billy.dk

We performed a comprehensive analysis of billy.dk on 2026-06-28. The website returned an HTTP 200 status code with a server response time of 20079ms. The page is served over HTTP/2 protocol with Gzip compression enabled, achieving approximately 60.0% size reduction. The total page weight is 81 KB. Warning: The website does not have a valid SSL certificate. Visitors may see security warnings in their browser, and data transmitted to and from this website is not encrypted. The security headers analysis reveals a score of 20/100 (poor). The following security headers are properly configured: Strict-Transport-Security (HSTS). However, the site is missing Content-Security-Policy, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy, which could expose the site and its users to cross-site scripting (XSS), clickjacking, and other web-based attacks. Our technology detection scan identified 11 technologies across 10 categories powering billy.dk. The detected stack includes Next.js css, React, Bootstrap, Webpack, Google Analytics 4, Segment, Google Tag Manager, Intercom, VWO, Google Fonts, and jQuery. The site uses Next.js as its primary framework (version css). The UI is built with React. Based on our comprehensive analysis of domain age, SSL configuration, email authentication, security headers, and blacklist status, billy.dk receives an overall trust score of 67/100, classified as "Likely Safe".

After conducting a thorough safety and legitimacy analysis, billy.dk receives a trust score of 67/100, which places it in the "Likely Safe" category. This score is calculated by evaluating multiple factors including SSL certificate validity, domain registration history, email authentication protocols, security header configuration, and blacklist status across major threat intelligence databases. The analysis identified several positive trust signals: a valid HTTPS connection protecting data in transit, HSTS (HTTP Strict Transport Security) enforcement preventing protocol downgrade attacks, SPF (Sender Policy Framework) email authentication preventing email spoofing, DMARC email authentication with a reject policy — the strongest available setting, and DKIM (DomainKeys Identified Mail) providing cryptographic email verification. Areas of concern include: the absence of a Content-Security-Policy header, which leaves the site more vulnerable to cross-site scripting (XSS) attacks, no X-Frame-Options header, which could allow the site to be embedded in malicious iframes (clickjacking), missing Referrer-Policy, potentially leaking URL information to third parties, the domain's WHOIS information is hidden behind a privacy service, making it harder to verify the owner's identity, and DNSSEC is not enabled, leaving DNS queries vulnerable to spoofing attacks. While these issues don't necessarily indicate malicious intent, they represent areas where the website's security posture could be improved. We checked billy.dk against 8 major blacklist databases including Google Safe Browsing, Phishtank, Urlhaus, Openphish, Dnsfilter, Spamhaus Dbl, Surbl, and Virustotal. The domain passed all 8 checks with a clean status, meaning it has not been flagged for phishing, malware distribution, spam, or other malicious activities by any of the tested threat intelligence providers.

Our technology detection engine scanned billy.dk and identified 11 distinct technologies across 10 categories. This analysis is performed by examining HTTP response headers, HTML source code patterns, JavaScript library fingerprints, CSS framework signatures, and DNS records. Framework: Next.js (version css) — provides the application framework and routing for billy.dk. UI Library: React — handles the user interface rendering and component management for billy.dk. CSS Framework: Bootstrap — provides the styling and responsive layout system for billy.dk. Build Tool: Webpack — bundles and optimizes the JavaScript and CSS assets for billy.dk. Analytics: Google Analytics 4 and Segment — tracks visitor behavior and provides traffic insights for billy.dk. Tag Manager: Google Tag Manager — manages marketing and analytics tags without code changes for billy.dk. Chat: Intercom — provides live chat and customer communication for billy.dk. A/B Testing: VWO — enables experimentation and conversion optimization for billy.dk. Fonts: Google Fonts — delivers web fonts for typography for billy.dk. JavaScript Library: jQuery — provides utility functions and DOM manipulation for billy.dk. We also extracted the following tracking identifiers: Google Tag Manager container GTM-M8PHPD. These IDs can be used to identify other websites operated by the same organization.

billy.dk delivers its homepage in 20079ms (server response time), which is considered slow by industry standards. The total page weight is 81 KB, and we detected 151 resource requests loading assets from 16 third-party domains. A high number of third-party domains can significantly impact page load time due to additional DNS lookups and TLS handshakes required for each domain. The website uses Gzip compression for text-based assets, achieving an estimated 60.0% reduction in transfer size. This reduces bandwidth usage and improves page load times, especially for visitors on slower connections. Asset minification status: 0 out of 2 CSS files and 1 out of 22 JavaScript files are minified. Minifying the remaining 23 unminified file(s) could further reduce page weight by 10-30% for those assets. Minification is a best practice that reduces download sizes without affecting functionality. From an environmental perspective, each page view of billy.dk produces approximately 0.04g of CO₂, earning a carbon rating of A. This places the website among the cleanest on the web, demonstrating efficient use of server resources and optimized content delivery. For reference, the average web page produces about 0.5g of CO₂ per page view. The page weight of 81 KB is the primary factor in this calculation. Core Web Vitals data from the Chrome User Experience Report (CrUX) is not available for billy.dk. This typically means the site doesn't have enough real-world Chrome user traffic to generate statistically significant field data, or the domain is not included in the CrUX dataset. Core Web Vitals (LCP, INP, CLS) are important Google ranking factors that measure real user experience.

billy.dk resolves to the IPv4 address 76.76.21.21, but does not support IPv6. IPv6 adoption is increasingly important as IPv4 address space becomes exhausted, and some ISPs and regions are transitioning to IPv6-only connectivity. The domain has 1 A record(s) configured. The domain name system is managed by 4 name servers: ns-1021.awsdns-63.net, ns-1025.awsdns-00.org, ns-1544.awsdns-01.co.uk, and ns-53.awsdns-06.com. Having 4 name servers provides good redundancy — if one fails, the others can continue serving DNS queries. The choice of name servers often indicates the DNS hosting provider or CDN service being used. Email for billy.dk is handled by Google Workspace with 5 MX records configured: aspmx.l.google.com, alt1.aspmx.l.google.com, and alt2.aspmx.l.google.com and 2 more. Multiple MX records provide failover redundancy — if the primary mail server is unavailable, email will be routed to the next available server. SPF (Sender Policy Framework) is configured, which specifies which mail servers are authorized to send email on behalf of this domain. This helps prevent email spoofing and improves email deliverability. DMARC (Domain-based Message Authentication, Reporting and Conformance) is configured with a reject policy — the strongest setting, instructing receiving servers to reject unauthorized emails entirely. DKIM (DomainKeys Identified Mail) is configured, adding a cryptographic signature to outgoing emails that receiving servers can verify to confirm the email hasn't been tampered with in transit. DNSSEC is not enabled for billy.dk. While not critical for most websites, DNSSEC adds an important security layer by ensuring DNS responses haven't been tampered with during transit. Enabling DNSSEC is recommended for domains handling sensitive data or financial transactions. Our subdomain enumeration scan discovered 4 active subdomains for billy.dk: api.billy.dk, status.billy.dk, support.billy.dk, and www.billy.dk. Active subdomains can reveal the organization's infrastructure, including development environments, API endpoints, and third-party service integrations.

The homepage of billy.dk contains 648 words of visible text content. This is a moderate amount of content. The page is structured with 1 H2 headings, 7 H3 headings, 0 H4 headings, 12 H5, and 0 H6 headings. The page includes 63 images. 38 images (60%) are missing alt text attributes, which is a significant concern for both accessibility and SEO. Screen readers rely on alt text to describe images to visually impaired users, and search engines use alt text to understand image content. Only 40% of images have proper alt text — we recommend adding descriptive alt attributes to all images. The link structure consists of 33 internal links pointing to other pages on the same domain and 10 external links pointing to third-party websites. There are 22 external JavaScript files, 2 CSS stylesheets, and 1 iframes on the page. The site implements the following web standards and features: robots.txt (controls search engine crawling behavior) and Schema.org structured data (AggregateOffer, AggregateRating, BreadcrumbList, ContactPoint, EntryPoint, ImageObject, ListItem, Offer, Organization, RegisterAction, SoftwareApplication, WebPage, and WebSite). Notable missing features: XML Sitemap. Adding these could improve search engine discoverability and rich result eligibility. The website has social media presence across 2 platforms: Facebook (@regnskabsprogram.online) and Linkedin (@billysbilling). An active social media presence is a positive trust indicator and helps build brand awareness and customer engagement.

The title tag for billy.dk is well-optimized at 53 characters: "Gratis og let regnskabsprogram - Kom i gang på 2 min.". The length falls within the ideal range for Google search results, ensuring the full title is displayed without truncation. The meta description is 156 characters (acceptable): "Billy er et gratis regnskabsprogram til små og mellemstore virksomheder. Send let fakturaer, og få styr på moms og bogfø...". Google typically displays up to 155-160 characters of the meta description in search results. A compelling meta description with a clear call-to-action can significantly improve click-through rates from search results. The meta robots directive is set to index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1 and a favicon is configured. Open Graph meta tags are configured with 4/4 recommended fields: OG title ("Gratis og let regnskabsprogram - Kom i gang på 2 min...."), OG description, OG image (social sharing thumbnail), OG type (website). These tags control how the page appears when shared on Facebook, LinkedIn, and other social media platforms that support the Open Graph protocol. A Twitter Card of type summary_large_image is configured, which controls how links appear when shared on Twitter/X. The "summary_large_image" type displays a large image preview, which typically generates higher engagement rates than the basic card type. The site implements Schema.org structured data with the following types: AggregateOffer, AggregateRating, BreadcrumbList, ContactPoint, EntryPoint, ImageObject, ListItem, Offer, Organization, RegisterAction, SoftwareApplication, WebPage, and WebSite. Structured data helps search engines understand the page content and can enable rich results (featured snippets, knowledge panels, star ratings) in Google search results, which can significantly increase click-through rates.