# Peak XV leads $45 mn Series B in US AI startup Blacksmith at $550 mn valuation 2026-08-14T09:23:04+00:00 | Business & Economy | Indian Opinion Desk Corroboration: 1 independent outlet Peak XV Partners has led a $45 mn Series B funding round in San Francisco-based AI code testing startup Blacksmith, valuing the company at $550 mn. Existing investors Google Ventures and Y Combinator also participated in the round, which closed in March 2026 but was announced now. The startup has raised $58.5 mn in total to date. Blacksmith plans to use the capital to expand its computing infrastructure amid rising demand for tools that validate AI-generated code. It claims its cloud infrastructure can run workloads twice as fast as GitHub-hosted runners at 50-75% lower cost. The company, founded in 2024, now serves over 6,000 firms including Supabase and Clerk. Peak XV is expanding in the US, opening a San Francisco office and backing AI startups like Vapi and Mem0. ## Coverage - inc42.com Tags: AI, Blacksmith, funding, Peak XV, US, venture capital Canonical: https://indianopinion.org/peak-xv-leads-45-mn-series-b-in-us-ai-startup-blacksmith-at-550-mn-valuation/ License: Summary and commentary (c) Indian Opinion, reusable with attribution. Facts belong to the linked sources. Cite: https://indianopinion.org/peak-xv-leads-45-mn-series-b-in-us-ai-startup-blacksmith-at-550-mn-valuation/#story-in-brief Review state: restored archive article, accurate at time of publication, not offered to search indexes.