Top 13 Business Email startups

Updated: Jul 08, 2025
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These startups want to disrupt business email with AI-driven inbox management, predictive email sorting and advanced encryption features.
1
Sophos
Country: UK | Funding: $125M
Sophos develops network security and threat management products to protect organizations against malicious acts.
2
Superhuman
Country: USA | Funding: $108M
Superhuman is a software platform that weaves social insights into a workflow.
3
ContactMonkey
Country: Canada | Funding: CA$55M
ContactMonkey is an internal communications email platform helping companies create, send, and track internal comms from Outlook or Gmail.
4
Proton
Country: Switzerland
ProtonMail is an internet software company that provides an easy to use secure email.
5
Skiff
Country: USA | Funding: $14.2M
Skiff is a privacy-first collaboration platform with expiring links, secure workspaces, and password protection.
6
Spark
Country: Ireland
Fast, cross-platform email designed to filter out the noise - so you can focus on what's important. Spark is the perfect tool for businesses, allowing you to compose, delegate and manage emails directly with your colleagues - use inbox collaboration to suit your teams dynamic and workflow.
7
Axigen
Country: Romania | Funding: $4.9M
Axigen focuses on the development & distribution of innovative messaging solutions.
8
IceWarp
Country: Czech Republic
IceWarp develops complete e-mail server, collaboration and cloud storage solution.
9
SmarterTools
Country: USA
SmarterTools Inc. builds applications to help companies communicate, measure, and support their worldwide business operations.
10
Fastmail
Country: Australia
Email you can feel good about. Apps for phone and tablet. Superior spam blocking. Custom @yourchoice.com address (use your own domain). Full featured calendars. Swift, thoughtful interface. Easy-to-use email import tool.
11
Tutao
Country: Germany
Tutao provides an easy-to-use email service Tutanota that automatically encrypts all your data on your device.
12
Mailfence
Country: Belgium
Mailfence provides a secure and private Email solution that value and respect your online privacy.
13
Posteo
Country: Germany
Posteo is an innovative German email provider that is concerned with sustainability and privacy and is completely ad-free.
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Fernando Lopez
Editor: Fernando Lopez
Fernando Lopez is a senior editor for SaaStartups. He joined the company after having previously spent over three years at ReadWriteWeb. Prior to his work as a reporter, Fernando worked in I.T. across a number of industries, including banking, retail and software. Fernando graduated from the University of Buenos Aires (Computer Science). He is more-than-averagely interested in photography and can often be found with a camera slung over his shoulder. He wrote a book about pitching startups to investors. You can contact Fernando at fernandolopez(at)saastartups(dot)com