Valuation: $26.06 million Total raised to date: $46.16 million Year founded: 2015 HQ: New York
What it does: BigID offers a way for companies to find and identify their most sensitive data — helping its customers both meet privacy regulation requirements, while also giving a tool to assess the damages in the event of a breach.
Why it's hot: Data protection and privacy tools became even hotter Europe introduced its GDPR privacy regulations in May 2018. The resulting helped the company raise $30 million this year from investors like Scale Venture Partners and the investment arms of Comcast and SAP. BigID Founder and CEO Dimitri Sirota also sold his previous security startup to CA in 2013.
Kolide: a unique way to protect Macs and PCs from hackers
Valuation: $32 million Total raised to date: $9.6 million Year founded: 2016 HQ: Somerville, MA
What it does: Kolide is a cloud service that analyzes a company's Macs and PCs to find problems with devices — everything from security issues to repair needs — and suggests fixes.
Valuation: $100 million Total raised to date: $32.04 million Year founded: 2015 HQ: London
What it does: Snyk automates the process of finding and fixing vulnerabilities in open source software. In other words, it will continuously keep finding and fixing security issues in the open source code that powers much of the world's underlying computing infrastructure.
Why it's hot: This year, Snyk raised $22 million at a $100 million valuation. With open source software only getting more popular with developers, Snyk might be on to a big market.
Pindrop: Security for the next big thing in computing
Valuation: $900 million Total raised to date: $223.3 million Year founded: 2011 HQ: Atlanta, GA
What it does: Prevents telephone fraud by using artificial intelligence to identify people's voices.
Why it's hot: This company is backed by numerous big names including Martin Casado at Andreessen Horowitz and former Cisco CEO John Chambers. In December it raised an additional $90 million to expand internationally. It boasts 8 large banks and 5 large insurance companies as customers, covering more than 200 million of their accounts, the company says.
Valuation: $925 million Total raised to date: $220.04 million Year founded: 2011 HQ: San Francisco
What it does: Fastly is an edge content delivery network, or CDN. It helps its customers speed up their websites and apps load — which has the pleasant side-effect of helping detect when inbound traffic is actually an attack of some kind, and warding it off.
Why it's hot: Fastly has come on strong in this well-established market, where it competes with fellow statup Cloudflare. Fastly already powers sites such as Airbnb, GitHub, Alaska Airlines, Pinterest, Vimeo, The Guardian, and the New York Times.
It reportedly broke the $100 million revenue mark in 2017, and in 2018, Fastly raised funding that included backing by the investment arm of telecom giant Deutsche Telekom.
Illumio: busting hackers when they strike
Valuation: $1.18 billion Total raised to date: $267.5 million Year founded: 2013 HQ: Sunnyvale, CA
What it does: Illumio helps customers monitor their applications for the tell-tale signs that they've been hijacked by hackers.
Why it's hot: Illumio fast growth propelled it to "unicorn" status — startups valued at $1 billion or more — just six months after it came out of stealth mode. In 2018, the company says still grew fast, increasing its bookings (a term for revenue under contract), by 300%, it said.
HashiCorp: running, securing and connecting clouds
Valuation: $1.9 billion Total raised to date: $174.53 million Year founded: 2012 HQ: San Francisco, CA
What it does: HashiCorp is an open source cloud infrastructure automation company. For these purposes, it means that it offers tools to help developers automatically maintain and secure their cloud computing infrastructure.
Why it's hot: HashiCorp started as a passion project, but it became so popular and widespread that the creators quit their day jobs to launch a business that's now valued at $1.9 billion after only six years. Developers all over the world rely on HashiCorp's tools to secure their clouds.