STORY: The ruling Georgian Dream party, which the protesters say has links with Russia, secured passage of the bill on first reading this week. It would require organizations that receive more than 20% of funding from abroad to register or face fines.
The protesters say the bill mimics Russian legislation which has been used since 2012 to silence dissent.
"When it starts with certain organizations - like (what) happened in Russia - tomorrow it will be about persons," said journalist Mikheil Gvadzabia, 24, speaking in English. "They (the demonstrators) don't want Russian laws in Georgia."
The ruling party says the law would help root out those working against the interests of the country and the powerful Georgian Orthodox Church.