Harmonic

Harmonic is leading the development of Mathematical Superintelligence (MSI), having already developed a system that achieves 90% on MiniF2F, the top formal mathematics benchmark.

Latest funding

$120M Series B+ · November 26, 2025

Led by Ribbit Capital · Source: finsmes.com

Latest round on record: Seed, January 2026, amount undisclosed.

Total raised: $295M across 3 sourced rounds

All 4 rounds ↓

Website: harmonic.fun.

X: @HarmonicMath · 27,622 followers.

LinkedIn: harmonicmath.

Categories: Foundation models and research Education.

Sectors: Artificial Intelligence (AI), Foundational AI, Machine Learning, Software.

Stage: Series B+.

Based in: Palo Alto, United States.

Founded: 2023.

Total raised: $295M in 3 sourced rounds.

Last round: Jan 13, 2026 · 306 days ago.

Headcount: 11–50 employees.

On Recent Funding since: Sep 29, 2026.

Signals

X account@HarmonicMath · created Jan 6, 2024 (2 years old) · 27,622 followers

Website registeredJul 20, 2023 (3 years old)

About Harmonic

Harmonic was founded by Robinhood CEO Vlad Tenev and Helm.ai co-founder Tudor Achim.

TIMELINE · MONEY RAISED

Harmonic | 431 days from website to first raise on record

@HarmonicMath·Raised $295M in 3 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

Date	Round	Amount	Lead	Source
Jan 13, 2026	Seed	undisclosed	—	fundraisingfox.com
Nov 26, 2025	Series B+	$120M	RRibbit Capital	finsmes.com
Jul 10, 2025	Series B+	$100M	KKleiner Perkins	businesswire.com
Sep 23, 2024	Series A	$75M	IIndex Ventures	finance.yahoo.com

Timeline

January 6, 2024
X account created
July 20, 2023
Website created

Founders and team

TA
TUDOR ACHIM Co-Founder and CEO

@tachim · LinkedIn · source: harmonic.fun
VT
VLAD TENEV Co-Founder and Executive Chairman

@vladtenev · LinkedIn · source: harmonic.fun

Investors

Companies like Harmonic

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BBlackbird$50M Series B+ · Apr 2025
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MMonaco$50M Series B+ · May 2026

Other companies backed by Ribbit Capital

IImprint$400M Series B+ · Nov 2026
BBlockaid$40M Series B+ · Nov 2026
NNevis$60M Series B+ · Oct 2026
NNavra$19M Series A · Oct 2026
VValon$150M Series B+ · Oct 2026
AArtificial Intelligence Underwriting Company$40M Series A · Sep 2026

Ribbit Capital 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/harmonic (get a free API key).