Beta — limited spots
Every founder needs
someone to spar with.
Spar is your AI co-founder. It knows your business deeply, challenges your assumptions, remembers what you told it 6 months ago, and never just agrees with you.
Persistent memory that compounds over time
Challenges decisions — doesn't just validate them
Detects contradictions against your stated goals
Tone-calibrated to how you think best
$99/month|60-day free trial
Built for founders who think out loud
2,000
tokens of memory per prompt
Costs stay flat as users age
3-tier
memory architecture
Core + Active + Deep Archive
500+
facts per power user
Retrieved by semantic relevance