harmonic.fun

# Harmonic

> Harmonic is building the world’s most advanced reasoning engine.

Try Aristotle, an AI that formally verifies your software and hardware.

## Pages

- [Home](https://www.harmonic.fun/): Try Aristotle, an AI that formally verifies your software and hardware.
- [Aristotle](https://www.harmonic.fun/aristotle/): Your agents write more code than your team can review. Aristotle finds what your code must get right and proves it on every commit.
- [Case studies](https://www.harmonic.fun/aristotle/case-studies/): Engineering teams use Aristotle to find bugs and prove their hardware and software correct.
- [About](https://www.harmonic.fun/about/): Harmonic is building the world’s most advanced reasoning engine. Our mission, values, founders and investors.
- [Careers](https://www.harmonic.fun/careers/): The future of software is verified. Read why our team joined Harmonic, and find your role.
- [News](https://www.harmonic.fun/news/): Research, engineering and company news from Harmonic.

## Case studies

- [Tensordyne’s most complex block and early exploration for its next chip](https://www.harmonic.fun/aristotle/case-studies/tensordyne/): Aristotle proved 185 properties of Tensordyne’s most complex block, refuted 56 with counterexamples, and found bugs up to 110,000 cycles deep.
- [Speed up your code without wondering what you broke](https://www.harmonic.fun/aristotle/case-studies/libtommath/): Aristotle fixed three bugs in LibTomMath, made modular exponentiation 31–38% faster in our benchmarks, and proved the faster code meets the same spec.

## News

- [Aristotle Expands Into Formal Verification for Software and Hardware, Starting With C and Verilog](https://www.harmonic.fun/news/aristotle-software-hardware-verification/): Today we’re bringing Aristotle to software and hardware, starting with C and Verilog.
- [Powering the Future of MSI with Inaugural $300,000 Donation to Lean FRO](https://www.harmonic.fun/news/lean-fro-donation/): Harmonic’s inaugural $300,000 donation to the Lean Focused Research Organization begins a partnership to advance formal reasoning and mathematical AI.
- [Harmonic Announces Mathematician Sponsorships to Accelerate Mathematical Superintelligence](https://www.harmonic.fun/news/mathematician-sponsorships/): Harmonic is providing $1 million of sponsorships to students and researchers through Principal Investigator Awards and Rising Mathematician Awards.
- [Open-sourcing python-memtools: a memory analyzer for Python programs](https://www.harmonic.fun/news/python-memtools/): python-memtools takes a snapshot of a Python process’ memory and finds the Python objects in it. It showed that a cycle of async tasks made our script hang.
- [Open Sourcing pbcc: A Faster, Leaner Protobuf Compiler for Python](https://www.harmonic.fun/news/pbcc/): The pbcc compiler generates specialized C++ code for Protobuf messages, with no artificial size limits and native Python types such as lists and dicts.
- [Aristotle Learns to Code, Achieving New State-of-the-Art of 96.8% on Code Verification Benchmark](https://www.harmonic.fun/news/verina-benchmark/): Of the 189 formal specifications in the VERINA benchmark, Aristotle proved 160 to be correct and 23 to be false, with the version available in our API.
- [Announcing Our Series C Funding As We Build Momentum Towards Mathematical Superintelligence (MSI)](https://www.harmonic.fun/news/series-c/): Harmonic raised $120 million in Series C funding led by Ribbit Capital. The round values Harmonic at $1.45 billion.
- [How Aristotle Achieved its IMO Gold Medal-Level Performance](https://www.harmonic.fun/news/imo-gold/): Our first technical report describes the architecture and methodology behind Aristotle and the core components that enable its Olympiad-level performance.
- [Running Lean at Scale](https://www.harmonic.fun/news/lean-at-scale/): Our REPL service runs Lean for our reinforcement learning system. For a while during the IMO, it ran Lean code on nearly 500,000 CPUs at once.
- [Introducing Yuclid+Newclid 3.0](https://www.harmonic.fun/news/yuclid-newclid-3/): We are releasing Yuclid and Newclid 3.0, the systems behind our success on IMO Problem 2. Yuclid can run up to 500X faster than AlphaGeometry 1.
- [Aristotle Achieves Gold Medal-Level Performance at the International Mathematical Olympiad, iOS App Beta Launch](https://www.harmonic.fun/news/imo-ios/): Aristotle achieved Gold Medal-level performance at the 2025 International Mathematical Olympiad, with formally verified proofs. Aristotle for iOS is in beta.
- [Harmonic Announces Series B Funding](https://www.harmonic.fun/news/series-b/): Harmonic raised $100M in Series B funding led by Kleiner Perkins to accelerate the development of Mathematical Superintelligence.
- [Harmonic Closes Series A Funding Round](https://www.harmonic.fun/news/series-a/): Harmonic closed a $75 million Series A round led by Sequoia Capital to accelerate the development of mathematical superintelligence.
- [One month in - A new SOTA on MiniF2F and more](https://www.harmonic.fun/news/minif2f/): Aristotle achieved 90% on MiniF2F, a new state-of-the-art up from 83% last month. We are also releasing our revision of MiniF2F, translated to Lean 4.
- [Introducing Harmonic: Our Mission and First Results](https://www.harmonic.fun/news/intro-harmonic/): Harmonic is building mathematical superintelligence. Our first result is Aristotle, a theorem prover that advances the state of the art on MiniF2F.

## Optional

- [Ashby job board](https://jobs.ashbyhq.com/Harmonic): Application links for listed jobs