What to Look For in a Live Coding Interview Platform
The five things that actually matter
After years of watching teams pick (and abandon) coding interview platforms, the same five criteria separate the tools you keep from the tools you tolerate.
1. Editor latency under network pressure
Test it on a hotel Wi-Fi, not on the demo laptop. A live coding tool that lags 200ms per keystroke makes candidates look worse than they are and biases your hiring against people on slower connections. Look for tools built on CRDT-based collaboration (Yjs is the de facto standard) — they degrade gracefully when the network blips.
2. Real multi-cursor editing
You should be able to type while the candidate is typing, in the same file, without overwriting each other. Most tools advertise this; only some actually deliver it. Run a literal pair-programming test in the trial.
3. Language and runtime breadth
Can the candidate run their code? Can they install a package? Can they hit a real database? Toy sandboxes work for FizzBuzz; they fall apart for any realistic task. Prefer platforms with full Linux containers over JavaScript-only sandboxes.
4. Integrity signal quality
The platform should give you, at minimum: keystroke timing for paste detection, video continuity, and a flag for tab switches. Without these, a live coding interview in 2026 is theater.
5. ATS and calendar fit
If the platform does not push results to your ATS, your interviewers will not look at them. If it does not pull availability from Google Calendar, your coordinators will hate it. Ignore "API available" — ask to see the live integration.
What does not matter
- Pretty themes
- 50 supported languages when your stack uses three
- AI interviewer features (almost universally worse than a real engineer)
How ClarityHire stacks up
ClarityHire is built on Monaco + Yjs for the editor, ships full container-backed code execution, runs the integrity signals above as first-class data, and pushes results to most major ATSes. Pricing starts free for one active job — try it on your next loop and run the five-criteria test.