Rigetti Computing
IndustryQuantum computing
Founded2013 Edit this on Wikidata
FounderChad Rigetti
HeadquartersBerkeley, California, United States
Key people
Chad Rigetti, CEO
ProductsQuantum integrated circuits
Forest quantum computing software

Rigetti Computing is a Berkeley, California-based developer of quantum integrated circuits used for quantum computers. The company also develops a cloud platform called Forest that enables programmers to write quantum algorithms.[1]


Rigetti Computing was founded in 2013 by Chad Rigetti, a physicist who previously worked on quantum computers at IBM, and studied under noted Yale quantum scientist Michel Devoret.[1][2] The company emerged from startup incubator Y Combinator in 2014 as a so-called "spaceshot" company.[3][4] The company also went through enterprise revenue-focused The Alchemist Accelerator in 2014.[4]

By February 2016, the company had begun testing a three-qubit (quantum bit) chip made using aluminum circuits on a silicon wafer.[5] In March, the company raised Series A funding of US$24 million in a round led by Andreessen Horowitz. In November, the company raised Series B funding of $40 million in a round led by investment firm Vy Capital, along with additional funding from Andreessen Horowitz and other investors. Y Combinator was a smaller investor in both rounds.[4]

By Spring of 2017, the company was testing eight-qubit computers,[2] and in June, the company announced the public beta availability of a quantum cloud computing platform called Forest 1.0, which allows developers to write quantum algorithms.[1]

In October of 2021, it was announced that the company plans to go public via a SPAC merger, with estimated valuation around $1.5 billion.[6][7] This process will allow the company to raise an addition $458 million in funding, in addition to the $200 million raised previously.[6] With this funding, Rigetti plans to scale its systems from 80 qubits to 1,000 qubits by 2024, and to 4,000 by 2026.[8] The SPAC deal closed on 2 March, 2022, and the company began trading on the NASDAQ.[9]

Products and technology

Rigetti Computing is a full-stack quantum computing company, a term that indicates that the company designs and fabricates quantum chips, integrates them with a controlling architecture, and develops software for programmers to use to build algorithms for the chips.[10]

Forest cloud computing platform

The company hosts a cloud computing platform called Forest, which gives developers access to quantum processors so they can write quantum algorithms for testing purposes. The computing platform is based on a custom instruction language the company developed called Quil, which stands for Quantum Instruction Language. Quil facilitates hybrid quantum/classical computing, and programs can be built and executed using open source Python tools.[10][11] As of June 2017, the platform allows coders to write quantum algorithms for a simulation of a quantum chip with 36 qubits.[1]


The company operates a rapid prototyping fabrication ("fab") lab called Fab-1, designed to quickly create integrated circuits. Lab engineers design and generate experimental designs for 3D-integrated quantum circuits for qubit-based quantum hardware.[10]


The company was recognized by X-Prize founder Peter Diamandis as being one of the three leaders in the quantum computing space, along with IBM and Google.[12] MIT Technology Review named the company one of the 50 smartest companies of 2017.[13]


Rigetti Computing is headquartered in Berkeley, California, where it hosts developmental systems and cooling equipment.[12] The company also operates its Fab-1 manufacturing facility in nearby Fremont.[1]


  1. ^ a b c d e "The Quantum Computer Factory That's Taking on Google and IBM". wired.com. 2017-06-20. Retrieved 2017-07-20.
  2. ^ a b "A quantum leap of faith" (PDF). uregina.com. 2017-06-20. Retrieved 2017-07-20.
  3. ^ "11 startups to watch from Y Combinator's Demo Day". bizjournals.com. Silicon Valley Business Journal. 2014-08-20. Retrieved 2017-07-20.
  4. ^ a b c "Y Combinator's quantum computing 'spaceshot' scores $64M from A16Z, others". bizjournals.com. Silicon Valley Business Journal. 2017-03-29. Retrieved 2017-07-20.
  5. ^ "The Tiny Startup Racing Google to Build a Quantum Computing Chip". technologyreview.com. 2016-02-08. Retrieved 2017-07-20.
  6. ^ a b "Rigetti Announces SPAC Deal with Supernova II". Rigetti. Retrieved 2021-10-11.
  7. ^ Lee, Jane Lanhee (2021-10-06). "Quantum computer maker Rigetti to go public via $1.5 bln SPAC deal". Reuters. Retrieved 2021-10-11.
  8. ^ "Quantum-Computing Company Rigetti to Go Public Through SPAC Deal". MarketWatch. Retrieved 2021-10-11.
  9. ^ "Rigetti Computing Announces Closing of Business Combination with Supernova Partners Acquisition Company II, Ltd.; Begins Trading on Nasdaq Capital Market Today". globenewswire.com. 2 March 2022.
  10. ^ a b c "Rigetti Launches Full-Stack Quantum Computing Service and Quantum IC Fab". ieee.org. 2017-06-26. Retrieved 2017-07-20.
  11. ^ "Welcome to pyQuil!". readthedocs.io. Retrieved 2017-07-20.
  12. ^ a b "Massive Disruption Is Coming With Quantum Computing". singularityhub.com. 2010-10-16. Retrieved 2017-07-20.
  13. ^ "50 Smartest Companies 2017". technologyreview.com. Retrieved 2017-07-20.