Stops bots and account abuse across apps and APIs using behavioral signals and real-time mitigation.
Buy
Sign up to view historical trading trends and place an offer.
Sell
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Overview
Castle provides a security platform designed to detect and thwart automated bots, fraudulent account activity, and scripted abuse across web, mobile, and API channels. The system applies real-time behavioral analysis, device and signal intelligence, and no-code policies to stop threats before they impact users.
Buy
Sign up to view historical trading trends and place an offer.
Sell
Understand share pricing, list anonymously, and benefit from transparent fees.
Investors
First Round Capital
Index Ventures
F-Prime Capital
Y Combinator
Castle Valuations & Financials
View real-time NPM data on Castle stock including daily Castle stock price estimates, valuation history, and historical share price information. Access Castle financing rounds, secondary trade levels, cap table data, and private company comparable transactions. Use NPM's private company valuation database to track Castle pricing across six independent market signals. Looking for private company due diligence data sources on Castle? Get in touch to learn more.
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FAQ
We have answers
Castle stock does not trade on public stock exchanges. Castle stock is considered a private security and you need to be an accredited investor to trade shares. To invest in Castle stock you can either buy shares directly through the company or work with a secondary trading marketplace like Nasdaq Private Market.
Learn more about the secondary market for private company shares on the investors page.
Castle Stock does not trade on public stock exchanges. In order to sell Castle shares you need to work directly with the company or with a secondary trading marketplace like Nasdaq Private Market. NPM has more than a decade of experience helping sell shares on the private market to our network of institutional investors.
Learn more about NPM services for selling privately held stock on the Employee Shareholders page.
Read more about how to sell private company stock on the private secondary market:
Castle does not have a publicly available stock price because it is privately held and not traded on public stock exchanges. Through the NPM Data and Intelligence database from Nasdaq Private Market, you can view Castle share price and other valuable private market data.
Read more about secondary market private company stock prices:
There is no ticker symbol for Castle stock because it is a private company. Private companies do not have ticker symbols like public companies, they are identified primarily by using the company ‘street’ name or legal name.
Nasdaq Private Market currently works with employees, ex-employees, and other company investors. In order to sell Castle stock you need to receive the company’s approval, which Nasdaq Private Market manages on your behalf.
Learn more about selling privately held stock on the Employee Shareholders page.
Read more about how to sell shares of a private company and eligibility for selling privately held stock:
Currently, Nasdaq Private Market only works with accredited entities and institutional investors to purchase private company stock. In order to invest in Castle stock, you need to be an accredited entity or institutional investor.
Learn more about the Nasdaq Private Market tool kit for investors on the Investor Trading page.
Once you buy or sell, stock share ownership must transfer before funds are wired. With Nasdaq Private Market, clients leverage our patent-pending Transfer and Settlement technology which streamlines and manages transfer activity from match to settlement.
To learn more about private company stock Transfer and Settlement, check out the Transfer and Settlement page.
Castle is a private company and has not had an IPO. There is currently no Castle IPO price. Get started to begin exploring the Nasdaq Private Market Data and Intelligence database and gain access to actionable data related to Castle IPO.
Learn more about Data and Intelligence private company stock data for institutional investors on the on the NPM Data and Intelligence Product Page.
