W21
Acquired
ClipDrop
SaaS
Turn regular mobile photos into professional product visuals
YC W21
12 dead or acquired startups from batch W21 with completed research reports.
Every startup playbook in our database, ready to build
Each deep-dive includes a post-mortem, step-by-step rebuild plan, and a technical spec you can paste straight into Claude Code, Cursor, or Lovable.
W21
Acquired
Avenue
Developer Tools
Observability platform for operations teams
W21
Acquired
Emerge Tools
Artificial Intelligence
Supercharge your mobile apps
W21
Inactive
Fable
SaaS
The command center for product teams
W21
Acquired
Fountain9
Artificial Intelligence
Helping food brands and retailers reduce food wastage
W21
Inactive
Moxion Power Co.
Energy Storage
Mobile Energy Storage Technology
W21
Inactive
Nimbus
Artificial Intelligence
Nimbus reduces Datadog costs by more than 60% without Manual Effort
W21
Inactive
Noble
Fintech
Risk decisioning platform
W21
Acquired
Partnered
SaaS
The network where sales teams connect to share customer introductions.
W21
Inactive
Playmaker
Sports Tech
Community for fantasy sports players
W21
Acquired
Pyroscope
Developer Tools
Open source continuous profiling software to debug performance issues
W21
Inactive
Queenly
Marketplace
Leading marketplace for formalwear