Addition

Addition is a multi‑stage, global venture capital firm built to back founder‑led, technology‑enabled companies from seed through growth. Led by Lee Fixel, the firm’s centralized, solo‑decision model and 15‑year fund life enable fast commitments and patient support. Roughly one‑third of capital targets early‑stage opportunities, with the balance devoted to growth. Sectorally, Addition concentrates on scalable infrastructure and platforms that power large markets: fintech/payments networks that operate across borders; developer and cloud infrastructure that accelerate software delivery; data/AI tooling that enables enterprises to evaluate, tune and deploy AI; cybersecurity/observability that underpins reliability at scale; and blockchain/crypto compliance infrastructure that supports responsible adoption. Geographically, Addition invests wherever category leaders can emerge. Recent led and co‑led financings span North America (Snorkel AI, Stedi, Render), Europe (Satispay), the Middle East and Africa (Flash), and APAC (Airwallex). The firm repeatedly leads sizable growth rounds in breakout companies while also initiating seed positions in promising teams. Public evidence shows a preference for businesses with strong product‑market fit, rapid usage or revenue growth, and the potential to scale globally through software and network effects. Partners’ statements in portfolio announcements emphasize building foundational, regulated infrastructure (e.g., Chainalysis) and modern alternatives to legacy systems (e.g., Airwallex), consistent with a thesis of enabling durable, mission‑critical capabilities. Addition’s risk appetite includes frontier infrastructure (AI data development, electronics telemetry) and global fintech at scale, balanced by a focus on traction and enterprise value drivers rather than speculative science projects. Decision patterns indicate willingness to lead, co‑lead, and follow‑on opportunistically in high‑conviction assets, often on accelerated timelines. Overall, Addition’s core belief is that concentrated, fast, high‑conviction capital behind platform companies in massive markets creates outsized value, and that patient, long‑duration ownership can compound those gains.

Addition’s investment thesis revolves around three pillars: (1) a clear, sizable market need often linked to emerging structural trends (e.g., AI‑driven data‑center bandwidth, fintech credit demand), (2) a founding team with deep technical expertise and execution capability, and (3) traction that matches the stage – early user growth for Series A and robust enterprise adoption for growth rounds. The firm frequently leads rounds when it has high conviction, as seen in TruePay Series A and Satispay Series D, and it will co‑invest alongside other top VCs when it wants to increase exposure without being the sole lead (e.g., Chainalysis later rounds). Market timing and team quality outweigh short‑term metrics; the firm avoids deals lacking clear market fundamentals or a team that can scale the opportunity.

• FlashLead
  Emerging-markets fintech infrastructure for QR and contactless payments, matching Addition's early-stage fintech focus.
• ZellerLead
  Payments stack built by ex-Square executives targeting the large SMB fintech market; Addition led the Series A (March 2021).
• RenderLead
  Developer-focused cloud platform with strong product-led growth potential, fitting the firm's software thesis.
• OctoMLLead
  Machine-learning acceleration infrastructure that can serve many verticals; Addition led the $28M Series B in 2021.
• TinesLead
  No-code security automation addressing a fast-growing SOAR market.
• Path RoboticsLead
  AI-driven industrial automation for welding; Addition led the $56M Series B in 2021 (though participated only in more recent rounds).
• BranchLead
  Workforce payments and earned-wage access platform, complementing the firm's fintech infrastructure theme.
• TrueLayerLead
  Open-banking rails in Europe; Addition led the $70M Series D in 2021.
• Base PowerLead
  Grid-scale distributed energy platform combining capital-intensive assets with software/data layers; Addition led the $1B Series C in 2025.
• ChronosphereLead
  Cloud-native observability platform; Lee Fixel co-led the Series B, and Addition has participated in later rounds.

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  Madrona

  OctoML