Microsoft’s recent acquisition of cloud security firm Adallom for $250 million highlights the importance that cloud companies place on security.

With cloud security concerns being one of the biggest inhibitors to adoption, it is necessary for companies to prove that it is safe.

Security fears are ever present and security firms are providing important software to keep your operations secure. Many cloud specific security firms are appearing to take on the challenge of making it secure.

CBR has compiled a list of five of the main pure cloud security companies.

1. Okta

Okta is focused purely on identity management, so if anyone is inside your network, it wants to know about it and why.

It is also designed to help you to manage all your logins across your applications; this includes Salesforce, Workday, Box, SAP, Oracle, Office 365 and Google Apps. It is designed to track all of these across any device.

Some of the features include privilege provisioning from one dashboard and the ability to implement policies across devices.

Its last fundraising round raised $75 million was led by Andreessen Horowitz, Greylock Partners and Sequoia Capital. Total capital raised is now $230 million.

2. Zscaler

The company offers a product called "Direct to Cloud Network" which is designed to protect from advanced persistent threats by monitoring all the traffic in and out of your network, whether this is from on-premise software or cloud applications.

The company says it has customers that include 26 of the Fortune 50 including GE Capital and Schneider Electric.

The company’s last fundraising round raised $100 million led by TPG alongside its existing investors EMC and Lightspeed Ventures. Its total raised is $138 million.

3. Centrify

Centrify is similar to Okta in that it also focuses on identity management across devices and applications. It works by putting all users into a central database that is monitored and controlled through company policies.

Like Okta is can also provide security from wherever a person signs into your network from. It also offers a product that is specifically designed to work with Samsung Knox.

This gives devices running Knox a single sign-on option and helps to manage the devices through Centrify.

The company has raised $94 million in total through fundraising rounds.

4. Qualys

The company aims to secure your devices and web applications but importantly, it helps you to remain compliant.

Neither hardware nor software are required with the cloud-only solution. The company works by analysing threat information to try and make sure that nothing makes it into your system.

If some malware is already present on the system, it’ll give you the steps to fix it and then verify when it has been fixed.

By scanning all web apps for vulnerabilities it can help to keep your data safe. It is also planning to build a cloud-only firewall.

The company raised $91 million from its IPO.

5. Cipher Cloud

CipherCloud’s goal is to secure all the as-a-Service products that are in use. So services such as Salesforce, Chatter, Box, AWS, Gmail and Office 365 are just some of the services that it offers to protect.

Not only is it aiming to protect your data, but also your communications. The company uses encryption along with traffic monitoring, anti-virus scans and other methods to help keep your business safe.

The company has raised $80 million in funding.