The company, which provides services to a number of local governments in the US and is one of the bigger operations in this sector, said it became aware on Wednesday that its internal phone and IT systems had been compromised.
With the US presidential election just 39 days away, Tyler hastened to assure the public that none of the affected software or services related to voting or the election.
"None of our products is a system of record for voting or any other election- or voting-related activities," it said in a statement attributed to no-one.
"Our open data solution is hosted offsite on AWS, not on Tyler's internal network that was impacted."
The company also assured its clients and their users that they would still be able to perform basic operations, such as making utility and court payments.
"Tyler's Online Services and Support teams have reviewed all the logs, monitoring, traffic reports, volume reports, and cases related to utility and court payments. There were no outages with any of our online payment systems and payment activity has functioned normally during this time," it said.