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

69/100

Top Performer

retool.com

How does your y combinator companies compare?

#	Site	Score	Grade	Discovery	Data Quality	Actionability
	retool.com	88	A	100	93	52
2	lattice.com	87	A	100	90	54
3	resend.com	86	A	98	82	69
4	loops.so	86	A	100	82	64
5	railway.app	86	A	95	88	64
6	clerk.com	86	A	100	87	58
7	brex.com	85	A	100	86	52
8	inngest.com	84	B+	99	87	47
9	zapier.com	83	B+	99	83	52
10	docker.com	82	B+	78	93	70
11	dropbox.com	81	B+	80	94	55
12	supabase.com	81	B+	87	89	53
13	airtable.com	81	B+	80	95	54
14	amplitude.com	81	B+	88	92	47
15	mattermost.com	80	B+	80	91	59
16	render.com	80	B+	85	91	47
17	webflow.com	80	B+	88	87	52
18	gitlab.com	79	B+	76	92	58
19	segment.com	79	B+	77	91	58
20	vercel.com	79	B+	87	89	42
21	justworks.com	79	B+	90	90	33
22	algolia.com	77	B+	75	88	58
23	dub.co	76	B+	87	73	58
24	mercury.com	76	B+	79	84	52
25	replit.com	75	B+	84	80	47
26	bubble.io	75	B+	77	90	39
27	notion.so	75	B+	72	92	46
28	figma.com	75	B+	75	88	47
29	anthropic.com	73	B	68	93	42
30	pipe.com	72	B	72	82	52
31	rippling.com	69	B	94	57	42
32	ashbyhq.com	66	B	67	78	42
33	stripe.com	65	B	78	63	43
34	loom.com	65	B	62	78	47
35	cal.com	64	C+	72	64	47
36	neon.tech	64	C+	96	40	47
37	cal.com	64	C+	72	64	47
38	miro.com	64	C+	55	88	33
39	tldraw.com	59	C+	47	83	36
40	deel.com	53	C	75	36	42
41	linear.app	50	C	67	33	52
42	convex.dev	50	C	69	35	42
43	posthog.com	49	C	65	36	43
44	fly.io	49	C	62	38	47
45	airbnb.com	46	C	35	59	43
46	mintlify.com	46	C	55	34	52
47	mixpanel.com	44	D	53	38	38
48	openai.com	33	D	30	26	52
49	gusto.com	19	F	8	25	27
50	ramp.com	9	F	10	0	24

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