Deckdrop does investor due diligence by email. Send it a pitch deck as an attachment or a company website link, and it researches the business and replies with a clear report with referenced sources.
No account is needed, the first report is free, and results typically arrive in 10 to 15 minutes. After that it works on a pay-as-you-go basis. It is useful for angels and VC analysts screening many startups.