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Compare Zelst vs Closed:in

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

Winner

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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Closed:in

Cold Email Outreach Website

Closed:in is a cold-email specialist and Clay/Instantly partner building hyper-personalized outbound systems that book meetings and generate pipeline. They use Clay-powered outbound campaigns for B2B service companies to deliver sales calls within 2-3 weeks.

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Feature Comparison

Attribute	Zelst	Closed:in
Category	Cold Email Outreach	Cold Email Outreach
Rating	Winner +4.5 higher	-
Location	Harrogate, England, United Kingdom	Utrecht
Services	SEO PPC Content Marketing Social Media Marketing Email Marketing Data Analytics Marketing Automation Cold email campaign design & ops Prospect sourcing & enrichment (Clay stacks) Deliverability engineering & inbox landing Reply qualification workflows & appointment setting Template + sequence personalization at scale	SEO PPC Content Marketing Social Media Marketing Email Marketing Data Analytics Marketing Automation Cold email campaign design & ops Prospect sourcing & enrichment (Clay stacks) Deliverability engineering & inbox landing Reply qualification workflows & appointment setting Template + sequence personalization at scale
Industries	B2B Services Ecommerce Fashion Retail Food & Beverages Health & Wellness	SaaS fintech recruitment agencies e-commerce financial services
Pros	Transparent, consultative approach with a focus on metrics that matter to the client.	High reply rates on top campaigns (claimed 50%+) Quick pipeline generation (e.g., $190K in 60 days) Official Clay Solutions Partner and Certified Instantly Expert End-to-end automation using Clay and Instantly Trusted by 50+ B2B companies
Cons	Primary geographic focus on UK and US, less suited for companies targeting other	No client reviews available on Clutch or G2 Small team (1-10 employees) may limit capacity for large-scale campaigns
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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