# Folderly vs Validity Everest: which do AI models recommend for email deliverability, October 2026

GTM AI Recommendation Index, October 2026 Edition, Email deliverability and testing tools. Two of fourteen models named Folderly first on the direct prompt; one named Validity Everest. Page: https://gtm-ai-index.com/marketing/email-deliverability-and-testing/folderly-vs-validity-everest/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Folderly | 3% | #6 of 12 | 5% | 20 | 11 of 14 |
| Validity Everest | 3% | #8 of 12 | 26% | 27 | 12 of 14 |

## The direct prompt, model by model

- Mistral Small: folderly first (first choices: Folderly, GlockApps) (alternatives: MailReach, Zoho CRM)
- MiniMax M2.5: folderly first (first choices: Folderly, Mailtrap) (alternatives: EasyDMARC, MXToolbox)
- GPT-6 Luna: validity everest first (first choices: Validity Everest) (alternatives: GlockApps)
- Claude Haiku 4.5: neither first, one named (first choices: InboxArmy, MailBrace) (alternatives: Folderly, GlockApps, HubSpot, Mailsoftly)
- Grok 4.1 Fast: neither first, one named (first choices: GlockApps) (alternatives: MailReach, Validity Everest, Warmy.io)
- GLM 4.7 FlashX: neither first, one named (first choices: GlockApps, MailReach) (alternatives: Folderly, Warmy)
- Muse Glimmer 30B: neither first, one named (first choices: GlockApps) (alternatives: MailReach, Validity Everest)
- GPT-5.4 mini: neither named (first choices: Mailgun Optimize) (alternatives: GlockApps)
- Gemini 3.5 Flash: neither named (first choices: Allegrow, GlockApps) (alternatives: Mailgun Optimize, ZeroBounce)
- Perplexity Sonar: neither named (first choices: GlockApps) (alternatives: Amplemarket, MailReach, NeverBounce)
- DeepSeek V4 Flash: neither named (first choices: MailReach) (alternatives: GlockApps, Google Postmaster Tools, MXToolbox)
- Llama 4 Maverick: neither named (first choices: GlockApps)
- Qwen 3.7 Flash: neither named (first choices: GlockApps) (alternatives: 250ok, Instantly, Kickbox, Lemlist, Valimail, ZeroBounce)
- Kimi K2: neither named (first choices: GlockApps, Instantly) (alternatives: HubSpot Sales Hub, MailReach)

## What the models said about Folderly

- "Overpriced for most mid-market teams — many reviewers suggest MailReach as a better-value alternative." (DeepSeek V4 Flash, direct prompt, soft negative)
- "Folderly and GlockApps are top choices due to their comprehensive features and strong reputations" (Mistral Small, direct prompt, first choice)
- "Folderly or Mailtrap would be the top choices." (MiniMax M2.5, direct prompt, first choice)
- "Built specifically for B2B sales teams and lead-generation agencies running cold-email campaigns at scale" (Claude Haiku 4.5, direct prompt, alternative)

## What the models said about Validity Everest

- "its pricing often starts at $20,000 to $65,000/year, making it massive overkill and too expensive for most mid-sized operations" (Gemini 3.5 Flash, paraphrase prompt, soft negative)
- "enterprise suites like *Validity Everest* (which can cost upward of $15,000/year) to be too complex and cost-prohibitive" (Gemini 3.5 Flash, direct prompt, soft negative)
- "The gold standard for enterprise, but likely overkill for mid-sized companies on both features and budget." (DeepSeek V4 Flash, paraphrase prompt, soft negative)
- "The gold standard for larger mid-market and enterprise brands. Extremely deep seed-testing network and comprehensive reputation monitoring, though highly priced." (Gemini 3.5 Flash, scale prompt, first choice)
- "My default pick: Validity Everest" (GPT-6 Luna, direct prompt, first choice)
- "Everest is the largest and most robust platform in the space... generally cost-prohibitive for SMBs." (Gemini 3.5 Flash, comparative prompt, alternative)

Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all fourteen models, for a mid-market B2B company; rank is within the category. Comparisons are drawn for the top eight products in each category. Published under CC BY 4.0; the output is the models' output, and nothing here is a recommendation by the index.