Stack Internal vs Zendesk Guide
Stack Internal
stackoverflow.co
Zendesk Guide
zendesk.comSide by side
| Figure | Stack Internal | Zendesk Guide |
|---|---|---|
| Price from | Free | $19/mo |
| Free plan | Yes | — |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Plans published | 3 | 10 |
| Spec score · Knowledge base software | 8.7 (#23) | 9.2 (#3) |
| Company founded | Stack Overflow was co-founded by Jeff Atwood and Joel Spolsky in 2008. | LinkedIn lists Zendesk as founded in 2007. |
| Company legal name | Crunchbase identifies the legal entity as Stack Exchange Inc. | The Google Play listing identifies the developer as Zendesk, Inc. |
| Free plan | Yes | No |
| Integrations | Listed integrations include ChatGPT, Claude Code, Confluence, Cursor, Gemini, GitHub, Jira, Notion, OpenAI, ServiceNow, Slack, Microsoft Teams and Google Docs. | Zendesk Marketplace lists more than 1,200 apps, connectors, themes and partners. |
| Rating on G2 | 4.5 out of 5 stars from 793 reviews | 4.3 out of 5 from 7,715 reviews |
| Security certifications | Business and Enterprise plans have SOC 2 Type II reports; Enterprise is ISO 27001 and ISO 27701 certified, with GDPR and SCC coverage stated. | Zendesk lists SOC 2 Type II, ISO 27001:2022, ISO 27018:2019, ISO 27701:2019, ISO 27017:2015, FedRAMP LI-SaaS and other certifications. |
| SSO support | Yes | Yes |
| What it does | Stack Internal is a knowledge platform that stores verified organizational answers for employees, teams and AI agents. | Zendesk Guide provides customizable internal, IT, agent-only and customer-facing knowledge bases with self-service access. |
Plans
Zendesk Guide
- Suite Team$55 a month
- Suite Professional$115 a month
- Suite Enterprise + CopilotPrice not published
- Support Team$19 a month
- Copilot add-on$50 a month
- Workforce Engagement Bundle add-on$50 a month
- Suite Team$55 a month
- Contact Center add-on$83 a month
- Suite Professional$115 a month
- Suite Enterprise + CopilotPriced on request
In their own words
Stack Internal
Stack Internal is a cloud knowledge product that delivers verified information to people, teams, and AI agents. It captures and synthesizes material from AI tools, chat threads, and wikis into knowledge units carrying authorship, recency, usage, provenance, and conflict signals. Teams arrange content in spaces and assign permissions to people, teams, and agents. Listed connectors cover Google Docs, Slack, Microsoft Teams, and Stack Internal Community, with an ingestion API for other tools. An MCP server connects AI assistants and coding agents, including Claude and Cursor, to the stored knowledge. AI search or answers and single sign-on are supported. The Free plan costs nothing for up to 50 teammates. Starter is also free, with up to three collaborators, 1,000 credits monthly, four connectors, a custom ingestion API, and unlimited ingestion. Organization pricing is based on required Knowledge Flow Credits and requires contacting sales. Security listings include ISO 27001/27701, SOC 2 Type II, SCIM, GDPR and SCC.
Zendesk Guide
Zendesk Guide has no write-up on Specifiction yet; its figures are above.