When comparing Steam Greenlight vs Humble Store, the Slant community recommends Humble Store for most people. In the question“What are the best distribution platforms for an indie desktop game?” Humble Store is ranked 4th while Steam Greenlight is ranked 5th.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Greenlight Concepts section can help get early feedback
The Concepts section of Greenlight allows incomplete projects to be put on display and receive feedback, including mock-voting as if they were full Greenlight submissions. This can be a valuable tool for refining design, presentation and marketing techniques.
Pro The largest and best-known PC distribution service
Steam's user base is over ten times that of the next nearest competitor, making it by far the largest single marketplace.
Pro Access to sales data
Pro Just above average revenue split (75/25)
Pro Opportunity for homepage feature of your game with a launch sale after a short “soft-launch” period
Once Humble has had a chance to ensure your game page has all the kinks out, you can be featured by offering a new release sale.
Cons
Con Registration costs $100
In order to submit games to Greenlight at all, you must first purchase a $100 activation for your Steam account. Note that this does not represent profit for Valve: all proceeds are donated to charity. It is strictly a barrier to entry.
Con Approval process is a competitive market
The Greenlight submissions with the most votes are approved in arbitrary batches, generally 50 to 100 per month. No metric is used other than raw quantity of positive votes.
Con No access to customer email addresses
If you want to tell your fans about your new game, too bad unless you've collected it through your game client or somewhere else.