Understanding limits to ensure server performance
While you are able to invite unlimited candidates on Coderbyte, we do have several limits for server performance reasons. Less than 1% of our customers ever approach any of the limits.
Daily limits
There is a daily limit of 500 candidates across all assessments.
If you need higher daily limits, please inquire about our enterprise plan.
Concurrency limits
While you can invite up to 500 candidates per day, you cannot invite that many candidates simultaneously to take an assessment. There is a concurrency limit of 50 candidates that can take your assessments at a given time. This is an account-wide limit, not a limit per assessment.
This means you can invite 500 candidates at the same time, but only 50 will be allowed to enter and take an assessment. The rest will be in a virtual waiting room and told to retry entering the assessment in a few minutes.
Once candidates start leaving or completing the assessment, more candidates will be able to click begin to start their assessments.
Increasing your concurrency limits
You can increase your limits on a temporary basis for a one-time event (e.g. for a hackathon) or on permanent basis for high-volume evaluations (e.g. talent marketplace).
- Increase to 100 concurrency (+$299/month)
- Increase to 200 concurrency (+$399/month)
- Increase to 300 concurrency (+$499/month)
To increase your concurrency limit, go to Settings > Billing.
Scroll down and select the concurrency plan you want:
If you need higher concurrency, please inquire about our enterprise plan.