March 20, 2020

Gregory S. Bentley
Chairman, Chief Executive Officer and President
Bentley Systems, Incorporated
685 Stockton Drive
Exton, PA 19341

       Re: Bentley Systems, Incorporated
           Amendment No. 1 to Draft Registration Statement on Form S-1
           Submitted March 9, 2020
           CIK No. 0001031308

Dear Mr. Bentley:

        We have reviewed your amended draft registration statement and have the
following
comments. In some of our comments, we may ask you to provide us with
information so we
may better understand your disclosure. References to prior comments refer to
comments in our
letter dated February 13, 2020.

       Please respond to this letter by providing the requested information and
either submitting
an amended draft registration statement or publicly filing your registration
statement on
EDGAR. If you do not believe our comments apply to your facts and circumstances
or do not
believe an amendment is appropriate, please tell us why in your response.

      After reviewing the information you provide in response to these comments
and your
amended draft registration statement or filed registration statement, we may
have additional
comments.

Amendment No. 1 to Draft Registration Statement on Form S-1

Prospectus Summary, page 1

1.     We note your response to prior comment 1. Please revise to disclose the
actual number of
       accounts in both fiscal 2018 and 2019 rather than refer to over 34,000
accounts. Also,
       clarify whether a group of affiliated entities is always counted as a
single account.
2.     We note the revisions made in response to prior comment 13. First,
please revise to
       clarify whether there is any overlap between these lists such that one
of your accounts is
       both a top design firm and a top infrastructure owner. Second, please
disclose additional
       information on the industry reports you reference, including a brief
summary of the
       methodologies used to generate these rankings and the complete titles of
each report. In
 Gregory S. Bentley
Bentley Systems, Incorporated
March 20, 2020
Page 2
         this regard, we note that it appears the 2019 Engineering News Record
report covers the
         Top 500 Design Firms and that your disclosure only references the top
250 of these firms.
         Third, with respect to the Bentley Infrastructure 500 Top Owners
report, please clarify
         whether you authored or commissioned this report.
Management's Discussion and Analysis of Financial Condition and Results of
Operations
Key Business Metrics, page 66

3.       We note from your revised disclosures in response to prior comment 7
that you believe it
         is reasonable to annualize the last three months of revenue for your
recurring software
         subscriptions with consumption measurement period durations of less
than one year given
         your consistently high retention rate and stability of usage under
such subscriptions.
         While we acknowledge your retention rate disclosures for all recurring
revenue products,
         please provide us with this information for only your software
subscriptions with
         consumption measurement periods of less than one year for each period
presented.
Results of Operations
Comparison of the Years Ended December 31, 2018 and 2019, page 88

4.       We note your revised disclosures in response to prior comment 9 and we
have the
         following additional comments:
           Revise the tables preceding your revenues and cost of revenues
analysis on pages 88,
              90 and 91 to also reflect the change in GAAP revenues and cost of
revenues on an
              ASC 605 compared to ASC 606 basis and ensure such analysis
precedes any
              comparison on an ASC 605 to ASC 605 basis.
           Revise to quantify the impact of adoption of ASC 606 in your
analysis of changes in
              total revenues. Also, you appear to attribute such changes solely
to the adoption of
              ASC 606; while, your discussion of the change in revenue on an
ASC 605 basis
              addresses specific drivers such as organic growth, acquisitions
and foreign currency
              effects. Please tell us why you have not provided a similar
analysis on an ASC 605
              to ASC 606 basis.
           Revise to include a quantified analysis of changes in revenues by
geographic region
              and changes in total cost of revenue on an ASC 605 to ASC 606
basis.
Certain Relationships and Related Party Transactions
Rights in a Public Offering, page 153

5.     You disclose that you are required to sell, and Siemens is required to
purchase, together
       with prior purchases, an aggregate of $250 million worth of your Class B
common stock
       upon the consummation of this offering. Please disclose the remaining
dollar amount that
FirstName LastNameGregory S. Bentley
       Siemens must purchase and clarify when this purchase will be made.
Additionally, clarify
Comapany NameBentley Systems, Incorporated assumes or accounts for the issuance
of these
       whether your other prospectus disclosure
March shares, such as 2
       20, 2020 Page your dilution and beneficial ownership sections.
FirstName LastName
 Gregory S. Bentley
FirstName LastNameGregory S. Bentley
Bentley Systems, Incorporated
Comapany2020
March 20, NameBentley Systems, Incorporated
Page 3
March 20, 2020 Page 3
FirstName LastName
Stockholders Agreement, page 155

6.       Your response to prior comment 16 indicates that you do not believe
you are required to
         file a form of the amended and restated stockholders agreement as an
exhibit as you do
         not expect to be a party to this agreement that will go into effect
upon the completion of
         your offering. Please disclose the parties to the amended and restated
stockholders
         agreement. Given that the amended agreement will continue to govern
voting, transfer of
         shares and certain purchase rights of shareholders, please tell us why
you do not believe it
         is required to be filed under Item 601(b)(4) of Regulation S-K.
        You may contact David Edgar, Staff Accountant, at (202) 551-3459 or
Kathleen Collins,
Accounting Branch Chief, at (202) 551-3499 if you have questions regarding
comments on the
financial statements and related matters. Please contact Mitchell Austin, Staff
Attorney, at (202)
551-3574 or Jan Woo, Legal Branch Chief, at (202) 551-3453 with any other
questions.



                                                               Sincerely,

                                                               Division of
Corporation Finance
                                                               Office of
Technology
cc:      Richard Fenyes, Esq.