Noise cancellation: Krisp wins outright. Whisply does not clean your mic and does not pretend to. If you work from a coffee shop and need the other side to hear you, Krisp or Apple's Voice Isolation in macOS Sequoia is the right tool. You can run Whisply alongside either.
Post-call summaries: Krisp produces a written recap after the meeting. Whisply does not. Whisply has a notes feature, but its job is the live moment, not the archive. If your workflow depends on a clean summary landing in your inbox at 4:03 PM, Krisp or a tool like Granola or Fathom is closer to what you want.
Real-time assist: This is the part Krisp does not really do. Whisply will recognize the question you were just asked, pull the relevant fact from your screen or from its model, and show it on the overlay before you finish saying um. That is the category Whisply created and the one most people are searching for when they realize Krisp's recap arrives too late to help.
Privacy posture: Krisp processes audio in its app and sends transcripts to its cloud for the AI features. Whisply keeps the overlay invisible to the room, does not put a bot in the call, and runs locally for the parts that have to be local. Both companies publish their stance. Read both before you pick.