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Compare Closed:in vs Refine Labs

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

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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Winner

Refine Labs

Paid Advertising & PPC Website

Refine Labs is a Boston-based B2B demand generation agency that helps mid-market and enterprise SaaS companies change the way they measure and execute marketing. Its Revenue Engine Optimization services and The Vault learning platform are designed to drive qualified pipeline, lower CAC, and improve win rates.

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Feature Comparison

Attribute	Closed:in	Refine Labs
Category	Cold Email Outreach	Paid Advertising & PPC
Rating	-	Winner +4.5 higher
Location	Utrecht	Boston, MA, USA
Features	Robust enablement through The Vault, community, and content, helping clients internalize	Robust enablement through The Vault, community, and content, helping clients internalize
Services	Cold email campaign design & ops Prospect sourcing & enrichment (Clay stacks) Deliverability engineering & inbox landing Reply qualification workflows & appointment setting Template + sequence personalization at scale Paid media strategy and execution (LinkedIn, Google, YouTube, Meta, Reddit, CTV) Content and creative development Account-based marketing programs Split the Funnel and Pipeline Sources analysis Analytics and reporting on CAC, pipeline, and win rates Change management and strategic consulting The Vault on-demand education platform with playbooks, templates, and training	Cold email campaign design & ops Prospect sourcing & enrichment (Clay stacks) Deliverability engineering & inbox landing Reply qualification workflows & appointment setting Template + sequence personalization at scale Paid media strategy and execution (LinkedIn, Google, YouTube, Meta, Reddit, CTV) Content and creative development Account-based marketing programs Split the Funnel and Pipeline Sources analysis Analytics and reporting on CAC, pipeline, and win rates Change management and strategic consulting The Vault on-demand education platform with playbooks, templates, and training
Industries	SaaS fintech recruitment agencies e-commerce financial services	B2B SaaS Technology
Pros	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	Employee reviews often highlight smart colleagues, a learning-oriented culture,
Cons	No client reviews available on Clutch or G2 Small team (1-10 employees) may limit capacity for large-scale campaigns	Employee feedback indicates that periods of fast scaling have included layoffs and
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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