# State machines consultant & XState architecture advisory

Canonical: https://davidk.dev/advisory/

Architecture advisory and consulting from David Khourshid, creator of XState.

## Engagements and starting prices (USD)
- **Expert hour**: $750 (per hour, prepaid). 60-minute minimum; Architecture questions, code walkthroughs, second opinions.
- **Architecture review**: from $15,000 (fixed scope, ~2 weeks). Deep review of your state architecture; Written report with prioritized recommendations; Readout call with your team.
- **Advisory day**: $6,000 (remote, or $8,000 on-site + travel). A full day working directly with your team; Design sessions, pairing, decision records.
- **Advisor retainer**: from $5,000 (per month, 3-month minimum). Async access over Slack or email; Two 45-minute calls per month; Billed quarterly in advance.
- **Embedded architect**: from $15,000 (per month, 3-month minimum). ~20 hours per month; Hands-on design and code review; Joins your planning rituals.
- **Enterprise XState support**: from $25,000 (per year, via Stately). SLA and priority issue handling; Upgrade and migration guidance; Delivered through Stately (stately.ai).