Contact · PG-24 # Contact & early access Join the waitlist, or talk to us about design partnerships, integrations and security reviews. One form, no dark patterns, and we never re-ask for something you already told us. ## Join the waitlist Submitting opens your email client with the details below — this page is static and sends nothing to a server. Prefer plain email? Write to [waitlist@ledgerbook.ai](mailto:waitlist@ledgerbook.ai). We reply within two business days. Your address is used for access updates only — see [privacy](/privacy). ## Other paths ### Design partnerships Named partners get early builds and a working session on the invariants your product depends on — governance, isolation, audit evidence. [Email partnerships →](mailto:partnerships@ledgerbook.ai?subject=Design%20partnership%20enquiry) ### Integrations & SI enquiries Mapping legacy estates onto one ledger, batch or streaming; every load leaves a receipt. [Email integrations →](mailto:integrations@ledgerbook.ai?subject=Integration%20enquiry) ### Planning-vendor partnerships Consume actuals and scenarios from one ledger with an explicit composition boundary. [Email partners →](mailto:partners@ledgerbook.ai?subject=Planning%20vendor%20partnership) ### Security reports Coordinated disclosure: see [security.txt](/.well-known/security.txt) for the reporting channel, or review the [security page](/security). [Email security →](mailto:security@ledgerbook.ai?subject=Security%20report) ## What to expect A named collaboration: you get early builds and direct engineering contact; we get structured feedback on the invariants and interfaces you need. No fees and no commercial promises — pricing instruments are not published yet. Waitlist invitations go out ahead of the developer preview; design partners are sequenced first. You will not get a marketing drip — access updates and the changelog digest only. Yes. The security posture, deployment classes and the attestation roadmap (SOC 2 Type II targeted inside PH-2) are documented for questionnaire review; write to us and we will route it properly.