<PAGE>

                                                                      Exhibit 99

                                  Certification

     I, Richard W. Talarico, as Chief Executive Officer of Allin Corporation
(the "Company"), certify that:

     1.   to my knowledge, the Company's report on Form 10-Q for the fiscal
          quarter ended June 30, 2002, as filed with the United States
          Securities and Exchange Commission (the "Report"), fully complies with
          the requirements of Section 13(a) of the Securities Exchange Act of
          1934, as amended; and

     2.   to my knowledge, the information in the Report fairly presents, in all
          material respects, the financial condition and results of operations
          of the Company.

     This Certification is provided pursuant to, and only for the purposes set
forth in, Section 906 of the Sarbanes-Oxley Act of 2002 and should not be relied
upon for any other purpose.

August 13, 2002                             /s/ Richard W. Talarico
------------------                      -------------------------------
                                            Chief Executive Officer


                                 Certification

     I, Dean C. Praskach, as Chief Financial Officer of Allin Corporation (the
"Company"), certify that:

     3.   to my knowledge, the Company's report on Form 10-Q for the fiscal
          quarter ended June 30, 2002, as filed with the United States
          Securities and Exchange Commission (the "Report"), fully complies with
          the requirements of Section 13(a) of the Securities Exchange Act of
          1934, as amended; and

     4.   to my knowledge, the information in the Report fairly presents, in all
          material respects, the financial condition and results of operations
          of the Company.

     This Certification is provided pursuant to, and only for the purposes set
forth in, Section 906 of the Sarbanes-Oxley Act of 2002 and should not be relied
upon for any other purpose.

August 13, 2002                             /s/ Dean C. Praskach
------------------                      -------------------------------
                                            Chief Financial Officer

