Cover [Abstract] Document Type Amendment Flag Entity Filer Category Entity Registrant Name Entity Central Index Key Entity Small Business Entity Emerging Growth Company Entity Ex Transition Period Statement of Financial Position [Abstract] Consolidated Balance Sheet: Statement [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Common Class B [Member] Common Class B [Member] Common Class A [Member] Common Class A [Member] Statement [Line Items] Statement [Line Items] Assets [Abstract] Assets Assets, Current [Abstract] Current assets: Assets, Current Total current assets Total current assets Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Contract with Customer, Asset, after Allowance for Credit Loss, Current Current portion of deferred contract costs Current portion of deferred contract costs Current portion of deferred contract costs Deferred contract costs Current Accounts Receivable, after Allowance for Credit Loss, Current Accounts receivable, net Accounts receivable, net Accounts receivable, net Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Property, Plant and Equipment, Net Property and equipment, net Property and equipment, net Total long-lived assets Deferred Income Tax Assets, Net Deferred tax asset Intangible Assets, Net (Excluding Goodwill) Intangible assets, net Goodwill Goodwill Business Combination, Recognized Identifiable Assets and Liabilities, Goodwill Beginning ,Goodwill Ending, Goodwill Assets Total assets Total assets Other Assets, Noncurrent Other assets Contract with Customer, Asset, after Allowance for Credit Loss, Noncurrent Deferred contract costs, net of current portion Deferred contract costs, net of current portion Deferred contract costs, net of current portion Long-term deferred contract costs Non-current Liabilities and Equity [Abstract] Liabilities and Equity Liabilities, Noncurrent [Abstract] Long term liabilities: Deferred Revenue, Noncurrent Deferred revenue Long-term Debt, Excluding Current Maturities Term loan, net of current portion Long-term debt Other Liabilities, Noncurrent Other long-term liabilities Liabilities Total liabilities Total liabilities Liability for Uncertainty in Income Taxes, Noncurrent Tax receivable agreements liability Deferred Income Tax Liabilities, Net Deferred tax liabilities Liabilities, Current [Abstract] Current liabilities: Members Distribution Payable Members' distribution payable Members distribution payable. Deferred Revenue, Current Current portion of deferred revenue Current portion of deferred revenue Debt, Current Current portion of term loan Debt current Liabilities, Current Total current liabilities Total current liabilities Accounts Payable, Current Accounts payable Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities Accrued expenses and other current liabilities. Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Stockholder's equity Common Stock, Value, Issued Common stock, par value Additional Paid in Capital Additional paid in capital Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total stockholder's equity Balance at Beginning Balance at Ending Retained Earnings (Accumulated Deficit) Accumulated deficit Stockholders' Equity Attributable to Noncontrolling Interest Noncontrolling interests Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Liabilities and Equity Total liabilities and equity Total liabilities and members' capital Total liabilities and equity Legal Entity [Axis] Entity [Domain] Equity Components [Axis] Equity Component [Domain] Member Units [Member] Member Units [Member] Definitive Healthcare Corp [Member] Definitive Healthcare Corp [Member] Definitive healthcare corp [Member]. General Partners' Capital Account, Units Authorized Units Authorized Authorized Class B units General Partners' Capital Account, Units Issued Units Issued Issued Class B units General Partners' Capital Account, Units Outstanding Units Outstanding Outstanding Class B units (Vested Class B units) Common Stock, Par or Stated Value Per Share Common stock par or stated value per share Common Stock, Shares Authorized Common stock shares authorized Common Stock, Shares Authorized Common Stock, Shares, Outstanding Common stock shares outstanding Common Stock, Shares, Outstanding Common Stock, Shares, Issued Common stock shares issued Common Stock, Shares, Issued Income Statement [Abstract] Operating Expenses [Abstract] Operating expenses: Selling and Marketing Expense Sales and marketing Sales and marketing Research and Development Expense Product development General and Administrative Expense General and administrative Depreciation, Depletion and Amortization, Nonproduction Depreciation and amortization Business Combination, Acquisition Related Costs Transaction expenses Operating Expenses Total operating expenses Total operating expenses Operating Income (Loss) Loss from operations Income (loss) from operations Net Income (Loss) Attributable to Parent, Diluted Net loss attributable to Definitive Healthcare Corp Earnings Per Share [Abstract] Net loss per share of Class A Common Stock: Earnings Per Share [Abstract] Earnings Per Share, Basic and Diluted Basic and diluted Net loss per share, basic and diluted Revenues Revenue Related party transaction, Revenue Cost of Revenue [Abstract] Cost of revenue: Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization Cost of revenue exclusive of amortization shown below Cost, Amortization Amortization Gross Profit Gross Profit Gross profit Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] Weighted average Common Stock outstanding: Weighted Average Number of Shares Outstanding, Basic and Diluted Basic and diluted Weighted average number of shares of Class A outstanding Nonoperating Income (Expense) [Abstract] Other expense, net: Interest Expense Interest expense, net Interest expense Nonoperating Income (Expense) Total other expense, net Total other expense, net Foreign Currency Transaction Gain (Loss), before Tax Foreign currency transaction gain Extinguishment of Debt, Gain (Loss), Net of Tax Loss from extinguishment of debt Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Net Loss Net Income loss Attributable to Reorganization Transactions Less: net loss attributable to Definitive OpCo prior to the Reorganization transactions Net income loss attributable to reorganization transactions. Net Income (Loss) Attributable to Noncontrolling Interest Less: Net loss attributable to noncontrolling interests Statement of Comprehensive Income [Abstract] Net Income (Loss) Attributable to Parent Net loss Net loss subsequent to Reorganization Transactions Net income (loss) Net loss Net loss attributable to Definitive Healthcare Corp. Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive loss: Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Foreign currency translation adjustments Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Comprehensive loss attributable to Definitive Healthcare Corp Comprehensive Income Loss Before Reorganization Transactions and noncontrolling Interests Comprehensive loss Comprehensive income loss before reorganization transactions and noncontrolling interests. Comprehensive Income Loss Before Noncontrolling Interests Less: Net loss attributable to Definitive OpCo prior to the Reorganization Transactions Comprehensive income loss before noncontrolling interests. Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Less: Comprehensive loss attributable to noncontrolling interests Statement of Stockholders' Equity [Abstract] Legacy Class A [Member] Legacy Class A [Member] Legacy Class A Legacy Class B [Member] Legacy Class B [Member] Legacy Class B Partners' Capital Account, Distributions Distribution to members Partners' Capital Balance at Ending Balance at Beginning Partners' Capital Account, Units Balance at Ending, shares Balance at Beginning, shares Partners Capital Account, Recapitalization Value Recapitalization (See Note 12) Partners' Capital Account, Recapitalization Value. Partners' Capital Account, Contributions Capital contribution (See Note 3 and 12) Total contributed capital Partners' Capital Account, Units, Contributed Capital contribution (See Note 3 and 12), Shares Contributed capital units, issued Partners' Capital Account, Unit-based Payment Arrangement, Number of Units Vesting of Class B Units and unit-based compensation, Shares Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive loss Partners Capital Account Recapitalization In Shares Recapitalization (See Note 12), Shares Partners capital account recapitalization in shares. Partners' Capital Account, Unit-based Payment Arrangement, Amount Vesting of Class B Units Unrecognized unit-based compensation expense Increase (Decrease) in Partners Capital due to Adoption of Accounting Standards Adoption of ASC 606 (See Note 2) Increase (decrease) in partners capital due to adoption of accounting standards Increase decrease in partners capital due to adoption of accounting standards. Distributions To Members Prior To Reorganization Transactions Distributions to members prior to Reorganization Transactions Distributions to members prior to reorganization transactions. Impacts Of Reorganization Transactions And Initial Public Offering Ipo [Abstract] Impacts of Reorganization Transactions and Intial Public Offering IPO Impacts of reorganization transactions and initial public offering ipo. Initial Effect Of The Reorganization Transactions Initial effect of the Reorganization Transactions and IPO on noncontrolling interests Initial effect of the reorganization transactions. Initial Effect Of The Reorganization Transactions, Shares Initial effect of the Reorganization Transactions and IPO on noncontrolling interests , Shares Initial effect of the reorganization transactions, shares. Stock Issued During Period, Value, New Issues Issuance of Class A Common Stock in IPO, net of costs Stock Issued During Period, Shares, New Issues Issuance of Class A Common Stock in IPO, net of costs, Shares Stock issued during period, shares APIC, Share-based Payment Arrangement, Increase for Cost Recognition Equity-based compensation subsequent to Reorganization Transactions Stock Repurchased During Period, Value Repurchase of Definitive Healthcare Corp. shares in connection with the IPO Stock Repurchased During Period, Shares Repurchase of Definitive Healthcare Corp. shares in connection with the IPO, Shares Stock repurchased during period, shares Repurchase of Partner Units Value Repurchase of Definitive OpCo units in connection with IPO Repurchase of partner units value. Repurchase of Partner Units Shares Repurchase of Definitive OpCo units in connection with IPO, Shares Repurchase of partner units shares. Other Comprehensive Income (Loss), Net of Tax Other comprehensive income subsequent to Reorganization Transactions and IPO Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Forfeited incentive units, Shares Vested Incentive Units Value Vested incentive units, value Vested incentive units, value. Employee Benefits and Share-based Compensation Equity-based compensation Members Contributions Prior To Reorganization Transactions Members' contributions prior to Reorganization Transactions Members contributions prior to reorganization transactions. Shares, Outstanding Balance at Ending , Shares Net Loss Prior To Reorganization Transactions Net loss prior to Reorganization Transactions Net loss prior to reorganization transactions. Other Comprehensive Income (Loss) Prior To Reorganization Transactions Other comprehensive income (loss) prior to Reorganization Transactions Other comprehensive income (Loss) prior to reorganization transactions. Equity Based Compensation Prior To Reorganization Transactions Equity-based compensation prior to Reorganization Transactions Equity based compensation prior to reorganization transactions. AOCI Attributable to Parent [Member] AOCI Attributable to Parent [Member] Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Noncontrolling Interest [Member] Noncontrolling Interests [Member] Retained Earnings [Member] Retained Earnings [Member] Stock Issuance Cost Net Stock issuance cost net. Capital Unit, Class A [Member] Sale of Stock [Axis] Sale of Stock [Axis] Sale of Stock [Domain] Sale of Stock [Domain] IPO [Member] IPO [Member] Statement of Cash Flows [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to net cash provided by (used in) operating activities: Depreciation and Amortization Amortization of Debt Issuance Costs Amortization of debt issuance costs Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows used in investing activities: Payments to Acquire Property, Plant, and Equipment Purchases of property, equipment, and other assets Payments to Acquire Businesses, Net of Cash Acquired Cash paid for acquisitions, net of cash acquired Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Asset Changes in fair value of contingent consideration Amortization of Deferred Charges Amortization of deferred contract costs Share-based Payment Arrangement, Noncash Expense Equity-based compensation Paid-in-Kind Interest Noncash paid in kind interest expense Debt, paid in kind interest Accounts Receivable, Credit Loss Expense (Reversal) Provision for doubtful accounts receivable Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Accounts Receivable Accounts receivable Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other current assets Increase (Decrease) in Deferred Charges Deferred contract costs Increase (Decrease) in Accounts Payable and Accrued Liabilities Accounts payable, accrued expenses and other current liabilities Increase (Decrease) in Deferred Revenue Deferred revenue Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows provided by (used in) financing activities: Proceeds from Delayed Draw Term Loan Proceeds from Delayed Draw Term Loan Proceeds from delayed draw term loan. Proceeds from Long-term Lines of Credit Proceeds from revolving credit facility Payment for Contingent Consideration Liability, Financing Activities Payment of contingent consideration Payment of contingent consideration Proceeds from Issuance or Sale of Equity Proceeds from equity offering, net of underwriting discounts Payments for Repurchase of Equity Repurchase of outstanding equity / Definitive OpCo units Payments of Stock Issuance Costs Payments of IPO issuance costs Repayments of Unsecured Debt Repayments of term loans Proceeds from Issuance of Unsecured Debt Proceeds from Term Loan Net Cash Provided by (Used in) Financing Activities Net cash provided by financing activities Repayments of Long-term Lines of Credit Repayments on Revolving Line of Credit Repayments debt financing Payments of Debt Issuance Costs Payment of debt issuance costs Payments of Capital Distribution Member distributions Proceeds from Partnership Contribution Member contributions Gain (Loss) on Extinguishment of Debt Loss on extinguishment of debt Loss on extinguishment of debt Amortization Of Deferred Contract Costs Amortization of intangible assets Amortization of deferred contract costs. Supplemental Disclosure Of Non Cash Financing Activities [Abstract] Supplemental disclosure of non-cash financing activities: Supplemental disclosure of non cash financing activities. Stock Issued Increase in unpaid public offering costs Supplemental Cash Flow Information [Abstract] Supplemental cash flow disclosures: Cash paid [Abstract] Cash paid during the year for: Cash paid Noncash Investing and Financing Items [Abstract] Supplemental disclosure of non-cash investing activities: Capital Expenditures Incurred but Not yet Paid Net decrease in accrued capital expenditures, including purchases of data Liabilities Assumed Accrued purchases of data Interest Paid, Excluding Capitalized Interest, Operating Activities Cash paid for interest Income Taxes Paid Cash paid for income taxes Supplemental Disclosures of Investing Activities [Abstract] Supplemental disclosures of investing activities: Supplemental Disclosures of Investing Activities Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed) [Abstract] Acquisitions: Consideration Paid to Former Members Included In Accrued Expenses Consideration paid to former members included in accrued expenses Consideration paid to former members included in accrued expenses. Cost, Depreciation and Amortization Net cash paid Noncash or Part Noncash Acquisition, Capital Contribution Net assets acquired, net of cash acquired Noncash or part noncash acquisition capital contribution.