spring 2026 Fall 2025 Summer 2025 Spring 2025 Winter 2025 Fall 2024 Summer 2024 Winter 2024 Summer 2023 Winter 2023 Summer 2022 Winter 2022 Summer 2021 Winter 2021 Summer 2020 Winter 2020 Summer 2019 Winter 2019 Summer 2018 Winter 2018 Summer 2017 Winter 2017 Summer 2016 Winter 2016 Summer 2015 Winter 2015 Summer 2014 Winter 2014 Summer 2013 Winter 2013 Summer 2012 Winter 2012 Summer 2011 Winter 2011

Methodology: how the YC dataset was built. Batch labels come from Y Combinator's public directory; RankRoot is not affiliated with Y Combinator.