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The 10 best performing websites for AI agents October 2026

10 domains from the Index cohort (the domains the Index re-scores every month). Of those, only the 10 highest-scoring domains. Snapshot taken 8 Oct 2026 (UTC).

What the snapshot shows

Median score87.7 ExcellentThe median domain scores 87.7 out of 100, in the Excellent band.Good or better100%10 of 10 domains score 72 or more.Poor or critical0%0 of 10 domains score under 58.Strongest category93.4 ExcellentDiscovery averages 93.4; Market ranking is the weakest, at 72.5.Agent sessions100%10 of 10 domains were scored with live agent sessions; the rest on protocol probes alone.

How the scores fall

10 domains by score band, 100% good or better.

87.7
median
Excellent
6 (60%)
85+
Good
4 (40%)
72-84
OK
0 (0%)
58-71
Poor
0 (0%)
40-57
Critical
0 (0%)
<40

The median is 87.7 and the average 86.5, out of 100.

By category

Average score in each category, strongest first. Discovery leads; Market ranking trails.

08
categories
  • Discovery93.4
  • Brand awareness89.7
  • Information retrieval88.7
  • Task completion86.6
  • Delegated access85.2
  • Accuracy83.8
  • Contact & communication83.1
  • Market ranking72.5

By sector

Median score in each sector, highest first. Sectors with fewer than five domains are listed but not compared.

05
sectors
SectorDomainsMedianAverageHighest score
Professional services1 domain, average 91.7, highest cloudflare.com
191.791.7cloudflare.com 91.7
SaaS6 domains, average 87.4, highest stripe.com
688.387.4stripe.com 89.0
Utilities1 domain, average 84.6, highest figma.com
184.684.6figma.com 84.6
Marketplace1 domain, average 83.3, highest ramp.com
183.383.3ramp.com 83.3
Travel1 domain, average 80.5, highest airbnb.com
180.580.5airbnb.com 80.5

Every domain in this report

Scores as they stood at the snapshot, highest first. Each links to its live scorecard.

10
domains
RankDomainSectorScore
1
cloudflare.comProfessional services
Professional services91.7 (Excellent)
2
stripe.comSaaS
SaaS89.0 (Excellent)
3
stuntdouble.ioSaaS
SaaS89.0 (Excellent)
4
linear.appSaaS
SaaS88.5 (Excellent)
5
airwallex.comSaaS
SaaS88.1 (Excellent)
6
mintlify.comSaaS
SaaS87.2 (Excellent)
7
figma.comUtilities
Utilities84.6 (Good)
8
ramp.comMarketplace
Marketplace83.3 (Good)
9
anthropic.comSaaS
SaaS82.8 (Good)
10
airbnb.comTravel
Travel80.5 (Good)

How this was measured

Protocol probes for every domain, plus live agent sessions for 10 of 10.

100%
with agent sessions

Each score blends deterministic protocol probes (robots.txt, sitemaps, llms.txt, JSON-LD, MCP and OAuth discovery, bot-challenge posture and per-provider reachability) with live agent sessions where they have run, graded against a rubric independent of the agent. 10 of the 10 domains here include agent sessions; the rest were scored on probes alone.

The snapshot records whether agent sessions ran for each domain, not which models they ran on. Each domain's live scorecard names the models behind its latest sessions.

The domains were last scored between 28 Sept 2026 (UTC) and 6 Oct 2026 (UTC), and the snapshot was taken 8 Oct 2026 (UTC). The numbers on this page are frozen at that point; the live scorecards they link to keep moving.

The full method is on the methodology page.

Cite this report

Download PDF

Stunt Double Index, “The 10 best performing websites for AI agents October 2026”, snapshot of 8 Oct 2026. https://index.stuntdouble.io/reports/10-best-websites-oct-26