Calcs solved with Diorama.
The pension calc engine the industry thought couldn’t exist.
Drop in your deed, your notes, your workbooks, in any mix, in any order. Diorama returns a full auditable calculation engine and scheme guide, in days and weeks, not months and years.
We have built pension scheme engines from governing documents alone, with no access to the incumbent platform required. We typically return a richer, clearer and more accurate scheme document than we received.
System liveThe calculations nobody else will touch.
No scheme too complex. No rule too obscure. The hardest calculations in the industry — quietly handled, proven exact, the world over.
Built differently. Delivered differently.
Three things no existing platform gives you.
Audit trail by design
Every figure links back to the deed rule and statute that authorises it. The same artefact trustees use for sign-off is what engineers use for development.
No LLM in the money path
The runtime is deterministic Python. Same inputs, same outputs, every time. AI accelerates the build. It never touches a live calculation.
Your code, your conventions
Code modules, Excel proformas, regression harnesses, all in your existing conventions. Your team owns it from day one. No platform migration, no lock-in.
Every input your scheme demands.
Every output your members need.
The method has been proven.
The rollouts are underway.
GMP Rectification
Pre-97 and post-97 GMP calculations, equalisation methodologies, and conversion exercises — fully encoded from scheme rules and HMRC guidance, with every figure traceable to the authority that permits it.
Pension Risk Transfer
PRT valuation engines built to insurance-grade precision. Consistent benefit calculations across the full membership, ready for insurer submission without manual recalculation.
Individual Scheme Projects
ISP benefit statements, early retirement exercises, deferred benefit calculations, and bespoke scheme-specific computations — each one produced from the scheme's own governing documents.
Platform Migrations
Full scheme rebuilds ahead of platform change or consolidation. The new engine is validated against the old platform's outputs before a single member record moves.
Scheme Audits
Independent recalculation of scheme benefits to surface discrepancies between what the rules say and what the platform has been paying. Every variance documented, every source cited.
Scheme Documentation
Plain-language scheme guides produced alongside the calculation engine — written for trustees, advisors, and administrators. Clearer and more complete than the documents we started with.
Five structural answers. Not policy promises.
Every interpretive call and sign-off stays with the actuary. The engine accelerates; it does not decide.
Deterministic code throughout. The LLM builds the calculator. It never enters a live calculation.
Every rebuild is fully regression tested and documented in easy-to-read reports, delivered as documents or self-contained websites.
One model executes. A second, from a different vendor, audits with no shared context. A senior DB analyst orchestrates both. Structurally analogous to peer review, with human expertise at the centre.
Personal data never reaches a model. A six-phase pipeline strips and substitutes locally before any LLM sees the artefact.
Based in the UK. Decades of DB pensions expertise,
now supercharged by AI.
Pensionable exists to solve the global pensions industry's hardest problems — the ones everyone else said couldn't be done.
Pick any figure on the audit trail.
Follow it back.
Through the deed rule. The Act. The Statutory Instrument. The line of code that produced it. Bring us the edge cases that have defeated three vendors. We would like you to try.