Plans & pricing
Your security profile sets your append quota, token count, namespace count, and whether checkpoint signing is enabled. Agents and API tokens inherit your plan — and every tier is post-quantum with zero-knowledge key custody.
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Free
Evaluate and build. Never expires.
$0
- 2,000 appends / mo
- 1 namespaces
- 1 API tokens
- 30 req/min
- Checkpoint signing
- Live support, end-to-end encrypted
- Email support
Pro
Signed checkpoints for real workloads.
$20 /mo
- 100,000 appends / mo
- 5 namespaces
- 5 API tokens
- 120 req/min
- Checkpoint signing
- Live support, end-to-end encrypted
- Email support
Agent
Machine-cadence publishing and fleets.
$99 /mo
- 2,000,000 appends / mo
- 25 namespaces
- 25 API tokens
- 600 req/min
- Checkpoint signing
- Live support, end-to-end encrypted
- Email support
Enterprise
Custom limits, per-tenant host, SLA.
Contact
- Unlimited appends / mo
- Unlimited namespaces
- Unlimited API tokens
- Unlimited rate
- Checkpoint signing
- Live support, end-to-end encrypted
- Email support
Usage & overage
Usage billing that never interrupts an integration
Quotas reset monthly on your account anniversary — your subscription anniversary once you subscribe. What happens past the quota depends on your tier.
Hard-capped free tier
Free is hard-capped: appends past the quota are declined until the period resets. Upgrade to Pro for metered overage that never interrupts your integration.
Soft caps, metered overage
On Pro and Agent, appends keep working past your included quota and are billed at $0.50 (Pro) or $0.20 (Agent) per 1,000 appends. You are never hard-stopped mid-integration.
Opt-in auto-upgrade
Turn on automatic tier upgrade and we move you to the next tier only when it would cost you less than your projected overage. Off by default, reversible, and at most one upgrade per period.
Zero-knowledge, on every tier
Usage is an aggregate append count tied to your subscription only, never your entries, labels, or keys. Your private keys are generated and sealed in your browser and never reach our servers — billing is control-plane only.
Build on free, upgrade when you ship.
The free tier is a real, useful append-only directory, not a trial: one namespace, monthly appends, and full read/verify proofs. No card required.