MailMonitor vs Validity Engage (2026): which should you pick?

Pick MailMonitor if

• Fits if you send over 10,000 emails a year to an opted-in list
• Works for senders who want a named person to fix deliverability problems

Look elsewhere if

• Skip it if you are a small sender, as the vendor says you are not the target
• Not for you if you rely on cold outbound without a warm-up or opt-in plan
• Pricey if you add it up, at $12,000 a year before the first upgrade
• Watch out: B2B placement tests and 24/7 monitoring are on the $2,000 tier
• Watch out: there is no free plan or trial to try it first

Pick Validity Engage if

• Fits if you send large volumes and need to see inbox placement
• Works for brands with a team watching sender reputation

Look elsewhere if

• Not for you if you want to buy online, as pricing is built to fit through sales
• Skip it if you want a free plan or trial, as none was found
• Watch out: the directory name is Validity Everest, but the vendor's pages call it Validity Engage
• Pricey if you are a small sender, as it is aimed at enterprise sending programs and priced through sales

MailMonitor

• Plans start at $1,000 a month, billed annually, and the page says to check eligibility first.
• The vendor says it is not a fit for senders relying only on cold outbound without a warm-up or opt-in plan.
• It says a fit means sending over 10,000 emails a year, so small senders are not the target.
• The Foundation plan covers B2C seed inboxes only; B2B placement tests need Strategic Partnership.

Validity Engage

• Pricing is built to fit through sales; no plan prices were found on the pages read.
• The directory name is Validity Everest, but the vendor's pages now call the platform Validity Engage.
• Aimed at enterprise programs; a demo is the listed way to get started.
• No self-serve sign-up or free plan was found on the pages read.

MailMonitor

Inbox placement tracking

The analytics product tracks email across more than 400 real inboxes and monitors deliverability and reputation in near real time.

Authentication audit

Every plan includes an email authentication audit inside the software subscription; higher plans add a deeper deliverability audit.

Blocklist monitoring

Blocklist monitoring is in all three plans; blocklist removal and ISP reputation remediation start on the Strategic Partnership plan.

Hands-on remediation services

Staff walk the customer's team through fixes, or on the top plan do the technical deliverability fixes themselves.

Scorecard reports

Reports arrive monthly on Foundation and biweekly on Strategic Partnership, and the top plan adds a custom reporting dashboard.

Validity Engage

Inbox placement testing

Shows where a campaign lands across major mailbox providers, using the Validity Intelligence Network, with results split by IP and domain.

Sender reputation monitoring

Tracks Sender Score across IPs and domains so a drop can be seen before it turns into a placement problem.

Authentication monitoring

Checks SPF, DKIM and DMARC configuration and alignment across sending domains and flags when something breaks.

Blocklist monitoring

Alerts when an IP or domain is listed on a blocklist and gives guidance on the trigger and on getting removed.

Pre-send deliverability check

Runs before a campaign goes out and surfaces spam trap, reputation and authentication risks.

Provider-specific signals

Breaks placement and throttling signals out by mailbox provider such as Gmail, Yahoo and Office 365.

MailMonitor

• Deliverability Foundation$1,000

  per month and up, billed annually

  Analytics dashboard, onboarding, a customer success manager, monthly scorecard, authentication audit and blocklist monitoring (B2C seeds only).

• Strategic Partnership$2,000

  per month and up, billed annually

  Adds an in-depth audit, implementation guidance, 24/7 reputation monitoring, B2B placement tests and 320 design renders.

• Custom Enterprise Solution$3,000

  per month and up, billed annually

  Adds a dedicated account team that does technical fixes, custom API integrations, custom reporting and postmaster remediation.

Validity Engage

Pricing could not be confirmed. See validity.com.