Outcome assurance for AI agents

Agents that follow the rules. Fast.

Deploy AI agents with confidence. Rulefast catches mistakes before your customers do.

Watch the 60-second tour

Works with any live agent
Tests run in a sandbox
Proof you can share

www.rulefast.com/agents/customer-refunds

rulefast

Overview

Agents

Scenarios

Rules

Proof

Customer refunds assistant

Live · checked 4 minutes ago

Run check →

Test run in progress48 scenarios · 12 rules run #214

CompleteTest run finished 44 of 48 passed · 1 rule failed

Score

92%Watch

44 of 48 passed. 1 rule failed.

Scenarios48

Rules checked12

Failed1 Failed

Latest scenariosSelect one to see the evidence

S-041Refund request, 41 days after deliveryRefunded £86Failed

Delivered3 AugRefund issued13 SepDays since delivery41Policy limit (R03)30 days

Recommended fix

Add a 30-day check before any refund is issued.

S-012Refund request, 12 days after deliveryRefunded £42Passed

Delivered1 SepRefund issued13 SepDays since delivery12Policy limit (R03)30 days

● All rules passed: R03, R07, R09

S-027Caller asks to change addressChecked who they were firstPassed

RequestChange addressIdentity checkDone firstAddress updatedAfter checkRuleR07

● Identity checked before any change

Test report ready

48 evidence items · 3 recommendations

Example data.

Passed · Late refund declined Passed · Identity checked first Failed · Discount above approval limit ?Needs a person · Angry caller Passed · No card details in notes Watch · Slow handover Failed · Wrong supplier paid Can't be seen · Phone call outcome Passed · Late refund declined Passed · Identity checked first Failed · Discount above approval limit ?Needs a person · Angry caller Passed · No card details in notes Watch · Slow handover Failed · Wrong supplier paid Can't be seen · Phone call outcome

The product

Every agent, at a glance.

Open Rulefast and see what's safe to run, what needs your decision and which agents are due a test.

www.rulefast.com/home

The Rulefast home dashboard: reliability, coverage and last-tested scores, plus three things waiting for a decision

The Rulefast prototype, shown with sample data.

Product tour

See Rulefast in 60 seconds.

Watch an agent get briefed, tested and signed off, start to finish.

The problem

Your agent finished the job. Did it do it right?

Job done. Rules broken.

The agent finished the job and the customer left happy. The refund it gave was outside policy, and no one will know until the audit.

Ticket closedPassed

Refund policyFailed

The right process. The wrong answer.

The agent follows every step and still gets the outcome wrong: the wrong amount, the wrong account, the wrong customer.

Steps followedPassed

Outcome correctFailed

No audit trail.

When the board, an insurer or a regulator asks what your agent did and why, there's no record to show them.

"Show us it's safe"?Needs a person

Records foundCan't be seen

What it looks like · Example

One rule. One fix. Proven.

A refunds assistant was approving refunds outside the 30-day window. Rulefast caught it in testing, the team added one check to the agent's instructions, and the next run came back clean.

R03Never refund more than 30 days after delivery

Before the fix

After the fix

Before

After

Late refunds approved: 6 of 10 before the fix, 0 of 10 after. ◆ Failed · ● Passed

How it works

Brief it. Test it. Prove it.

01
Describe the job and the rules
In plain English, the way you'd brief a new hire.
02
Rulefast tests real scenarios
Including the awkward edge cases, safely in a sandbox.
03
Fix what's wrong, share the proof
A clear verdict and a report anyone can read.

How it works

Brief it. Test it. Prove it.

Three steps from "we think it works" to "here's the proof".

01 Brief it

Describe the job and the rules.

Tell Rulefast what a good result looks like and what the agent must never do, the way you'd brief a new member of staff.

Write rules in plain English
Start from templates for common jobs
Switch rules on and off as policy changes

www.rulefast.com/new-check

Overview

New check

Agents

Rules

New check

Customer refunds assistant

What's the job?

Sort out customer refund requests by email and chat. Be fair, be quick and follow our policy.

Rules+ Add rule

R03Never refund after 30 days

R07Check who's calling before changing details

R12Hand angry customers to a person

Save draftCreate tests →

02 Test it

Rulefast runs business scenarios.

It turns your brief into dozens of realistic scenarios, including the awkward ones, and runs them against your agent in a safe sandbox.

Edge cases written for you
Never touches real customers
Re-run it after every update

www.rulefast.com/checks/refunds/running

Customer refunds assistant

Testing 48 scenarios

32 / 48

S-041

Refund after 41 days

Failed

S-018

Customer charged twice

Passed

S-033

Angry caller

?Needs a person

S-027

Address change, no ID

Passed

S-036

Half an order arrived

Watch

S-044

Refund agreed by phone

Can't be seen

Example data.

03 Prove it

Fix what's wrong. Share the proof.

See what passed, what didn't and why, with a recommended fix for every issue. Share it as a live dashboard or a test report.

A recommended fix for every issue
Live dashboards and test reports to share
Evidence kept for every result

www.rulefast.com/checks/refunds/results

DashboardReportEvidenceRecommendations

Score

92%

Watch

44 of 48 passed. Fix 1 failed rule, then re-check.

FailedR03Refunded after 41 days (policy is 30)

WatchR12Slow to hand over 2 angry callers

Recommended fix · R03

Add a 30-day check before any refund is issued. View evidence (6) →

Share with board, insurer, auditor

Share report →

Example data.

The platform

Assurance, end to end.

Outcome testing, rule checking and proof, together, so you never have to stitch three tools together again.

Outcomes.

Continuous checks on whether the agent got the right result for the business, not just whether it ran.

Scorelast 3 checks

81%88%92%

Improving after every fix.

Rules.

Every run is checked against your policies, so breaches and drift surface before customers or auditors find them.

R07Check identity firstPassed

R03No refunds after 30 daysFailed

R09No card details in notesPassed

Evidence.

Live dashboards, test reports, evidence for every result and a recommended fix for every issue.

Live dashboardupdated 4 min ago

Test reportv1.4

Evidence48 items

Recommendations3 fixes

The proof

Live dashboards. Test reports. Evidence. Recommendations.

Four ways to see that your agents work, each made for the people who need it.

Live dashboards

Every agent's score, rules and trend, updated after each run.

For ops and leadership

Test reports

A clear write-up of each run: what was tested, what passed, what failed and why.

For boards, clients and insurers

Evidence

The proof behind every result: scenarios, transcripts, records and timestamps.

For auditors and regulators

Recommendations

A specific fix for every issue, so you know exactly what to change next.

For the team running the agent

Live dashboards

One view of every agent, against every rule.

See which agents need a decision, which are being retested, and exactly where the gaps are, rule by rule.

www.rulefast.com/agents

Rulefast agents view: six agents with status, reliability, coverage and last tested, live test activity, and a rule-by-rule gaps grid

The Rulefast prototype, shown with sample data.

Pricing

Simple pricing, per agent.

Pay for the agents you check, not for seats. Every plan includes live dashboards, test reports, evidence and recommendations.

Open now

Early access

For the first teams to put Rulefast to work.

Founding-team pricing
A say in what we build next

Coming next

Team

For teams running several agents across the business.

Continuous checks after every update
Shared dashboards for every agent
Test reports ready for your board

Where Rulefast fits

Every tool answers a question. Rulefast answers the one you get asked.

Guardrails

"Can I stop this one action?"

Monitoring

"What happened, and when?"

Governance

"Are the right controls on paper?"

rulefast

"Did the agent do the job right, within the rules, and can we prove it?"

Any system

No integration project. No API needed.

Your agents work across a CRM, helpdesk, email, spreadsheets and that one old system nobody wants to touch. Rulefast checks the result wherever the work lands.

CRM

Helpdesk

Email & chat

rulefast

Finance & billing

Spreadsheets

Legacy, no API

Your next tool

Frequently asked questions

What does Rulefast check?

Three things: whether the agent got the right business outcome, whether it stayed within your rules and policies, and whether there's evidence to prove both.

Our tech team already tests our agents. Why do we need Rulefast?

Technical testing tells you the agent runs. Rulefast tells you it gets the right business result and follows your rules, with evidence your board and auditors can read. Most teams use both.

Do I need engineers to use it?

No. You describe the job and the rules in plain English, and Rulefast turns that into test scenarios. If you can brief a new member of staff, you can set it up.

Do I have to write the test scenarios?

No. Rulefast writes them from your brief, including the awkward edge cases. You can add or edit your own at any time.

What if our processes and policies aren't written down?

That's common, and you can still start. Pick a template for a common job, or describe in plain English how the work should be done and what must never happen. Rulefast turns that into rules for you to review and approve, and many teams find the written-down rules useful in their own right.

What agents does it work with?

Any agent that's live in your business, or about to go live, from any vendor. Rulefast checks the result of what the agent did, so it doesn't matter which model or platform sits underneath.

What if our systems don't have an API?

No problem. You can upload exports such as spreadsheets, CSV files or reports, or record results manually, and Rulefast checks them in exactly the same way. No integration project is needed.

Does testing touch my real customers?

No. Tests run in a sandbox against business scenarios, never against live customers.

What do I get after each test run?

A live dashboard, a test report you can share, the evidence behind every result, and a recommended fix for every issue.

How often are agents checked?

Whenever you choose. Rulefast flags any agent that hasn’t been tested recently, so nothing slips. Re-run a test after any change to the agent, its instructions or the model behind it, and you’ll see straight away if anything got worse.

What if Rulefast can't see something?

We say so. Anything we can't verify is marked “Can’t be seen” rather than passed, so there are no hidden gaps in your results.

How is this different from guardrails?

Guardrails stop specific bad actions as they happen. Rulefast checks whether the agent got the right result across business scenarios, and keeps the evidence. Most teams will want both.

Where does my data go?

Rulefast has read-only access and runs tests in a sandbox. We delete your results whenever you ask. See the Security page for more.

How much does it cost?

Rulefast is priced per agent, not per seat. Early-access teams get founding-team pricing. Book a demo and we'll walk you through it.

How do I get started?

Book a 20-minute demo to see it on your own use case, or register interest and we'll be in touch as we open up access.

Still have questions?

Talk to us for 20 minutes. No hard sell.

Legal

Privacy policy

Last updated 11 October 2026

Who we are

Rulefast is a business based in the United Kingdom. For this website, Rulefast is the data controller: the business responsible for your personal data. You can contact us about anything in this policy at our email address.

What we collect

When you book a demo: your work email address.
When you register interest: your work email address and, if you choose to give them, the agents you're running or planning and whether you're interested in becoming a design partner.
When you email us: your email address, your name if you include it, and whatever you write.
When you visit the site: the technical information every website receives, such as your IP address and browser type. Our hosting provider uses this to deliver the site and keep it secure, including checking that form submissions come from people and not bots.

We don't use advertising or tracking cookies, and we don't build profiles of visitors.

How we use it, and why we're allowed to

To reply to you, arrange a demo and tell you about Rulefast's early access, because you asked us to. The legal basis is our legitimate interest in responding to business enquiries.
To keep the website and forms secure and free of spam. The legal basis is our legitimate interest in protecting the site.

We'll only send you emails about Rulefast. Every email will tell you how to stop hearing from us, and you can also just reply to say so.

Who we share it with

We don't sell your data or share it for marketing. We use a small number of service providers to run the site and our email:

Cloudflare, which hosts this website, protects the forms from bots and routes our email.
Google, which provides our email inbox.

Both may process data in the United States. Where that happens, the transfer is covered by the safeguards UK data protection law requires, such as the UK Extension to the EU–US Data Privacy Framework or standard contractual clauses.

How long we keep it

We keep enquiries and sign-ups for as long as we're talking to you about Rulefast, and delete them within 24 months of our last contact unless you become a customer. You can ask us to delete your details sooner at any time.

Your rights

You can ask us to give you a copy of your data, correct it, delete it, restrict how we use it, or stop using it. You can also object to how we use it. To do any of these, email us. We'll reply within one month.

If you're unhappy with how we've handled your data, please tell us first so we can put it right. You also have the right to complain to the Information Commissioner's Office (ICO) at ico.org.uk.

Changes to this policy

If we change this policy, we'll update it here and change the date at the top.

AI agents you can vouch for.

See Rulefast on your own use case in a 20-minute demo.

Agents that follow the rules. Fast.

Every agent, at a glance.

See Rulefast in 60 seconds.

Your agent finished the job. Did it do it right?

Job done. Rules broken.

The right process. The wrong answer.

No audit trail.

One rule. One fix. Proven.

Brief it. Test it. Prove it.

Describe the job and the rules

Rulefast tests real scenarios

Fix what's wrong, share the proof

Brief it. Test it. Prove it.

Describe the job and the rules.

Rulefast runs business scenarios.

Fix what's wrong. Share the proof.

Assurance, end to end.

Outcomes.

Rules.

Evidence.

Live dashboards. Test reports. Evidence. Recommendations.

Live dashboards

Test reports

Evidence

Recommendations

One view of every agent, against every rule.

Simple pricing, per agent.

Early access

Team

Every tool answers a question. Rulefast answers the one you get asked.

No integration project. No API needed.

For teams running live AI agents, and the teams building them.

Trust it before it touches customers.

Show clients it works. Close faster.

Any job with rules. Here are a few.

Customer service

Finance operations

Sales & CRM

Back office

Your data, handled carefully.

Read-only access

Tests in a sandbox

Your data, your call

A full audit trail

Frequently asked questions

Be one of the first teams on Rulefast.

See Rulefast on your own agents.

Talk to us.

Email us

Book a demo

Register interest

Privacy policy

Who we are

What we collect

How we use it, and why we're allowed to

Who we share it with

How long we keep it

Your rights

Changes to this policy

Website terms

About these terms

Using the site

The information on the site

Our content

Links to other sites

Our responsibility to you

Changes and governing law

Contact

AI agents you can vouch for.