Operator Stack

Operator Stack is a venture capital firm established in 2019 and located in San Francisco, California. The firm focuses on early-stage investments, particularly in pre-seed and Series A funding rounds, targeting companies across various sectors including logistics, supply chains, fintech, and B2B SaaS. Operator Stack aims to support innovative technology ventures by leveraging its network of operators and industry expertise to foster growth and development in these key areas.

Natarajan Subbiah

Co-Founder and General Partner

12 past transactions

OpenInfer

Seed Round in 2025
OpenInfer develops an AI inference engine for edge applications

Nue

Series A in 2025
Nue is a prominent revenue management platform that specializes in automating sales and finance processes for businesses of all sizes. Its comprehensive suite of features includes automated pricing and quoting, sales enablement tools, and financial reporting and analytics. By leveraging usage-based billing and accurate analytics, Nue's platform enhances the efficiency of sales strategies and optimizes pricing models. This enables companies to improve their cash flow and streamline their operations, ultimately accelerating sales and fostering growth.

Vooma

Series A in 2024
Vooma is a back-office automation platform that specializes in automated order entry for brokers and carriers in the freight industry. The company has developed an AI-driven, web-based platform that facilitates efficient document management services. By providing tools that automate freight orders, Vooma enables brokers and carriers to manage their operations more effectively, increasing order volume without the need for additional staffing. This innovative approach streamlines processes and enhances productivity within the logistics sector.

Outgo

Venture Round in 2024
Outgo Inc. is an innovative eCommerce platform that serves as a comprehensive vertical banking solution specifically designed for freight carriers. Founded in 2022 by former executives from leading transportation companies, including Uber and Convoy, Outgo aims to streamline various financial processes for its users. The platform automates essential functions such as broker setups, invoicing, factoring, collections, accounting, and tax services, all without the need for contracts or minimums. This approach addresses longstanding challenges faced by carriers, empowering them to manage their finances more effectively. Headquartered in Seattle, Outgo is positioned to transform the financial landscape for the freight industry.

Distributional

Seed Round in 2023
Distributional is a developer of an AI testing and evaluation platform focused on ensuring that artificial intelligence systems are safe, reliable, and secure. The company offers tools for continuous monitoring, which include generating test cases and analyzing results. These tools help organizations ensure that their AI systems perform as expected, thereby fostering trust in AI technologies. By providing these capabilities, Distributional enables customers to deploy AI products more frequently and effectively, allowing them to fully leverage the potential benefits of AI within their operations.

Parade

Venture Round in 2023
Parade operates a mobile marketplace designed for the long-haul trucking industry, focusing on enhancing freight brokerage and capacity management. The company's technology connects carriers seeking backhaul opportunities with shippers, streamlining the process of booking loads and improving efficiency. By notifying carriers when their freight schedules are at risk, Parade helps them avoid unnecessary storage fees and detention costs. The platform integrates with existing tools to facilitate carrier relationship management, availability tracking, and pricing strategies. Founded in 2015 and headquartered in San Francisco, California, Parade has established itself as a valuable resource for top freight brokerages looking to optimize their operations.

Bluedot

Seed Round in 2023
Bluedot is a marketplace focused on enhancing electric vehicle (EV) charging accessibility. Founded in 2019 and headquartered in San Francisco, California, the company offers a software and hardware integrated system through a mobile application. This platform allows charger owners to schedule and share their charging spots, generating income while facilitating EV owners in locating both public and private charging units. The application not only enables users to track real-time availability of charging stations but also supports fleet owners in managing charge schedules, statistics, and maintenance remotely. Additionally, it serves as a universal charging payment and rewards platform for individual and fleet drivers, promoting the adoption of electric vehicles.

Nue

Seed Round in 2023
Nue is a prominent revenue management platform that specializes in automating sales and finance processes for businesses of all sizes. Its comprehensive suite of features includes automated pricing and quoting, sales enablement tools, and financial reporting and analytics. By leveraging usage-based billing and accurate analytics, Nue's platform enhances the efficiency of sales strategies and optimizes pricing models. This enables companies to improve their cash flow and streamline their operations, ultimately accelerating sales and fostering growth.

NorthOne

Series B in 2022
NorthOne Inc. provides digital banking solutions tailored for small businesses, startups, and freelancers. Founded in 2016 and headquartered in Toronto, Canada, with additional offices in New York and Boston, the company offers a mobile-first banking app that integrates various financial tools in a single platform. Users can manage their finances through features such as automated tax, payroll, and rent envelopes, and the ability to make deposits from anywhere. The app is accessible on iOS, Android, and desktop, ensuring a seamless banking experience while allowing businesses to focus more on their operations and community engagement.

Turaco

Series A in 2022
Turaco Inc. is an insurance technology company that specializes in providing health and life insurance services to low-income groups. Established in 2018 and based in Wilmington, Delaware, Turaco utilizes mobile technology to offer simplified insurance products and on-demand health loans. This approach addresses the healthcare financing needs of its customers, enabling them to access affordable medical coverage through manageable monthly premiums. By developing user-friendly mobile applications and online platforms, Turaco aims to enhance access to essential insurance services, particularly in emerging markets.

Stake

Series A in 2022
Stake enables renters to receive cash back rewards for paying their rent. Stake is on a mission to make renting financially rewarding, build renters’ savings with no fees or debt accumulation, and empower today’s owners to create financially safe and secure rental communities. Stake reduces downtimes and marketing costs while boosting top-line revenue with retention and renewals. Its data-powered rewards lessen the overall cost of incentives and concessions by over 50% and increase leasing velocity by 2x.

Greenscreens AI

Seed Round in 2022
Greenscreens.ai is a developer of AI-driven freight software aimed at enhancing the profitability of third-party logistics providers (3PLs). By utilizing machine learning and proprietary datasets, the company offers tools that enable users to confidently and efficiently price loads, ultimately increasing broker margin contributions. Its software provides real-time benchmarking and market predictions, allowing users to adapt to changing market trends quickly. This approach not only improves operational productivity but also reduces the time and uncertainty associated with pricing and booking loads. Through its innovative solutions, Greenscreens.ai helps clients identify missed revenue opportunities and empowers teams to operate at their highest effectiveness.
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