A gate for every connection
The office, the staff at home, the website and the factory each need their own gate.
Box 1 guards the office network. Box 2 guards staff wherever they work. Box 3 guards the website. Box 4 guards the machines in the factory. Tap a title in the diagram to jump to its companies.
Firewalls 12 companies
A firewall sits at the edge of a company's network and checks every connection between the network and the internet. It remembers each connection, so a reply from outside gets in only if someone inside asked for it. Today's firewalls also recognise applications and block known attacks.
Large firewall makers
The biggest makers of firewalls.
Palo Alto NetworksPalo Alto Networks is the largest firewall maker. It now sells a whole security platform: cloud security, security in the cloud for staff anywhere, and detection and response. It has owned CyberArk since 2026.Bengaluru · HyderabadHiring now
Firewalls for smaller businesses
Firewalls sold to small and mid-sized businesses through local IT firms.
Firewalls sold with other products
Companies that sell a firewall as part of a wider range.
CiscoCisco, the largest maker of network equipment, also sells firewalls.Bengaluru · Hyderabad · PuneHiring nowSee alsoEnterprise networking
BarracudaBarracuda sells its firewall together with its email security.BengaluruHired recentlySee alsoEmail security and anti-phishing
SophosSophos sells its firewall together with its endpoint protection.BengaluruSee alsoEndpoint security and device management
Juniper NetworksPart of HPEJuniper Networks, now part of HPE, also sells firewalls with its routers and switches.See alsoEnterprise networking
Rohde & SchwarzRohde & Schwarz makes network encryption and firewalls for European governments.See alsoChip manufacturing and test equipmentWatching the traffic inside the network
Recording and analysing the traffic that is already inside.
VehereVehere, from Kolkata, watches the traffic inside a network for signs of an attacker, and records every piece of it, so that an attack can be replayed afterwards. It also sells a firewall.Kolkata
Pert Telecom SolutionsPert Telecom Solutions sells telecom operators the systems for call tapping that a court or the government has authorised.See alsoTelecom equipment and operatorsSecurity in the cloud for staff anywhere 11 companies
Staff now work from home and the office, and the applications are in the cloud, so a firewall at the office no longer sees most of the traffic. Instead, every connection first goes to the security company's cloud. The cloud checks who the user is and connects them only to the application they need, never to the whole network. This is called zero trust, and the product is called SASE.
Security in the cloud (SASE)
Companies that check every connection in their own cloud.
ZscalerZscaler created security in the cloud for staff anywhere. Bengaluru is its main engineering site outside the United States.Bengaluru · Hyderabad · PuneHiring now
Skyhigh SecurityFormerly McAfee EnterpriseSkyhigh Security is the cloud security business that was split off from McAfee's business for companies. It is an independent company again, and has a team in Bengaluru.BengaluruHired recently
NetskopeNetskope started by watching what staff do inside cloud apps, and grew into full security in the cloud for every connection. It has engineers in Bengaluru.BengaluruHiring now
Menlo SecurityMenlo Security runs the user's web browser in its own cloud, so that nothing from a website ever runs on the laptop. This is called browser isolation. Menlo now also sells a browser of its own.BengaluruHired recently
Versa NetworksVersa Networks started with SD-WAN, software that connects offices over the ordinary internet, and grew into security in the cloud.BengaluruHiring now
AryakaAryaka runs SD-WAN and security in the cloud for its customers as a managed service.See alsoEnterprise networkingControlling what each device can reach
Splitting the network so that an intruder cannot move around.
ColorTokens Inc.ColorTokens divides a network into small sections, so an intruder who gets in cannot move from one section to the next. This is called micro-segmentation. Its engineering centre is in Bengaluru.PuneHiring now
Aruba Networking (HPE)Part of HPEAruba Networking checks each device before letting it onto the office network, and sells the SD-WAN that connects offices.Bengaluru · ChennaiHired recentlySee alsoEnterprise networkingFor one kind of user or data
The same idea, for schools, company data or virtual desktops.
SecurlySecurly sells web filtering and student monitoring for the laptops that schools hand out to students. It is engineered in Pune.PuneHiring now
ForcepointForcepoint sells security in the cloud as a way to enforce its rules about where company data may go.MumbaiSee alsoData security and privacy
Citrix Systems (R&D)Citrix is here for its secure access to virtual desktops: a desktop that runs in a data centre and appears on the user's screen.See alsoVirtual desktops (VDI) and digital employee experienceProtection for websites 5 companies
All traffic to the company's website first passes through a network run by a security company. The network absorbs floods of fake traffic that try to knock the website over (DDoS attacks), and checks every request for attacks and bots.
Akamai TechnologiesAkamai runs one of the two largest global networks that protect websites. Its security business, which stops floods of traffic and bots, is now bigger than its original business of delivering web content. One of its largest centres is in Bengaluru.BengaluruHiring now
F5F5 made the hardware that sat in front of applications in the data centre, and now sells the same protection as a cloud service. Its main India centres are in Hyderabad and Bengaluru.Hyderabad · BengaluruHiring now
CloudflareCloudflare runs the other of the two largest networks that protect websites. It has a smaller office in Bengaluru.BengaluruHiring now
RadwareRadware, from Tel Aviv, specialises in protection against floods of traffic and attacks on applications. It has a team in Bengaluru.Bengaluru
InfobloxInfoblox already looks up website names for its customers. Every attack begins with such a lookup, so Infoblox uses the lookup to block dangerous names.BengaluruHired recentlySee alsoEnterprise networkingSecurity for factory networks 2 companies
A factory network connects machines, controllers and pumps that cannot run security software. This software finds every device on the network and controls what each one may reach. This is called OT (operational technology) security.
What's changing
The browser is becoming the front door.
Most work now happens inside a web browser, so security companies are moving their checks into the browser itself. A company browser can stop an employee from pasting company data into an AI chatbot, or from downloading a file from an unknown website.
Companies: ingrid's company map. Hiring signals: postings feed of 5 Nov 2026.