ColdStack

ColdStack

ColdStack.co
+
+

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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

Start meaningful B2B relationships. Reach out and follow up across channels with an intuitive cold email tool. Always feel confident about your deliverability. Unique algorithm based on human behavior delivers 100% messages to the main inbox. Send only to verified email addresses – automatically checked in real time. Send personalized messages people will appreciate. Follow up using the best channel. Measure campaign’s success automatically. Our AI-powered system analyzes the replies and shows how many of them were positive. Get a clear picture of how effective your strategy is.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

B2B companies

Audience

Sales teams that need a cold email solution

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

No images available

Screenshots and Videos

Pricing

No information available.
Free Version
Free Trial

Pricing

$59 per month
Free Version
Free Trial

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

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Reviews/Ratings

Overall 1.0 / 5
ease 1.0 / 5
features 1.0 / 5
design 1.0 / 5
support 1.0 / 5

Pros & Cons from Real Users

Pros

  • Nothing. Never works and even bad customer service. Honestly I did not find anything that I liked about them.

Cons

  • One of the worst services I have ever seen. Clueless support agents -- Worst and rude support agents -- No refund policy. Once trapped and you are trapped -- Product does not work and not send emails -- They have some secret logs which they always point to when emails are not going -- ZERO technical support -- Features listed but most of them do not work -- Not at all easy to use

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

ColdStack.co
Founded: 2025
United States
www.coldstack.so/

Company Information

Woodpecker
Founded: 2015
Poland
woodpecker.co

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Categories

Categories

Sales Enablement Features

Collaboration
Contact Management
Content Management
Document Management
Goals / Quota Management
Lead Management
Meeting Management
Performance Management
Presentation Management
Proposal Management
Territory Management
Training Management

Integrations

Gmail
Slack
Demio
Dubb
EmailLabs
Google Sheets
Guideflow
LeadFuze
Lyne.ai
Maildoso
Mailgun
Microsoft Exchange
Pipedrive
Pitchsail
ProspectingToolkit
RepliQ
SendGrid
Trivy
UpLead
Zapier

Integrations

Gmail
Slack
Demio
Dubb
EmailLabs
Google Sheets
Guideflow
LeadFuze
Lyne.ai
Maildoso
Mailgun
Microsoft Exchange
Pipedrive
Pitchsail
ProspectingToolkit
RepliQ
SendGrid
Trivy
UpLead
Zapier
Claim ColdStack and update features and information
Claim ColdStack and update features and information
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