We reviewed the leading Email Deliverability platforms for US marketing and sales teams — comparing starting prices in USD, free plans and trials, feature depth, integrations and user ratings from G2, Capterra, GetApp, TrustRadius and Gartner Peer Insights. 8 vendors from our Email Marketing category are compared side by side, with every detail on this page — no extra clicks required.
Tool finder
Question 1 of 3
How big is your team?
Offer
Price / month
Rating
Sorting
Overall score
Average score across 5 review platforms
Fastest delivery for transactional emails
Top 3 pros
Top 3 cons
Overall score
Average score across 5 review platforms
Email Deliverability Tests
Top 3 pros
Top 3 cons
Overall score
Average score across 5 review platforms
Developer-friendly email API
Top 3 pros
Top 3 cons
Overall score
Average score across 5 review platforms
Enterprise Deliverability Platform
Top 3 pros
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Overall score
Average score across 5 review platforms
Email testing and preview tool for deliverability and rendering
Top 3 pros
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Overall score
Average score across 5 review platforms
Scalable email infrastructure by Twilio
Top 3 pros
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Overall score
Average score across 5 review platforms
Email testing and deliverability tool for developer teams
Top 3 pros
Top 3 cons
Free to start, paid plans from a few Euro
Tiered by test volume
Try for free for 14 days
Overall score
Average score across 5 review platforms
Tool for Email Deliverability and Spam Score Assessment
Top 3 pros
Top 3 cons
Email Deliverability tools consolidate work that teams otherwise split across several point solutions. This list covers 8 vendors from our Email Marketing category that genuinely serve the use case and are available to US buyers. The average overall score across the rated vendors is 4.1 out of 5, and entry pricing ranges from ab 15€ / Monat – ab 59€ / Monat.
Postmark currently leads the list at 4.6/5: Fastest delivery for transactional emails GlockApps follows closely at 4.3/5 — Email Deliverability Tests If budget is the deciding factor, Postmark offers the lowest entry point at from $15 / month.
You can evaluate most options before any purchase order: Mailgun and SendGrid offer a permanently free plan, while Postmark, GlockApps, Litmus and Mailtrap run a free trial. Everest (Validity) and mail-tester grant access through a guided demo only — come prepared with seat counts, data volumes and must-have integrations.
Headquarters matter for procurement and data processing: 6 of 8 vendors here are US-based, the rest are European. US teams selling into the EU should confirm data residency options and EU-US Data Privacy Framework participation early.
| Vendor | Starting price | Try it | Score | Headquarters |
|---|---|---|---|---|
| Postmark | from $15 / month | Free trial | 4.6 | USA |
| GlockApps | from $59 / month | Free trial | 4.3 | USA |
| Mailgun | from $15 / month | Free plan | 4.2 | USA |
| Everest (Validity) | from $20 / month | Demo / quote | 4.1 | – |
| Litmus | Price on request | Free trial | 4.0 | USA |
| SendGrid | from $20 / month | Free plan | 4.0 | USA |
| Mailtrap | Free to start, paid plans from a few Euro | Free trial | 3.9 | EU (Ukraine/Railsware) |
| mail-tester | Free basic test | Demo / quote | 3.9 | Frankreich |
Fit with your core workflow
Feature counts matter less than whether the tool runs your main Email Deliverability workflow without workarounds. Write down the three tasks your team performs daily and test exactly those.
Total cost, not list price
Entry prices such as ab 15€ / Monat – ab 59€ / Monat are typically per seat and month on annual billing. Add extra seats, contact tiers, onboarding fees and paid add-ons before comparing.
Integrations
Check whether your CRM, storefront, analytics and ad accounts connect natively or only through Zapier/Make. Native connectors reduce maintenance and prevent reporting gaps.
Security and compliance
Ask for SOC 2 status, data residency options, retention settings and consent handling. Teams with EU customers should also confirm DPA availability and Data Privacy Framework participation.
Onboarding and support
Implementation packages, response-time commitments and a maintained knowledge base decide whether a tool is still in use after three months. Clarify support tiers before signing.
Exit and data portability
Contract term, notice period and export formats belong in the evaluation. CSV or API exports on demand keep you free to switch later.
Solo operators and small teams
Mailgun covers the entry level without a big budget. Prioritize fast setup, few required fields and pricing that scales only as you grow.
Mid-market teams with established processes
Postmark and GlockApps provide the broadest functional base in this list and adapt to existing workflows. Look closely at roles and permissions plus automations that span departments.
Enterprise and regulated industries
Everest (Validity) and similar vendors work from custom quotes with SSO, audit logs and named contacts. Contract and security documentation matters more than the list price here.
Pricing, plans and features change frequently. We re-check the figures against vendors' public pricing pages; the vendor's own terms always take precedence for contract decisions.
Every list follows the same four steps – so scores stay comparable across categories.
Postmark currently leads this list with an overall score of 4.6 out of 5, averaged across all review platforms. Depending on team size and budget, the other Email Deliverability vendors above can be the better fit – use the filters to narrow it down.
Yes. These vendors offer a free plan or a free trial: Postmark, GlockApps, Mailgun, Litmus.
The lowest entry price in this comparison is Postmark at ab 15€ / Monat. Prices scale with contacts, users or feature tier.
