ColdStack

ColdStack

ColdStack.co
Pipefire

Pipefire

M&B Marketing
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+

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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

Pipefire is a managed cold-email outreach platform for marketing agencies and other B2B service businesses. Users describe their offer, target market and location, then Pipefire finds business prospects and contact details, prepares email sequences for approval, and operates the sending workflow. The service provisions sending domains and mailboxes, warms them before campaigns begin, sends follow-ups, monitors sending health and organizes replies for review. Customers can approve campaign content and suggested replies through the web console. Outreach runs from Pipefire-managed domains rather than customers’ primary company domains. Plans bundle prospect research, domains, mailboxes, warm-up, sending and reply handling, with capacity varying by plan. Pipefire is intended for businesses selling to other businesses that want outbound email managed instead of configuring and operating separate email tools themselves.

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

Marketing agencies and B2B service businesses.

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 Supported

Screenshots and Videos

No images available

Screenshots and Videos

No images available

Pricing

No information available.
Free Version Not Supported
Free Trial Not Supported

Pricing

$497/month
Standard is $497 per month, month to month with no minimum term; it includes 10 sending domains, 20 mailboxes, managed warm-up, campaign copy, a reply inbox and deliverability monitoring. Scale is $997 per month and includes 20 domains, 40 mailboxes and twice Standard’s daily sending capacity.
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

M&B Marketing
Founded: 2018
France
pipefire.ai

Alternatives

Alternatives

emailcampaign.ai

emailcampaign.ai

Email Campaign LLC
PureMail

PureMail

PureMail LLC
PrimaryHub

PrimaryHub

Voltic

Categories

Cold Email Supported

Categories

Cold Email Supported

Integrations

Gmail Supported
Model Context Protocol (MCP) Not Supported
Slack Supported

Integrations

Gmail Not Supported
Model Context Protocol (MCP) Supported
Slack Not Supported
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