The studio
Engineers who build it with you.
Sibylline is the studio behind Sumvin. The same engineers who built the primitives embed with your team and take your agentic finance use case from first commit to first real users.
The model
Forward-deployed, on our own stack
Most firms that will sell you an AI programme are starting from your requirements and a blank repository. We are starting from a payments stack that is already in production, and the engineers who put it there.
Four layers of the stack — Sigil, Errand, Envoy and Atomic Money — are built and running in production. A programme that starts from nothing spends its first two to three quarters reaching that point. Yours starts at the fifth stop, your own use case.
- 01Sigilidentity
- 02Errandmandates
- 03Envoyagent runtime
- 04Atomic Moneysettlement
- 05Your use casewhere we start
01–04 · Most programmes spend two to three quarters getting this far
01 · A conventional programme starts here
05 · You start here
Four layers already stand. Week one starts at the fifth — the part only you can specify.
01
Engineers in your team, not a statement of work
Forward-deployed means what it says. Our engineers sit in your standups, commit to your repositories and are accountable for the thing working — not for a document describing how it might.
02
We run this stack ourselves
Sumvin is our own venture, built on Atlas and shipped with partners like Visa, Meld and Sumsub. When something in the substrate is wrong for your use case, we fix it at the source rather than working around it.
Who deploys
The people who built the stack are the people you get
Sibylline sells judgement, and judgement has names attached. Product executives and engineers out of finance, technology and cybersecurity, who have been running AI agents at scale since 2021.
How we work
Four stages, and we are still there after
No discovery theatre. The hard part of an agentic system is not the demo, it is everything the demo elides — so the riskiest path through the whole stack gets proven before anything gets polished.
- Sibylline engineers
- your team
the lanes cross at Productise
The work is fully held in every phase. What moves across the band is whose hands are on it.
What we build
Two shapes of engagement
Both run on the same substrate. The difference is who the agent is acting for — your operators, or your customers.
Internal agentic finance
Tools your own operators use — treasury, procurement, reconciliation, vendor spend — with scoped authority and an audit trail.
Productised for your customers
A consumer or business product with identity, mandates and money built in, shipped under your brand on our primitives.
What happens next
Have an agentic finance use case?
Bring us the problem. We will tell you what it takes on our stack — and then build it with you.