All Side Hustle Ideas

Software and apps side hustle ideas

A web app, SaaS, mobile app, browser extension, bot or API that people pay for or that earns from ads.

Startup cost
Under $100$100 to $1k$1k to $10kOver $10k
Time
Hands-offA few hours a weekPart-timeNear full-time
Where
OnlineIn personOnline and in person
Earns from
AdsAffiliateSubscriptionsOne-time salesService feesRentMarketplace cutSponsors and donations
Coding
No coding neededNeeds coding

2 ideas

  • Software and apps
    Paid online community for a niche audience
    A members-only group charges a recurring or lifetime fee for access to a niche audience and its resources. The host promotes it from an existing audience.
    Online
    The Koerner Office, 2025
  • Software and apps
    Royalties from programming books
    Earns ongoing royalties from programming books written years ago, with little active work now.
    Hands-offOnline
    Hacker News, 2016