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Compare Simplex vs Zelst

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

Simplex

B2B Lead Generation Website

Simplex is a global pioneer in SEO technology, using proprietary software and AI to automate page creation and drive organic growth. They help mid-market and enterprise businesses scale traffic, conversions, and revenue with data-driven strategies.

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Zelst

Cold Email Outreach Website

Zelst is a highly experienced search marketing agency that helps clients to be seen and get found online. They achieve substantial return on marketing investment through creative and strategic search marketing.

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Feature Comparison

Attribute	Simplex	Zelst
Category	B2B Lead Generation	Cold Email Outreach
Rating
Location	Sao Paulo, State of Sao Paulo, Brazil	Harrogate, England, United Kingdom
Services	Advertising Display Ads PPC Content Marketing Content Strategy Data Analytics Data Science Data Visualization Marketing Advice Lead Generation Market Research SEO International SEO Local SEO SEO Consulting Technical SEO Social Media Marketing Email Marketing Marketing Automation	Advertising Display Ads PPC Content Marketing Content Strategy Data Analytics Data Science Data Visualization Marketing Advice Lead Generation Market Research SEO International SEO Local SEO SEO Consulting Technical SEO Social Media Marketing Email Marketing Marketing Automation
Industries	Architecture Ecommerce Fashion Retail Fintech Travel & Tourism	B2B Services Ecommerce Fashion Retail Food & Beverages Health & Wellness
Pros	Proprietary Indexa software automates SEO page creation at scale, reducing IT dependency. Proven track record with major brands like Leroy Merlin, Carrefour, and Sephora. Data-driven approach with AI and machine learning for sustained organic growth. Strong results: 2M monthly visits for Leroy Merlin Italy, 30% above average conversions.	Transparent, consultative approach with a focus on metrics that matter to the client.
Cons	Higher budget threshold (starting at $5,000) may not suit small businesses. Focus on mid-market and enterprise limits appeal for startups or local-only companies.	Primary geographic focus on UK and US, less suited for companies targeting other
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.

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