The Contest Logger for Radio Amateurs
SD by EI5DI (ei5di.com) scores 61 out of 100 on Brand Analyzer, placing it in the Developing tier among Technology brands, Other brands, in the 8th percentile of 52996 Technology brands.
SD by EI5DI is a free contest logging software designed for amateur radio operators, created and maintained by Paul O, a ham radio operator with the callsign EI5DI. The tool is lightweight and efficient, aimed at helping radio contesters log contacts quickly and reliably during competitive radio contesting events. It is positioned as a no-cost solution widely used within the amateur radio community for its simplicity and dependable performance.
| Brand Name | SD by EI5DI |
|---|---|
| Domain | ei5di.com |
| Industry | Technology, Other |
| Main Competitors | N1MM Logger+, Win-Test (68/100), WriteLog (69/100), DXLog.net (68/100), Log4OM (73/100) |
Moz Domain Authority 31/100 vs category average 39 / leader 100 - limited third-party links, so AI systems rarely encounter mentions of the brand.
No Wikipedia presence was found - a major gap, since Wikipedia is among the most heavily weighted sources in AI training data.
The homepage meta description reads "SD by EI5DI - Contest Logger - Paul O" (Meta description: 9 words. No OG description (falling back to meta)) - this is the summary AI engines are most likely to quote.
Structured data on the homepage: No structured data or Open Graph tags detected. Adding Organization and FAQ schema would further help AI crawlers parse the brand's identity.
AI-crawler access: No robots.txt found (default: all bots allowed, but explicit file preferred) - robots.txt controls whether engines like GPTBot and ClaudeBot can read the site at all.
Detected tech stack: Cloudflare.
Social footprint: verified profiles on Facebook, Instagram; no detected presence on X (Twitter), LinkedIn, YouTube, GitHub - consistent profiles reinforce the brand's identity across the web.
0 Reddit mentions - community discussion signals real-world reputation to AI models.
Live results from asking a general-purpose AI assistant about the brand, checked October 2026.
When asked "What is SD by EI5DI?", Claude could identify the brand as of October 2026. SD is a free, lightweight contest logging program for amateur radio operators, created by Irish ham radio enthusiast EI5DI, and it's been a popular tool for logging contacts during radio contests since the DOS era. Best known for Being a simple, free DOS-based (later Windows-compatible) ham radio contest logging software.
When asked "Best brands similar to SD by EI5DI?", Claude would recommend SD by EI5DI as of October 2026. It's a well-regarded, long-standing free tool in the ham radio contesting community, so I'd mention it alongside other contest logging software like N1MM or WriteLog.
Common questions people ask in Google, ChatGPT, Claude, Gemini, Perplexity, and other AI search engines.
SD by EI5DI's main competitors in Technology: Win-Test (68/100), WriteLog (69/100), DXLog.net (68/100), Log4OM (73/100).
Sources: Brand Analyzer scan
SD by EI5DI has low AI-search visibility, scoring 12/100 on Brand Analyzer's AI visibility composite (visibility 0, trust 19, recommendation 27). This estimates how likely AI engines like ChatGPT, Claude, Gemini and Perplexity are to know, trust, and recommend the brand.
Sources: SD by EI5DI official site
SD by EI5DI scores 27/100 on Brand Analyzer's AI recommendation signal, indicating it is less likely to be surfaced when AI assistants like ChatGPT suggest Technology options. Recommendation depends on crawlability, structured data, and category authority.
Sources: SD by EI5DI official site
SD by EI5DI is a free contest logging software application designed for amateur radio operators. It was created and is maintained by Paul O, an amateur radio operator with the callsign EI5DI, to support contesters during radio competitions.
Sources: SD by EI5DI official site
SD by EI5DI provides amateur radio operators with a tool to log contacts during radio contests. It is designed to be fast, reliable, and lightweight, helping contesters efficiently record contact information as they compete in real time.
Sources: SD by EI5DI official site
SD by EI5DI can improve AI discoverability by strengthening structured data (Organization and FAQ schema), maintaining an accurate Wikipedia/Wikidata entity, earning authoritative citations, and keeping content crawlable for AI bots. Brand Analyzer measures these as visibility, trust, and recommendation signals.
Sources: SD by EI5DI official site
SD by EI5DI offers a single core product: contest logging software for amateur radio operators. This software is used to record and manage contacts made during radio contests, supporting contesters in tracking their competitive performance.
Sources: SD by EI5DI official site
SD by EI5DI is known for being a free, lightweight, and reliable contest logging tool within the amateur radio community. It has built a reputation among radio contesters for simplicity and dependable performance during competitive contesting events.
Sources: SD by EI5DI official site
SD by EI5DI is used by amateur radio operators and contesters who need efficient software to log contacts during radio contests. Its target audience includes hobbyist and competitive ham radio enthusiasts worldwide who require a free and reliable logging tool.
Sources: SD by EI5DI official site
SD by EI5DI scores 12/100 for AI visibility - how well ChatGPT, Claude, Perplexity and Google AI Overviews can discover, identify and cite the brand.
SD by EI5DI has a weak AI-visibility profile at 12/100 - a proxy for how readily ChatGPT, Perplexity and Google's AI Overviews can recognise and cite it. Its strongest area is recommendation likelihood (27/100) and its weakest is visibility (0/100). It benefits from open access for AI crawlers (GPTBot, ClaudeBot, etc.). The main gaps holding it back: no clear Wikipedia entity to anchor it in LLM training data, no strong Wikidata entry and a low Moz Domain Authority of 31/100. In a live check, Claude could already identify SD by EI5DI from memory (October 2026) - a sign these signals are paying off.
The score combines seven dimensions - name quality, digital presence, visual identity, messaging clarity, trust foundation, AI discoverability, and brand authority - into a single objective benchmark.
Ranked closest to SD by EI5DI: ViharGen.ai (61/100), EDX (61/100), eJournalPress (61/100), Electro Optics (61/100).
A step up - brands to learn from: Zypp Electric (71/100), 作业帮 (Zuoyebang) (71/100).
Category leader: Hostinger (97/100).
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