Preflight vs. other email QA tools
Compare the checks and workflows in Preflight, Litmus, Parcel, and Mailgun Inspect. Preflight focuses on email previews, accessibility and delivery checks, API access, and browser extension testing; these tools also offer features such as code analysis, collaboration, analytics, or monitoring.
Simple, straightforward pricing
Preflight is $35 per month, with no annual contract or confusing plan tiers. Every plan includes 650 screenshots and the tools to check your email before it goes out.
Preflight
$35/month
Includes 650 screenshots, delivery checks, accessibility insights, API access, and extension-based testing.
Parcel
$49/month+
Inbox Previews start at $49/month for 500 previews. Requires a Parcel Pro or Business plan; additional previews are billed based on usage.
View pricingMailgun Inspect
$99–$199/month
Basic is $99/month; Premium is $199/month and adds accessibility, code, link, image, and spam checks.
View pricing
Litmus
$15k+/year
Treat this as a rough budget guide rather than a fixed public starting tier. Litmus uses a demo-led enterprise pricing flow, so final scope and commitment are set through sales.
View pricingWhy teams choose Preflight instead
Preflight is designed for teams that want to move quickly, keep spend under control, and trust the screenshots they review before sign-off.
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Lower commitment from day one
You can start with a simple monthly subscription instead of planning around an enterprise-style annual evaluation.
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Real iOS device previews for Apple QA
Preflight uses real iOS devices for Apple previews, giving teams more confidence in the screenshots they review before sign-off.
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Public API access is already in the mix
Preflight includes public API access and documentation in its core product story, which makes custom workflow integration easier to evaluate and adopt.
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Earlier testing in real build workflows
The browser extension is built around local HTML files, localhost previews, and supported builders, so screenshot feedback can happen before a full audit.
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Independent small-business support
You are dealing with a focused, independently run product and can talk to the people building it when your workflow needs something specific.
Compare checks and workflow features
A side-by-side look at selected email checks and workflow features each product documents.
| Feature | Preflight | Parcel | Mailgun Inspect | Litmus |
|---|---|---|---|---|
| Accessibility | ||||
| Accessibility validation | Supported Advanced contrast, alt text, and language checks | Supported Accessibility validation and visual impairment simulator | Supported 45+ accessibility checks, including contrast and alt text | Supported 40+ automated areas, visual impairment filters, and NVDA preview |
| Checks across desktop, tablet, and mobile viewports | Supported Documented check | Not listed in cited public documentation Not listed in cited public documentation | Not listed in cited public documentation Not listed in cited public documentation | Not listed in cited public documentation Not listed in cited public documentation |
| Links and tracking | ||||
| Link validation | Supported Checks URL schemes and warns about vague link text | Supported Documented check | Supported Checks broken links, redirects, and SSL status | Supported Checks destinations and uses Google Safe Browsing |
| Tracking link validation | Not listed in cited public documentation Not listed in cited public documentation | Not listed in cited public documentation Not listed in cited public documentation | Not listed in cited public documentation Not listed in cited public documentation | Supported Checks tracking and UTM parameters |
| Images | ||||
| Image validation | Supported File size, rendered dimensions, and secure URLs | Supported Documented check | Supported Checks broken URLs, alt text, size, and dimensions | Supported Image size, broken images, and image blocking |
| Image loading speed | Not listed in cited public documentation Not listed in cited public documentation | Supported Documented check | Supported Reports total email weight and image load time | Supported Reports image load times |
| Delivery and spam | ||||
| SPF, DKIM, and DMARC | Supported Documented check | Not listed in cited public documentation Not listed in cited public documentation | Not listed in cited public documentation Not listed in cited public documentation | Supported Authentication checks |
| Sending IP reputation and blocklists | Supported Checks sending IP abuse signals | Not listed in cited public documentation Not listed in cited public documentation | Not listed in cited public documentation Not listed in cited public documentation | Supported Checks domains and IPs against blocklists |
| Spam checks | Supported Documented check | Supported Documented check | Supported Shows filtering by mailbox providers and B2B spam filters | Supported 8 essential checks; 20+ filters/providers on Plus and Enterprise |
| Message delivery time | Supported Documented check | Not listed in cited public documentation Not listed in cited public documentation | Not listed in cited public documentation Not listed in cited public documentation | Not listed in cited public documentation Not listed in cited public documentation |
| Code checks | ||||
| Detect unused CSS | Not listed in cited public documentation Not listed in cited public documentation | Supported Documented check | Not listed in cited public documentation Not listed in cited public documentation | Not listed in cited public documentation Not listed in cited public documentation |
| HTML/CSS compatibility analysis | Not listed in cited public documentation Not listed in cited public documentation | Supported Documented check | Supported Reports support across email clients and affected code | Supported Documented check |
| Previews and team workflow | ||||
| Email client previews | Supported Includes previews captured on real iOS devices | Supported 80+ inbox previews | Supported 100+ client and device previews, including dark mode | Supported 100+ email client previews |
| Team proofing and approvals | Partially supported Shareable audit insights | Supported Approvals and feedback | Not listed in cited public documentation Not listed in cited public documentation | Supported Litmus Proof |
| Export | ||||
| Copy HTML | Supported Documented check | Supported Documented check | Supported Documented check | Supported Documented check |
| Download ZIP | Not listed in cited public documentation Not listed in cited public documentation | Supported Documented check | Not listed in cited public documentation Not listed in cited public documentation | Supported Documented check |
| Export as PDF | Not listed in cited public documentation Not listed in cited public documentation | Supported Documented check | Supported Can export test reports as PDF | Not listed in cited public documentation Not listed in cited public documentation |
Crosses mark features outside Preflight’s current offering or not listed in the linked product documentation. This is a selected comparison, not an exhaustive inventory; availability can vary by plan. Mailgun Inspect claims are based on Mailgun’s public product documentation. Sources: Litmus Previews & QA, Litmus accessibility checks, Litmus spam testing, and Parcel’s comparison with Litmus, Mailgun Inspect link validation, image validation, accessibility, code analysis, and spam checks and previews.
Pricing and information last checked October 2026.
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