Alternatives to Folderly

Folderly ranks #5 on the Top 11 The 11 Best Email Deliverability Tools. Below: the higher-ranked alternatives we’d steer you to instead, by use case.

Verified June 15, 2026. No paid placement — see methodology.

1. #1GlockApps

   9.2 / 9.4

   Top-tier inbox placement testing with a broad, international seed list and actionable reports.

   Best for: Detailed inbox placement testing · Pricing: $$ ($79 to $399/mo) · glockapps.com/

2. #2Validity

   9 / 9.4

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

   Best for: Enterprise reputation management · Pricing: $$$$ (Custom pricing, est. >$1500/mo) · www.validity.com/

3. #3Mail-tester

   8.8 / 9.4

   The fastest, simplest tool for a single pre-send spam check and technical audit.

   Best for: Quick, on-demand spam checks · Pricing: $ (Pay-as-you-go or $50/mo) · www.mail-tester.com/

4. #4Kickbox

   8.5 / 9.4

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

   Best for: Verification and deliverability suite · Pricing: $$ ($5 to $1000+ pay-as-you-go) · kickbox.com/

See the full ranked list: The 11 Best Email Deliverability Tools. Or compare any two: side-by-side.