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

ReachInbox is an AI‑powered cold email outreach platform built to help businesses scale campaigns, maximize deliverability, and centralize communication, enabling users to connect unlimited email accounts with automatic DKIM/SPF/DMARC setup, warmup, and auto‑rotation to avoid spam, AI‑driven magic email copy and sequence generation, along with intelligent spintax and AB testing for highly personalized outreach, comprehensive analytics dashboards, and integrated open/link tracking, bounce detection and reputation protection; it offers a unified Onebox inbox for managing replies, auto‑reply detection with conditional logic to pause or trigger follow‑ups, dynamic CC/BCC inclusion capabilities, customizable campaign settings including daily send limits, unsubscribe headers and block‑quote follow‑ups, and variables that auto‑map CSV columns for personalization.

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

Startups and growth teams wanting a tool to streamline and scale multichannel cold outreach with AI-generated sequences, deliverability safeguards, and centralized conversation management

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

$30 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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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
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

ReachInbox
United States
reachinbox.ai/

Alternatives

Alternatives

Rubedo

Rubedo

Rubedo.ai

Categories

Categories

Integrations

Gmail
Slack
Clay
Google Sheets
HubSpot CRM
Microsoft Excel
Microsoft Outlook

Integrations

Gmail
Slack
Clay
Google Sheets
HubSpot CRM
Microsoft Excel
Microsoft Outlook
Claim ColdStack and update features and information
Claim ColdStack and update features and information
Claim ReachInbox and update features and information
Claim ReachInbox and update features and information