Top 11 marketing · email that work with Marketo

Validity is the highest-ranked provider in the Top 11 GlockApps vs Validity vs Mail-tester: 11 Best Email Deliverability Tools 2026 that integrates with Marketo.

Why this answer

Filtered to entries that publicly document a Marketo integration. We do not include "API available" as proof of integration — there has to be a named connector or first-class workflow.

Showing all 2 matches. Top 11 publishes whatever the data supports — we don’t pad lists. See the full ranked GlockApps vs Validity vs Mail-tester: 11 Best Email Deliverability Tools 2026.

  1. #1Validity(rank #2 in GlockApps vs Validity vs Mail-tester: 11 Best Email Deliverability Tools 2026)

    9/9.4

    The enterprise standard for reputation data, sender certification, and large-scale list verification.

    Full Validity review · Compare: Validity vs Kickbox · Alternatives

  2. #2Kickbox(rank #4 in GlockApps vs Validity vs Mail-tester: 11 Best Email Deliverability Tools 2026)

    8.5/9.4

    A strong choice for combining elite list verification with deliverability monitoring tools.

    Full Kickbox review · Alternatives

Methodology: /methodology · No paid placement ever · Verified .