Start free with kotobase
A tenant-scoped Knowledge Graph BaaS. Create your graph tenant, then upgrade to a paid tier when you outgrow the free quota (100 MB, 3 pins).
How signup works. kotobase authenticates every tenant with your existing gftd identity — a authn.gftd.ai session or a self-signed CACAO. Click Start free to sign in / create your identity, then pick a plan to open a Stripe checkout scoped to your tenant DID.
1. Create your identity
Uses your existing gftd account (or creates one) at authn.gftd.ai. No new password for kotobase.
2. Choose a plan
Free needs no card. Standard / Pro open a tenant-scoped Stripe checkout.
Prefer the API? See the full docs or Using kotobase as a pin service.