ColdStack vs. Mailshake Comparison


ColdStack ColdStack.co	Mailshake	+	+
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Across the $2B+ in receivables Monk manages, 92% of enterprise invoices have to be submitted through a corporate AP portal rather than paid from an emailed invoice. Monk submits into more than 600 of them, including Coupa, Ariba and SAP Business Network, and uploads 87% autonomously. Julia, the Monk agent for Intelligent Collections, reads customer replies and responds to what was written rather than advancing a fixed dunning sequence. 90% of invoices resolve without escalation. Email sends from your own mailbox via Gmail or Microsoft 365, so there is no new sending domain. Payments match to open invoices at 80%, rising to 95% with rules your team configures. Connects to QuickBooks, NetSuite and Dynamics 365 Business Central. Live in one to three days. 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About Stop losing deals in the 2-hour window between lead reply and your response. ColdStack brings every cold email reply from Instantly, Smartlead, and EmailBison into a single Slack channel where your team can see and act instantly. Each reply triggers a real-time notification with full engagement context—who opened what, when, and how many times. Your team replies directly from Slack, and ColdStack syncs everything back bidirectionally to your source platform. No more toggling between dashboards, Gmail, and Slack. Built for cold email agencies and sales teams who live in Slack. Mobile-ready through Slack's app.	About Put your email outreach on autopilot. Turn cold prospects into warm leads with automated prospecting outreach via email, social, and phone. Connect with more prospects, book more meetings, and generate more sales. Send personalized cold emails at scale. Engage with prospects via phone and social. Manage it all in one sequence, on one dashboard. Contact thousands of prospects all at once with personalized email campaigns, fully automated follow-ups, maximized deliverability, and proven templates. Connect with prospects everywhere they are. Seamlessly incorporate social media into your email outreach sequence, and power through cold calls with Mailshake Dialer. Monitor opens, clicks, and replies for every email you send, and know which part of your sequence is converting with Mailshake Lead Drivers.
Platforms Supported Windows Not Supported Mac Not Supported Linux Not Supported Cloud Supported On-Premises Not Supported iPhone Not Supported iPad Not Supported Android Not Supported Chromebook Not Supported	Platforms Supported Windows Not Supported Mac Not Supported Linux Not Supported Cloud Supported On-Premises Not Supported iPhone Not Supported iPad Not Supported Android Not Supported Chromebook Not Supported
Audience B2B companies	Audience Sales teams and businesses looking for a solution to improve their customer experience
Support Phone Support Not Supported 24/7 Live Support Not Supported Online Not Supported	Support Phone Support Not Supported 24/7 Live Support Not Supported Online Supported
API Offers API Not Supported	API Offers API Not Supported
Screenshots and Videos No images available	Screenshots and Videos View more images or videos
Pricing No information available. Free Version Not Supported Free Trial Not Supported	Pricing $59 per user per month Free Version Not Supported Free Trial Not Supported
Reviews/Ratings Overall 0.0 / 5 ease 0.0 / 5 features 0.0 / 5 design 0.0 / 5 support 0.0 / 5 This software hasn't been reviewed yet. Be the first to provide a review: Review this Software	Reviews/Ratings Overall 0.0 / 5 ease 0.0 / 5 features 0.0 / 5 design 0.0 / 5 support 0.0 / 5 This software hasn't been reviewed yet. Be the first to provide a review: Review this Software

Training Documentation Not Supported Webinars Not Supported Live Online Not Supported In Person Not Supported	Training Documentation Supported Webinars Not Supported Live Online Not Supported In Person Not Supported
Company Information ColdStack.co Founded: 2025 United States www.coldstack.so/	Company Information Mailshake Founded: 2015 United States mailshake.com
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Categories Cold Email Supported	Categories Auto Dialer Supported Cold Email Supported Email Marketing Supported Email Personalization Supported Email Warmup Supported Mail Merge Supported Sales Dialers Supported Sales Engagement Supported
	Show More Features Email Marketing Features A/B Testing Not Supported Artificial Intelligence Not Supported Auto-Responders Not Supported CAN SPAM Compliance Supported Customer Surveys Supported Drip Campaigns Supported Dynamic Content Supported Event Triggered Email Supported Image Library Not Supported Landing Pages/Web Forms Supported Mailing List Management Not Supported Mobile Optimized Emails Supported Reporting/Analytics Supported Subscriber Management Supported Template Management Supported WYSIWYG Email Editor Supported
Integrations Gmail Supported Slack Supported Acuity Scheduling Not Supported Agiled Not Supported Call Loop Not Supported Copper Not Supported Dialpad Sell Not Supported HubSpot Customer Platform Not Supported Hyperise Not Supported LinkedIn Not Supported Microsoft Outlook Not Supported Pabbly Connect Not Supported Paperform Not Supported Rambox Not Supported Salesforce Not Supported Singer Not Supported Slybroadcast Not Supported VoilaNorbert Not Supported WhatConverts Not Supported Zoho CRM Not Supported Show More Integrations View All 2 Integrations	Integrations Gmail Supported Slack Supported Acuity Scheduling Supported Agiled Supported Call Loop Supported Copper Supported Dialpad Sell Supported HubSpot Customer Platform Supported Hyperise Supported LinkedIn Supported Microsoft Outlook Supported Pabbly Connect Supported Paperform Supported Rambox Supported Salesforce Supported Singer Supported Slybroadcast Supported VoilaNorbert Supported WhatConverts Supported Zoho CRM Supported Show More Integrations View All 64 Integrations
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