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

72/100

Top Performer

clerk.com

How does your y combinator companies compare?

#	Site	Score	Grade	Discovery	Data Quality	Actionability
	clerk.com	88	A	100	90	58
2	lattice.com	86	A	100	89	54
3	loops.so	86	A	100	82	68
4	railway.app	86	A	95	88	64
5	justworks.com	86	A	100	93	42
6	fly.io	86	A	100	91	47
7	resend.com	85	A	98	80	69
8	brex.com	84	B+	100	85	52
9	zapier.com	84	B+	99	84	52
10	retool.com	84	B+	100	92	38
11	ashbyhq.com	83	B+	99	87	42
12	amplitude.com	83	B+	100	84	47
13	docker.com	82	B+	76	93	70
14	render.com	82	B+	90	91	47
15	airtable.com	81	B+	80	96	54
16	dropbox.com	81	B+	80	94	55
17	supabase.com	81	B+	88	88	53
18	vercel.com	81	B+	87	90	52
19	dub.co	81	B+	99	74	58
20	posthog.com	80	B+	88	85	52
21	replit.com	80	B+	86	85	59
22	algolia.com	78	B+	78	88	58
23	mattermost.com	78	B+	80	92	47
24	inngest.com	77	B+	88	86	38
25	segment.com	77	B+	76	87	58
26	gitlab.com	75	B+	76	88	48
27	figma.com	75	B+	75	88	47
28	bubble.io	75	B+	76	91	39
29	mercury.com	74	B	77	83	52
30	anthropic.com	73	B	68	94	42
31	linear.app	73	B	78	78	52
32	pipe.com	72	B	72	82	52
33	ramp.com	72	B	73	87	38
34	miro.com	71	B	66	89	44
35	webflow.com	70	B	62	88	52
36	rippling.com	70	B	99	56	42
37	notion.so	70	B	66	82	56
38	cal.com	67	B	76	68	47
39	neon.tech	65	B	84	56	47
40	loom.com	65	B	62	78	47
41	stripe.com	64	C+	78	65	33
42	tldraw.com	59	C+	47	83	36
43	mintlify.com	54	C	75	34	52
44	deel.com	53	C	75	37	42
45	convex.dev	50	C	69	35	42
46	mixpanel.com	44	D	54	38	38
47	airbnb.com	41	D	30	50	43
48	openai.com	33	D	30	26	52
49	gusto.com	8	F	8	0	24

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