Site Health Report Card

costco.com

  • Costco
  • Shopping · Warehouse
  • Online since 1996
  • Checked Sep 30, 2026

“Bulk savings. Bulk page.”

Pica's take. Costco's site is the online version of the warehouse: practical, a little heavy, and happy to sell you forty rolls of anything. The locks are good and the guest list is moderate. The hot dog is still a dollar fifty.

B+89 / 100

Overall health

#63 of 100 sites graded

  • Largest paint

    3.4s

  • Page weight

    4.8 MB

  • Requests

    160

  • Third-party scripts

    19

  • Domain age

    30 yrs

  • Blocklists

    0 / 60

Timed by our own browser

Site Speed

C-
70

Gets there, with notes.

Largest paint (LCP)
3.4s
First paint (FCP)
1.6s
Server response (TTFB)
450 ms
Layout shift (CLS)
0.07
Page weight
4.8 MB
Requests
160

Pica: Five megabytes, sold in a pack of three.

Run the Speed Test on costco.com

A look from the outside

Security Check

A-
91

In excellent shape.

HTTPS everywhere
Yes
HSTS
Preloaded
TLS
1.3
Content Security Policy
Partial
Mixed content
None
Third-party scripts
19

Pica: Nineteen outside scripts. Membership required.

Run the Hack Check on costco.com

What the internet says about it

Reputation Check

A
95

In excellent shape.

Domain age
30 years
Blocklists
0 of 60
Malware reports
None
Email authentication
DMARC reject
Certificate
Valid · 100 days
Lookalike domains
Plenty

Pica: Thirty years online. Hot dog price unchanged. Respect.

Run the Tracker Check on costco.com

Is it in a good neighborhood?

Hosting Check

A+
100

In excellent shape.

Network
Akamai · AS20940
Content delivery
Akamai
IPv6
Yes
HTTP/3
Yes
Shared-IP neighbors
Shared CDN, well kept
Flagged neighbors
0

Pica: Akamai. Enormous parking lot.

Run the TTFB Check on costco.com

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How we grade. Four checks, weighted equally: speed timed by our own browser, a security look from the outside, public reputation signals, and the network the site lives on. A look from the outside is not a server audit.