Financial details were not disclosed, but Moniker will continue to be run out of Pompano Beach and keep its chief executive and founder, Monte Cahn.
According to Moniker, Cahn has agreed to a "multi-year commitment'' with Oversee by running Moniker and having an role with executive matters at Oversee.
Moniker's services include domain name registration, domain asset management and it hosts live and online domain name auctions.
Founded in 2000, Oversee acquired domain name auction firm SnapNames in June. SnapNames was also founded in 2000 and sells domain names that are expired or about to be deleted.
With both Moniker and SnapNames under its belt, Oversee said it expects to become a top firm in the domain name secondary-ownership market.
With the merger, domain auctions will be managed by Moniker, with the use of SnapNames Live technology, according to a press release.
Although the Internet domain name business is young, it is projected to be worth close to $2 billion, according to Cahn.
Here's a video of Cahn talking about Moniker, taken at the Affiliate Summit Conference: