# StackAdapt vs Acast: 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; one named Acast. Page: https://gtm-ai-index.com/marketing/audio-and-podcast-advertising/stackadapt-vs-acast/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| StackAdapt | 20% | #2 of 11 | 0% | 19 | 11 of 14 |
| Acast | 7% | #4 of 11 | 11% | 35 | 14 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)
- Kimi K2: acast first (first choices: Acast, AudioGo) (alternatives: B2B PodPros, Hey Sid, Spotify Ad Studio)
- 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-6 Luna: neither first, one named (first choices: Spotify Ads Manager) (alternatives: Acast)
- GPT-5.4 mini: neither named (first choices: Spotify Ads Manager) (alternatives: Amazon Ads, Amazon DSP)
- Muse Glimmer 30B: neither named (first choices: AudioGo) (alternatives: Hey Sid, Spotify Ad Studio)

## What the models said about Acast

- "Avoid Acast self-serve under $5K budget — you'll get run-of-network junk." (DeepSeek V4 Flash, negative prompt, hard negative)
- "Acast's managed campaigns require significant budgets, typically starting at $10,000 to $15,000" (Mistral Small, negative prompt, soft negative)
- "Drawbacks: Smaller scale compared to Spotify; higher pricing for premium inventory." (Muse Glimmer 30B, negative prompt, soft negative)
- "Acast: The Open Ecosystem Leader ... Best For: Global programmatic scale, cross-app reach, and multi-tier budgets." (Gemini 3.5 Flash, comparative prompt, first choice)
- "Acast offers the widest reach in a single buy with in-file delivery across 140,000 shows on every major app" (Claude Haiku 4.5, comparative prompt, first choice)
- "Strongest for broad reach across 140,000+ independent shows; ads stitched directly into episode files via DAI" (Grok 4.1 Fast, comparative 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.