Around 24 marketers are checking campaigns with Flowproof nowLive estimate

Built by Euphemia. Made for CRM teams.

Flowproof

Be remembered for the campaign.
Not the mistakes.

Email and customer journey QA that turns launch risks into clear next steps. Check the build before your customers do.

Try 10 free checks Find your starting point

No card required. Just a little more confidence before you send.

Find your starting point

What are you working on?

Your next step

Your next send, checked.

Review your HTML or forwarded .eml for broken links, tracking gaps, leftover test copy and accessibility risks.

Paste HTML or upload an .eml
See the issue, the evidence and the fix
Save, share or export your report

Start on the Free plan

£0 / 10 checks each month

Check an email

For the platforms your team already works with

BrazeKlaviyoHubSpotBrevoCustomer.ioActiveCampaignand more

See it before you sign up

Less guesswork. A clearer next step.

A report built around what needs fixing, why it matters and what to do next.

Illustrative sample. Not client data.

Summer campaign / QA report

Email review

1 critical · 1 warning · 1 suggestion

Critical

Non-production URL

Flagged element

href="https://staging.yourbrand.com/offer"

Recommended fix

The campaign CTA points at a staging domain. Replace it with the live destination before sending.

Saved history · Share links · PDF reports · CSV export for Jira / Asana

Check your own build

From build to sign-off

Check. Understand. Launch.

Bring the work you already have. Flowproof turns it into a focused QA report your team can act on and share.

Bring your build

Paste raw email HTML, upload a forwarded .eml, or paste a Braze Canvas, Klaviyo Flow, HubSpot Workflow, Brevo, Customer.io or ActiveCampaign automation export.

HTML · .eml · text · JSON

Find what matters

Automated rules and AI review check campaign details, brand rules and journey logic in one place.

Rules + AI review

Fix. Retest. Send.

Prioritise critical issues, warnings and suggestions. Compare retests and share a clear report with your team.

Report · PDF · share link

What Flowproof checks

Deterministic rules catch the mechanical mistakes. The AI reviewer handles the judgement calls and journey logic.

Broken and placeholder links

Staging domains, localhost, empty href="#" and malformed URLs flagged with the exact element.

Personalisation and merge tags

Malformed tokens, unbalanced braces and attributes with no fallback value for empty profiles.

UTM consistency

Missing utm_ parameters and links tagged with different parameter sets across the same send.

Leftover test copy

Lorem ipsum, TODOs, internal notes and do-not-send warnings still sitting in the build.

Subject line and preheader

Length warnings for mobile inbox truncation, plus missing preheaders that pull body copy.

Accessibility basics

Missing alt text, tiny font sizes and contrast issues that make emails unreadable.

Journey logic

Dead-end branches, overlapping entry criteria, missing exit conditions and unthrottled repeat sends.

Client-ready reports

Every run saved to your workspace, exportable as a branded PDF or a read-only share link.

More QA, less overhead

A sharper way to QA CRM campaigns

Litmus and Email on Acid are strong inbox-preview platforms. Flowproof is the focused, lower-cost choice when you need to find campaign mistakes and journey risks before launch.

Purpose-built for CRM QA

Flowproof

The focused QA workspace for campaigns and customer journeys, with useful answers instead of another complicated production suite.

Best for

CRM marketers and agencies that want faster sign-off, clearer fixes, and professional reports without enterprise overhead.

Audits campaign content and journey logic together
Works with HTML, .eml, text, and CRM exports
Pinpoints each issue and recommends the next fix
Turns findings into PDF and shareable reports

Capability

Email content and link QA: Checks campaign content, links, tracking, personalisation and common launch risks.

Start at £0. Get 10 checks every month, then move to unlimited QA from £19 monthly.

Start checking for free

Prices checked September 2026. Email on Acid lists plans in US dollars. Litmus asks customers to request pricing. Features and prices can change.

Litmus pricing Email on Acid pricing

Feedback From Users

“The PDF download works nicely, and the share link opened perfectly in a private window.”

Angela

Simple pricing

Professional CRM QA without enterprise pricing

Start with a genuinely useful free plan. Upgrade for unlimited checks, cleaner reports, and agency-ready branding.

No card needed for Free

Free

£0forever

For trying the core QA workflow.

10 QA checks each month
1 user
Email and journey reviews
Watermarked reports

Start free

Recommended

Starter

£19per month

For individual CRM marketers shipping regularly.

Unlimited QA checks
Everything in Free
1 connected workspace
No report watermark

Choose Starter

Agency

£59per month

For agencies delivering client-ready, white-label QA reports.

Unlimited QA checks
Everything in Starter
White-label reports
Priority support

Choose Agency

Enterprise

Custom

For organisations that need procurement, SSO or an SLA.

Everything in Agency
SSO planning
Custom SLA
Tailored onboarding

Starter and Agency use secure recurring card checkout. PayPal and bank transfer remain manual fallbacks.

Ask about manual payment →

Ship your next send with confidence

Start free, run your first check in under a minute.

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