v3.25.2
Cover - shares
 6 Months Ended
Jun. 30, 2025
Aug. 01, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Entity File Number 001-39799  
Entity Registrant Name Certara, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 82-2180925  
Entity Address, Address Line One 4 Radnor Corporate Center  
Entity Address, Address Line Two Suite 350  
Entity Address, City or Town Radnor  
Entity Address, State or Province PA  
Entity Address, Postal Zip Code 19087  
City Area Code 415  
Local Phone Number 237-8272  
Title of 12(b) Security Common stock, par value $0.01 per share  
Trading Symbol CERT  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   160,623,580
Document Fiscal Year Focus 2025  
Current Fiscal Year End Date --12-31  
Entity Central Index Key 0001827090  
Amendment Flag false  
Document Fiscal Period Focus Q2