Top 16 email security startups you should know in 2025

What are email security startups?

Email security startups keep the focus on building specialized tools that catch advanced phishing scams, stop malicious attachments, block account takeover attempts, and spot fake emails pretending to be from your boss or coworkers, stuff that regular spam filters often miss. Since cybercriminals get more creative with their attacks, these startups stay one step ahead by constantly updating their security methods and finding new ways to protect your inbox.

Top email security startups

Complete list of the most email security startups that are worth knowing:

Mimecast

Founded in 2003, Mimecast provides email security and management tools for organizations in the cloud. Their software protects against spam, malware, impersonation attacks and more while also archiving email data.

Mimecast scans incoming email connections and content using threat intelligence that stays continually updated. This allows it to detect emerging, zero-hour schemes in real time. Suspicious emails are isolated so they can be analyzed without impacting employee inboxes.

Perception Point

Founded in 2015, Perception Point offers security solutions that proactively protect against threats in email, messaging, and other communication channels. As a startup currently in stealth mode, Perception Point is developing technology for real-time detection and response to targeted attacks like business email compromise scams, ransomware, and phishing.

By deeply analyzing sender patterns and content, Perception Point aims to automatically identify emerging communication threats and prevent them before damage occurs. Their systems will evaluate contextual clues to spot risky emails and messages that may sneak past traditional security filters. Proprietary machine learning will enable Perception Point to stay ahead of the latest patterns cybercriminals use for exploitation.

Tessian

Founded in 2013, Tessian is a company that makes email security software powered by artificial intelligence. Their platform helps stop sensitive emails from being misaddressed or sent to unauthorized people by mistake.

Tessian’s software integrates with email systems like Outlook and Gmail to analyze outgoing messages in real time. Using machine learning trained on billions of emails, it can detect when an email contains risky content or is improperly addressed. The software will prompt the sender to double-check or stop the send.

Redsift

Founded in 2015, Redsift is a cybersecurity company that offers anti-phishing solutions to protect against email attacks. Their platform integrates with popular services like Gmail and Salesforce to visualize business communication data in real time.

Key products include OnInbox, which analyzes inbox traffic and scans for deceptive messages, and OnDMARC, which enforces email authentication standards to prevent spoofing. Together, these tools aim to stop phishing attacks using detailed analytics on known threats and patterns.

ValiMail

Founded in 2015, ValiMail offers email validation and authentication platforms to stop phishing attacks and fraud. Their cloud-based software verifies real emails from organizations while identifying spoofing attempts.

When employees or customers receive fake login or payment emails, disastrous data breaches can occur. ValiMail sits between organizations and recipients to authenticate all outgoing email. This protects brands from impersonation while giving users a trusted inbox.

Skiff

Founded in 2020, Skiff is an email and workspace platform built for security through end-to-end encryption. Unlike most email providers, Skiff messages can only be read by the intended recipient – not even Skiff can access the content.

In addition to encrypted email, Skiff offers a suite of productivity tools like calendar, docs, and drive. Everything is protected by default to give peace of mind when working remotely or sending sensitive data.

Coro

Founded in 1942, Coro provides cybersecurity tools tailored for small and medium businesses (SMBs) that typically lack resources for full security teams. Their platform gives business owners powerful protection without needing deep technical expertise.

Features like antivirus, endpoint detection, email security, and patch management come pre-configured to install quickly. Remote monitoring highlights risks like compromised employee devices or suspicious logins. Coro also trains employees on safe practices through simulated phishing attacks to boost readiness.

Reality Defender

Founded in 2021, Reality Defender offers technology that detects deepfakes – fake audio, video, and images made using AI. Companies use their platform to catch false user accounts and fraudulent content. As tools make it easier to manipulate media, deepfakes threaten to erode trust.

Reality Defender combats this by spotting subtle clues when files have been artificially generated or altered. Their algorithms excel even at catching new manipulation methods. Reality Defender helps safeguard firms against scams and impersonation attempts involving synthesized data. Their deepfake identification restores authenticity in customer interactions and verified content sharing.

Twenty

Founded in 2023, Twenty is an open-source customer relationship management (CRM) software designed for large businesses. As an open-source platform, Twenty offers free use, customization, and integration to fit a company’s sales and marketing processes.

Twenty delivers core CRM functionality like lead and contact management, email marketing, forecasting reports, and analytics. It also allows deep customization of fields, layouts, dashboards plus integration with other enterprise software as needed.

Syfe

Founded in 2019, Syfe is an online investment platform that aims to provide more transparency, personalization, and results for investors compared to traditional wealth managers. The Syfe system uses algorithms to develop customized portfolios tailored to each client’s financial situation and goals.

Investors complete a questionnaire about their risk tolerance, timeline, and objectives. Syfe then crafts a diversified portfolio combining stocks, bonds, and real estate. The platform also offers complete visibility into all investments. Users can log in anytime to view detailed performance charts on their personal portfolios. Syfe provides analysis and commentary on market moves and rebalancing decisions to educate investors.

CommBox

Founded in 2013, CommBox is a customer service platform that uses artificial intelligence to automate interactions across different digital channels like messaging, chat and social media. Their omnichannel software aims to transform customer support from the traditional call center model to flexible self-service options.

The CommBox system can understand customer questions submitted through various platforms and respond with accurate answers instantly. This automates routine inquiries to save human agents time. An AI assistant handles common requests while tapping human agents when necessary.

Malwarebytes

Founded in 2008, Malwarebytes is a cybersecurity company that offers virus protection and anti-malware software for home users and businesses. Their products aim to catch sophisticated threats and ransomware that might be missed by standard antivirus tools.

Consumers can use Malwarebytes to scan Windows and Apple computers for hidden infections that evade basic defenses. Their software identifies and quarantines hard-to-detect malware before it puts sensitive data at risk. For enterprise customers, Malwarebytes provides endpoint monitoring and detection across networks to stop stealthy attacks.

Resend

Founded in 2023, Resend offers an email platform optimized for developers to send high volumes of transactional messages. Unlike normal email tools focused on marketing, Resend provides API capabilities to integrate notifications and alerts into apps and systems with ease.

The Resend infrastructure allows flawless deliverability for order confirmations, password changes, onboarding sequences, and other transactional use cases that underpin digital services. Robust API endpoints handle inputs and data to trigger and customize responsive emails at scale.

Cisco

Founded in 1984, Cisco has grown quickly by selling equipment integral to enterprise IT and the web. Their routers direct internet traffic so efficiently that over half of the world’s web transactions pass through Cisco gear. Beyond workplace networks, Cisco technology enables services like video conferencing, streaming entertainment, smart cities, and self-driving vehicles.

Cisco provides cybersecurity software and services in addition to networking. Their portfolio helps customers combat threats when connecting people, processes, data, and devices. Cisco’s end-to-end platforms aim to secure everything from data centers to mobile users logging in from home.

Concentric AI

Founded in 2018, Concentric AI is an artificial intelligence company focused on data security. They sell a data security posture management (DSPM) platform that uses AI to automatically discover, classify, and protect sensitive information across an organization’s systems.

Their Semantic IntelligenceTM engine is the core technology that powers the capabilities of the platform. It leverages deep learning techniques to deeply understand data context the way a human would. This allows it to identify risky data such as credit card numbers or health records and ensure policies are applied correctly.

Trend Micro

Founded in 1988, Trend Micro is a major cybersecurity firm that provides software to protect against email threats among other solutions. Founded in 1988, they are an industry pioneer in using a blend of the latest and proven security techniques.

For email protection specifically, Trend Micro detects phishing attempts, spam, malware and more that gets sent to employee inboxes. They scan contents using a mix of threat intelligence databases, machine learning, sandbox emulations, and data loss prevention filters.

Conclusion

Smart businesses are making these new security solutions part of their overall marketing strategy. After all, showing customers that you take their data security seriously is a pretty strong selling point. These new players in the security game are doing something right, as more businesses wake up to the fact that their old spam filters just aren’t cutting it anymore. With hackers getting trickier by the day, it looks like these startups picked the perfect time to shake things up in the world of email security.