Startup Sea is described as 'Discover new and interesting technology startups for web and mobile'. There are more than 10 alternatives to Startup Sea for Online / Web-based, iPhone, Mac, Windows and Linux. The best alternative is Kickstarter. It's not free, so if you're looking for a free alternative, you could try MintMe or Crowd Supply. Other great apps like Startup Sea are Crowdsourcer.io (Free), Donor Tools (Paid), Designbook (Free) and Go Get Funding (Free Personal).
Donorhut is a service for nonprofits, charities and organizations seeking help with raising funds online. Our service helps you simplify your fundraising efforts. All collected donations from your campaign are directly sent to your bank account.
Inventalator is a crowd-sourced development community that reduces the cost, risk, and complexity of product development for individuals who don’t have the time or resources to bring their invention to market by themselves.