# Knowledge base and self-service for enterprise buyers: what AI models recommend, September 2026

GTM AI Recommendation Index, September 2026 Edition. Asked as "knowledge base software" and as "customer self-service help center tool", six framings each, to twelve models with search on, on behalf of an enterprise B2B company. Page: https://gtm-ai-index.com/customer/knowledge-base-and-self-service/enterprise/

**Standing:** Zendesk leads with 26% of first choices; verdict contested. 43 first choices across the direct, paraphrase, budget and scale prompts.

## First-choice share

| # | Product | Share | Negative rate | Labels |
|---|---|---|---|---|
| 1 | Zendesk | 26% | 15% | 26 |
| 2 | Helpjuice | 19% | 21% | 14 |
| 3 | Confluence | 14% | 27% | 41 |
| 4 | Document360 | 9% | 14% | 37 |
| 5 | Zendesk Guide | 5% | 10% | 21 |
| 6 | Guru | 2% | 11% | 35 |
| 7 | Bloomfire | 2% | 4% | 23 |
| 8 | Freshdesk | 0% | 10% | 10 |
| 9 | Slite | 0% | 33% | 18 |
| 10 | SharePoint | 0% | 36% | 11 |
| 11 | Notion | 0% | 55% | 38 |

## Each model's first choice on the direct prompt

- Claude Haiku 4.5: no first choice; alternatives Bloomfire, Confluence, SharePoint, Slite
- GPT-5.4 mini: Confluence; alternatives Document360, Glean, Zendesk Guide
- Gemini 3.5 Flash: Document360; alternatives Atlassian Confluence, Guru, Shelf.io, Zendesk Guide
- Perplexity Sonar: Zendesk; alternatives Helply, Plain, Pylon
- Grok 4.1 Fast: Confluence; alternatives Guru, Shelf, Zendesk, eGain
- Mistral Small: Plain; alternatives Confluence, Document360, Freshdesk, Guru
- DeepSeek V4 Flash: Confluence, Document360, Guru; alternatives Notion, Plain, Pylon, Zendesk
- Llama 4 Maverick: no first choice
- Qwen 3.7 Flash: Pylon, Zendesk Guide; alternatives Atlassian Confluence, Document360, Plain
- Kimi K2: Document360; alternatives Confluence, Guru, Notion, Zendesk Guide
- GLM 4.7 FlashX: Pylon, Zendesk Guide; alternatives Document360, Helply
- MiniMax M2.5: Plain; alternatives Confluence, Document360, Pylon, Zendesk

## Sources the answers cite

22 of 72 answers came back with a source list, from 4 of 12 models. Sites named in the most answers:

- zendesk.com: 9 answers, 10 citations
- slite.com: 9 answers, 9 citations
- helply.com: 7 answers, 12 citations
- learn.g2.com: 7 answers, 8 citations
- helpjuice.com: 6 answers, 6 citations
- monday.com: 6 answers, 6 citations
- bloomfire.com: 5 answers, 7 citations
- saascrmreview.com: 5 answers, 5 citations

Pages named in the most answers:

- https://slite.com/learn/knowledge-base-softwares (9 answers)
- https://helpjuice.com/blog/knowledge-base-software-buying-guide (6 answers)
- https://monday.com/blog/service/enterprise-knowledge-base-platforms (6 answers)
- https://zendesk.com/service/help-center/knowledge-base-software (6 answers)
- https://helply.com/blog/best-knowledge-base-software-platforms (5 answers)
- https://learn.g2.com/best-knowledge-base-software (5 answers)
- https://saascrmreview.com/knowledge-base-software (5 answers)
- https://egain.com/best-knowledge-base-software-2026 (4 answers)
- https://thedigitalprojectmanager.com/tools/best-enterprise-knowledge-base-software (4 answers)
- https://assembly.com/blog/best-knowledge-base-software (3 answers)

## Warned against

- Notion: 21 of 38 labels negative. "Notion has no built-in content verification or stale content detection; wiki quality at 100 plus employees degrades predictably without a dedicated admin" (Claude Haiku 4.5, negative prompt)
- Confluence: 11 of 41 labels negative. "What to Avoid for Predictable Costs ... 1,000 users = $65K–$125K/year; costs grow linearly" (Kimi K2, budget prompt)
- Tettra: 5 of 8 labels negative. "one source explicitly says to *avoid Tettra* if your enterprise knowledge is read mainly in Microsoft Teams" (Perplexity Sonar, negative prompt)
- Document360: 5 of 37 labels negative. "Moved to custom pricing; unpredictable" (Kimi K2, budget prompt)

## Record

- Method: https://gtm-ai-index.com/methodology/
- Raw judge labels and full responses: https://gtm-ai-index.com/data/
- License: CC BY 4.0. Cite as GTM AI Recommendation Index, September 2026 Edition, gtm-ai-index.com.