Second Avenue Partners
Venture capitalSeattle · Pre-Seed–Series C · 4 people tracked
Investment thesis
Second Avenue Partners makes early-stage investments in promising ventures across a broad range of areas including internet, consumer and social media, software, and clean energy, while remaining open to other ideas. The firm looks for strong entrepreneurial teams, innovative and market-disruptive concepts, and business models leveraging cutting-edge technologies. Beyond capital, it provides management and strategy support and emphasizes building long-term, mentoring relationships with portfolio companies to help them become market leaders.
Source: firm website, verified Aug 3, 2026.
Team · 4 people
from the firm's website
What they invest in
from 13 of 23 portfolio companiesSaaS ×6Enterprise Software ×5AI & Machine Learning ×4Advanced Manufacturing ×3Cleantech ×2Data & Infrastructure ×2New Materials ×2PropTech ×2
HQs:United States×12
Investments · 23 tracked
founders shown can be your intro pathBy year:2021 · 22018 · 12016 · 14 dated
Seeq develops industrial AI and advanced analytics software that combines operational data, documentation, and historical context with the expertise of industrial teams to support operational and strategic decisions.
Advanced ManufacturingAI & Machine LearningData & InfrastructureEnterprise SoftwareSaaSSeattle, US
Steven M. Sliwa(Executive Officer, Director)Brian Parsonnet(Executive Officer, Director)Lisa Graham(Executive Officer)Michael Risse(Executive Officer)Mark Derbecker(Executive Officer)inTammy Martin(Executive Officer)
Board seatPete Higgins· per SEC Form D
Co-investorsAltira Group LLCChevron Technology VenturesInsight PartnersSaudi Aramco Energy VenturesSixth StreetAltira Technology Overflow+2 more
IOTA is an industrial visualization platform that provides real-time monitoring, multi-vendor data integration, and analytics for industrial process manufacturers.
Advanced ManufacturingData & InfrastructureEnergyEnterprise SoftwareSaaSDurham, US
Terry Rulapaugh(Executive Officer, Director)Tamara Miller(Executive Officer)Ivan Datskov(Executive Officer, Director)Ted Gorrie(Executive Officer)Olga Datskova(Executive Officer)Alexander Kulikov(Executive Officer)
Co-investorsAltira Group LLCAramco Ventures
Seattle, US
Jon Zimmerman(Executive Officer, Director)Stephen M. Brewer(Executive Officer, Director)
BoardBoris Wertz(Director)Mike Maples, Jr.(Director)inSam Osman(Director)
Board seatNick Hanauer· per SEC Form D · $4.5M raise · filed Dec 2016
Co-investorsFloodgateVersion One Ventures
Seattle, US
Laura Jennings(Executive Officer, Director)
Board seatNick Hanauer· per SEC Form D · $3.5M raise · filed Dec 2021
FitOn is a digital wellness platform offering on-demand workouts, meditation, yoga, and personalized nutrition and meal plans, with social features like challenges and friend support.
Digital HealthSports TechWellness & FitnessWest Hollywood, US
Lindsay Cook(Executive Officer, Director)inEdward J. Buckley III(Director)Russell Cook(Executive Officer, Director)
BoardYash Patel(Director)inBrett Carlson(Director)David Schaller(Director)
Co-investorsAccelCauseway PartnersCrosscut VenturesMantis CapitalTitanium VenturesDelta-v Capital+2 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)Francis Duong(Director)Curt Anderson(CFO & COO)
BoardMike Galgon(Director)
Co-investors137 VenturesAcequia Capital (AceCap)ACTIVATE CAPITAL PARTNERSMadrona Venture GroupRedpoint VenturesPioneer Square Ventures+1 more
Footprint develops and manufactures plant-based fiber materials and packaging designed as alternatives to single-use plastic.
Circular EconomyCleantechNew Materials
Co-investorsCleveland AvenueImpact EngineS2G Investments
Insitu develops uncrewed aircraft systems (UAS/UAVs), sensor payloads, and control software for intelligence, surveillance, and reconnaissance (ISR) missions on land and at sea, primarily serving defense and military customers.
Defense TechHardwareRoboticsBingen, US
Diane Rose(President and CEO)Andrew Duggan(Vice President and Managing Director, Insitu Pacific)Heather Shoup(Vice President of Business Operations)John Kelly(Vice President of Growth)
Co-investorsBattery Ventures
IUNU builds LUNA, an AI and computer vision platform that autonomously tracks plant development and turns crop data into real-time insights for growers.
AgTechAI & Machine LearningSaaSSeattle, US
ADAM GREENBERG(CEO)Adam Greenberg(Founder)
Co-investorsAstanor VenturesCeres PartnersS2G InvestmentsTaurus VenturesBootstrapLabsSerra Ventures
Knock provides a software platform for leasing teams at apartment and residential properties to manage the leasing process through automated workflows, engagement tracking, and task management tools.
Enterprise SoftwarePropTechSaaS
Co-investorsMadrona Venture Group
Property management CRM platform for multifamily housing that helps ownership groups improve NOI.
Market Leader provides real estate lead generation and a CRM with marketing automation tools for real estate agents, teams, and brokers.
Marketing TechPropTechSaaS
Modumetal develops nanolaminated metal alloys designed to outperform conventional metals on performance, durability, and sustainability.
Advanced ManufacturingCleantechDeep TechNew MaterialsSeattle, US
Christina Lomasney(Executive Officer, Director)John Beaver(Executive Officer)
BoardAaron VanDevender(Director)Steve Singh(Director)
Co-investorsBandgap VenturesID8 Investmentsbp venturesChevron Technology VenturesFounders FundGolden Seeds
Leading digital wellness platform offering premium content and social experiences with unlimited access across devices.
RealSelf is an online platform where consumers can research cosmetic and aesthetic procedures, read peer reviews with "Worth It" ratings, and view average cost information for treatments such as HydraFacial, PRP injections, and Sculptra.
ConsumerHealthtechMarketplacesWellness & FitnessSeattle, US
Thomas Seery(Executive Officer, Director)James Nida(Executive Officer)Christine Petersen(Director)Richard Barton(Director)Tanja Omeze(Executive Officer)Andrew Hunt(Director)
Uplevel provides data analytics and expert guidance to engineering leaders to diagnose organizational issues affecting developer productivity and team performance.
AI & Machine LearningDeveloper ToolsEnterprise SoftwareFuture of WorkHR TechSeattle, US
Co-investorsCota CapitalMadrona Venture GroupNorwest Venture PartnersVoyager Capital
Rows marked “SEC filing” are inferred from directors named on the company's SEC Form D — public regulatory data, not a portfolio list published by the firm.
Portfolio news
latest coverage across their companiesIUNU · agfundernews.com · Apr 16, 2025
Frequently asked questions
- How many investments has Second Avenue Partners made?
- Second Avenue Partners has 21 tracked investments.
- What stage does Second Avenue Partners invest at?
- Second Avenue Partners invests at the Pre-Seed, Seed, Series A, Series B, Series C stages.
- What sectors does Second Avenue Partners focus on?
- Second Avenue Partners focuses on Cleantech, Consumer, Energy, Media & Entertainment, SaaS, Sector Agnostic, Social.
- Where is Second Avenue Partners located?
- Second Avenue Partners is headquartered in Seattle, US.
- Who does Second Avenue Partners co-invest with?
- Second Avenue Partners most often shares deals with Madrona Venture Group, Accel, Battery Ventures, among 23 tracked co-investors.
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