Why not? You can add as many autoresponder accounts as you want under your "Account & Settings". Presently, we have the commonly used autoresponder accounts configured into OptinLabs system.
Namely, GetResponse, Aweber, iContact, SendLane, ConvertKit, ConstantContact, InfusionSoft, MailChimp, FlutterMail and ActiveCampaign. And, if you do not find your auto responder listed here, you can add Custom HTML code from your account and integrate it to OptinLabs app.
All you have to do, go to "Account & Settings > My Account" and click on "Connect New Account".
To learn how to connect your autoresponder account, click here.