Fundraising FoxUnion Bay Partnes
Venture capitalSeattle · Pre-Seed–Growth · 3 people tracked
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Investment thesis
Union Bay Partners pursues two complementary strategies: growth investments in small to mid-sized companies across the Pacific Northwest with strong fundamentals and clear growth paths, and pre-seed/seed investments in SaaS, AI, and software companies addressing large, underserved markets. Founded in 2012 and rooted in the Seattle ecosystem, the firm emphasizes deep operational expertise and long-term conviction, partnering closely with management teams to provide strategic guidance, network access, and hands-on support aimed at building category-leading, durable businesses with strong unit economics.
Source: firm website, verified Oct 2, 2026.
Team · 3 people
from the firm's websiteWhat they invest in
from 14 of 16 portfolio companiesAI & Machine Learning ×9SaaS ×7Enterprise Software ×6Data & Infrastructure ×4Developer Tools ×3Cleantech ×2Climate Tech ×2Energy ×2
HQs:United States×12Israel×1
Investments · 16 tracked
founders shown can be your intro path
AZX is an AI transformation engineering firm that builds tailored AI-enabled solutions and software for organizations in energy, real estate, supply chain, government, and other critical infrastructure industries.
AI & Machine LearningEnergyEnterprise Software
Richard Evans(Founder)in
Co-investorsAllen Institute for AI (AI2) IncubatorAscend Venture CapitalKOMPAS VCStepchangeAI2 IncubatorAscend+2 more
Comet builds infrastructure for developing, evaluating, and deploying AI applications in production.
AI & Machine LearningData & InfrastructureDeveloper ToolsNew York City, US
Gideon Mendels(CEO and Co-Founder)inNimrod Lahav(CTO and Co-founder)in
Co-investorsElevation CapitalGiTV, Inc.OpenView Venture PartnersScale Venture PartnersTechstarsTrilogy Equity Partners+3 more
Flexe provides platform-based warehousing network management, handling implementation, onboarding, and operations across multiple locations for customers seeking to scale their logistics infrastructure.
B2B MarketplacesLogistics & Supply ChainSaaSSeattle, US
Karl Siebrecht(Co-founder & CEO)inEdmond Yue(Director)inFrancis Duong(Director)inCurt Anderson(CFO & COO)in
BoardMike Galgon(Director)
Co-investors137 VenturesAcequia Capital (AceCap)ACTIVATE CAPITAL PARTNERSAlumni VenturesBlue Ivy VenturesCollective Liquidity+10 more
Gradient manufactures a window-mounted 120V heat pump for residential heating and cooling that installs without drilling or refrigerant handling.
CleantechClimate TechHardwarePropTechSan Francisco, US
Vince Romanin(Founder)in
Co-investorsAt One VenturesAutodesk FoundationAzolla VenturesClimate InvestmentCollaborative FundDangerous Ventures+6 more
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Groundlight builds machine learning and computer vision technology to enable robotics applications.
Advanced ManufacturingAI & Machine LearningDeveloper ToolsRoboticsSeattle, US
Co-investorsMadrona Venture GroupEssence Venture CapitalFlying Fish VenturesFounders' Co-opGreycroft Partners
Jozu provides security, governance, and orchestration solutions for the AI lifecycle, enabling enterprises to deploy and manage machine learning models securely and at scale.
AI & Machine LearningDeveloper ToolsEnterprise SoftwareNew York City, US
Jesse Williams(Founder)inBrad Micklea(Founder)in
Co-investorsAlleyCorpMozilla VenturesSentiero VenturesAlley Robotics VenturesPJC
PolyAI builds an agentic dialog platform that enables enterprises to deploy voice AI agents for handling complex customer service conversations at scale.
AI & Machine LearningEnterprise SoftwareSaaSNew York, US
Nikola Mrkšić(Co-founder & CEO)inShawn Wen(Co-founder & Chief Technology Officer)inEddy Su(Co-founder & SVP Engineering)inTsung-Hsien Wen(CTO)inPei-Hao Su(Cofounder)in
Co-investorsKhosla VenturesPassion CapitalGeorgianAir Street CapitalAlumni VenturesAmadeus Capital Partners+11 more
Possible Finance offers payday advances and short-term loans to individual borrowers, providing quick cash access without credit checks or hidden fees.
FintechLas Vegas, US
Tyler Conant(Founder)in
Co-investorsAltra VentureCanvas VenturesFJ LabsHustle FundUnion Square Ventures (USV)Unlock Venture Partners
Recurrent builds software and data analytics tools to help consumers and dealerships transition to electric vehicles and optimize EV adoption.
Climate TechData & InfrastructureMobility & TransportationRetail TechSaaS
Scott Case(Founder)in
Co-investorsArcTern VenturesAscend Venture CapitalAutomotive Ventures MobilityE8 AngelsEnerTech CapitalGoodyear Ventures+6 more
Recurve provides a unified software platform for utilities and their partners to manage demand-side energy programs by integrating data from multiple systems and using AI analytics to improve program performance and decision-making.
AI & Machine LearningCleantechData & InfrastructureEnergySaaSSan Francisco, US
Zach Robin(Chief Executive Officer)in
Co-investorsCity LightEarth FoundryEnergy FoundryFuture matters Venture CapitalLeap Forward VenturesPrelude Ventures+1 more
Routable provides business payment infrastructure and automation for accounts payable teams, enabling instant payments through FedNow and Real-Time Payments to US bank accounts, and automating invoice processing with features like PO-matching and AI-powered bill coding.
AI & Machine LearningEnterprise SoftwareFintechSaaSSan Francisco, US
Omri Mor(Founder/CEO)inTom Harel(Founder)in
BoardCHRIS DEVORE(Director)in
Co-investorsBoxGroupGood FriendsNat TurnerY Combinator1984 Ventures Management, LlcAddition+16 more
SparkToro provides audience research software that surfaces the websites, podcasts, YouTube channels, social accounts, search terms, and AI tools a target audience engages with.
Data & InfrastructureMarketing TechSaaSSeattle, US
Rand Fishkin(Executive Officer, Director, Promoter)in
Co-investors75 & Sunny
Updater provides an embedded commerce platform that lets audience owners (apps, websites, call centers, and AI agents) offer services like internet, moving, and utilities through a single integration, while giving service providers access to consumer acquisition channels.
AI & Machine LearningEnterprise SoftwarePropTechSaaSSales TechNew York, US
David Greenberg(Chief Executive Officer)inRaj Doshi(Senior Vice President of Sales)inRyan Hubbard(Chief Technology Officer)inAntony Catalano(Director)Grant Schaffer(Director)
Co-investorsCommerce VenturesFamily Angel Management FundMultiplier CapitalUnlock Venture PartnersSecond Century VenturesSoftBank Capital+1 more
Verdict Machine builds an AI-based cybersecurity platform that maps a financial institution's on-chain environment, evaluates proposed transactions against its policies before execution, and provides cyber risk assessment, wallet screening, and security posture monitoring.
AI & Machine LearningCrypto & Web3CybersecurityEnterprise SoftwareTel Aviv-Yafo, IL
Dan Danay(Founder)inIsaac Grossman(Founder)inLiran Kogan(CPO, Founder)in
Co-investorsTranspose Platform ManagementVela PartnersY CombinatorAgrolimen VenturesGaingelsOurCrowd+2 more
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Portfolio news
latest coverage across their companiesVerdict Machine · ycombinator.com · Aug 17, 2026
PolyAI · prnewswire.com · Dec 15, 2025
Recurve · recurve.com · Oct 1, 2025
Jozu · jozu.com · Aug 13, 2025
Frequently asked questions
- How many investments has Union Bay Partnes made?
- Union Bay Partnes has 16 tracked investments.
- What stage does Union Bay Partnes invest at?
- Union Bay Partnes invests at the Pre-Seed, Seed, Growth stages.
- What sectors does Union Bay Partnes focus on?
- Union Bay Partnes focuses on AI & Machine Learning, Climate Tech, Energy, Enterprise Software, Fintech, Logistics & Supply Chain, SaaS.
- Where is Union Bay Partnes located?
- Union Bay Partnes is headquartered in Seattle, US.