Blacksmith

Blacksmith is a dead-simple, drop-in replacement for GitHub runners across Linux, Windows, and macOS that helps you run GitHub Actions faster, make everything (actually) observable, and reduce CI cost.

Developer tools and cloudY Combinator

Latest funding

$66M Series B+ · October 21, 2026

Source: finsmes.com

Total raised: $125M* across 5 sourced rounds

All 5 rounds ↓

Website: blacksmith.sh.

X: @useblacksmith · 8,237 followers.

LinkedIn: blacksmithrun.

Category: Developer tools and cloud.

Sectors: B2B, Infrastructure.

Stage: Series B+.

Based in: San Francisco, United States.

Founded: 2024.

Total raised: $125M* in 5 sourced rounds.

Last round: Oct 21, 2026 · 22 days ago.

Team: 3 people on the team page.

On Recent Funding since: Sep 28, 2026.

Signals

X account@useblacksmith · created Jan 11, 2024 (2 years old) · 8,237 followers

Website registeredDec 15, 2023 (2 years old)

TIMELINE · MONEY RAISED

Blacksmith | 503 days from website to first raise on record

@useblacksmith·Raised $125M in 4 sourced rounds·2 signals before the first raise

Money raised, round by round (amounts linked to their source). Pins are dated signals; hover the icons for dates.

Funding rounds

October 21, 2026
Series B+ · $66M
Source: finsmes.com
August 12, 2026
Series B+ · $45M · $550M valuation
PPeak XV (lead)
Source: techcrunch.com
September 18, 2025
Series A · $10M
GGV (lead)
Source: blacksmith.sh
May 1, 2025
Seed · $3.5M
GGV (lead), YY Combinator (lead), EEli Brown, JJJ Fliegelman, MMachina Ventures, PPeter Mattis, RRichard Aberman, SSpencer Kimball, TTheo Browne
Source: fundraisingfox.com
January 11, 2024
X account created
December 15, 2023
Website created
Date unknown
Round · $500K*
YY Combinator
Source: ycombinator.com

Founders and team

AJ
Aditya Jayaprakash Co-Founder & CEO

@adijayaprakash · LinkedIn · source: foundertrace.com
AS
Aayush Shah Co-Founder

LinkedIn · source: foundertrace.com
AM
Aditya Maru Co-Founder

@adityamaru27 · LinkedIn · source: foundertrace.com
JB
Jon Boyer VP of Sales

Investors

Companies like Blacksmith

BBun$7M Seed · Aug 2022
SStarSling$3M Pre Seed · Sep 2026
SShapr3DSeries A · May 2026
HHighscore
PPaid AI Infrastructure$21M Seed · Sep 2025
CCircularity Fuels$7M Seed · Nov 2026

Other companies backed by Peak XV

PPowerUp Money$10M Series A · Nov 2026
HHex$100M Series B+ · Oct 2026
MMaxInsights$30M Seed · Oct 2026
BBioStack Platforms$9.5M Seed · Oct 2026
RRapidCanvas$29M Series B+ · Oct 2026
SScapia$63M Series B+ · Oct 2026

Peak XV portfolio →

Sources and API

Every amount links to the page it came from. * Estimated from an accelerator's published standard deal, not a company-specific disclosure. How Recent Funding sources and verifies funding data. The same data as JSON: /api/v1/companies/blacksmith (get a free API key).