How AI-Ready Are Y Combinator's Top Startups? (2026)

Y Combinator companies are typically early adopters of new technology. But when it comes to making their websites readable by AI agents, many YC startups still have significant gaps. We audited 50 prominent YC companies to see who's leading in AI readiness and who's falling behind. The results reveal that even tech-forward companies often neglect structured data, llms.txt files, and AI crawler permissions.

Sites Audited

Average Score

71/100

Top Performer

clerk.com

How does your y combinator companies compare?

#	Site	Score	Grade	Discovery	Data Quality	Actionability
	clerk.com	87	A	100	88	58
2	lattice.com	87	A	100	90	54
3	resend.com	86	A	98	83	69
4	loops.so	86	A	100	82	68
5	railway.app	86	A	95	88	64
6	retool.com	85	A	100	92	42
7	brex.com	85	A	100	86	52
8	zapier.com	84	B+	99	85	52
9	ashbyhq.com	83	B+	99	87	42
10	dropbox.com	81	B+	80	94	55
11	docker.com	81	B+	76	92	70
12	posthog.com	81	B+	88	89	52
13	supabase.com	81	B+	88	88	53
14	vercel.com	81	B+	86	90	52
15	fly.io	81	B+	89	91	47
16	dub.co	81	B+	99	75	58
17	amplitude.com	81	B+	88	92	47
18	mattermost.com	80	B+	80	91	59
19	webflow.com	80	B+	88	87	52
20	airtable.com	80	B+	80	94	54
21	render.com	79	B+	84	91	47
22	justworks.com	79	B+	90	90	33
23	replit.com	79	B+	85	84	59
24	segment.com	77	B+	76	88	58
25	algolia.com	77	B+	75	88	58
26	inngest.com	77	B+	86	87	38
27	gitlab.com	76	B+	76	89	48
28	mercury.com	75	B+	78	83	52
29	figma.com	75	B+	75	88	47
30	bubble.io	74	B	76	90	39
31	anthropic.com	74	B	68	95	42
32	linear.app	72	B	78	77	52
33	pipe.com	72	B	72	82	52
34	rippling.com	70	B	99	56	42
35	miro.com	69	B	62	87	48
36	cal.com	66	B	74	68	47
37	stripe.com	65	B	78	63	43
38	loom.com	65	B	62	78	47
39	neon.tech	64	C+	96	40	47
40	airbnb.com	62	C+	55	78	43
41	tldraw.com	59	C+	47	83	36
42	mintlify.com	54	C	75	33	52
43	deel.com	53	C	74	37	42
44	convex.dev	50	C	69	35	42
45	notion.so	48	C	59	37	46
46	mixpanel.com	44	D	54	38	38
47	openai.com	33	D	30	27	52
48	ramp.com	9	F	10	0	24
49	gusto.com	8	F	8	0	24

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