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prolific.co

https://prolific.co· First analyzed 20 May 2026· Updated 20 May 2026
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prolific.co
Desktop screenshot of prolific.co
Mobile screenshot of prolific.co
Mobile

Sponsored

Hosting Provider

Vercel
vercel.com

IP Address

76.76.21.21

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Walnut, United States

ASN

AS16509

Organization

Vercel, Inc

Server

Vercel

Nameservers

ns-cloud-c1.googledomains.com.ns-cloud-c3.googledomains.com.ns-cloud-c4.googledomains.com.ns-cloud-c2.googledomains.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
654 ms10%
Speed Index
850 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.9 MB
62 requests

Image Optimization

Lazy LoadResponsiveVercel Image Optimization
0–49
50–89
90–100

Architecture Stack

Hybrid
🔀 Hybrid
Frontend
Framework
Next.js
Infrastructure
Platform
Vercel
CDN
Vercel Image

Technology Stack

7 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

Meta Frameworks

1
Next.js

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

Customer Support

1
Intercom

Platforms

1
Vercel

SEO Analysis

B76/100
23
5
0
Meta Tags15/15
Content8/12
Headings8/8
Technical19/25
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile4/4
Indexability3/3
P
prolific.coprolific.co

Prolific | Easily collect high-quality data from real people

Prolific helps AI developers, researchers, and organizations easily access the highest-quality human data. Sign up for free.

Title Length60 chars

Recommended: 50-60 chars (~346px / 580px)

Description Length124 chars

Recommended: 120-160 chars

Issues (0)

    5 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    382 URLs

    robots.txt

    6 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    6/100
    Poor
    2 13 2

    This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

    Sponsored

    AI & LLM Readiness

    D51/100
    Bot Access
    20/25
    Machine Read.
    15/25
    Schema Data
    0/25
    Citation
    16/25

    AI Bot Access

    14/14 accessible
    AI Search
    OAI-SearchBot
    PerplexityBot
    Claude-SearchBot
    Gemini-Deep-Research
    DuckAssistBot
    Training
    GPTBot
    ClaudeBot
    Google-Extended
    Meta-ExternalAgent
    Bytespiderinfo
    Amazonbot
    Applebot-Extended
    CCBotinfo
    Fetch
    ChatGPT-User

    Machine Readability

    llms.txtvalid
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    nav
    Text ratio:2%
    Words:393
    Token eff.:Optimal
    Sections/1K:17.8
    Depth:1/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary124w
    Descriptive Headingsavg 4w
    Canonical URL
    Open Graph3/3
    Twitter Card3/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (9)
    AI readiness recommendation preview...
    Upgrade to view recommendations

    Sponsored

    Accessibility

    WCAG 2.1 Compliance

    Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
    A
    88/100
    15
    Passed
    2
    Critical
    1
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    17/20
    Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
    Forms & Inputs
    15/15
    Verifies form fields have labels, error messages are clear, and inputs are properly associated.
    Color & Contrast
    15/15
    Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
    Keyboard & Focus
    15/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    6/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

    Carbon Footprint

    SWDM v4 · Eco-Score

    Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
    55/100
    C
    192 mg
    CO₂e / view
    1.9 MB
    Page Weight
    50%
    Cleaner Than
    New Visitor
    219 mg
    vs
    Returning (cached)
    110 mg
    Annual (10K/mo)
    23.0 kg
    Emission Segments
    Data Center
    9 mg
    Network
    56 mg
    Device
    126 mg
    Resource Breakdown
    JavaScript
    316.9 KB
    Images
    206.1 KB
    CSS
    290.9 KB
    Fonts
    1015.7 KB
    HTML
    20.1 KB
    Other
    49.2 KB
    Green Hosting Verified
    Vercel
    Provider Match
    4 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    A

    Security Score

    81%Very Good
    Static / Informational

    HTTPS

    No WAF

    39d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Let's Encrypt

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    31.03.2026

    Valid Until

    29.06.2026

    Subject Alternative Names (1)

    www.prolific.com

    SHA-256 Fingerprint

    84:F6:D0:38:55:23:99:62:9E:06:3A:65:8A:8F:21:84:B6:24:8C:6B...

    Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    age
    3092
    cache-control
    🟡 0s(public, max-age=0, must-revalidate)
    content-encoding
    ⚡ Brotli(br)
    content-security-policy
    frame-ancestors 'self' https://bold-bat-abee834f89.strapiapp...
    content-type
    text/html; charset=utf-8
    date
    Wed, 20 May 2026 10:32:49 GMT
    Good Warning Issue

    Email Infrastructure

    Google Workspace

    Score

    100

    SPF
    DKIM
    DMARC

    DMARC Policy

    Reject (Strictest)

    MX Records (5)

    aspmx2.googlemail.com
    aspmx.l.google.com
    alt2.aspmx.l.google.com
    aspmx3.googlemail.com

    +1 more

    Domain Information

    prolific.co

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookie Notice (WP)

    Cookie Consent Banner
    Cookie Notice (WP)
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: Cookie Notice (WP)
    Privacy policy page linked

    Mobile Compatibility

    Viewport & Responsive Test

    Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
    C
    69/100
    Mobile Friendly1 breakpoint
    Viewport Meta
    The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
    Responsive Design
    Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
    Touch Icons
    Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
    Readable Font Size
    Base font size should be at least 16px on mobile to ensure text is readable without zooming.
    Relative Units
    Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
    No H-Scroll Risk
    No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
    Tap Targets OK
    Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
    No Fixed Widths
    No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
    Viewport
    width=device-width, initial-scale=1, maximum-scale=6
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    fontsans

    WCAG Partial
    71/100
    Readability
    /30
    21/30

    16px · LH 1.40

    Hierarchy
    /20
    18/20

    3.5x ratio · ✓ H1→H6

    WCAG
    /25
    16/25

    1:1 min contrast

    Performance
    /25
    16/25

    2 fonts · 9 req

    Heading Font

    fontsans

    Sans56px

    Body Font

    fontsans

    Sans16px

    Contrast Ratio

    1:1

    8 issues

    Reading Comfort

    ~37 CPL

    Narrow lines
    56px
    h1
    40px
    h2
    32px
    h3
    16px
    p

    ✅ Excellent readability: 16px body text is ideal for all devices.

    ✅ Optimal line spacing: 1.40 ratio (ideal range 1.4–1.6).

    ❌ Very complex text: Flesch score 22/100. Consider shorter sentences and simpler words.

    ⚠️ Partial contrast: 8 elements below WCAG AA threshold (min 1.0:1).

    ✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

    ✅ Strong hierarchy: Headlines are 3.5x larger than body text.

    Buy on MyFontsFlesch 22

    Color Palette

    9 unique colors
    5.24:1 AA Light
    #7f7f7f
    Other· 35.6%
    #000000
    Text· 14.5%
    #003eab
    Primary· 0%
    #155872
    Accent· 15.5%
    #573354
    Secondary· 7.5%
    #1a1b41
    Secondary· 7.2%
    #1c3d63
    Accent· 4.5%
    #040c35
    Accent· 3%

    Business & Marketing Stack

    4 Tools Detected

    Enterprise

    CRM Systems

    1
    HubSpotMid-Market

    Customer Relationship Management platforms

    Customer Support

    1
    IntercomMid-Market

    Live chat and helpdesk tools

    Behavior Analytics

    2
    Google Tag ManagerFree
    Google AnalyticsFree

    User behavior and product analytics

    3

    Categories

    4

    Total Tools

    0

    Enterprise

    2

    Mid-Market

    Assessment: Sophisticated marketing and sales technology infrastructure

    Sponsored

    Scripts & Styles

    19 Resources

    17
    Scripts
    2
    Styles
    12
    Async
    0
    Defer

    Top Script Sources

    local(9)googletagmanager.com(2)static.ada.support(2)widget.intercom.io(1)api.kiprotect.com(1)

    Website Identity

    prolific.co

    Location detected: 🇺🇸 United Statesvia ip
    📧 Google Workspaceen

    Sponsored

    Last analyzed: 20 May 2026 at 12:24

    Historical Analysis & Change Tracking