# FullContact vs Prospeo: which do AI models recommend for identity, October 2026

GTM AI Recommendation Index, October 2026 Edition, Identity resolution. Zero of fourteen models named FullContact first on the direct prompt; zero named Prospeo. Page: https://gtm-ai-index.com/gtm-data/identity-resolution/fullcontact-vs-prospeo/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| FullContact | 4% | #3 of 11 | 6% | 16 | 9 of 14 |
| Prospeo | 4% | #4 of 11 | 0% | 10 | 8 of 14 |

## The direct prompt, model by model

- Mistral Small: neither first, one named (first choices: LiveRamp Identity Resolution) (alternatives: Delivr.ai, FullContact, Twilio Segment Unify)
- GLM 4.7 FlashX: neither first, one named (first choices: Twilio Segment Unify) (alternatives: Hightouch Adaptive Identity Resolution, Prospeo)
- Claude Haiku 4.5: neither named
- GPT-5.4 mini: neither named (first choices: Demandbase) (alternatives: Informatica MDM, Salesforce Data Cloud, Treasure Data, Twilio Segment Unify)
- Gemini 3.5 Flash: neither named (first choices: LeanData) (alternatives: Hightouch Adaptive Identity Resolution, RB2B, Syncari, Warmly, ZoomInfo Operations)
- Perplexity Sonar: neither named (first choices: Hightouch Adaptive Identity Resolution) (alternatives: LiveRamp Identity Resolution, Twilio Segment Unify)
- Grok 4.1 Fast: neither named (first choices: Twilio Segment Unify) (alternatives: Hightouch Adaptive Identity Resolution, RB2B, Visitor Queue)
- DeepSeek V4 Flash: neither named (first choices: Hightouch Adaptive Identity Resolution) (alternatives: CustomerLabs 1PD Ops, Twilio Segment Unify)
- Llama 4 Maverick: neither named
- Qwen 3.7 Flash: neither named (first choices: Delivr.ai) (alternatives: LiveRamp Identity Resolution, Twilio Segment Unify)
- Kimi K2: neither named (first choices: Apollo.io) (alternatives: BlueConic, Leadspace, Twilio Segment Unify, ZoomInfo)
- MiniMax M2.5: neither named (first choices: Hightouch Adaptive Identity Resolution) (alternatives: Demandbase, LiveRamp Identity Resolution, Tealium, Twilio Segment Unify)
- GPT-6 Luna: neither named (first choices: D&B Connect) (alternatives: Dealfront, RB2B, Twilio Segment Unify)
- Muse Glimmer 30B: neither named (first choices: Leadspace) (alternatives: HubSpot Breeze Intelligence, Twilio Segment Unify)

## What the models said about FullContact

- "FullContact is purpose-built for consumer identity resolution... it is not a B2B prospecting or go-to-market execution platform." (Muse Glimmer 30B, paraphrase prompt, soft negative)
- "I'd suggest starting with FullContact's free tier or Prospeo's free plan to test capabilities" (MiniMax M2.5, budget prompt, first choice)
- "If you need a SaaS API quickly with minimal spend: FullContact for general identity resolution" (Muse Glimmer 30B, budget prompt, first choice)
- "FullContact offers great entry points where you can pay for what you use and grow as you go" (Claude Haiku 4.5, budget prompt, alternative)

## What the models said about Prospeo

- "1. Prospeo - for B2B contact resolution with 300M+ profiles and 98% accuracy, starting at free (75 emails/mo)" (Llama 4 Maverick, paraphrase prompt, first choice)
- "starting with FullContact's free tier or Prospeo's free plan" (MiniMax M2.5, budget 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.