Pricing
The site is designed to answer questions up-front, reduce procurement friction, and enable self-serve trial → purchase → key issuance.
Starter
Single developer / small projects
Evaluation
£49 / dev / month
- 1 third-party service twin
- Deterministic replay
- Local-only runtime
- Docs + CLI
Team
Engineering teams & CI pipelines
Most popular
£249 / month
- Shared twin registry (CI-ready)
- Behavior diffs
- Artifact export
- Priority support
Enterprise
Governed environments & regulated orgs
Procurement-ready
Custom / year
- Air-gapped / on-prem
- Ed25519 signing + key rotation
- Policy-enforced validation gates
- Audit export pack
- Security review support
FAQ (pricing)
After expiry, you can request an evaluation key or purchase a plan to continue. Keys can be issued automatically via payment webhook.
Yes. The PDF pack includes security model, determinism guarantees, and governance controls to reduce procurement back-and-forth.