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

Developer Tools

OpenInbox

openinbox

Polar

openinbox.io — Instant disposable inboxes + API for receiving emails safely openinbox.io lets you generate a temporary email inbox in seconds — no signup — to receive messages, verifications, or feed

Listing status

Off market

Quality

AI report

—

MRR

$26

Asking

N/A

Buyer view

Deal opinion

N/A

Asking multiple

N/A

MRR

$26

Profit margin

N/A

30d growth

40.3%

MRR growth 30d

70.0%

Active subs

Listed since

N/A

Customers

N/A

Visitors 30d

2,008

Search impressions

N/A

Revenue / visitor

$0.0146

Key inputs

MRR$25.50

Revenue last 30d$29.25

All-time revenue$50.10

Asking priceN/A

Profit marginN/A

TrustMRR rank3,528

FoundedFeb 7, 2026

First listedN/A

Websiteopeninbox.io

CountryN/A