7Baggers

QuantumScape
(NYSE:QS) 

QS stock logo

QuantumScape Corporation, a development stage company, engages in the development and commercialization of solid-state lithium-metal batteries for electric vehicles and other applications. The company was founded in 2010 and is headquartered in San Jose, California.

Founded: 2010
Full Time Employees: 200
CEO / Founder: Jagdeep Singh 
Sector: Consumer Cyclical
Industry: Auto Parts

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At a glance:
  • Commercialization Timeline Still a Key Swing Factor: QuantumScape remains pre-revenue, with valuation and investor sentiment heavily tied to progress on scaling solid-state cells from pilot output to automotive-qualified production.
  • Manufacturing Scale-Up Risk Dominates the Investment Case: The core challenge is translating lab and prototype performance into consistent, high-yield manufacturing, where throughput, quality control, and unit economics will determine viability.
  • Cash Burn Continues; Funding Runway and Dilution Matter: The company typically operates with negative free cash flow as it invests in R&D and pilot manufacturing, making liquidity, future capital raises, and dilution central considerations.
  • Performance Claims vs. Real-World Validation Remains in Focus: Investors track independent and customer validation on cycle life, fast-charging capability, energy density, and safety under automotive duty cycles, not just internal test results.
  • Strategic Partnerships and OEM Pull-Through Are Critical: Partnership depth and the path to binding supply agreements with automakers can provide both funding support and a clearer route to high-volume deployment.
Bull Thesis:
  • Successful Technology Validation & Performance Milestones: QuantumScape has demonstrated promising performance metrics (e.g., high energy density, fast charging, long cycle life, wide temperature range) in multi-layer cells, validating the core solid-state technology and its potential to revolutionize EV batteries.
  • Strategic OEM Partnerships & Commercialization Path: The strong partnership with Volkswagen, including joint venture plans and significant investment, provides a clear path to commercialization and validation from a major automotive player, potentially attracting other OEMs.
  • Advancements in Manufacturing Scalability: Progress in scaling up production from pilot lines (QS-0, QS-1) to higher volume manufacturing, demonstrating improving yields and the ability to produce cells at a cost-effective rate, is crucial for market penetration.
  • Robust Intellectual Property Portfolio: QuantumScape holds a significant and growing portfolio of patents protecting its unique solid-state separator and cell architecture, creating a strong competitive moat and barrier to entry for potential rivals.
Bear Thesis:
  • Significant Manufacturing Scale-up & Yield Challenges: The transition from lab-scale prototypes to high-volume, cost-effective mass production of solid-state batteries is historically difficult, with potential for low yields, high defect rates, and delays impacting commercial timelines.
  • Intense Competition & Evolving Battery Landscape: QuantumScape faces fierce competition from numerous other solid-state battery developers (e.g., Solid Power, Toyota, Factorial) and continuous improvements in traditional lithium-ion technologies, which could erode its competitive advantage or market share.
  • High Capital Requirements & Future Dilution Risk: Scaling battery manufacturing is extremely capital-intensive. QuantumScape will likely require substantial additional funding for future gigafactories, potentially leading to significant shareholder dilution through equity raises.
  • Long & Uncertain Path to Commercial Revenue: Despite promising technology, the timeline for widespread commercial adoption and significant revenue generation remains long and subject to delays, as automotive qualification cycles are extensive and demanding.
Main Competitors:
  • Solid Power ($SLDP) (Solid-state battery technology (sulfide-based electrolyte)), Directly competes with QuantumScape in the development and commercialization of solid-state batteries for electric vehicles. Solid Power utilizes a sulfide-based solid electrolyte, a different chemistry from QuantumScape's ceramic separator, and has established partnerships with automotive OEMs like BMW and Ford.
  • Toyota Motor Corporation ($TM) (In-house solid-state battery development), As a major automotive OEM, Toyota has significant internal research and development efforts in solid-state batteries, often cited as a leader in patent filings and aiming for commercialization in the mid-2020s. Their in-house development could reduce reliance on external suppliers like QuantumScape or become a direct competitor in battery supply.
  • ProLogium Technology (Solid-state battery technology (oxide-based electrolyte)), A well-funded Taiwanese solid-state battery developer that has secured partnerships with major automakers such as Mercedes-Benz and VinFast. ProLogium is also targeting EV applications with its oxide-based solid electrolyte technology, competing for OEM contracts and market share in the emerging solid-state battery space.
  • Factorial Energy (Solid-state battery technology (polymer-based electrolyte)), Another prominent solid-state battery startup, backed by Mercedes-Benz and Hyundai/Kia. Factorial Energy is developing a quasi-solid-state battery utilizing a solid polymer electrolyte, aiming to deliver higher energy density and safety for EVs, directly competing with QuantumScape for automotive OEM partnerships.
Moat:
QuantumScape operates in a highly competitive and capital-intensive race to commercialize solid-state batteries for electric vehicles. Their primary moat lies in their proprietary ceramic solid electrolyte separator and anode-free cell design, which promises significant advantages in energy density, fast charging, and safety over conventional lithium-ion batteries. They also benefit from a strong strategic partnership with Volkswagen. However, competition is fierce, coming from multiple angles: direct solid-state battery developers (e.g., Solid Power, ProLogium, Factorial Energy) employing different chemistries and manufacturing approaches; established lithium-ion battery manufacturers (e.g., CATL, LG Energy Solution) who are continuously improving their existing technology and investing in next-generation solutions; and even automotive OEMs (e.g., Toyota) developing their own battery technologies. The main challenge for QuantumScape, like all solid-state players, is the complex and costly transition from laboratory prototypes to high-volume, cost-effective mass production, while simultaneously securing long-term supply agreements with major automakers.
Income Statements:
Quarterly
Annual
    Unit: USD2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 
                        
      operating expenses:
                        
      research and development
    92,074,000 101,177,000 95,589,000 104,384,000 96,994,000 97,746,000 83,847,000 96,397,000 88,154,000 86,453,000 76,941,000 83,375,000 87,582,000 65,133,000 61,345,000 46,788,000 39,467,000 35,776,000 29,465,000  
      general and administrative
    22,919,000 22,409,000 27,986,000 24,307,000 33,164,000 36,711,000 48,054,000 28,243,000 32,716,000 37,089,000 33,037,000 30,059,000 33,072,000 30,740,000 29,312,000 20,349,000 14,365,000 13,846,000 15,210,000  
      total operating expenses
    114,993,000 123,586,000 123,575,000 128,691,000 130,158,000 134,457,000 131,901,000 124,640,000 120,870,000 123,542,000 109,978,000 113,434,000 120,654,000 95,873,000 90,657,000 67,137,000 53,832,000 49,622,000 44,675,000  
      income from operations
    -114,993,000 -123,586,000 -123,575,000 -128,691,000 -130,158,000 -134,457,000 -131,901,000 -124,640,000 -120,870,000 -123,542,000 -109,978,000 -113,434,000 -120,654,000 -95,873,000 -90,657,000 -67,137,000 -53,832,000 -49,622,000 -44,675,000  
      yoy
    -11.65% -8.09% -6.31% 3.25% 7.68% 8.84% 19.93% 9.88% 0.18% 28.86% 21.31% 68.96% 124.13% 93.21% 102.93%      
      qoq
    -6.95% 0.01% -3.98% -1.13% -3.20% 1.94% 5.83% 3.12% -2.16% 12.33% -3.05% -5.98% 25.85% 5.75% 35.03% 24.72% 8.48% 11.07%   
      other income:
                        
      interest expense
    -503,000 -516,000 -528,000 -540,000 -550,000 -562,000 -572,000 -582,000 -593,000 -602,000 -600,000 -592,000 -600,000 -607,000 -600,000 -822,000 -359,000 -238,000   
      interest income
    9,997,000 8,940,000 9,769,000 10,596,000 11,347,000 12,016,000 12,065,000 12,413,000 10,479,000 7,319,000 6,277,000 5,092,000 3,487,000 1,510,000 816,000 682,000 605,000 349,000 247,000  
      other income
    -325,000 464,000  3,973,000 -338,000 50,000  -530,000 382,000 318,000 -330,000 -119,000 114,000 133,000 88,000 50,000 3,000 -5,000 103,000  
      total other income
    9,169,000 8,888,000 9,152,000 14,029,000 10,459,000 11,504,000 11,273,000 11,301,000 10,268,000 7,035,000 5,347,000 4,381,000 3,001,000 1,036,000 304,000 -90,000 69,183,000 130,610,000 -30,414,000  
      net income
    -105,824,000 -114,698,000 -114,423,000 -114,662,000 -119,699,000 -122,953,000 -120,628,000 -113,339,000 -110,602,000 -116,507,000 -104,631,000 -109,053,000 -117,653,000 -94,837,000 -90,353,000 -67,227,000 15,351,000 80,988,000 -75,089,000  
      yoy
    -11.59% -6.71% -5.14% 1.17% 8.22% 5.53% 15.29% 3.93% -5.99% 22.85% 15.80% 62.22% -866.42% -217.10% 20.33%      
      qoq
    -7.74% 0.24% -0.21% -4.21% -2.65% 1.93% 6.43% 2.47% -5.07% 11.35% -4.05% -7.31% 24.06% 4.96% 34.40% -537.93% -81.05% -207.86%   
      less: net loss attributable to non-controlling interest, net of tax of 0
                  -1,000 -2,500     
      net loss attributable to common stockholders
    -105,824,000 -114,698,000 -114,423,000 -114,662,000 -119,572,000 -122,975,000 -120,648,000 -113,360,000 -110,617,000 -116,521,000 -104,647,000    -90,352,000    -75,079,000  
      other comprehensive income:
                        
      unrealized gain on marketable securities
    656,000 -213,000 -328,000 -511,000 1,458,000 868,000 1,490,000 3,446,000 3,392,000 2,640,000 5,518,000 -4,467,500 -2,933,000  -11,616,000 -3,579,000 65,000 -837,000 174,000  
      total comprehensive loss
    -105,168,000 -114,911,000 -114,751,000 -115,173,000 -118,241,000 -122,085,000 -119,138,000 -109,893,000 -107,210,000 -113,867,000 -99,113,000    -101,969,000    -74,915,000  
      less: comprehensive loss attributable to non-controlling interest
                 -8,000 -1,000 -2,500   -10,000  
      comprehensive loss attributable to common stockholders
    -105,168,000 -114,911,000 -114,751,000 -115,173,000 -118,114,000 -122,107,000 -119,158,000 -109,914,000 -107,225,000 -113,881,000 -99,129,000    -101,968,000    -74,905,000  
      basic and diluted net loss per share
    -0.18 -0.2 -0.21 -0.22 -0.23 -0.25 -0.24 -0.183 -0.23 -0.26 -0.24    -0.21    -0.2  
      basic and diluted weighted-average common shares outstanding
    588,728 561,698 548,006 508,102 508,957 501,232 496,145  471,752 445,324 440,085    429,335    368,783,516  
      less: net income attributable to non-controlling interest, net of tax of 0
        -127,000 22,000 20,000 21,000 15,000 14,000 16,000          
      less: comprehensive income attributable to non-controlling interest
        -127,000 22,000 20,000 21,000 15,000 14,000 16,000 13,000 7,000        
      other expense
      -89,000    -220,000              
      change in fair value of assumed common stock warrant liabilities
                    68,934,000 130,504,000 -30,764,000  
      less: net income attributable to non-controlling interest, net of tax of 0 for the three and nine months ended september 2022 and 2021
               -500 7,000        
      net income attributable to common stockholders
               -75,710,250 -117,660,000 -94,829,000  5,315,000 15,351,000 80,988,000   
      total comprehensive income
               -80,178,250 -120,586,000 -98,158,000  5,163,000 15,416,000 80,151,000   
      comprehensive income attributable to common stockholders
               -80,177,750 -120,593,000 -98,150,000  5,165,500 15,416,000 80,151,000   
      net income per share
                        
      basic
               -0.25 -0.27 -0.22  -0.16 0.04 0.2   
      diluted
               -0.25 -0.27 -0.22  -0.16 -0.13 -0.12   
      weighted-average shares used for eps calculation
                        
      basic
           462,239    432,973 434,051 431,523  404,259 417,829 404,957   
      diluted
           462,239    432,973 434,051 431,523  409,509 420,649 410,372   
      less: net loss attributable to non-controlling interest, net of tax of 0 for the three and six months ended june 2022 and 2021
                 -8,000       
      unrealized loss on marketable securities
                 -3,321,000       
      change in fair value of series f convertible preferred stock tranche liabilities
                        
      less: net loss attributable to non-controlling interest, net of tax of 0 for the three and six months ended june 30, 2021 and 2020
                        
      less: net loss attributable to non-controlling interest, net of tax of 0 for the three months ended march 31, 2021 and 2020
                      -10,000  
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 
                           
        assets
                           
        current assets
                           
        cash and cash equivalents
      225,826,000 172,451,000 153,555,000 140,866,000 174,705,000 196,388,000 192,321,000 142,524,000 250,824,000 232,840,000 241,210,000 235,393,000 297,960,000 343,368,000 283,013,000 320,700,000 346,156,000 402,391,000 762,341,000 113,216,000  
        marketable securities
      777,907,000 625,042,000 706,754,000 769,901,000 666,309,000 741,467,000 817,314,000 928,284,000 876,612,000 676,834,000 741,939,000 826,340,000 857,339,000 924,752,000 1,065,440,000 1,126,975,000 1,197,572,000 1,165,139,000 771,101,000 884,336,000  
        prepaid expenses and other current assets
      11,798,000 8,746,000 11,173,000 11,519,000 12,700,000 35,614,000 35,400,000 12,709,000 10,129,000 8,951,000 11,476,000 10,591,000 10,349,000 10,328,000 13,789,000 15,757,000 8,611,000 10,622,000 8,502,000 11,616,000  
        total current assets
      1,015,531,000 806,239,000 871,482,000 922,286,000 853,714,000 973,469,000 1,045,035,000 1,083,517,000 1,137,565,000 918,625,000 994,625,000 1,072,324,000 1,165,648,000 1,278,448,000 1,362,242,000 1,463,432,000 1,552,339,000 1,578,152,000 1,541,944,000 1,009,168,000 1,287,868 
        property and equipment
      250,323,000 266,391,000 289,465,000 299,992,000 317,509,000 321,534,000 315,644,000 313,164,000 321,903,000 323,872,000 311,358,000 295,934,000 268,225,000 233,778,000 200,744,000 166,183,000 135,677,000 91,217,000 59,533,000 43,696,000  
        right-of-use assets - operating lease
      35,134,000 48,795,000 50,144,000 51,472,000 52,689,000 53,979,000 54,596,000 55,863,000 57,112,000 58,343,000 59,566,000 60,782,000 62,254,000 63,494,000 57,729,000  22,911,000 23,382,000    
        right-of-use assets - finance lease
      20,112,000 20,830,000 21,549,000 22,267,000 22,985,000 23,703,000 24,422,000 25,140,000 25,858,000 26,577,000 27,295,000 28,013,000 28,731,000 29,450,000 30,168,000 30,886,000 37,290,000 38,105,000    
        other assets
      22,132,000 26,133,000 26,252,000 26,378,000 25,080,000 24,098,000 24,281,000 24,294,000 23,327,000 19,861,000 18,330,000 18,353,000 18,253,000 18,425,000 18,121,000 18,234,000 11,069,000 12,219,000 2,829,000 2,193,000  
        total assets
      1,343,232,000 1,168,388,000 1,258,892,000 1,322,395,000 1,271,977,000 1,396,783,000 1,463,978,000 1,501,978,000 1,565,765,000 1,347,278,000 1,411,174,000 1,475,406,000 1,543,111,000 1,623,595,000 1,669,004,000 1,715,648,000 1,759,286,000 1,743,075,000 1,616,337,000 1,066,769,000 231,363,467 
        liabilities and stockholders’ equity
                           
        current liabilities
                           
        accounts payable
      6,446,000 6,479,000 7,786,000 6,466,000 9,635,000 15,228,000 11,508,000 12,959,000 9,618,000 12,470,000 17,195,000 21,420,000 17,213,000 23,105,000 10,123,000 14,182,000 22,403,000 14,135,000 9,871,000 5,383,000 15,238 
        accrued liabilities
      13,994,000 18,428,000 22,176,000 17,447,000 19,674,000 66,530,000 72,331,000 10,180,000 10,025,000 8,206,000 10,395,000 7,477,000 15,224,000 4,948,000 8,823,000 6,078,000 6,370,000 3,663,000 4,160,000 2,701,000  
        accrued compensation and benefits
      19,551,000 14,998,000 13,332,000 32,212,000 22,848,000 22,368,000 8,738,000 26,043,000 18,938,000 19,684,000 9,269,000 13,061,000 9,062,000 8,724,000 7,830,000 9,119,000      
        operating lease liability, short-term
      4,558,000 5,862,000 5,693,000 5,526,000 5,387,000 5,208,000 5,110,000 5,006,000 4,886,000 4,618,000 3,987,000 3,478,000 3,394,000 2,577,000 1,253,000 1,209,000 1,552,000 1,519,000 1,465,000 1,220,000  
        finance lease liability, short-term
      3,493,000 3,405,000 3,319,000 3,233,000 3,149,000 3,067,000 2,986,000 2,907,000 2,829,000 2,753,000 2,677,000 1,373,000 501,000 461,000 20,000 19,000 152,000     
        total current liabilities
      48,042,000 49,172,000 52,306,000 64,884,000 60,693,000 112,401,000 100,673,000 57,095,000 46,296,000 47,731,000 43,523,000 46,809,000 45,394,000 39,815,000 28,049,000 30,607,000 36,282,000 25,271,000 21,354,000 12,350,000 1,336,785 
        operating lease liability, long-term
      35,728,000 49,983,000 51,474,000 52,913,000 54,374,000 55,646,000 56,256,000 57,622,000 58,881,000 60,168,000 61,481,000 62,560,000 63,643,000 64,753,000 58,822,000 36,760,000 22,102,000 22,516,000 11,344,000 11,244,000  
        finance lease liability, long-term
      29,216,000 30,113,000 30,995,000 31,865,000 32,710,000 33,518,000 34,314,000 35,098,000 35,859,000 36,585,000 37,300,000 38,005,000 38,688,000 39,337,000 39,978,000 39,378,000 44,120,000 38,708,000    
        other liabilities
      14,498,000 14,324,000 15,519,000 14,886,000 13,575,000 13,137,000 13,073,000 11,986,000 11,711,000 11,808,000 10,161,000 8,488,000 7,592,000 6,855,000 5,768,000 315,000      
        total liabilities
      127,484,000 143,592,000 150,294,000 164,548,000 161,352,000 214,702,000 204,316,000 161,801,000 152,747,000 156,292,000 152,465,000 155,862,000 155,317,000 150,760,000 132,617,000 107,060,000 102,504,000 234,950,000 320,737,000 23,594,000 9,386,785 
        commitment and contingencies
                           
        stockholders’ equity
                           
        preferred stock- 0.0001 par value...
                           
        common stock - 0.0001 par value...
      60,000 56,000 56,000 54,000 51,000 50,000 50,000 49,000 49,000 45,000 44,000 44,000 43,000 43,000 43,000 43,000 42,000 41,000 39,000 36,000  
        additional paid-in-capital
      4,908,604,000 4,612,488,000 4,581,379,000 4,515,879,000 4,353,487,000 4,305,018,000 4,260,514,000 4,221,892,000 4,184,840,000 3,855,602,000 3,809,459,000 3,771,181,000 3,734,584,000 3,699,039,000 3,664,433,000 3,634,665,000 3,612,054,000 3,478,814,000 3,346,442,000 2,437,242,000  
        accumulated other comprehensive income
      543,000 -113,000 100,000  939,000              143,000 -31,000  
        accumulated deficit
      -3,693,459,000 -3,587,635,000 -3,472,937,000 -3,358,514,000 -3,243,852,000 -3,124,280,000 -3,001,305,000 -2,880,657,000 -2,767,297,000 -2,656,680,000 -2,540,159,000 -2,435,512,000 -2,326,446,000 -2,208,786,000 -2,113,957,000 -2,023,605,000 -1,956,379,000 -1,971,730,000 -2,052,718,000 -1,395,776,000 -1,525,451 
        total stockholders’ equity
      1,215,748,000 1,024,796,000 1,108,598,000 1,157,847,000 1,110,625,000 1,180,269,000 1,257,872,000 1,338,407,000 1,411,269,000 1,189,252,000 1,256,989,000 1,317,840,000 1,386,103,000 1,471,151,000 1,534,695,000 1,606,895,000 1,655,088,000 1,506,431,000 1,293,906,000 1,041,471,000  
        total liabilities and stockholders’ equity
      1,343,232,000 1,168,388,000 1,258,892,000                   
        liabilities, redeemable non-controlling interest and stockholders’ equity
                           
        redeemable non-controlling interest
           1,812,000 1,790,000 1,770,000 1,749,000 1,734,000 1,720,000 1,704,000 1,691,000 1,684,000 1,692,000 1,693,000 1,694,000 1,694,000 1,694,000 1,704,000  
        accumulated other comprehensive loss
         428,000  -519,000 -1,387,000 -2,877,000 -6,323,000 -9,715,000 -12,355,000 -17,873,000 -22,078,000 -19,145,000 -15,824,000 -4,208,000 -629,000 -694,000    
        total liabilities, redeemable non-controlling interest and stockholders’ equity
         1,322,395,000 1,271,977,000 1,396,783,000 1,463,978,000 1,501,978,000 1,565,765,000 1,347,278,000 1,411,174,000 1,475,406,000 1,543,111,000 1,623,595,000 1,669,004,000 1,715,648,000 1,759,286,000 1,743,075,000 1,616,337,000 1,066,769,000  
        commitments and contingencies
                           
        right-of-use assets- operating lease
                     36,913,000      
        assumed common stock warrant liabilities
                       148,455,000 288,039,000   
        accrued compensation
                      5,604,000 5,602,000 5,355,000 2,391,000  
        strategic premium, short-term
                      201,000 352,000 503,000 655,000  
        right-of-use lease asset
                        12,031,000 11,712,000  
        convertible preferred stock warrant liabilities
                           
        strategic premium, long-term and other liabilities
                           
        assets:
                           
        current assets:
                           
        cash
                          1,002,785 
        prepaid expenses
                          285,083 
        investments held in trust account
                          230,075,599 
        liabilities and stockholders' equity:
                           
        current liabilities:
                           
        accrued expenses
                          1,155,999 
        franchise tax payable
                          90,548 
        notes payable - related party
                          75,000 
        deferred underwriting commissions
                          8,050,000 
        class a common stock, 0.0001 par value...
                          216,976,680 
        stockholders' equity:
                           
        preferred stock, 0.0001 par value; 1,000,000 shares authorized; none issued and outstanding
                           
        class b common stock, 0.0001 par value...
                          575 
        additional paid-in capital
                          6,524,748 
        total stockholders' equity
                          5,000,002 
        total liabilities and stockholders' equity
                          231,363,467 
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 
                           
          operating activities
                           
          net loss
        -105,824,000 -114,698,000 -114,423,000 -114,662,000 -119,699,000 -122,953,000 -120,628,000 -113,339,000 -110,602,000 -116,507,000 -104,631,000    -90,353,000    -75,089,000 
          adjustments to reconcile net loss to net cash from operating activities:
                           
          depreciation and amortization
        14,169,000 19,470,000 18,335,000 17,986,000 14,943,000 12,869,000 11,983,000 10,781,000 11,644,000 10,028,000 9,505,000 9,305,000 8,469,000 5,782,000 4,724,000 3,575,000 2,477,000 2,954,000 2,201,000 
          amortization of right-of-use assets and non-cash lease expense
        1,745,000 2,068,000 2,046,000 2,030,000 2,013,000 1,982,000 1,985,000 1,966,000 1,950,000 1,942,000 1,933,000 2,172,000 1,973,000 1,906,000 1,792,000     
          amortization of premiums and accretion of discounts on marketable securities
        -4,583,000 -4,065,000 -5,048,000 -6,189,000 -7,445,000 -7,520,000 -8,159,000 -8,053,000 -5,343,000 -3,336,000 -2,176,000 -515,000 791,000 1,528,000 2,185,000 2,790,000 3,623,000 3,022,000 2,410,000 
          stock-based compensation expense
        29,223,000 26,255,000 40,639,000 34,182,000 43,359,000 47,825,000 19,287,000 37,924,000 40,391,000 49,992,000 37,990,000 34,125,000 33,578,000 30,926,000 28,481,000 16,165,000 12,727,000 11,607,000 11,676,000 
          write-off of fixed assets
        9,522,000                   
          other
        -2,657,000 -319,000 40,000 -77,000 -1,166,000 1,245,000 107,000 -5,000 -27,000 -98,000 599,000 366,000 -134,000 48,000 560,000 676,000 336,000   
          changes in operating assets and liabilities:
                           
          prepaid expenses and other current assets and other assets
        -1,988,000 2,636,000 472,000 -116,000 21,933,000 -31,000 -22,679,000             
          accounts payable, accrued liabilities and accrued compensation and benefits
        -2,185,000 -5,328,000 -1,532,000 -1,019,000 -47,335,000 1,755,000 61,564,000             
          operating lease liability
        -1,098,000 -1,322,000 -1,272,000 -1,342,000 -1,184,000 -1,272,000 -1,261,000 -1,140,000 -1,019,000   -1,155,000 -175,000   -34,000 -364,000 -459,000 -345,000 
          other liabilities
        -58,000 -1,425,000 -6,000 -1,264,000 246,000 949,000 -144,000             
          net cash from operating activities
        -63,734,000 -61,840,000 -60,749,000 -58,657,000 -92,802,000 -65,151,000 -57,945,000 -57,474,000 -62,557,000 -57,675,000 -62,319,000 -62,916,000 -56,375,000 -51,332,000 -47,401,000 -44,607,000 -28,867,000 -32,899,000 -21,536,000 
          capital expenditures
        -12,047,000 -5,881,000 -1,211,000 -12,615,000 -24,848,000 -17,071,000 -4,348,000 -10,537,000 -20,103,000 -28,741,000 -14,575,000 -33,477,000 -58,122,000 -17,514,000 -31,540,000 -44,782,000 -30,107,000 -26,240,000 -4,325,000 
          free cash flows
        -75,781,000 -67,721,000 -61,960,000 -71,272,000 -117,650,000 -82,222,000 -62,293,000 -68,011,000 -82,660,000 -86,416,000 -76,894,000 -96,393,000 -114,497,000 -68,846,000 -78,941,000 -89,389,000 -58,974,000 -59,139,000 -25,861,000 
          investing activities
                           
          purchases of property and equipment
        -9,858,000 -8,308,000 -5,835,000 -11,162,000 -17,926,000 -18,923,000 -14,120,000 -13,802,000 -17,976,000 -24,720,000 -28,012,000 -37,841,000 -54,079,000 -27,631,000 -39,294,000 -44,782,000 -38,741,000 -30,386,000 -13,269,000 
          proceeds from sale of property and equipment
                           
          proceeds from maturities of marketable securities
        293,100,000 256,344,000 281,220,000 338,270,000 252,744,000 509,204,000 384,639,000 339,400,000 249,645,000 261,440,000 191,043,000 203,020,000 215,150,000 200,740,000 218,500,000 283,220,000 200,005,000 300,000,000 111,000,000 
          proceeds from sales of marketable securities
           1,245,000 1,477,000 1,992,000 13,113,000 51,765,000 50,838,000   
          purchases of marketable securities
        -440,726,000 -170,780,000 -213,352,000 -436,181,000 -168,686,000 -424,970,000 -265,265,000 -379,566,000 -440,681,000 -190,358,000 -100,422,000 -167,304,000 -151,460,000 -66,895,000 -183,892,000 -270,772,000 -286,828,000   
          net cash from investing activities
        -156,378,000 77,256,000 62,033,000 -109,073,000 66,132,000 65,311,000 106,499,000   46,362,000 64,086,000 -2,125,000 9,611,000 108,206,000 8,427,000 19,431,000 -74,726,000 -428,378,000 97,839,000 
          financing activities
                           
          proceeds from exercise of stock options and employee stock purchase plan
        7,986,000   6,123,000 7,398,000   4,092,000 2,297,000   2,473,000 1,967,000       
          proceeds from issuance of common stock
        267,621,000                   
          common stock issuance costs paid
        -4,160,000                   
          principal payment for finance lease
        -808,000 -796,000 -784,000 -761,000 -726,000 -715,000 -705,000 -683,000 -650,000           
          dissolution of joint venture
                          
          net cash from financing activities
        270,639,000 3,480,000 11,405,000 133,891,000 4,987,000 3,907,000 1,243,000 3,142,000 290,078,000 2,943,000 4,050,000 2,473,000 1,357,000 3,481,000 1,287,000 6,744,000 46,165,000 110,826,000 572,822,000 
          net increase in cash, cash equivalents and restricted cash
        50,527,000 18,896,000 12,689,000 -33,839,000 -21,683,000 4,067,000 49,797,000 -108,300,000 18,509,000 -8,370,000 5,817,000 -62,568,000 -45,407,000 60,355,000 -37,687,000 -18,432,000 -57,428,000 -350,451,000 649,125,000 
          cash, cash equivalents and restricted cash at beginning of period
        158,914,000 160,572,000 252,916,000 338,223,000 -1,000 1,000 115,409,000 
          cash, cash equivalents and restricted cash at end of period
        50,527,000 18,896,000 171,603,000 -33,839,000 -21,683,000 4,067,000 210,369,000 -108,300,000 18,509,000 -8,370,000 258,733,000 -62,568,000 -45,407,000 60,355,000 300,536,000 -18,433,000 -57,428,000 -350,450,000 764,534,000 
          supplemental disclosure:
                           
          cash paid for interest
        503,000 516,000 528,000 540,000 550,000 562,000 572,000 583,000 593,000   403,000 600,000   92,000   
          purchases of property and equipment, not yet paid
        -2,189,000 2,427,000 4,624,000 -1,453,000 -6,922,000 1,852,000 9,772,000 3,265,000 -2,127,000 -4,021,000 13,437,000 4,364,000 -4,043,000 10,117,000 7,754,000     
          common stock issuance costs, not yet paid
                           
          proceeds from exercise of stock options
          11,182,000    1,948,000    4,050,000    1,287,000  1,880,000 8,572,000 880,000 
          proceeds from issuance of common stock, net of issuance costs paid
          1,007,000     -267,000        -899,000 463,825,000 
          common stock issuance costs, accrued but not paid
          110,000                899,000 
          write-off of property and equipment
           11,814,000                
          supplemental disclosure of cash flow information
                           
          change in fair value of assumed common stock warrant liabilities
                       -68,934,000 -130,504,000 30,764,000 
          prepaid expenses and other assets
               -3,548,000 -4,118,000 995,000 -862,000 -345,000 155,000       
          accounts payable, accrued liabilities and accrued compensation
               2,640,000 -1,527,000   -3,905,000 8,815,000    2,345,000 764,000 4,252,000 
          other long-term liabilities
               114,000 -248,000   200,000       
          proceeds from exercise of warrants
                       39,113,000 3,185,000 109,133,000 
          proceeds from issuance of class a common stock pursuant to legacy quantumscape series f preferred stock purchase agreement, net of issuance costs
                         
          business combination, net of issuance costs paid
                           
          fair value of assumed common stock warrants exercised
                       79,521,000 9,080,000 432,424,000 
          impairment of fixed assets
                   5,889,000        
          net cash provided (used) by investing activities
                           
          accrued compensation and benefits
                  -7,554,000         
          accounts payable and accrued liabilities
                  3,446,000    3,957,000     
          operating lease liability and other
                  -569,000    460,000     
          change in fair value of convertible preferred stock warrant liabilities
                           
          change in fair value of convertible preferred stock tranche liabilities
                           
          proceeds from issuance of series f preferred stock, net of issuance costs
                           
          principal payment for finance lease, net of credit
                   -610,000       
          business combination transaction costs, accrued but not paid
                           
          net assets assumed from business combination
                           
          net income
                    -117,653,000    15,351,000   
          adjustments to reconcile net income to net cash from operating activities:
                           
          payment of business combination share issuance costs
                        -1,016,000 
          prepaid expenses and other current assets
                      2,082,000 -7,271,000 1,951,000 -2,011,000 2,479,000 
          accrued compensation
                      -1,289,000     
          amortization of right-of-use assets
                          371,000 
          proceeds from finance lease, net of principal payment
                       297,000 5,172,000   
          amortization of right-of-use assets- operating lease
                        471,000   
          amortization of right-of-use assets- finance lease
                        848,000   
          purchases of property and equipment, accrued but not paid
                        8,634,000 4,146,000 8,944,000 
          business combination expense, accrued but not paid
                           
          series f convertible preferred stock issuance cost, accrued but not paid
                           
          amortization of strategic premium
                         -151,000 -151,000 
          gain on property and equipment disposals
                          -104,000 
          proceeds from disposal of property and equipment
                          108,000 
          less: income attributable to class a ordinary shares subject to possible redemption
                           
          adjusted net income
                           
          weighted-average ordinary shares outstanding, basic and diluted
                           
          basic and diluted net income per ordinary share