# StackAdapt vs Libsyn Ads: which do AI models recommend for audio advertising, October 2026

GTM AI Recommendation Index, October 2026 Edition, Audio and podcast advertising. Eight of fourteen models named StackAdapt first on the direct prompt; zero named Libsyn Ads. Page: https://gtm-ai-index.com/marketing/audio-and-podcast-advertising/stackadapt-vs-libsyn-ads/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| StackAdapt | 20% | #2 of 11 | 0% | 19 | 11 of 14 |
| Libsyn Ads | 2% | #5 of 11 | 9% | 22 | 11 of 14 |

## The direct prompt, model by model

- Claude Haiku 4.5: stackadapt first (first choices: StackAdapt) (alternatives: Acast, Hey Sid, Spotify Advertising)
- Gemini 3.5 Flash: stackadapt first (first choices: StackAdapt) (alternatives: AdsWizz, Demandbase, SXM Media, Terminus)
- Perplexity Sonar: stackadapt first (first choices: StackAdapt) (alternatives: Spotify Ads Manager)
- Grok 4.1 Fast: stackadapt first (first choices: StackAdapt) (alternatives: AdsWizz AudioMax, Megaphone, Spotify Audience Network, The Trade Desk)
- Mistral Small: stackadapt first (first choices: StackAdapt, The Trade Desk) (alternatives: Spotify Advertising)
- DeepSeek V4 Flash: stackadapt first (first choices: StackAdapt) (alternatives: AudioGo, Intentsify)
- Qwen 3.7 Flash: stackadapt first (first choices: StackAdapt) (alternatives: Hey Sid)
- MiniMax M2.5: stackadapt first (first choices: StackAdapt) (alternatives: Spotify Ads, The Trade Desk)
- Llama 4 Maverick: neither first, one named (first choices: Triton Digital) (alternatives: AudioGo, StackAdapt)
- GLM 4.7 FlashX: neither first, one named (first choices: Hey Sid) (alternatives: Libsyn Ads, Spotify Ads, StackAdapt)
- GPT-5.4 mini: neither named (first choices: Spotify Ads Manager) (alternatives: Amazon Ads, Amazon DSP)
- Kimi K2: neither named (first choices: Acast, AudioGo) (alternatives: B2B PodPros, Hey Sid, Spotify Ad Studio)
- GPT-6 Luna: neither named (first choices: Spotify Ads Manager) (alternatives: Acast)
- Muse Glimmer 30B: neither named (first choices: AudioGo) (alternatives: Hey Sid, Spotify Ad Studio)

## What the models said about Libsyn Ads

- "Drawbacks: Limited to specific genres and audiences; low scalability for general consumer brands." (Muse Glimmer 30B, negative prompt, soft negative)
- "Cheaper CPM (~$12-26), but bigger min." (Grok 4.1 Fast, budget prompt, soft negative)
- "For better alternatives, consider platforms like Podbean or Libsyn Ads, which tend to offer more favorable terms for creators." (Claude Haiku 4.5, negative prompt, first choice)
- "Libsyn Ads (70/30 split, $24-26 CPM, transparent) | Published rates, IAB-aligned, established track record" (DeepSeek V4 Flash, negative prompt, first choice)
- "Safer alternatives: Libsyn Ads (transparent 70/30 splits for mid-tier shows)" (Grok 4.1 Fast, negative prompt, first choice)

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.