Azimio la Umoja now says that as of Tuesday morning, they had collected over six million signatures through their portal.
Narc Kenya leader Martha Karua urged Kenyans to continue signing up, to express dissatisfaction with the current government.
The announcement comes after the portal was updated on Monday following a technical hitch.
"We are pleased to announce, this morning, we have hit over six million signatures. Those are six million Kenyans fed up with the Ruto regime. Let's continue signing up," Karua said on Tuesday.
The website was launched to collect signatures to show public dissatisfaction with President William Ruto's administration.
In the restored website, Azimio has notably also changed the domain of the website to .net from the initial http:/www.tumechoka.com.
Earlier, the website was down and could only display templates with no tabs for signature collection.
ODM secretary general Edwin Sifuna claimed that the website had faced more than 1,000 attacks by people who were trying to hack into it.
"They are crying and saying the signature drive is going nowhere, but they are actively sabotaging the collection of signatures," he said.
"We have had over 1,000 attacks on our website that are being used for collection of signatures."
The SG said the attackers had cloned the website to confuse Azimio supporters.
