Inboxbooster provides free unlimited email placement tests and step-by-step remediation guidance to help businesses get messages out of spam folders and into the primary inbox. The product queries spam filters, analyzes content and delivery infrastructure, and produces personalized fixes such as removing trigger words, changing URL formats, or addressing domain and sending-IP reputation issues. It is built on a dataset of 100 million emails and evaluates delivery across providers including Gmail, Outlook and Yahoo. Inboxbooster works with email senders, email service providers and marketing platforms to resolve deliverability problems. The company has over 2,000 customers, including Y Combinator, Zengo and Wizbii, and was founded by Nicolas Toper and Marcus Engene. It launched from stealth and is based in San Francisco, CA.

Total raised

$1M

Funding rounds

1

Latest round

Equity

Latest activity

Apr 2023