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SendLint

Email QA you can sign off on·sendlint.com

SendLint is an automated QA platform that verifies marketing emails against their approved source of truth before they're sent: copy deck alignment, creative comparison, link destination checks, WCAG 2.1 AA accessibility, real desktop Outlook rendering, spam/deliverability scoring, and brand voice analysis in one pass. When a campaign round passes a client's compliance policy, it mints a certificate that binds the approved email to its exact bytes via SHA-256, verifiable by anyone on a public page. A pre-send API gate can block a send if its bytes changed after approval.

What it's for

QA marketing emails against an approved copy deck and creative before sendingVerify links resolve to correct destinations through tracking wrappersRun WCAG 2.1 AA accessibility audits including color-blind contrast simulationTest how an email renders in real desktop Outlook (Word engine)Score spam and deliverability risk before sendingCheck brand voice consistency against reference emailsGenerate verifiable approval certificates for compliance sign-offBatch-check English/French email variants in one runTrack round-over-round rendering and content diffs after fixes

Features 20

Batch mode for checking EN/FR variants in one run
Brand Voice AI scoring tone, vocabulary, structure, and formality
Chromium rendering across viewports with round-over-round pixel diffs
Copy vs deck alignment in English and French, line by line
Creative comparison against approved PDF/XD, block by block
Dynamic placeholder resolution for personalization testing
Import brand rules from a design guide PDF or a sample approved email
Link validation with tracking-wrapper destination verification
Login-wall link verification via redirect target matching
PDF report export, including signature-grade compliance PDF
Per-client brand rules, numbered issue library, and product codes
Pre-send API gate that can block a send if approved bytes changed
Public client portals with token-revocable, read-only access
Real desktop Outlook (Word engine) rendering on SendLint's own render fleet
Round-over-round diff & dev-brief sharing
SendLint Approved certificates with public byte-for-byte SHA-256 verification
Slack notifications and Add-to-Slack integration
Spam and deliverability scoring with custom per-brand thresholds
Two-party approval workflow for compliance-strict clients
WCAG 2.1 AA accessibility audit with color-blind contrast simulation

At a glance

API

TypeWeb app

DeploymentCloud

PlatformsWeb

LanguagesEnglish, French

Formarketing email teams, agencies, QA leads, agency admins, brand stakeholders

CompanySendLint

Integrations

SlackMicrosoft Teams

Complianceself-reported

WCAG 2.1 AA

Pricing

Pro is $988/mo per Member seat month-to-month, or an effective $799/mo ($9,588 billed yearly) when billed annually, a 19% saving. Reviewer and Client viewer seats are free and unlimited. Enterprise pricing is custom/quote-based via Contact Sales.

Pro$988/user/mo

Monthly price is $988/mo per Member seat. Billed annually the effective price is $799/mo ($9,588/yr), saving $2,268/year versus monthly billing. Reviewer and Client viewer seats are free for designers, devs, account managers, and stakeholders.

One paid Member seat required; unlimited free Reviewer and Client viewer seats included

EnterpriseQuote

Quote-based; contact sales.

Custom, tailored to the organization

Save 19% ($2,268/year) by billing annually: Pro drops from $988/mo to an effective $799/mo ($9,588/yr).