Sumarity
For asset managers and family offices

Every custodian. Every line explained.

Statements from every bank, in every layout, reconciled against your own book. Code proves the trades, coupons and fees; the Judgement Engine says what each unexplained line is; anything it can't prove goes to your team, with a record of who decided what.

Code proves the numbers. People settle the doubts.

Custody reconciliation · statement 2026-09 · v9 Example run
DateLineAmountDecided by
02.09PURCHASE 50,000 BOND-0012Cash = nominal × price, ties to the trade−49,875.00Code · tied
03.09COUPON BOND-0007The coupon on the holding, to the cent1,250.00Code · matched
04.09REDEMPTION FUND-0031Redemption of units · 0.96 · units × NAV proves it18,402.10Engine · proven
05.09MGMT FEE Q3Fee under the mandate · 0.93 · rate × assets ties−3,120.00Engine · proven
08.09TRANSFER IN 250,000.00Subscription cash or a client deposit? Never proven250,000.00To a person
09.09CORP ACTION EQ-0044Split or exchange? · 0.71 · below the cutoff0.00To a person
Settled 4 To a person 2 Settled wrong 0
Illustrative lines in the style of the custody statements we tested on.
What we'd run for you

One workflow for all your custodians

Read the statements as they come, PDF or file, reconcile them against your book, and chase what's open until it's explained. Your rulings tune the calls; nothing changes until you publish it.

Independent asset managers, family offices, fund administrators

Custody and position reconciliationTestedA redemption, a fee, or a transfer of subscription cash?77% → 97% of lines typed right, on 42 real lines first seen after tuning. 0 settled wrong.
Fee and retrocession checksIn line with the agreement?
Mandate and investment restriction checksWithin the mandate, or a breach to report?
Periodic KYC reviewHas anything material changed, and is the file complete?
Corporate action breaksTiming, or a real error?

Sumarity for other work: Accounting and tax firms Restaurants and hotels Finance teams · everything

The number that matters most
0

wrong answers settled without a person, in every test we have run.

Models are sometimes wrong, ours included. The workflow is built so that a wrong answer has to pass a measured cutoff and a check in code before it can settle. So far, none has.

TestSettled wrong
Bank reconciliation, nine held-out monthsWording tuning never saw · 108 real exceptions, all surfaced0
The same months, three different judgement modelsJudgement Engine and two frontier models in the same seat0
Against a 1,154-line program an AI wrote for the jobThree unseen months · 36 of 36 exceptions0
Custody statements from a live fund42 real lines first seen after tuning0
UK pub VAT returns, a pub held out of tuning105 judgements · 15 of 15 problems reached the preparer0
Deliberately wrong picks at 100% confidenceFed to a changed check before it went live · 36 of 36 rejected0
Total0
How it works

Operations work is mostly rules. The rest is judgement.

Sumarity gives each part to whatever does it best: code for arithmetic, the Judgement Engine for lightning fast decisions, and people for what stays uncertain.

01

Describe

The expert writes a paragraph. Sumarity asks the questions that change the design, then writes the workflow.

Expert revisions
02

Validate

Numbers only from code, every doubt to a person, every path handled. What fails is repaired before anyone sees it.

43 errors → 0 in one repair
03

Review

Every step on a canvas in plain words, editable and versioned. What runs is what was reviewed.

draft → validated → published
04

Run

Code matches and ties out. The Judgement Engine decides, and learns when it cannot. People get an inbox.

2,112 lines in 4.5 s
05

Tune

Rulings become an answer key. Better questions are proposed, tested on data they haven't seen, and lets you decide.

77% → 97% on unseen lines
Every decision your team makes in the inbox goes back into step 5. It improves itself, with permission.
What the platform enforces

In this work, mistakes are expensive. So the rules aren't optional.

These aren't settings a busy team can switch off. The validator refuses a workflow that breaks them.

Left alone, AI invents a plausible number.The AI never writes an amount or a date. Code works out every figure.
It is sure, but not right.Nothing settles below the measured cutoff, or against a code check.
It fails quietly.Every unsure or unproven call must reach a person. Every path is handled.
It changes when its vendor updates it.The process changes only when an admin publishes a new version.
It can't show its work.Every call is on record: what it saw, how sure, which version, who reviewed it.
It answers questions it wasn't asked.Each judgement is one narrow question with a fixed set of answers.
It doesn't learn from your team.Your rulings tune its questions and cutoffs, tested first on data they haven't seen.
One person can approve their own work.Separation of duties and sign-off are enforced, not written in a policy.
Industries and use cases

Wherever the work is mostly arithmetic, with judgement calls in between.

Every one of these has the same shape. Code does the matching and the sums, the Judgement Engine answers one narrow question per item, and whatever stays uncertain goes to a person.

Codematches, ties out, works out every figureJudgementone narrow question, measuredA personwhatever stays uncertain

Fund and investment operations

Administrators, depositaries, asset managers

Statements in every custodian's layout, against your own book, with breaks that have to be explained and chased.

Custody and position reconciliationA redemption, a fee, or a transfer of subscription cash?
Trade and corporate action breaksTiming, or a real error?
Fee and expense checksIn line with the agreement?
Price and valuation reviewIs this move plausible?

Risk and compliance

Compliance, financial crime, onboarding teams

High-volume alerts where most are noise, every decision needs a record, and the real ones must never be missed.

Sanctions and screening alertsThe same party, or a namesake?
Transaction monitoringWorth escalating?
Vendor and client onboardingComplete and consistent?
Periodic KYC reviewHas anything material changed?

Finance and accounting

Controllers, shared services, treasury

Matching and tying out, where most lines are easy and the rest need someone who knows the business.

Bank and cash reconciliationIs this receipt that invoice, paid days apart?
Customer cash applicationWhich invoices does this remittance pay?
Invoice and payment matchingA price change, or overbilling?
Financial reporting tie-outDoes it tie out, and is the variance explained?

Accounting and tax services

Outsourced bookkeepers, tax preparers, practices

Many clients, the same process each period, and a filing at the end that has to be right.

VAT return preparationWhat was this purchase used for, and is any VAT reclaimable?
Bookkeeping and account codingWhich account does this belong to?
Expense and policy reviewWithin policy?
Client queries and chasingHas the client's answer settled the question?
Track record

Three processes, three domains. Every figure from a run.

Each workflow was authored through the product from an expert's description, then scored against a known answer.

Tested against the alternatives

Why not just hand it to an AI? We tried that too.

Same brief, same data, same scoring. These are the three things a capable team would try instead.

Give a frontier model the whole job

Each model got the brief and both exports and returned the finished reconciliation, five times on each of two data sets.

SumarityOpus 5.5GPT-6 Sol
Exceptions (of 108)10810895
Same result, 10 runs10/1010/102/10
2,112-line account4.5 s262 s–
Record per lineYesNoNo
Past about 6,000 lines the job no longer fits in one reply.
Ask an AI to write the code

Opus wrote a careful 1,154-line program from the same brief and sample files. Both then ran on three months worded in ways neither had seen.

SumarityAI-written code
Exceptions (of 36)3636
Settled wrongly00
Judgement items to people314
False alarms314
The program's rules were written from the sample's wording. Nothing in it learns from a review.
Put a frontier model in the judgement seat

The same workflow and checks, with only the judgement model swapped. 180 decisions with known answers.

EngineOpus 5.5GPT-6 Sol
Answered right100%99%100%
Median per call0.21 s1.76 s1.47 s
Per 1,000 callsIncluded$4.67$1.36
Settled wrong000
The checks keep any model safe. What changes is the bill and the wait.

Reasoning, audit trails and human approval are now common. Checks in code, measured confidence and tested changes are not.

Checked, not just explained

Every call declares how it is checked. What code can't check, people audit by sample, and every doubt goes to a person.

Confidence measured

Cutoffs come from backtests against your team's rulings, not from what a model says about itself.

Changes tested first

Each improvement runs on data it hasn't seen, and against deliberately wrong answers, before an admin can publish it.

Start with a pilot

Bring one process. Run it alongside yours.

A few weeks in parallel on your own data, at our cost, then a line-by-line comparison: what it settled, what it sent to people, what it caught, and the time it took.

Custody and position reconciliationFee and expense checksRisk and compliance review
Contact us sumarity.ai
  1. 01
    Start from a tuned template, or describe itA paragraph from the person who runs the process today.
  2. 02
    Review the workflow with usOn the canvas, step by step, in plain words.
  3. 03
    Run it in parallelYour process stays the process of record.
  4. 04
    Your rulings tune its callsEvery inbox decision joins the answer key.
  5. 05
    Compare, line by lineThen decide, on your own evidence.
Contact us

Tell us about the process. We'll come back to you.

A few details are enough to start. We'll reply to arrange a conversation with the person who runs the process today.

  • We reply to set up a first call.
  • We look at the process with your expert, and say whether it fits.
  • If it does, we scope a pilot run alongside yours.

We use these details only to reply to you.