🦊/Investors

ACT Venture Capital

Venture capital

Dublin · Seed–Growth · 11 people tracked

Find your way into ACT Venture Capital

965 people in our graph share verified history with the ACT Venture Capital team — schools, employers, funds. One of them is your warm intro.

Tobi Cokerunlockedknows Conor Mills · together at Kauffman Fellows (overlapped)
×9knows the team · via Kauffman Fellows
×2knows the team · via Trinity College Dublin
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Investment thesis

ACT Venture Capital is an independent Irish venture capital firm that invests €1 million to €15 million in growth-stage private companies, with capacity for larger commitments through syndicated rounds.

Source: firm website, verified Aug 7, 2026.

Stage
Seed–Growth
Check
$1.1M – $16.2M
HQ
Dublin, IE
Instruments
Equity
Founded
1994
AUM
$648M
Tracked investments
54
Acquisitions
1

Team · 11 people

from the firm's website & curated
John O'Sullivan· General Partner

What they invest in

from 31 of 54 portfolio companies

AI & Machine Learning ×15Enterprise Software ×12SaaS ×11Data & Infrastructure ×6Deep Tech ×6Hardware ×6Cybersecurity ×4Fintech ×4

HQs:Ireland×19United Kingdom×2Kenya×1

Who they back

founder profiles across 14 portfolio companies
57%
solo founders
8 of 14 mapped founding teams
55%
repeat founders
of 11 founders with career history

Founding team size:solo founder×82 founders×53 founders×1

Where their founders studiedfrom 13 founders with education data

University of Limerick ×3Dublin City University ×2Technological University Dublin ×2Trinity College Dublin ×2University College Dublin ×2

What their founders studiedfrom 13 founders with field-of-study data

Business & Management ×5Computer Science ×4Design & Architecture ×2Engineering ×2Mathematics & Statistics ×2Physics ×2

Investments · 54 tracked

founders shown can be your intro path
Akara Liveactventure.capitalin𝕏
Alpha Wirelessalphawireless.comin

Alpha Wireless manufactures wireless antennas and telecommunications cabinets for telecom infrastructure operators and network deployment specialists.

Enterprise SoftwareHardwareIoTPortlaoise, IE

Fergal Lawlor(Chief Executive Officer)in

Co-investorsAct Venture Capital

AQMetricsaqmetrics.comin𝕏

AQMetrics provides investment compliance software that automates ongoing monitoring of ownership structures, investment limits, and portfolio risk for financial institutions.

Data & InfrastructureEnterprise SoftwareFintechLegalTechSaaSDublin, IE

Geraldine Dautun(Founder)in

Co-investorsAct Venture CapitalFrontline Ventures

Cesantacesanta.comin𝕏

Cesanta develops embedded networking software and IoT device management solutions, including firmware frameworks and cloud platforms for connected products.

Developer ToolsHardwareIoT

Anatoly (Toly) LebedevSergey Lyubkain

Co-investors500 GlobalAct Venture Capital

ChannelSightchannelsight.comin

ChannelSight provides a Where To Buy solution that directs online shoppers to the nearest retailer with product inventory in stock, integrating directly into brand websites and product pages.

Data & InfrastructureE-commerceMarketing TechRetail TechSaaS

John Beckett(Founder)in

Co-investorsAct Venture CapitalLiquidity CapitalNauta CapitalEnterprise Ireland

CitySwiftcityswift.comin𝕏

CitySwift is an Irish big data company providing a performance optimization platform to bus network operators worldwide, delivering actionable insights to improve operational efficiency, reliability, and passenger experience.

AI & Machine LearningData & InfrastructureLogistics & Supply ChainMobility & Transportation

Brian O'Rourkein

Co-investorsAct Venture CapitalGresham House VenturesWestern Development Commission

Decawavedecawave.com

Decawave developed Ultra-Wideband (UWB) technology, including UWB integrated circuits, modules, and evaluation kits, some compatible with Apple's U1 chip.

HardwareIoTSemiconductors

Co-investorsAct Venture CapitalKernel CapitalWestSummit CapitalAtlantic Bridge Ventures

Deciphexdeciphex.comin𝕏

Deciphex develops AI-powered platforms to enhance pathology efficiency, including digital image analysis, clinical trial support, and a global network of subspecialty pathologists.

AI & Machine LearningDigital HealthHealthtechMedical Devices

Co-investorsAct Venture CapitalClaret Capital PartnersMolten VenturesSeroba Life Sciences

Eblana Photonicseblanaphotonics.com

Eblana Photonics designs and manufactures laser diodes and photonic solutions for sensing, LIDAR, spectroscopy, and telecommunications applications across the infrared spectrum.

Deep TechHardwareSemiconductorsDublin, IE

Dr. James O'Gorman(Founder)Prof. John Hegarty(Founder)

Co-investorsAct Venture Capital

EdgeTieredgetier.comin

EdgeTier provides AI-powered software that analyzes customer interactions in real time to identify issues and their root causes for contact centers and customer experience teams.

AI & Machine LearningEnterprise SoftwareSaaSDublin, IE

Shane(Chief Executive Officer / Co-Founder)inCiarán(Chief Technical Officer / Co-Founder)in

Co-investorsAct Venture CapitalEpisode1

Ekcoek.coin𝕏

Ekco provides cloud and security solutions for enterprise customers, with operations in the UK and Ireland.

Cloud ComputingCybersecurityEnterprise SoftwareDublin, IE

Eoin Blacklock(Founder)in

Co-investorsAct Venture Capital

Greyscoutgreyscout.comin𝕏

GreyScout provides technology and services to help brands protect their intellectual property and distribution channels from counterfeit and grey market activity.

E-commerceMarketing TechMarketplaces

Co-investorsAct Venture CapitalFurthr VC

Gridbeyondgridbeyond.comin𝕏

GridBeyond develops a technology platform that manages distributed and flexible energy resources for industrial, commercial, utility, and institutional organizations worldwide.

AI & Machine LearningCleantechEnergyEnterprise SoftwareIoTSaaSCork, IE

Michael Phelan(CEO)inPadraig Curran(CTO & Co-Founder)Richard O'Loughlin(Deputy CEO)in

Co-investorsEnergy Impact PartnersConstellationMirovaSamsung VenturesAct Venture CapitalClaret Capital Partners+2 more

Keelvarkeelvar.comin

Keelvar is an AI-native advanced sourcing optimization platform that helps enterprises automate and optimize procurement processes by matching buyers and suppliers fairly using intelligent algorithms.

AI & Machine LearningB2B MarketplacesEnterprise SoftwareSaaSCork, IE

Alan Holland(Founder & CEO)in

Co-investors83NorthAct Venture CapitalEnterprise EquityMosaic VenturesSquareOneNew Enterprise Associates (NEA)

Lativelative.ioin𝕏

Lative is an AI-native platform for go-to-market (GTM) planning and decision intelligence that unifies sales strategy with execution by connecting marketing intelligence to sales operations.

AI & Machine LearningSaaS

Co-investorsAct Venture CapitalSenovoEnterprise IrelandWestWave Capital

Lime Microsystemslimemicro.comin𝕏

Lime Microsystems designs field-programmable RF transceivers and software-defined radio silicon for wireless broadband infrastructure and adjacent applications.

Deep TechHardwareSemiconductorsLondon, GB

Ebrahim Bushehri(Chief Executive Officer)in

Co-investorsAct Venture Capital

Mad Memad-me.comin

mAdme provides a cloud-native customer engagement platform built specifically for telecommunications service providers, combining on-device intelligence, campaign orchestration, and actionable insights.

AdTechAI & Machine LearningData & InfrastructureEnterprise SoftwareMarketing Tech

Co-investorsAct Venture CapitalDelta Partners

Micron Agritechmicronagritech.comin𝕏

Micron Agritech develops portable pen-side diagnostic devices for animal health testing, enabling rapid diagnostics for farmers and veterinarians.

AgTechAI & Machine LearningHealthtechMedical DevicesDublin, IE

Daniel Hijazi(CEO)in

Co-investorsAct Venture CapitalAtlantic Bridge VenturesThe Yield Lab EuropeEnterprise IrelandThe Yield Lab

Oblivious Acquiredoblivious.comin𝕏

Oblivious builds privacy-enhancing software that enables organizations to perform secure data collaboration and deploy services while maintaining data sensitivity.

AI & Machine LearningCybersecurityData & InfrastructureEnterprise SoftwareDublin, IE

Jack Fitzsimons(Co-founder)Robert Pisarczyk(Co-founder)in

Co-investorsAct Venture CapitalAcurio VenturesAtlantic Bridge VenturesCavalry VenturesExpeditionsFirestreak Ventures+2 more

Plasma Boundplasmabound.comin𝕏

Plasma Bound, a spin-out of University College Dublin, develops Controlled Polymer Ablation (CPA) surface-engineering technology for bonding lightweight structural assemblies.

Advanced ManufacturingDeep TechNew MaterialsDublin, IE

Alan Barry(CEO & Co-Founder)inXavier Montibert(Commercial Director & Co-Founder)inDr. Nick Barry(CTO & Co-Founder)

Co-investorsAct Venture CapitalAtlantic Bridge VenturesBusiness Venture Partners

Provizioprovizio.ai

Provizio develops software-defined imaging radar and AI perception software that converts raw radar data into insight for safety, efficiency, and automation.

AI & Machine LearningDeep TechMobility & Transportation

Barry L.(Founder)in

Co-investorsAct Venture CapitalTechFounders

S3 Connected Healths3connectedhealth.comin

S3 Connected Health provides development and deployment services for Software as a Medical Device (SaMD) applications and connected medical devices, supporting organizations from concept through operation with expertise in digital health connectivity and cybersecurity.

Digital HealthHealthtechMedical DevicesNot specified on page, IE

John(Executive Chairman and CEO)

Co-investorsAct Venture Capital

ServisBOTservisbot.comin𝕏

Servisbot develops AI agents, copilots, and assistants powered by generative AI for regulated industries, with built-in safeguards and human oversight to ensure compliant and controlled automation.

AI & Machine LearningEnterprise SoftwareSaaS

Co-investorsAct Venture Capital

SiriusXTsiriusxt.comin𝕏

SiriusXT develops the SXT-100 soft X-ray microscope, a laboratory-based imaging system that produces nanometer-resolution 3D images of fully hydrated intact cells.

BiotechDeep TechHardwareMedical DevicesDublin, IE

Co-investorsAct Venture CapitalDelta Partners

Spotted Zebraspottedzebra.co.ukin

Spotted Zebra provides an AI-powered interview intelligence and assessment platform that combines skills science with machine learning to help enterprise organisations identify and hire candidates based on skills rather than credentials.

AI & Machine LearningEnterprise SoftwareHR TechSaaSLondon, GB

Ian Monk(Founder)inNick Shaw(Founder)in

Co-investorsAct Venture CapitalEntrepreneur FirstNauta CapitalPlayfair Capital

Trustaptrustap.comin𝕏

Trustap provides payment processing, fulfillment, and customer support services for online marketplaces and e-commerce platforms across multiple asset classes including tickets, apparel, vehicles, and luxury goods.

B2B MarketplacesE-commerceFintechMarketplacesCork, IE

Conor Lyden(Founder)

Co-investorsAct Venture CapitalAtlantic Bridge VenturesFurthr VCPartners ResoluteTX Ventures

Umbaumba.comin𝕏

Umba is a digital bank for African consumers and small businesses that provides banking services, credit products, and payment solutions via mobile platforms.

FintechNairobi, KE

Co-investorsAct Venture CapitalDunbar CapitalFrontline VenturesStreamlined VenturesValia VenturesBanana Capital+6 more

UrbanFoxurbanfox.ioin𝕏

UrbanFox is an AI-powered fraud detection platform that uses generative AI and behavioral intelligence to detect online payment fraud, bot traffic, and account takeover attempts without relying on static rules.

AI & Machine LearningCybersecurityFintechDublin, IE

Co-investorsAct Venture CapitalFurthr VCJetBlue VenturesSKY VCTechstarsIAG Capital Partners

Verodatverodat.comin𝕏

Verodat provides a governed data supply chain platform that validates, tracks provenance, and structures business data so it can be reliably used by AI, analytics, and automation tools.

AI & Machine LearningData & InfrastructureEnterprise SoftwareDublin, IE

Thomas Russell(Founder)in

Co-investorsAct Venture Capital

VideoElephantvideoelephant.comin

Video Elephant provides a licensed video library and content distribution platform for publishers and broadcasters.

AdTechB2B MarketplacesMarketing TechMedia & EntertainmentSaaSDublin, IE

Co-investorsAct Venture CapitalFurthr VC

Visuavisua.comin𝕏

VISUA provides computer vision and visual AI technology for product authentication and brand protection, enabling automated verification of labels, holograms, tax stamps, and packaging using object detection via smartphone devices.

AdTechAI & Machine LearningCybersecurityDeep TechEnterprise SoftwareSaaSDublin, IE

Co-investorsAct Venture Capital

Vitro Softwarevitrosoftware.comin𝕏

Vitro is a clinician-designed digital medical record system that digitises hospitals' existing paper forms, pathways and workflows, capturing clinical data at the bedside and integrating scanned historical records with lab, radiology and patient administration results.

Digital HealthHealthtechSaaS

Co-investorsAct Venture Capital

Other

Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.

AkaraCorvilCR2Cubic3ESGEveryangleFrescoGocontractorHubliID PaliheedMavarickOcrexOralEyePlayterRecommenderXScurriSilverCloudSpectrum LifeTandem HRUboticaWorldnet Payments

Exits · 1

1 acquisitions

Gocontractoracq. by Safety Plus

Portfolio news

latest coverage across their companies

Frequently asked questions

How many investments has ACT Venture Capital made?
ACT Venture Capital has 54 tracked investments, 1 of which have exited.
What stage does ACT Venture Capital invest at?
ACT Venture Capital invests at the Seed, Series A, Series B, Series C, Growth stages.
What is ACT Venture Capital's typical check size?
ACT Venture Capital typically writes checks of $1.1M – $16.2M.
What sectors does ACT Venture Capital focus on?
ACT Venture Capital focuses on AI & Machine Learning, Biotech, Climate Tech, Cloud Computing, Consumer, Cybersecurity, Data & Infrastructure, Deep Tech, Defense Tech, E-commerce, Energy, Enterprise Software, Fintech, Hardware, Healthtech, IoT, Media & Entertainment, Medical Devices, SaaS, Semiconductors, Space Tech.
Where is ACT Venture Capital located?
ACT Venture Capital is headquartered in Dublin, IE.
Who does ACT Venture Capital co-invest with?
ACT Venture Capital most often shares deals with Act Venture Capital, Furthr VC, Atlantic Bridge Ventures, among 38 tracked co-investors.

Media · Podcasts & interviews

featuring the team

John O'Sullivan, ACT Venture Capital - Capital Ideas, season 2, episode 3

KPMG Ireland · John O'Sullivan

KPMG Capital Ideas Podcast - John O'Sullivan ACT Venture Capital

KPMG Ireland · John O'Sullivan

Images

ACT Venture Capital photoACT Venture Capital photoACT Venture Capital photoACT Venture Capital photoACT Venture Capital photoACT Venture Capital photo

Co-investors · 10

Atlantic Bridge Ventures

Atlantic Bridge is a growth equity firm investing in deep technology companies across Europe, the UK and the US, using a cross-border value-add strategy and a global platform to help portfolio companies scale internationally.

$1M – $5M
Rally Ventures Management, Llc

Rally Ventures is an investment firm focused on business technology companies, backing a select group of high-potential startups to help them grow market impact and value.

Both backed · 1
Corvil
$100K – $4M
WestWave Capital

WestWave Capital is an early-stage venture capital firm founded by former entrepreneurs and experienced investors, focused on backing founders building and scaling technology companies.

Both backed · 1
Molten Ventures

Molten Ventures is a European venture capital firm that backs technology founders from Series A onward, providing capital along with expertise and networks to help companies scale globally.

Both backed · 1
$2.5M – $63M
Seroba Life Sciences

Seroba is a Dublin-based life sciences venture capital firm investing in early-stage biotech and medtech companies developing new therapeutics and medical devices.

Both backed · 1
$540K – $7.6M
Accel

Accel is a venture capital firm that partners with exceptional teams, positioning itself as a first partner to founders globally.

$1.6M – $70M
Greylock Partners

Greylock Partners is an early-stage venture capital firm that partners with founders building companies from inception. Its partners make only one or two new investments per year to focus deeply on each partnership.

$100K – $200M
Wildcat Venture Partners

Wildcat Venture Partners is a venture capital firm that backs technology entrepreneurs aiming to create new market categories.

$500K – $6M
Verve Ventures

Verve Ventures operates a digital platform where qualified individuals and institutions can either commit to funds or cherry-pick single deals, blending a venture fund with a curated angel investing platform rather than using a traditional closed GP-LP structure. The fund focuses on deep tech investments in climate/energy, industrial tech, health & bio, and future computing, systematically tracking research teams in academia before they spin out into companies and conducting rigorous multi-month to multi-year diligence processes.

$1.1M – $2.2M
Sure Valley Ventures

Sure Valley Ventures is a venture capital firm investing in early-stage artificial intelligence software companies operating in the UK and Ireland.

Firms observed investing alongside ACT Venture Capital, from public investor directories. Shared companies are the overlap with ACT Venture Capital's recorded portfolio.

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