Vellum

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Raised $20M Series A on July 10, 2025

Use Vellum to build and ship reliable AI solutions. Define, evaluate and monitor AI solutions through test-driven development for AI.

New York, United States

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$20M Series A

DevTools

Onsite

11–50

Build realtime AI.

Joyful code review.

AI-native observability platform.

Open-source Firebase alternative.

Autopilot for your browser.

Fully managed CDC streaming platform.

Build something real.

How developers build successful products.

DataFrames for the new era.