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We’re Just Getting Started: $35M Series C To Continue Innovation


We’re Just Getting Started: $35M Series C to Continue Innovation


They told us the WAF market was destined to remain insignificant—no technology innovations had been made in a decade. They said there was no way a new company could overtake the legacy leaders because of how entrenched they were. Besides, they said, no one cared about protecting their apps in the first place.

We knew they were wrong, and we’ve hit yet another milestone to prove it.

Today is a landmark in Signal Sciences history that’s important for our company, our customers, and the future of web security. In recognition of our continued success and revolutionary next-generation Web Application Firewall (WAF) and Runtime Application Self Protection (RASP) technologies, we’ve secured a $35 million Series C financing round led by Lead Edge Capital with participation from each of our previous investors including CRV, Index Ventures, Harrison Metal, and OATV.

Additionally, I am excited to announce that Lorrie Norrington, an Operating Partner at Lead Edge Capital, former President of eBay, and former Lead Board Director from Duo Security, has joined Signal Sciences’ Board of Directors. Lorrie brings a lifetime of leadership from market leading security, technology, and SaaS companies including Intuit, GE, Autodesk, HubSpot, McAfee, and Skyhigh to our boardroom to help in our future growth aspirations.

Since we founded Signal Sciences in 2014, we have been committed to the singular goal of redefining how the industry protects business-critical applications, APIs, and microservices, however and wherever they are deployed. While we’ve received multiple accolades and awards from both the devops and security communities validating our progress against that mission, we care most about how our customers use our products and what they say about us publicly.

Usage stats we’re most proud of to date:

  • We protect over 10,000 applications and over a trillion production requests per month.
  • 95% of our customers use our automated protection in production and not a single organization has hired a dedicated full-time employee to run the technology.
  • Our customers have Signal Sciences installed across 40 different hybrid and multi-cloud platforms.


Here are just a few of our favorite public quotes from customers:

“Signal Sciences is by far the only security product I’ve used that was not only simple to install, but also simple to use.”

“I’ve owned all security products at a Fortune 50 company and I’ve been an SVP/EVP/CTO at many different startup and midsize companies. Signal Science[s] was the first product I’ve EVER worked with that provided incredible value right out of the box.”

“From the moment it was set up, we gained powerful visibility into our application traffic without any tuning required.”

“The most advanced WAF protection available today. Signal Sciences is a truly breakthrough technology for security in the cloud era.”

Our amazing customers have shared so much public, positive feedback about our technology that we were awarded the Gartner Peer Insights Customers’ Choice award in December. In a field of over 35 WAF competitors, Signal Sciences continues to be the only WAF vendor to receive an overall 5 out of 5-star rating (and the next closest in the top 10 has a 4.6).

These are not just numbers and words to us, but a reflection of the fact that our customers trust our technology to protect the websites and mobile apps they build and rely on to connect with their customers and build their businesses. It also validates that we are establishing a new bar for what customers should expect from their WAF and security vendors. We continue to push the industry to demand more from the WAF market.

I’m so proud of what the Signal Sciences team has accomplished so far. But we’re not satisfied and we’re far from done.

We have exciting plans for the future and will be using the injection of capital to double down on innovation to continue to be the fastest growing application security company in the world. While we have the leading technology in the space today, both applications and attacks continue to evolve. We’re committed to staying one step ahead on both fronts to help keep our customers protected so they can focus on what they do best: building incredible businesses and innovating amazing web and mobile experiences.  

We have the best team who are constantly hustling to innovate, find new partners, and serve our customers, and we’ll be growing it aggressively in the coming months and years. If you or someone you know gets excited about having an impact on keeping the world’s data safer, come join us!

On behalf of the entire Signal Sciences team, we appreciate this incredible vote of confidence from our new and existing investors. We ask our customers to continue pushing us to innovate and continue to tell the rest of the industry about your amazing experiences with our team and technology. We promise to continue down our path of building the best application security company in the world!

Read the full announcement here.

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