Castor

Picture of the castor team
Castor logo

Castor reinvents the way companies find and understand their way around data.

Data within companies has grown exponentially, the challenge for users is no-longer "do I have the data I need", but what data they should be using and how.  Castor is building the data discovery and collaboration platform for business users, ensuring they can be truly data-driven.

Castor, based out of Paris, was founded by four data scientists, Tristan Mayer, Xavier de Boisredon, Arnaud de Turckheim and Amaury Dumoulin. Two of whom had previously seen challenges first-hand as the Heads of Data at french unicorns Payfit and Qonto.

Enterprise SaaS

Investment Total
Blossom led Castor's $23.5M Series A round. Acquired in 2025 by Coalesce.

More Series A investments

Moonpay provides a fiat to crypto on-ramp, enabling merchants to offer customers the ability to exchange fiat-to-crypto currency immediately.

Infrastructure / Crypto

Profile image of Ivan Soto-Wright from Moonpay
  1. Country:
    Remote
  2. Sector: 
    Crypto
  3. DAte of partnership: 
    Sept 2021
Blossom invested prior to Moonpay's $555M Series A with Tiger Global, Coatue, Thrive, Paradigm, and NEA.
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Checkout’s mission is to build the future of commerce by building by a full stack technology that offers access to a payment gateway, advanced risk and fraud monitoring tools, a cutting-edge processor and the relevant acquirers, all in unified payments solution.

Infrastructure / Fintech

Guillaume Pousaz profile image from Checkout.com
  1. Country:
    UK
  2. Sector: 
    Financial Services
  3. DAte of partnership: 
    Apr 2019
Blossom invested in Checkout’s $230M Series A alongside DST Global and Insight Partners. Checkout has since gone on to raise their $150M Series B, $450M Series C and $1B Series D.
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Pigment offers an intuitive, visually-driven experience to forecast the future of your business. With flexible parameters and continuous forecasting, Pigment brings future scenarios to life through charts, models and simulations.

SaaS / Fintech

Romain Niccoli and Eléonore Crespo profile from Pigment
  1. Country:
    France (Paris)
  2. Sector: 
    Enterprise SaaS
  3. DAte of partnership: 
    Jul 2020
Blossom led Pigment’s $26M Series A round. Pigment has since gone on to raise $145M in a Series D funding round, led by ICONIQ Growth.
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Tines makes the lives of security and operations teams on the frontlines easier through advanced, contextually aware automation. Connect to any REST API or web application in seconds.

SaaS / Security

Eoin Hinchy and Thomas Kinsella profile from Tines
  1. Country:
    Ireland
  2. Sector: 
    Cybersecurity
  3. DAte of partnership: 
    Jul 2019
Blossom led Tines’s $4.1M Series A. Tines has most recently raised a $125M Series C from Goldman Sachs.
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Maki is building a conversational AI agent that liberates HR teams.

SaaS / HR

  1. Country:
    France (Paris)
  2. Sector: 
    Enterprise SaaS
  3. DAte of partnership: 
    Jan 2024
Blossom led Maki's $28.6M Series A
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Qantev enables insurers to automate claims operations, reduce leakage, improve loss ratios, enhance data quality, and elevate customer experience.

Fintech

  1. Country:
    France
  2. Sector: 
    Enterprise SaaS
  3. DAte of partnership: 
    OCT 2024
Blossom led Qantev's €28.5M funding round
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