Most Backed AI Infrastructure Startups in Seattle, WA 2026

3 AI Infrastructure startups in Seattle, WA ranked by verified backer count, led by Augmodo, Aurelian, Oumi. Each links to its full syndicate breakdown.

AI Infrastructure in Seattle, WA accounts for 3 tracked companies with verified cap-table data, 3 of which disclose round sizes totalling $331M. The median disclosed raise is $120M, and the largest is Gradial at $120M, ahead of Phaidra ($120M) and Supio ($91M).

The names that recur most often on these ai infrastructure cap tables are Insight Partners (1 company), VMG Partners (1 company), Madrona (1 company), Pruven Capital (1 company), General Advance (1 company), Outsiders Fund (1 company). By latest disclosed round, the market skews Series B (2), Series C (1).

Best funded AI Infrastructure in Seattle, WA companies

  1. Gradial — $120M (latest: Series C)
  2. Phaidra — $120M (latest: Series B)
  3. Supio — $91M (latest: Series B)

Sector × city funding reports (20)

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•By Alejandro Cremades