ColdStack

ColdStack

ColdStack.co
PureMail

PureMail

PureMail LLC
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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

PureMail provides managed Google Workspace and Microsoft 365 email inboxes for teams running cold-email outreach. Customers supply their own domains and select an inbox volume; PureMail provisions mailboxes, configures SPF, DKIM, DMARC and MX records, and connects accounts to sending platforms such as Instantly, Smartlead, Lemlist and other sequencers. Plans are billed monthly per inbox, with volume-based rates, DNS setup and integration included and no setup fee. Accounts include mobile and web access, while support is available through dashboard tickets. PureMail is intended for lead-generation agencies, B2B sales teams, SDRs, founders and other outbound teams that need multiple business email inboxes. The company also publishes a cold-email tool directory with provider pricing, sending limits and rubric scores.

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

Lead generation agencies, B2B sales teams, SDRs and founders running cold email outreach at scale who need many Google Workspace or Microsoft 365 inboxes

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 Not Supported

API

Offers API Not Supported

API

Offers API Not 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

$33/10 emails
USD, billed monthly and auto-renewing: $3.30/inbox for 10 inboxes, $3.10/inbox for 30–100, and $2.90/inbox for 101+. 10-inbox minimum. DNS setup and sending-tool integration are included; no setup fee. Cancel before renewal.
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:

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Reviews/Ratings

Overall 4.8 / 5
ease 4.9 / 5
features 4.8 / 5
design 4.0 / 5
support 4.9 / 5

Pros & Cons from Real Users

Pros

  • Powers cold email infrastructure across 15+ client accounts for our agency. Reliable batches, consistent quality, and the setup handling saves us hours per new client onboarding process.
  • Order turnaround is quicker than other providers ive used before. Full batch of inboxes ready within a day compared to the multi day wait other services put me through.
  • 800+ inboxes across enterprise sales operations through puremail. Support scales with account size, provisioning stays fast, quality holds consistent across the fleet at all times. Rare vendor experience at this scale.
  • First infrastructure purchase for cold email. Puremail made it approachable with clear pricing, straightforward setup, patient answers to basic questions. Rare for a vendor to treat newcomers as first class.
  • Grew our inbox count 8x in a year through puremail without quality dropping or support degrading. Vendor scaled with us instead of becoming the bottleneck as we hit new order sizes.

Cons

  • Agency workspace view for multiple client account groups would be a great addition.
  • Initial domain setup for first order took a few extra hours of back and forth to get right.
  • Dedicated enterprise account manager relationship would be nice.
  • Cold email 101 resource in the dashboard would help newcomers.
  • Quarterly volume reports per inbox would help capacity planning.

Training

Documentation Not Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Not 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

PureMail LLC
Founded: 2025
United States
puremail.ai

Alternatives

Alternatives

PrimaryHub

PrimaryHub

Voltic

Categories

Cold Email Supported

Categories

Cold Email Supported

Integrations

Gmail Supported
Instantly Not Supported
Slack Supported
Smartlead.ai Not Supported
lemlist Not Supported

Integrations

Gmail Not Supported
Instantly Supported
Slack Not Supported
Smartlead.ai Supported
lemlist Supported
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