Comparison
Quick answer
Product managers own the product vision and roadmap — they decide what to build and why, prioritizing features based on user needs and business goals. Project managers own the execution plan — they determine how and when work gets done, managing scope, timeline, resources, and risk. Both roles are essential but work at different levels of the problem.
Product managers and project managers are not interchangeable. Confusing the roles leads to either a PM who is only tracking tickets (not driving product strategy) or a PM being asked to define what to build without any execution accountability. Software products need PMs to own 'what and why'; complex deliverable-driven projects (implementations, migrations, client projects) need PMs to own 'how and when.' Many organizations need both.
Hourly rate
$100–$350/hr
Standard range from senior developer consultants to fractional CTOs
Per session
$200–$700
For a focused technical advisory, architecture review, or vendor evaluation session
Monthly retainer
$5,000–$20,000/month
For fractional CTO engagements (typically 2–4 days/week)