Digiweb has said it will give free credit to elderly people about to lose their phone allowance if they switch to the telecoms company.
And Eircom said it would review its offerings to older people and other vulnerable users in light of the Budget cut to the €114-a-year phone allowance.
Around 300,000 pensioners, carers and disabled people are set to lose the free phone allowance from January in a move aimed at saving €44m a year.
Digiweb said its offer was worth €114 a year, and the €9.50-a-month free credit would run for as long as the customer stayed with the firm.
Eircom said that as the only Irish operator with a universal service obligation, it had to ensure affordability for communications services.
"Given the Government's Budget announcement, we are reviewing the range and scope of the services we have on offer to vulnerable users. We will discuss these matters further with Comreg," a spokesman said.
Eoin Clarke, of comparison site uSwitch.ie, said that most elderly people were on Eircom landlines and rival companies concentrated on getting people signed up for bundled broadband and homephone offers.
It could be quite confusing but there were savings of up to €200 a year to be made – but there was no point in signing up for a deal if you weren't going to make use of the broadband, he added.