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Compare C17 Lab vs Mailstructures

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

Winner

C17 Lab

Cold Email Outreach Website

C17 Lab is a B2B outbound growth agency that builds and scales automated sales engines using AI-powered workflows, cold email, and multi-channel outreach to generate qualified meetings and pipeline.

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Mailstructures

Cold Email Outreach Website

Mail Structures specializes in high-volume email infrastructure, offering scalable solutions for cold email outreach including custom domain setup, email warm-up, and deliverability optimization. Designed for businesses sending up to 100,000 emails daily per address, it provides a cost-effective alternative to traditional ESPs.

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Feature Comparison

Attribute	C17 Lab	Mailstructures
Category	Cold Email Outreach	Cold Email Outreach
Rating	Winner +5.0 higher	-
Location	San Francisco, California, USA	Toronto, Canada
Services	AI-powered outbound sales systems Cold email campaigns and automation LinkedIn and multi-channel outreach Email infrastructure and deliverability setup Data-driven campaign optimization Outbound lead generation Inbound lead conversion RevOps and sales enablement Branded email infrastructure setup Custom domain and email address configuration Email warm-up and reputation management Deliverability optimization Blacklist monitoring and resolution Technical troubleshooting and support Hosting and server configuration	AI-powered outbound sales systems Cold email campaigns and automation LinkedIn and multi-channel outreach Email infrastructure and deliverability setup Data-driven campaign optimization Outbound lead generation Inbound lead conversion RevOps and sales enablement Branded email infrastructure setup Custom domain and email address configuration Email warm-up and reputation management Deliverability optimization Blacklist monitoring and resolution Technical troubleshooting and support Hosting and server configuration
Industries	SaaS E-commerce VC-backed startups Professional Services Manufacturing & Distribution B2B SaaS for Traditional Industries	-
Pros	Fast lead generation with high-quality, ICP-aligned prospects Tailored AI-powered campaigns that feel 1:1 Strong email deliverability and infrastructure setup Proven track record with case studies showing 400+ meetings in 90 days	Unlimited emails for one fixed cost Sending capacity of 100K emails per day per address Unlimited scalability One structure for all campaigns Cost-effective at $1.67 per 10,000 emails
Cons	-	No verified client reviews available on platforms like Clutch or G2 Requires technical setup and ongoing management
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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