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Stack Internal

stackoverflow.co

Free plan WebAPI
Visit stackoverflow.co
Spec score 8.7 #23 of 138 in Knowledge base software

What it is

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.

Spec sheet

What it does
Stack Internal is a knowledge platform that stores verified organizational answers for employees, teams and AI agents.Read 15 Oct 2026 · stackoverflow.co
Purpose
Stack Internal delivers verified knowledge to people, teams, and AI agents.Read 8 Oct 2026 · stackoverflow.co
Intended users
The maker describes Stack Internal as a knowledge intelligence ecosystem for enterprises and says it is used by over 20,000 organizations.Read 8 Oct 2026 · stackoverflow.co
Free plan
YesRead 23 Sep 2026 · stackoverflow.co
Integrations
Listed integrations include ChatGPT, Claude Code, Confluence, Cursor, Gemini, GitHub, Jira, Notion, OpenAI, ServiceNow, Slack, Microsoft Teams and Google Docs.Read 15 Oct 2026 · stackoverflow.co
Support
Starter includes standard self-service support, while Organization includes dedicated enterprise account management.Read 8 Oct 2026 · stackoverflow.co
AI access
Its MCP server connects AI assistants and coding agents, including Claude and Cursor, to Stack Internal knowledge.Read 8 Oct 2026 · stackoverflow.co
AI model
Stack Internal states that it uses Azure OpenAI GPT-4o mini for its AI functionality.Read 15 Oct 2026 · stackoverflow.co
AI training
The maker says it does not use customer data for model training.Read 8 Oct 2026 · stackoverflow.co
API authentication
Community API v3 uses OAuth tokens, supports read-only and read-write scopes, and offers persistent service applications for integrations.Read 15 Oct 2026 · support.stackenterprise.co
API capabilities
Stack Internal APIs support sign-in, ingestion, search, chat, administration, reporting, reads and writes.Read 15 Oct 2026 · support.stackinternal.com
API rate limits
New Community customers after October 1, 2025 receive 500 calls per day per application and 1,000 across applications unless they buy Premium API.Read 15 Oct 2026 · support.stackenterprise.co
Capture
It automatically captures and synthesizes data from AI tools, chat threads, and wikis into units of knowledge.Read 8 Oct 2026 · stackoverflow.co
Community API
Stack Internal Community API v3 is available at each customer site with interactive Swagger documentation and downloadable endpoint definitions.Read 15 Oct 2026 · support.stackenterprise.co
Company founded
Stack Overflow was co-founded by Jeff Atwood and Joel Spolsky in 2008.Read 15 Oct 2026 · crunchbase.com
Company headquarters and size
LinkedIn lists New York, New York headquarters and a 201–500 employee company size.Read 15 Oct 2026 · uk.linkedin.com
Company legal name
Crunchbase identifies the legal entity as Stack Exchange Inc.Read 15 Oct 2026 · crunchbase.com
Credit limits
Starter includes up to 1,000 credits per month; credits reset each plan usage period and unused credits do not roll over.Read 8 Oct 2026 · stackoverflow.co
Data protection
The service requires HTTPS, encrypts data in transit and at rest, uses SQL Transparent Data Encryption and AES-256, and says customer data is not used to train models.Read 15 Oct 2026 · stackoverflow.co
Documentation and setup
The administrator quickstart covers SSO, content-source configuration, Slack and Google Docs connections, MCP activation and API guidance.Read 15 Oct 2026 · support.stackinternal.com
Encryption
The security FAQ says data is encrypted in transit and at rest, and Azure data at rest uses AES-256.Read 8 Oct 2026 · stackoverflow.co
Governance
Administrators can manage permissions, curation activity and audit logs for people, teams and AI agents.Read 15 Oct 2026 · stackoverflow.co
Hosting model
Official materials describe Azure-hosted Business and Enterprise cloud options and do not document customer self-hosting or on-premises installation.Read 15 Oct 2026 · stackoverflow.co
Knowledge capture
It ingests scattered information from AI tools, chats, wikis, files and connected sources into reusable knowledge units.Read 15 Oct 2026 · stackoverflow.co
Knowledge validation
Each knowledge item carries provenance, authorship, recency, usage and conflict signals, with SME validation routing for gaps.Read 15 Oct 2026 · stackoverflow.co
Limit: adoption and small teams
TrustRadius reviewers say small organizations may lack enough activity to justify the product and that daily adoption can be difficult.Read 15 Oct 2026 · trustradius.com
Limit: long-form documentation
Reviewers say the Q&A structure is weaker for lengthy formal documentation and that organization becomes difficult as content grows.Read 15 Oct 2026 · trustradius.com
Limit: no on-site server
A verified Capterra reviewer criticized the lack of an on-site server because the database is cloud-only.Read 15 Oct 2026 · capterra.com
Limit: search quality
Reviewers report difficulty finding the exact answer, duplicate answers and search limitations.Read 15 Oct 2026 · capterra.com
MCP support
An MCP server connects AI assistants and coding agents to Stack Internal knowledge inside existing workflows.Read 15 Oct 2026 · stackoverflow.co
Notable news: platform release
On July 30, 2026, Stack Overflow announced a new Stack Internal platform experience with automatic ingestion, confidence labels, provenance cards, API and MCP integrations.Read 15 Oct 2026 · stackoverflow.blog
Owner and acquisition
Prosus announced an agreement to acquire Stack Overflow for approximately $1.8 billion in June 2021.Read 15 Oct 2026 · prosus.com
Permission-aware access
Content is filtered by the sessions, folders and channels an organization permits, limiting exposure of sensitive information.Read 15 Oct 2026 · stackoverflow.co
Permissions
The product organizes content into spaces and lets teams set permissions for people, teams, and agents.Read 8 Oct 2026 · stackoverflow.co
Praise: collaboration and integrations
Capterra reviewers highlight team collaboration, voting, real-time answer improvement and integrations such as Microsoft Teams, Slack, Jira and GitHub.Read 15 Oct 2026 · capterra.com
Praise: search and knowledge sharing
TrustRadius reviewers repeatedly praise searchable answers, tagging, upvotes, centralized knowledge and faster onboarding or troubleshooting.Read 15 Oct 2026 · trustradius.com
Rating on Capterra
4.7 out of 5 from 70 reviewsRead 15 Oct 2026 · capterra.com
Rating on G2
4.5 out of 5 stars from 793 reviewsRead 15 Oct 2026 · g2.com
Rating on Trustpilot
1.7 out of 5 from 226 reviews on the Stack Overflow profileRead 15 Oct 2026 · trustpilot.com
Rating on TrustRadius
8.3 out of 10 from 14 reviews and ratingsRead 15 Oct 2026 · trustradius.com
REST API and SDK
The pricing comparison describes an OpenAPI/Swagger REST API and SDK for integrating commercial or homegrown applications.Read 15 Oct 2026 · stackoverflow.co
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.Read 15 Oct 2026 · stackoverflow.co
SSO support
YesRead 23 Sep 2026 · stackoverflow.co
Tenant isolation
Enterprise instances run in isolated Azure virtual networks, while Business uses multi-tenant infrastructure with logical database separation.Read 15 Oct 2026 · stackoverflow.co
Trust scoring
The product provides confidence labels and machine-facing trust scores to help agents select reliable answers.Read 15 Oct 2026 · stackoverflow.co
Trust signals
Knowledge includes authorship, recency, usage, provenance, and conflict detection signals.Read 8 Oct 2026 · stackoverflow.co

Plans and prices

Free Free Up to 50 teammates Read 23 Sep 2026 · stackoverflow.co
Starter Free Up to 1,000 credits/month · Up to 3 collaborators · 4 connectors and custom ingestion API · Unlimited reads · Unlimited ingestion · Standard permissions and self-service support Read 15 Oct 2026 · stackoverflow.co
Organization Priced on request Annual commitment; invoice billing available Customized credits/month · Unlimited collaborators · Unlimited reads and additions · Custom roles and permissions · SSO · Audit logs · Dedicated account management Read 15 Oct 2026 · stackoverflow.co

Every Stack Internal plan and price →

Strong points and limits

Strong points

  • Knowledge units include provenance and conflict signals
  • Connectors for Google Docs, Slack, and Teams
  • MCP access for listed AI assistants
  • Single sign-on and permission controls
  • Free plans include ingestion capabilities

Limits

  • Starter credits reset and do not roll over
  • Starter is limited to three collaborators
  • Cloud deployment only

Who it suits

It suits enterprises that need governed knowledge for staff and AI agents, with permissions, connectors, and searchable answers. Teams can choose free tiers or request an Organization plan with dedicated account management.

Verdict

Stack Internal combines captured workplace knowledge with permissions, connectors, and AI-agent access. The free tiers are specified clearly, while larger deployments must size credits and contact sales.

Where Specifiction places it

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