Castle Overview

  • Year Founded
  • 2015

Year Founded

  • Status
  • Private

  • Employees
  • 30


  • Latest Deal Type
  • 2ndary - Private

  • Investors
  • 32

Castle General Information


Developer of an identity platform designed to offer end-to-end services for user security and account takeover prevention. The company's platform centralizes data analysis and real-time decisions in one location and uses APIs to detect automated credential stuffing attacks to automate the recovery process which reveals hidden links and helps identify sophisticated fraud rings, enabling organizations to protect their users' account information in a better way.

Contact Information

Ownership Status
Privately Held (backing)
Financing Status
Venture Capital-Backed
Primary Industry
Network Management Software
Other Industries
Information Services (B2C)
Systems and Information Management
Corporate Office
  • 1663 Mission Street
  • Suite 720
  • San Francisco, CA 94103
  • United States
+1 (650) 000-0000

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Castle Valuation & Funding

Deal Type Date Amount Raised to Date Post-Val Status Stage
6. Secondary Transaction - Private 000.00 Completed Generating Revenue
5. Early Stage VC 12-Sep-2019 000 000.00 Completed Generating Revenue
4. Early Stage VC (Series A) 11-Feb-2019 000.00 000.00 000.00 Completed Generating Revenue
3. Seed Round 10-Nov-2016 000 00.000 Completed Generating Revenue
2. Accelerator/Incubator 22-Mar-2016 $120K $480K 00.000 Completed Generating Revenue
1. Seed Round 01-Feb-2015 $360K $360K Completed Startup
To view Castle’s complete valuation and funding history, request access »

Castle Cap Table

Stock # of Shares
Par Value Dividend Rate (%) Original
Issue Price
Liquidation Liquidation
Pref. Multiple
Conversion Price % Owned
Series A3 000,000 00.000000 00.00 00.00 00 00.00 0.000
Series A2 000,000 00.000000 00.0 00.0 00 00.0 0.000
Series A1 2,469,469 $0.000010 $0.72 $0.72 1x $0.72 12.01%
Series A 5,300,000 $0.000010 $1.8 $1.8 1x $1.8 25%
To view Castle’s complete cap table history, request access »

Castle Comparisons

HQ Location
Total Raised
Post Valuation
Developer of an identity platform designed to offer end-to-end services for user security and account takeover preventio
Network Management Software
San Francisco, CA
30 As of 2024
000000 - 000 000.00


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0000000 0000000000 0
Addison, TX
000 As of 0000
00000000000 00.000


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0000000 0000000000 0
Austin, TX
000 As of 0000
00000 0000-00-00
00000000000 00000
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Castle Competitors (32)

Company Name Financing Status Location Employees Total Raised Last Financing Date/Type Last Financing Amount
Securonix Venture Capital-Backed Addison, TX 000 00.000 00000000000 00.000
SpyCloud Venture Capital-Backed Austin, TX 000 00000 00000000000 00000
DataDome Venture Capital-Backed Paris, France 000 000.00 00000000000 000.00
SEON (Network Management Software) Venture Capital-Backed Budapest, Hungary 000 00000 000000 - 000 00000
Human Security Private Equity-Backed New York, NY 000 00000 0000000 0000 00000
You’re viewing 5 of 32 competitors. Get the full list »

Castle Executive Team (4)

Name Title Board Seat Contact Info
Johan Brissmyr Co-Founder, Board Member & Chief Executive Officer
Sebastian Wallin Co-Founder, Chief Technology Officer & Board Member
You’re viewing 2 of 4 executive team members. Get the full list »

Castle Board Members (3)

Name Representing Role Since
Johan Brissmyr Castle Co-Founder, Board Member & Chief Executive Officer 000 0000
Sebastian Wallin Castle Co-Founder, Chief Technology Officer & Board Member 000 0000
Shardul Shah Index Ventures Board Member 000 0000
To view Castle’s complete board members history, request access »

Castle Signals

Growth Rate

0.80% Weekly
Weekly Growth 0.80%, 93rd %
-35.5%. 530%

Size Multiple

219x Median
Size Multiple 219x, 100th %ile
0.00x 0.95x. 413Kx

Key Data Points

Twitter Followers


Similarweb Unique Visitors


Majestic Referring Domains


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Castle Investors (32)

Investor Name Investor Type Holding Investor Since Participating Rounds Contact Info
Bernard Moon Angel (individual) Minority 000 0000 000000 0
Eric Berg Angel (individual) Minority 000 0000 000000 0
Jim Cyb Angel (individual) Minority 000 0000 000000 0
Jim Gochee Angel (individual) Minority 000 0000 000000 0
Ludwig Pettersson Angel (individual) Minority 000 0000 000000 0
You’re viewing 5 of 32 investors. Get the full list »

Castle FAQs

  • When was Castle founded?

    Castle was founded in 2015.

  • Who is the founder of Castle?

    Johan Brissmyr and Sebastian Wallin are the founders of Castle.

  • Who is the CEO of Castle?

    Johan Brissmyr is the CEO of Castle.

  • Where is Castle headquartered?

    Castle is headquartered in San Francisco, CA.

  • What is the size of Castle?

    Castle has 30 total employees.

  • What industry is Castle in?

    Castle’s primary industry is Network Management Software.

  • Is Castle a private or public company?

    Castle is a Private company.

  • What is Castle’s current revenue?

    The current revenue for Castle is 00000.

  • How much funding has Castle raised over time?

    Castle has raised $18.2M.

  • Who are Castle’s investors?

    Bernard Moon, Eric Berg, Jim Cyb, Jim Gochee, and Ludwig Pettersson are 5 of 32 investors who have invested in Castle.

  • Who are Castle’s competitors?

    Securonix, SpyCloud, DataDome, SEON (Network Management Software), and Human Security are some of the 32 competitors of Castle.

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