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Startup · United Kingdom

CSignum

HQ Bathgate, United KingdomFounded 202011-50 employees

Revolutionising underwater communications with electromagnetic technology for seamless data integration between surface & submerged devices.

Startup
WebsiteLinkedInX
Total raised
£9.6M
3 rounds
Last round
£2.6M
Stage undisclosed · Sep 23, 2026
Products
3

Products3

EM-2

A wireless communications system for sensor data through water and ground.

Maturity not rated

EM-2Q

A wireless communications system for water-quality monitoring.

Maturity not rated

EM-2S

A wireless communications system for ship-hull monitoring sensors.

Maturity not rated

Newest unveiled first. Open a product for its milestone timeline, components and sources.

Funding3 rounds · £9.6M

Disclosed
£9.6M
Latest
£2.6MStage undisclosed · Sep 23, 2026

Totals add known amounts using recorded USD conversions where available; other currencies are shown separately. A ~ marks an estimated amount.

Sources10

Profile4

  1. 1
    DatabaseCSignum - PitchBook company profile

    PitchBook · Supports Organization · employee range, Organization · founded year, Organization · linkedin url, Organization · x url

    “employee_range: 11-50 (profile: 29)”
  2. 2
    DatabaseSixth-Domain public startup directory

    Sixth-Domain · Supports Organization · country, Organization · kind

    “{"country": "UK", "hq_iso2": "GB", "id": "d1a1d40e-f17f-46ba-9701-98d05dd480f0"}”
  3. 3
    DatabaseCSignum - Crunchbase company profile

    Crunchbase · Supports Organization · employee range, Organization · hq city, Organization · linkedin url, Organization · x url

    “employee_range: 11-50 (profile: 11-50)”
  4. 4
    DatabaseCSignum - LinkedIn company profile

    LinkedIn · Supports Organization · employee range, Organization · founded year, Organization · hq city, Organization · linkedin url

    “employee_range: 11-50 (profile: 11-50 employees)”

Products1

  1. 5
    CompanyCSignum - Wireless Through Water, Ice and GroundExpandExpandExpandToggle MenuTagsTagsTagsTagsLinkedinScroll to topScroll to topExpandExpandExpand

    CSignum · Supports Organization · description, Organization · name, Organization · website, System

    “Revolutionising underwater communications with electromagnetic technology for seamless data integration between surface & submerged devices.”

Funding5

  1. 6
    CompanyCSignum secures £6M to transform underwater wireless networks

    CSignum · Apr 22, 2025 · Supports Funding round, Funding round · amount

    “The funding round was led by Archangels, Par Equity, and Scottish Enterprise”
  2. 7
    NewsCSignum Raises £6M in Series A Funding

    FinSMEs · Apr 22, 2025 · Supports Funding round · amount

    “raised £6M in Series A funding”
  3. 8
    CompanyCSignum Secures £1 Million of Funding to Transform Underwater and Underground Sensor Networking

    CSignum · Mar 6, 2024 · Supports Funding round · amount

    “has announced £1 million of additional funding from a consortium of US investors”
  4. 9
    NewsCSignum raises £2.6M to send data through water, ice and ground

    Dealroom News · Supports Funding round · amount

    “has raised £2.6 million in early-stage funding”
  5. 10
    NewsScottish scale-up confirms new CEO to lead next phase of commercial growth

    Envirotech Online · Supports Funding round

    “has completed a £2.6 million funding round”

Each fact on this page is attached to the sources that support it. Archived copies are linked when we keep one.