The ThetaSwap just started on their network. Theta is one member of the small group of survivors of ICO-season in 2017. Their dex works similarly to the Uniswap, but with the TNT20 tokens. Also, they have a MetaMask-like browser wallet for easy connecting.
Theta’s main net had launched last year, and now they just start their defi-experience. They have smart contracts, custom tokens, and defi protocols now. All three make it more attractive on the market.