← Back to browse

Sparrow-2

Show HN: Sparrow-2 – Solving the cocktail party problem

United States Estimated origin: United States

Added August 27, 2026 · Last analysed August 27, 2026 · via Hacker News

StackScope is a free public catalogue of indie launches. We find launches on Product Hunt, Hacker News and similar feeds, then crawl each site to detect its tech stack and score it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 27 August 2026; the live site may have changed since.

Sparrow-2 is largely in shape, with complete legal pages, a thorough launch checklist, and well-configured email security. Main gaps: missing several security headers, no robots.txt, and tracking cookies set before any opt-in.

Launched on Hacker News on August 27, 2026. The site is served through Cloudflare. The crawl picked up 43 technologies on this site, covering advertising, analytics, javascript library, and package cdn. The stack includes Anthropic, AudioEye, and cdnjs.

If you own this site, refresh the snapshot and see the full fix list any time →

Vibe Score 15 · Few AI signals
How much the site looks AI-generated. Informational pattern-match signal, not a verdict. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (43) · Scale-up stack

Infrastructure
CDN Cloudflare (2)
Security Cloudflare Bot Management
Email
Business email Google Workspace (3)
Email marketing Customer.io
Transactional email Resend
SendGrid
Build & Framework
Font Google Fonts
JavaScript library clipboard.js
GSAP (2)
jQuery
Swiper (2)
Package CDN cdnjs
jsDelivr (2)
unpkg
Realtime Pusher
Site builder Webflow (2)
Video Plyr
YouTube (2)
Analytics & Marketing
Advertising Facebook Pixel (3)
Google Ads (2)
LiveIntent
LiveRamp
Reddit Ads (3)
X (Twitter) Ads (3)
Analytics Claydar (2)
Google Analytics (4)
Hotjar (2)
Microsoft Clarity
Reo.dev
Marketing OptiMonk (4)
Marketing automation Default
SEO Google Search Console
LinkedIn (4)
Social Twitter Widgets
Tag management Google Tag Manager (4)
Business Tools
Accessibility AudioEye (3)
CRM LeadConnector
Error tracking Datadog
Sales intelligence RB2B
Vector (4)
Widget Elfsight (3)
AI & Emerging
AI API Anthropic
AI service OpenAI (2)

Infrastructure

Network
AS16509 · US
DNSSEC
Not enabled
DNS responses unsigned. Cache-poisoning vulnerable.
Green hosting
Not green hosted
No green-energy record. Data from The Green Web Foundation.
SSL Certificate
Let's Encrypt
Valid 12 Jul 2026 to 10 Oct 2026
Certificate as captured in this snapshot, not a live check.

Email Security

SPF ~all Soft-fail (~all). Common and accepted.
DKIM Detected via known email provider
DMARC p=quarantine Quarantine (moderate)
?
MTA-STS Not deployed. Mail to your domain can be downgraded to plaintext en route.
?
TLS-RPT Not configured. You won't hear about silent SMTP TLS handshake failures.

Storage (56)

Cookies (32)
NameLifetimeDetected as
bcookie 1y LinkedIn
guest_id 1y X (Twitter) Ads
guest_id_ads 1y X (Twitter) Ads
guest_id_marketing 1y X (Twitter) Ads
lidc 1d LinkedIn
li_gc 6mo LinkedIn
muc_ads 1y X (Twitter) Ads
om_botd < 1h -
optiMonkClient 1y OptiMonk
optiMonkClientId 1y OptiMonk
optiMonkSession session OptiMonk
personalization_id 1y X (Twitter) Ads
VISITOR_INFO1_LIVE 6mo YouTube
VISITOR_PRIVACY_METADATA 6mo YouTube
YSC session -
_cfuvid session Cloudflare
_dd_s 1y Datadog
_fbp 3mo Facebook Pixel
_ga 1y Google Analytics
_gat_gtag_UA_255210763_1 < 1h Google Analytics
_ga_SBQHZWT4FS 1y Google Analytics
_gcl_au 3mo Google Ads
_gid 1d Google Analytics
_lc2_fpi 1y LeadConnector
_lc2_fpi_js session LeadConnector
_li_dcdm_c session LiveRamp
_rdt_uuid 3mo Reddit Ads
_twpid 1y X (Twitter) Ads
__cf_bm < 1h Cloudflare
__obref 1y -
__Secure-ROLLOUT_TOKEN 6mo -
__Secure-YNID 6mo YouTube
Local storage (13)
KeySizeDetected as
audioeye_at_start_message 14 B AudioEye
audioeye_reader_settings 274 B AudioEye
lastExternalReferrer 5 B -
lastExternalReferrerTime 13 B -
mbsy/info 55 B -
om-country 40 B OptiMonk
om-ip_block 52 B OptiMonk
OptiMonkShopAttributes 2 B OptiMonk
OptiMonkVisitorAttributes 649 B OptiMonk
vector_pixel_c7f3f909-79ee-4aed-bb43-4e7bade04738_visitor_id 36 B -
vector_pixel_c7f3f909-79ee-4aed-bb43-4e7bade04738_visitor_uuid 36 B Vector
_gcl_ls 332 B Google Ads
_li_duid 40 B LinkedIn
Session storage (11)
KeySizeDetected as
claydar_device_id 36 B Claydar
claydar_session 261 B -
mbsy/d2ec0fb4-059b-4336-92d0-b59946e3cd8a/client_uuid 36 B -
mbsy/d2ec0fb4-059b-4336-92d0-b59946e3cd8a/mbsy_editor 5 B -
mbsy/d2ec0fb4-059b-4336-92d0-b59946e3cd8a/mbsy_user 88 B -
oaiq_cs:WQ7x2tofDQg1jdtYTz2ymn 1 B OpenAI
radar_sn_de 121 B Vector
radar_sn_ped 122 B Vector
radar_sn_rs 122 B Vector
radar_sn_sg 121 B Vector
radar_sn_sh 121 B Vector

Readiness Breakdown How?

Custom title and meta description
Open Graph tags (title, image, description) (partial) missing og:description
Twitter card meta tags
Canonical URL declared
Responsive viewport meta tag
Favicon present
Semantic HTML (nav, main, article)
Page title is 73 characters (advisory) Google only shows about 60 characters of the title in search results; aim for 50–60 to keep the whole thing visible.

Performance How?

49 ms Server response
99% Faster than peers
1696 ms Largest contentful paint
0.07 Cumulative layout shift
15.2 MB Page weight
9.0 MB Image weight
41 Third-party domains
0 Console errors
0 Failed requests

19 images: 10 oversized, 17 without width/height, 18 missing alt text

Indicative grade from a single automated render, not a substitute for Lighthouse or field data, and not part of the StackScope score.

Vibe Score Breakdown How?

SignalPoints
AI copy signals +5
AI palette signals +5
AI layout signals +5

This score is based on structural patterns and is not definitive. Many legitimate sites may trigger signals, and AI-built sites may go undetected. It should be treated as an indicator, not a verdict.

AI Stance

Welcomes AI crawlers
llms.txt published
No AI bots blocked in robots.txt
? No directive declared
? None advertised

Well-Known Files

robots.txt
sitemap.xml (513 URLs)
security.txt
llms.txt
ads.txt
humans.txt
Privacy Policy
/privacy-policy
Terms of Service
/terms-of-service
? Consent manager not detected
Analytics set tracking cookies on our visit, with no opt-in step.
78% unique

Security Headers (2/6)

Permissions-Policy experimental (check browser support)
X-XSS-Protection deprecated (use Content-Security-Policy)

Build

Code splitting
49 JS files
11 CSS files
41 Third-party domains

Brand Colours

Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.