Cloud security companies, a list with 17 the most powerful one:
1. AppRiver
Does messaging security in the cloud. It offers SaaS-based e-mail and Web security tools that are subscription-based and include spam and virus protection, e-mail encryption and Web security. It also offers a full managed service for Microsoft Exchange.
2. Awareness Technologies
Security and DLP in the cloud is no easy feat, but Awareness Technologies has brought its SaaS-based DLP model to the channel and in just a short time has amassed a small army of channel partners ready to do DLP in the cloud.
3. Barracuda
wears many hats, and most recently it’s donned the cloud cap. The Barracuda Web Security Flex is a cloud-based offering that delivers malware protection, URL filtering and application control to networked, remote and mobile users via SaaS, gateways and agents.
4. Cloud Passage
Came out of the gate with products to manage cloud security and defend cloud servers. The Halo SVM and Halo Firewall perform server exposure assessments, monitor configuration compliance and provide network access control to secure public and hybrid cloud servers.
5. M86 Security
M86 doubles down, offering security tools that are part appliance and part cloud. With its Secure Web Service Hybrid, it takes its on-premise malware prowess and extends it into the cloud to squash malware and other Web-based threats in realtime.
6. McAfee
Now owned by Intel, McAfee has been a proponent of the cloud with its suite of security offerings. McAfee’s cloud security approach is to offer security for, in and from the cloud, and the security giant has products and services to hit each one.
7. Panda Security
Cloud Protection, a cloud-based security play delivered in a SaaS model, provides protection at the three major threat vectors: endpoint, e-mail and Web. The three-pronged approach has earned Panda praise as a cloud security leader and innovator.
8. Ping Identity
In its bid to end the madness created by too many passwords, single sign-on player Ping Identity turns to the cloud to provide federated identity for cloud and SaaS applications without getting in the way.
9. Qualys
Arms cloud providers with its next-generation Security-as-a-Service platform that takes the compliance and threat defense built into its QualysGuard portfolio of security solutions and puts a cloud spin on it. And Qualys said more cloud security plays are coming.
10. SafeNet
Been around for a while, and its Trusted Cloud Fabric is a comprehensive set of security solutions designed to give enterprises secure cloud and virtual environments through a data-centric approach that is breathing new life into the security game.
11. Sentrigo
Database security player Sentrigo turned its attention to the cloud since, well, databases power many Web applications. With its Hedgehog software, Sentrigo can monitor who is accessing the database and what is being done with that data.
12. Still Secure
With its subscription-based, ProtectPoint appliance StillSecure delivers an impressive all in one firewall, intrusion detection, antivirus and more along with round-the-clock service and expertise needed to protect your network and bring you into compliance with data security policies.
13. Syferlock
Does identity and access management with patented authentication, security and single sign-on plays to lock down access across cloud, mobile and network apps using single-factor, two-factor and multi-factor authentication without extra hardware, tokens or client software.
14. Symantec
Eliminating the need for on-site hardware and software is at the core of Symantec’s Symantec. cloud services, which secure and manage information on endpoints and are delivered via e-mail, Web and instant messaging. Symantec promises high-availability, lower TCO and increased protection in the cloud.
15. Symplified
Calling itself “the cloud security company,” Symplified offers a unified access management system built for cloud architectures of SaaS and integrates into existing infrastructure with the cloud to streamline management, reduce costs and boost security.
16. Trend Micro
SecureCloud is Trend Micro’s key management and data encryption offering that protects and controls confidential information deployed into public and private cloud environments. It uses policy-based key management to ensure compliance regulations are met through remote authentication.
17. Veracode
Veracode’s cloud-based application risk management leverages its binary code analysis, dynamic Web assessments and developer e-learning for accurate and affordable verification of application security without pricey tools or source code.
16. Watchguard
With its cloud-based Reputation Enabled Defense suite of security services, WatchGuard vaulted into the cloud to provide Web security. The services, coupled with the XTM and XCS security appliances, provide protection from viruses, malware, spyware and other Web threats.
17. Webroot
Webroot pulls out all the stops when it comes to cloud security, wheeling and dealing with a Web Security Service, E-mail Security Service and E-mail Archiving Service, all in the cloud and all with no software or hardware required for protection.

Source:
http://www.clouds360.com/security.php