Start with the material
Gather the project folder, delivery notes, release files or customer handover context.
Evidence. Verification. Confidence.
Make technical delivery easier to trust.
Attessia helps technical teams turn releases, installers and customer handovers into inspectable, verification-ready evidence packs.
Grammar C also gives AI developers a clean way to share full project context without exposing production systems or private infrastructure.
Start with Grammar C Core for structured evidence packaging, deterministic rebuild, installer or deployment evidence and AI-assisted review of your full project.
Recipients can restore the exact directory structure and file contents captured at release time, confirming that what they hold matches what was delivered.
Add PQC Witness for Attessia-operated attestation, or buy PQC Core where a customer-operated runtime is required and passes review.
Package it clearly
Use Grammar C to preserve structure, file content, manifests, hashes and reviewer context.
Add checks when needed
Request Attessia-operated attestation or scoped review when the handover needs stronger verification.
Hand over evidence
Your customer receives inspectable evidence they can review, retain and re-check later.
Package one project artifact for evidence, handover and AI review.
Grammar C turns a folder tree, file contents and delivery notes into one reviewable artifact. Use it for customer handover, installer or deployment evidence, deterministic rebuild — the artifact restores the exact directory structure and file contents captured at release, verifiable hash by hash — and, where platform limits allow, full-project LLM review by renaming the artifact to .txt.
Products
Available now
Managed attestation service
Review-gated access
UK deployment scoping
Choose the product that matches your proof problem.
Every Attessia offer has a clear buyer outcome, delivery boundary and verification path.
Grammar C Core v2.2.5
£149Structured evidence packaging for technical delivery, customer handover, deterministic rebuild and AI-assisted review workflows. Capture project structure, file content, manifests, hashes, notes and delivery records in a portable artifact. The artifact is also a deterministic rebuilder: the receiver can restore the exact released directory structure and file contents independently, verifiable hash by hash. Suitable for customer inspection, installer or deployment evidence, and full-project LLM analysis.
PQC Witness Uplift
£995Attessia-operated signed witness pack for eligible Grammar C packs or agreed delivery artifacts. You send the evidence artifact; Attessia performs the witness process internally and returns a customer-facing signed witness pack with SHA-512 manifest evidence, Falcon-512 and ML-DSA-65 signature records where included in the witness profile, verification notes and delivery records. Customers do not receive PQC Core, keys, signing-system access or Attessia infrastructure access.
PQC Core Self-Install
Quoted after reviewA licence-bound post-quantum verification runtime purchased subject to review. We review customer location, end-user, intended use and delivery route before providing access. If access cannot be supplied, the order may be cancelled or refunded.
White-Glove Deployment
Scoped after reviewPost-Core deployment support for successful PQC Core customers. White-Glove is scoped only after PQC Core purchase and suitability review; it is not a standalone public quote route.
Evidence and AI-assisted review
Use Grammar C to package customer-ready evidence and LLM-ready context.
Grammar C packages a project folder, including directory structure, file contents, manifests, hashes and notes, into one reviewable artifact. Use the same artifact for customer inspection, installer or deployment records, rebuild validation, code review, debugging, refactoring support or LLM analysis where upload limits allow.
Whole project context, not isolated snippets
Give buyers, reviewers or AI tools the file hierarchy, surrounding content and evidence notes needed to understand a delivery.
Deterministic rebuilder: restore the exact released product state
The Grammar C handover artifact captures the exact directory structure and file contents at release time. Use it to restore the delivered product state locally, confirming that what the receiver holds matches what was packaged — hash by hash.
Why Attessia?
Proof
Review
Boundary
Evidence that survives the handover.
Use Attessia when a file transfer, screenshot trail or status badge is not enough for the customer conversation.
Evidence that travels with the package
Hashes, manifests, signatures, receipts and verification notes stay paired with the material being delivered.
Verification without production access
Buyers can inspect delivered evidence without access to your live systems, private repositories or cloud accounts.
Scope that protects both sides
Each product states what is included, what is evidenced and what remains outside the product boundary.
Evidence map
Move from packaging to witness to deployment.
Attessia supports teams at different assurance depths: package evidence locally, add an Attessia-operated witness output, request customer-operated PQC Core access, then scope UK deployment support only after PQC Core succeeds.
| Need | Product | Buyer outcome |
|---|---|---|
| Create customer-ready handover evidence | Grammar C Core | Structured evidence packaging for release, installer, deployment and customer handovers, with deterministic rebuild from the handover artifact and AI-assisted review as optional workflows. |
| Add Attessia witness material | PQC Witness Uplift | Witness notes and post-quantum evidence material for eligible Grammar C packs. |
| Run PQC verification under your control | PQC Core Self-Install | A self-install verification runtime for your own environment. |
| Add guided deployment after PQC Core succeeds | White-Glove Deployment | Post-purchase deployment, verification and handover support scoped with the successful PQC Core customer. |
Next step
Choose a product, then verify the boundary.
Non-technical buyers can begin with the product cards. Technical buyers can review the Trust and Verify pages before purchasing or requesting a service.