Startup profile for Blacksmith: latest funding, latest known valuation, total disclosed funding, investors, status, sources, and why the company is interesting. Part of the Venture Capital Tracker startup directory.
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Blacksmith funding, valuation and investors

Managed computing infrastructure for building and testing software, including code produced by AI agents.

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Funding, valuation & investors

Answer-first snapshot

Latest funding

Series C

$66M · October 21, 2026

Latest known valuation

$1B; pre/post-money basis unspecified

Series C · October 21, 2026

Total disclosed equity funding

$121M

Excludes debt, grants, acquisitions, secondaries, and IPO proceeds.

Current status

private

growth · New York / San Francisco

Investors in latest funding

Lead: Sequoia Capital

Other: Premji Invest , Peak XV Partners , GV , Y Combinator

Sources: latest funding · prnewswire.com Last verified: 2026-10-22

Overview

Blacksmith runs software builds and tests on managed compute infrastructure, including GitHub Actions runners. On October 21, 2026, it announced a $66M Series C led by Sequoia Capital, with Premji Invest, Peak XV Partners, GV and Y Combinator participating, at a $1B valuation whose pre/post-money basis was unspecified. Blacksmith reports approximately $125M total funding, more than 10,000 companies using its platform and 17-fold ARR growth since January, without disclosing the revenue base or current profitability. Its $45M Series B was announced in August 2026 but closed in March.

Why Blacksmith is interesting

Sequoia led Blacksmith's $66M Series C announced October 21, 2026 at a $1B valuation. The business sells usage-based build and test compute; hardware utilization and reliable delivery determine the economics.

Product & use cases

Purpose-built CI cloud plus agent tooling to validate and merge code faster as AI increases PR and test volume.

  • Faster CI for teams adopting Claude Code / Cursor-class codegen
  • Autofixing flaky or failing CI to unblock merges
  • Scaling runner capacity without building an internal CI cloud

Key facts

  • $66M Series C announced October 21, 2026; Sequoia leads; $1B valuation, basis unspecified.
  • Approximately $125M cumulative funding reported by the company.
  • Company-reported weekly CI jobs increased from 5M in January to over 90M; ARR grew 17x, base undisclosed.
  • Just under 10MW of compute reported in October; fivefold footprint expansion in 2027 is a target.

Funding history (newest first)

Series C

2026-10-21 $66M Valuation: $1B; pre/post-money basis unspecified

Source: Read source · prnewswire.com

Series B

2026-03 $45M Valuation: $550M

Source: Read source · blacksmith.sh

Series A

2025-09 $10M

Source: Read source · techcrunch.com

Investors in our directory

Funds linked from Blacksmith's profile — open a fund page for stage focus and related deal articles.

y-combinator sequoia premji-invest peak-xv-partners gv

Competitive landscape

Edge: Blacksmith emphasizes purpose-built computing infrastructure, managed capacity and compatibility with existing GitHub Actions workflows. Performance and savings claims require workload-specific evaluation.

The commercial test is cost per completed build and reliable capacity. Funding and higher job volume do not by themselves establish profitable utilization.

  • Namespace direct

    Build and test infrastructure, GitHub runners and owned server racks; announced $42M Series B October 5, 2026.

  • Depot direct

    Build acceleration, GitHub runners and programmable CI; announced $10M Series A March 10, 2026.

  • GitHub-hosted runners incumbent

    Built-in execution environment for GitHub Actions; customers compare total workload cost and reliability.

  • Internally managed runners alternative

    Retain direct infrastructure control while taking responsibility for capacity, isolation, updates and operations.

Industries

developer-tools ai-ml infra-cloud

Market / IPO context

Editorial / static context — not a live quote.

Related funding articles

Venture Capital Tracker pieces that cover Blacksmith's financing or category context.

FAQs about Blacksmith

Practical answers founders, operators, and investors typically search for.

It runs software builds and automated tests on managed computing infrastructure, helping engineering teams avoid managing their own runner fleets.
A $66M Series C announced October 21, 2026, led by Sequoia Capital with Premji Invest, Peak XV Partners, GV and Y Combinator.
The Series C announcement disclosed $1B, without specifying whether that is pre-money or post-money.
Customers pay for compute usage and separately priced infrastructure extras such as storage and caching.
Current profitability and gross margins were not disclosed in the reviewed October 2026 financing sources.
Blacksmith reports more than 10,000 companies using its platform, including Mercury, Granola, Handshake and LangChain. These are company-reported adoption figures.
The company says its $45M Series B closed in March 2026 and was announced on August 12.
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By Venture Capital Tracker

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Editorial note: AI tools assisted with research, structure, or drafting. Venture Capital Tracker retains human editorial responsibility for factual accuracy, relevance, and source quality before publication.