Good timing is less about company size and more about decision risk.
A Series A company and a Fortune 500 business can both need fractional CTO support if the next decision has high technical leverage and nobody internal has made that decision before.
Strong signs
- Leadership hears technical explanations but not business-readable tradeoffs.
- Technology spend is increasing while delivery speed or reliability gets worse.
- A vendor relationship has become strategic but no one is validating the work independently.
- AI pressure is rising but data quality, workflow ownership, and risk controls are unclear.
- The company needs technical credibility for investors, board members, or acquisition diligence.
Weak signs
If the problem is simply too few engineers, hire engineers. If engineering is the core product and daily leadership is missing, hire full-time. If the question is narrow, a consultant or short assessment may be enough.