About MailFrontier
MailFrontier is a company based in Palo Alto (United States) founded in 2002 was acquired by SonicWALL in February 2006. MailFrontier has raised $21.54 million across 4 funding rounds from investors including SonicWALL, NEA and Menlo Ventures. MailFrontier operates in a competitive market with competitors including Mimecast, Tessian, Cyren, Halon and TitanHQ, among others.
- Headquarter Palo Alto, United States
- SectorsTechnology
- Website mailfrontier.com
- Acquired by SonicWALL (Feb 2006)
Funding Insights of MailFrontier
MailFrontier has successfully raised a total of $21.54M across 4 strategic funding rounds. The most recent funding activity was a Series C round of $1.5 million completed in December 2005. This substantial capital infusion reflects strong investor confidence in the company's business model, growth potential, and market opportunities. The funding enables strategic expansion, product development, market penetration, and operational scaling to drive long-term value creation and competitive advantage.
- Total Funding $21.54M
- Total Rounds 4
- Last Round Series C β $1.5M
- First Round $2.01M
(Apr 2003)
- Investors Count 3
All 4 funding rounds of MailFrontier with amounts and investors; the two latest post-money valuations are shown, the rest are part of the premium plan.
| Date | Amount | Transaction Name | Valuation | Lead Investors | Investors |
|---|---|---|---|---|---|
| Dec 2005 | $1.5M | Series C | β | β | |
| Mar 2004 | $8M | Series C | β | β | β |
| Aug 2003 | $10.02M | Series B | β | β | |
| Apr 2003 | $2.01M | Series A | β | β | β |
4 investors in total: 4 institutional.
Investors in MailFrontier
MailFrontier has secured backing from 4 investors, including venture fund and institutional investors. Prominent investors backing the company include SonicWALL, NEA and Menlo Ventures.
| Investor | Description | Founded Year | Domain | Location |
|---|---|---|---|---|
Venture capital investments are offered to startups by NEA. | – | nea.com | Menlo Park, United States | |
Early-stage venture capital firm investing in AI, healthcare, and tech sectors. | – | menlovc.com | - | |
US focused VC firm | – | dfj.com | Menlo Park, United States | |
Firewall-based network security solutions are delivered for global networks. | 1991 | sonicwall.com | San Jose, United States |
Investor details for MailFrontier
The complete investor list, round-by-round participation and investor portfolios require an active premium plan.
- Complete investor list
- Round participation
- Investor portfolios
- Co-investor network
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Timeline of MailFrontier
4 dated milestones of MailFrontier across 4 years, from founding to its latest funding, stage changes and deals.
- Founded MailFrontier is founded.
- Funding First funding round of $2.0M.
- Funding Latest funding round, Series C, of $1.5M.
- Exit Acquired by SonicWALL.
Competitors of MailFrontier
MailFrontier operates in a dynamic and competitive business environment, facing competition from various established players and emerging companies in the market. The competitive landscape includes prominent companies such as Mimecast, Tessian, Cyren, Halon and TitanHQ, among others.
| Company Name | Domain | Founded | HQ Location | Total funding | Employees | Description |
|---|---|---|---|---|---|---|
| mimecast.com | 2003 | London, United Kingdom | $260.94M | 79,693 | Cloud-based email security and management solutions are provided. | |
| tessian.com | 2013 | San Francisco, United States | $182.19M | 222 | AI-driven email security solutions are delivered to prevent recipient errors. | |
| cyren.com | 1991 | Herzliya, Israel | – | 248 | Cloud-based email security and anti-spam solutions are provided via SaaS. | |
| halon.io | 2002 | Gothenburg, Sweden | – | – | Secure SMTP software is offered for email security and scripting. | |
| titanhq.com | 2003 | Galway, Ireland | $650,000 | – | Secure email gateways, anti-spam filters, and archiving solutions are delivered. | |
| vadesecure.com | 2008 | Lille, France | $121.35M | – | AI-based email security solutions are provided against threats. | |
| seculetter.com | 2015 | Seongnam-si, South Korea | $9.74M | – | Email security is delivered via static and dynamic analysis. | |
| tumbleweed.com | 1993 | Redwood, United States | – | – | Encryption-based email security, anti-spam, and managed file transfer are offered. | |
| brightmail.com | 1998 | San Francisco, United States | $35M | – | Anti-spam solutions and web filtering tools are provided for ISPs. | |
| frontbridge.com | 2002 | Los Angeles, United States | $18M | – | Coud-based secure email gateway for filtering, encryption, and archiving |
Detailed competitors of MailFrontier
The full competitor set, operating metrics and side-by-side benchmarks require an active premium plan.
- Full competitor set
- Operating metrics
- Benchmarks
- Competitive positioning
Verified entity values are shown only after access is granted.
Latest news on Mailfrontier
Complete news archive for MailFrontier
Full article history, source details, and older brand coverage require an active premium plan.
- Full article archive
- Source and publication date
- Older coverage
- Brand-specific news history
Verified entity values are shown only after access is granted.
Similar companies to MailFrontier
10 companies that operate in the same segment as MailFrontier (Cybersecurity & Data Protection), ranked by their profile score on The Company Check.
| Company | Description | Founded | Location | Total funding | Revenue | Employees |
|---|---|---|---|---|---|---|
Cloud based website security solutions | 2009 | San Francisco, California, United States | USD 332.1 M | USD 1.67 B | 4,260 | |
Cybersecurity and zero trust solutions are delivered for secure networks. | 2007 | San Jose, California, United States | USD 148 M | USD 3.35 B | 2,241 | |
Cloud-based identity management solutions are provided for enterprises. | 2002 | Denver, Colorado, United States | USD 136.89 M | USD 36.94 M | 821 | |
Ledger is recognized for providing secure cryptocurrency hardware wallets. | 2014 | Paris, France | USD 575.4 M | – | – | |
AI-based software suites are developed for navigation applications. | 1893 | Paris, France | – | USD 26.01 B | 83,020 | |
Cloud based platform offering IT operational data and security analytics software | 2003 | San Francisco, California, United States | USD 40 M | USD 2.59 M | 108 | |
Cloud-based enterprise management solutions including backup and recovery are provided. | 2003 | Singapore, Singapore | USD 658 M | – | – | |
Cloud-based identity management and authentication are provided for enterprises. | 2009 | San Francisco, California, United States | USD 231.3 M | USD 2.92 B | 5,910 | |
Cloud and application performance management platform is provided. | 2010 | New York, New York, United States | USD 147.19 M | USD 2.68 B | 6,500 | |
Identity security solutions are provided to secure identities across infrastructures. | 1999 | Petah Tikva, Central District, Israel | USD 59 M | USD 1 B | 3,790 |
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Frequently Asked Questions about MailFrontier
MailFrontier was founded in 2002 and raised its 1st funding round 1 year after it was founded.
MailFrontier is headquartered in Palo Alto, United States. It is registered at Palo Alto, California, United States.
MailFrontier is a funded company, having raised a total of $21.54M across 4 funding rounds to date. The company's 1st funding round was a Series A of $2.01M, raised on Apr 2003.
Founded in 2002 in Palo Alto, United States, MailFrontier operated in the email security and compliance sector. Appliance-based solutions were developed to protect enterprises from inbound and outbound threats, including spam, viruses, and phishing. Policy enforcement and regulatory compliance controls were also implemented. Over 1,700 customers were served by the time of its 2006 acquisition by SonicWALL. Recognition as a visionary in email security was received from Gartner in 2005.
MailFrontier has 4 investors. Key investors include SonicWALL, NEA, Menlo Ventures, and DFJ.
Yes. MailFrontier was acquired by SonicWALL in February 2006.

