Not for sale right now. Deal, Quality, and AI scores are only available on active listings.

Productivity

BlackStack

blackstack

Polar

BlackStack is a Chrome extension for saving, organizing, and reusing your best snippets, replies, and message templates across Gmail, Outlook, LinkedIn, Reddit, and other tabs. Instead of relying on

Listing status

Off market

Quality

AI report

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MRR

Asking

N/A

Buyer view

Deal opinion

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Asking multiple

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MRR

Profit margin

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30d growth

0.0%

MRR growth 30d

0.0%

Active subs

Listed since

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Customers

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Visitors 30d

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Search impressions

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Revenue / visitor

N/A

Key inputs

MRR$0.00

Revenue last 30d$0.00

All-time revenue$0.00

Asking priceN/A

Profit marginN/A

TrustMRR rankN/A

FoundedMar 16, 2026

First listedN/A

Websiteblackstack.io

Country