Compare 300cbt vs 오픈타임

Side-by-side comparison of features, pricing, services, ratings and more.

300cbt

Cold Email Outreach Website

300cbt is a Shopify-specialized development agency based in Seoul, helping direct-to-consumer (D2C) brands scale globally through strategic design, development, and marketing. Since 2017, the agency has launched over 350 Shopify stores and worked across 30+ countries. The agency focuses exclusively on Shopify, offering services such as custom store development, app integration, and eCommerce consulting.

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Winner

오픈타임

SEO & Organic Growth Website

Open Time is a specialized GEO and AI search optimization agency based in Busan, South Korea. They help Korean professionals and B2B service companies achieve accurate discovery and citation in global AI search environments like ChatGPT, Perplexity, and Naver AI Briefing using their proprietary K-GEO methodology.

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Feature Comparison

Attribute	300cbt	오픈타임
Category	Cold Email Outreach	SEO & Organic Growth
Rating	-	Winner +4.4 higher
Location	Seoul, South Korea	Busan, Busan, South Korea
Services	eCommerce Development SEO Email Marketing Social Media Marketing Web Development Web Design AI Search Optimization LLM optimization Branding Brand Strategy Backlink Management SEO Consulting Search Engine Marketing Wordpress SEO	eCommerce Development SEO Email Marketing Social Media Marketing Web Development Web Design AI Search Optimization LLM optimization Branding Brand Strategy Backlink Management SEO Consulting Search Engine Marketing Wordpress SEO
Industries	eCommerce Consumer Goods Retail	B2B Services Health & Wellness Healthcare & Hospital
Pros	Shopify experts since 2017 with over 350 stores launched Worked across 30+ countries for global D2C brands Trusted by major brands including Dior, Blue Bottle Coffee, and Dr. Martens	Specialized in Korean GEO (K-GEO) methodology for AI search optimization Provides a free AI search visibility diagnostic tool that checks global top 5 engines and Naver AI Briefing Over 200 SEO and digital marketing projects experience Covers both global AI engines (ChatGPT, Perplexity, Gemini, Grok, Claude) and Naver AI Briefing
Cons	-	Small team of 1-9 may limit capacity for large-scale projects Relatively new agency (founded 2023) with limited public client reviews
Website	Visit Site	Visit Site

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Free Plan Available

You shouldn’t have to overpay for cold email tools. With Mystrika, you won’t.

It does cold email warmup, sequences, unified inbox, and AI writing - all in one place. Every other tool that does this charges somewhere between $100 and $500 a month. Mystrika has a free plan. 500 prospects. No expiry. No card.

The people who consistently book meetings from cold email aren’t smarter. They just stopped leaving money on the table.

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