The Stack Internal Insider’s Guide
Everything we know about Stack Internal in one document: what it costs, its grades, getting a refund, getting help and what else to look at. Read it here, or keep a copy.
Stack Internal
The Insider’s Guide
Verified company knowledge for teams and AI agents
Every plan, grade, refund rule and rival among docs and wiki tools, read from Stack Internal’s own pages.
Made by Stack Exchange Inc. · checked Oct 6, 2026 · toolgpa.com
Contents
- 01WelcomeWhat it is, who it suits, its grades and the ten things to know first
- 02What it costsEvery plan, the free plan, ways to pay less and how prices have moved
- 03What it doesIts main features, where it runs, what it works with and who makes it
- 04Where it standsIts grades against its category, and whether to keep it or make your own
- 05The alternativesThe tools it is most often weighed against, side by side
- 06Quick answersThe questions people ask about it, each answered in a line or two
- 07About ToolGPAWho made this guide, what else is on the site, and how to cite it
ToolGPA put this guide together from Stack Internal’s own pages, its app-store listings and our grades. Every fact in it is on Stack Internal’s page too, where it is kept up to date. Checked Oct 6, 2026.
Part 01 · Overview
Welcome
What it is, who it suits, its grades and the ten things to know first
2.2
GPA, above 4 of the 51 other docs and wiki tools we grade
Stack Internal, formerly Stack Overflow for Teams, is a knowledge platform from Stack Overflow. It captures what a company knows from tools such as Slack, Microsoft Teams and Google Docs, breaks it into units of knowledge and labels each one with trust signals such as authorship, recency and conflicts. That knowledge reaches people and AI agents through chat, a REST API and an MCP server, alongside the long-standing Q&A, Articles and Collections.
To get you started, here are 8 things to know about Stack Internal, taken from its own pages and our grades.
No app rating on record, and it does nothing until it's fed: Slack, Teams or Google Docs to connect, experts to confirm, scopes to lay out.
- 1
Best for giving AI agents company answers they can trust
Past that there's no published price, only a sales quote, and every search or answer spends credits that don't roll over.
- 2
There is a free plan
Starter plan: up to 3 collaborators and 1,000 credits a month, with 4 connectors, the custom ingestion API and the trust engine. It has no SSO, audit logs or health and usage insights.
- 3
It runs on Web
Web.
- 4
Automatic capture
Connectors for Slack, Microsoft Teams, Google Docs and Stack Internal Community, plus a custom ingestion API, pull content in and break it into reusable units of knowledge.
- 5
Trust engine and confidence labels
Answers carry reviewer, recency and corroboration labels, and conflicting information is flagged, so a reader can tell when knowledge is reliable or needs validating.
- 6
Expert validation
Subject-matter experts are detected automatically and can also be managed by hand. Critical gaps trigger a validation workflow routed to them through Slack.
- 7
A 2.2 GPA, above 4 of 51
That is against the other docs and wiki tools we grade, on value, the free plan, features, ease of use and platforms.
- 8
Keep it
To replace Stack Internal you would be making a search engine with an AI model behind it. That is not a weekend's work, with an AI app builder or without one.
Stack Internal at a glance
- Pricing
- Free plan
- Free plan
- Yes
- Free trial
- None stated
- Runs on
- Web
- Made by
- Stack Exchange Inc.
- Category
- Docs & Wikis
- Our grade
- 2.2 GPA, fair
The report card
Best for giving AI agents company answers they can trust
Stack Internal is what Stack Overflow for Teams turned into: it pulls what your company knows out of Slack, Microsoft Teams and Google Docs, labels how far each answer can be trusted, and hands it to people and AI agents. Starter is free for 3 people and 1,000 credits a month, with no SSO or audit logs. Past that there's no published price, only a sales quote, and every search or answer spends credits that don't roll over.
| Subject | Grade | Comment |
|---|---|---|
| Value for money | C | There's no price to weigh: the only paid plan, Organization, is quoted by sales according to how many credits you need, and that's where any unpriced tool lands. It's metered too, in Flow Credits: a search or answer costs 1 and an update 3, and unused ones don't roll over. |
| Free plan and trial | C | Starter is free with the trust engine, 4 connectors and the ingestion API, but the caps come quickly: 3 collaborators and 1,000 credits a month, nothing carried over, and no SSO, audit logs or usage insights. |
| Features | C | Each answer is labeled with its reviewer, recency and corroboration, conflicts are flagged, gaps go to your experts through Slack, and the old Q&A, Articles and Collections are still there. But it captures from four connectors and nothing else, with a custom API for the rest. |
| Ease of use | C | No app rating on record, and it does nothing until it's fed: Slack, Teams or Google Docs to connect, experts to confirm, scopes to lay out. Credits take some getting used to as well. Nothing to install, at least. |
| Platforms and integrations | B | A web app, with no desktop or phone apps listed at all. It connects to Slack, Microsoft Teams and Google Docs, and a REST API and an MCP server carry answers out to assistants like Claude and Cursor. |
An A is worth 4 points, a B 3, a C 2, a D 1 and an F nothing. The GPA is the average of the five.
Who Stack Internal is for
- Fits if your AI coding agents should read checked company knowledge instead of guessing
- Works for teams whose answers get buried in Slack or Microsoft Teams threads
Who it is not for
- Skip it if you want to see a price before talking to sales, as Organization is quote only
- Tight if you're more than 3 people and staying free, because Starter stops there, with 1,000 credits a month
- Not for you if you dislike metered use: a search or answer costs 1 credit, an update 3, and unused ones don't roll over
- Watch out: Starter has no SSO, audit logs or usage insights, and it captures from 4 connectors only
- Watch out: connecting a Stack Overflow enterprise Q&A instance needs a separate Community Enterprise plan, and it's web only
Good to know
Good for
- Engineering organizations grounding AI agents in their own verified knowledge
- Teams whose answers get buried in Slack or Microsoft Teams threads
- Groups of up to three people trying it on the free Starter plan
Worth knowing
- Usage is metered in Flow Credits: a search or answer uses 1 credit and an update uses 3. Credits reset each usage period and unused ones do not roll over.
- The free Starter plan allows 3 collaborators and 1,000 credits a month, and leaves out SSO, audit logs and health and usage insights.
- The Organization plan has no published price: it is quoted by sales according to the number of credits needed.
- Connecting a Stack Overflow enterprise Q&A instance requires a Stack Internal Community Enterprise plan.
Part 02 · Pricing
What it costs
Every plan, the free plan, ways to pay less and how prices have moved
2
plans to choose from
Stack Internal has a free plan.
Starter
Free
A workspace for up to 3 collaborators with 1,000 credits a month, 4 connectors, unlimited ingestion, the trust engine and standard permissions.
Organization
Custom
Unlimited collaborators and a customized monthly credit allowance, plus SSO, custom roles for people and AI agents, and a usage dashboard.
The free plan
Starter plan: up to 3 collaborators and 1,000 credits a month, with 4 connectors, the custom ingestion API and the trust engine. It has no SSO, audit logs or health and usage insights.
Read from stackoverflow.co on Oct 6, 2026.
Part 03 · Features
What it does
Its main features, where it runs, what it works with and who makes it
1
Place it runs: Web
Verified company knowledge for teams and AI agents. Here is what it does, as its own site describes it, and what it covers: public API, AI features, AI search, wiki.
But it captures from four connectors and nothing else, with a custom API for the rest.
- Automatic capture
- Connectors for Slack, Microsoft Teams, Google Docs and Stack Internal Community, plus a custom ingestion API, pull content in and break it into reusable units of knowledge.
- Trust engine and confidence labels
- Answers carry reviewer, recency and corroboration labels, and conflicting information is flagged, so a reader can tell when knowledge is reliable or needs validating.
- Expert validation
- Subject-matter experts are detected automatically and can also be managed by hand. Critical gaps trigger a validation workflow routed to them through Slack.
- Scopes and permissions
- Knowledge is organized into role-based Scopes so that people, teams and AI agents reach only what they should. Custom roles come with the Organization plan.
- Delivery to people and AI agents
- A chat interface, a REST API and an MCP server bring validated knowledge to people and to assistants and coding agents such as Claude and Cursor.
- Q&A, Articles and Collections
- The Community features keep Stack Overflow-style Q&A, long-form Articles, custom tags and curated Collections of related content.
Where it runs
- Web
What it works with
- Slack
- Microsoft Teams
- Google Docs
- Claude
- Cursor
Stack Internal is made by Stack Exchange Inc.
Part 04 · Standing
Where it stands
Its grades against its category, and whether to keep it or make your own
4/51
Other docs and wiki tools it is graded above
Stack Internal's GPA of 2.2 is higher than 4 of the 51 other docs and wiki tools we grade, and level with 8.
It stands best on platforms and integrations (B, above 10 of 51) and worst on features (C, above 1).
Each grade against the category
Every bar is all 52 docs and wiki tools we grade, cut by the letter each got. Stack Internal’s own letter is outlined.
- CValue for moneyAbove 10 of 51
- CFree plan and trialAbove 4 of 51
- CFeaturesAbove 1 of 51
- CEase of useAbove 9 of 51
- BPlatforms and integrationsAbove 10 of 51
Keep it, or make your own?
Whether this is something you could build for yourself with an AI app builder, and what you would give up.
Keep it
To replace Stack Internal you would be making a search engine with an AI model behind it. That is not a weekend's work, with an AI app builder or without one.
That makes this kind of software worth paying for, not this one in particular: 39 of the 51 other docs and wiki tools grade higher.
What you could make
- Wiki: an app builder makes this well.
What you could not
- A search engine with an AI model behind it.
- It plugs into other products, Slack, Microsoft Teams and Google Docs among them, and has an API.
- What a company asks for before it lets staff use something: roles and permissions.
What this rests on. Stack Internal’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
Part 05 · Alternatives
The alternatives
The tools it is most often weighed against, side by side
Guru, Tettra, Slite and Confluence
The 4 tools Stack Internal is most often weighed against, with where each one differs from it.
- 2.0GPA
Guru
Paid
Verified company knowledge base with AI search and agents.
- Stack Internal has a free plan. Guru does not.
- Only Guru lists a browser extension.
- Guru also covers templates and AI agents.
- 2.4GPA
Tettra
Free trial · from $8/mo
Internal knowledge base that answers team questions in Slack.
- Stack Internal has a free plan. Tettra does not, though it has a free trial.
- 2.8GPA
Slite
Free trial · from $10/mo
Team knowledge base with doc verification and AI answers.
- Stack Internal has a free plan. Slite does not, though it has a free trial.
- Only Slite lists macOS, Windows, iOS and Android apps.
- Only Slite lists a browser extension.
- 3.0GPA
Confluence
Free plan · from $6.70/mo
Team wiki and docs workspace from Atlassian, tied to Jira.
- Only Confluence lists iOS and Android apps.
- Stack Internal also covers AI search.
- Confluence also covers databases, whiteboard, templates and documents.
Part 06 · Questions
Quick answers
The questions people ask about it, each answered in a line or two
12
Questions, each answered in a line or two
The short version of everything above, for when you only need the answer. Each one is told in full in its part of the guide.
Is Stack Internal free?
Stack Internal has a free plan. Starter plan: up to 3 collaborators and 1,000 credits a month, with 4 connectors, the custom ingestion API and the trust engine.
How much does Stack Internal cost?
Stack Internal lists 2 plans. Starter: Free.
What platforms does Stack Internal work on?
Stack Internal is available on Web.
Does Stack Internal have an Android app?
No Android app was listed when its pages were read on Oct 6, 2026. Stack Internal is listed for Web.
Does Stack Internal have an iPhone app?
No iPhone app was listed when its pages were read on Oct 6, 2026. Stack Internal is listed for Web.
Is Stack Internal open source?
Stack Internal is not described as open source on its own site, as read on Oct 6, 2026.
Does Stack Internal have an API?
Yes. Stack Internal offers a public API, according to its own site.
What does Stack Internal integrate with?
Stack Internal's listing names Slack, Microsoft Teams, Google Docs, Claude and Cursor.
Who makes Stack Internal?
Stack Internal is made by Stack Exchange Inc.
What are the alternatives to Stack Internal?
The closest alternatives to Stack Internal in our directory are Guru, Tettra, Slite and Confluence.
How does Stack Internal compare with other docs and wiki tools?
Stack Internal's GPA of 2.2 is higher than 4 of the 51 other docs and wiki tools we grade, and level with 8.
Could I make my own version of Stack Internal?
To replace Stack Internal you would be making a search engine with an AI model behind it.
Where this guide comes from
The prices, plans, platforms and features were read from Stack Internal’s own pages on Oct 6, 2026, and the grades were given on Oct 10, 2026. Graded from this listing, whose facts were read from Stack Overflow's own pages on 6 October 2026. Also tested with a demo account on 2026-04-08.
Every tool we list gets five grades, A to F, each with its reason, and a GPA that averages them. How each is decided is at toolgpa.com/grades. This guide is ToolGPA’s own work; it is not made, paid for or approved by Stack Exchange Inc. Prices change, so check stackoverflow.co before you buy.
Part 07 · About
About ToolGPA
Who made this guide, what else is on the site, and how to cite it
3,189
Tools graded, in 94 categories
ToolGPA grades software the way a school report grades a pupil: five subjects, a letter for each with the reason written beside it, and a GPA that averages them. Prices, plans and platforms are read from each maker’s own pages and dated, so you always know how fresh a figure is.
Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Every tool on the site has a guide like this one, free to download and pass on. It all lives at toolgpa.com.
3,189
tools graded
94
categories
426
price changes on record
579
apps priced in 12 countries
What else is on toolgpa.com
- Stack Internal, kept up to dateEverything in this guide, with prices and grades as they are todaytoolgpa.com/tools/stack-internal
- How grades are givenThe rules behind every letter and every GPAtoolgpa.com/grades
- Value chartsWhat each tool costs against what it scores, for every categorytoolgpa.com/charts
- CompareAny two tools side by side, plan by plantoolgpa.com/compare
- Price changesEvery price rise and cut on record, each with its sourcetoolgpa.com/price-changes
- Prices by countryWhat apps cost on the App Store in 12 countriestoolgpa.com/prices-by-country
- Pay lessEvery public discount: yearly billing, students, nonprofitstoolgpa.com/save
- Keep or makeWhich tools are worth paying for, and which you could build yourselftoolgpa.com/keep-or-make
Scan for the live page
Prices and grades as they are today
Quoting this guide?
Please name ToolGPA and link to the live page, so readers can check the figures for themselves:
ToolGPA, "Stack Internal: The Insider's Guide", checked Oct 6, 2026. https://toolgpa.com/tools/stack-internal
Know someone choosing between docs and wiki tools?
Send them this guide: toolgpa.com/tools/stack-internal/guide
ToolGPA elsewhere: youtube.com/@toolgpa
See our other guides
The best-graded docs and wiki tools after Stack Internal, each with an Insider's Guide of its own.
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- Google Docs Insider's GuideBrowser-based word processor, free with a Google Account3.4 GPA
- ONLYOFFICE Insider's GuideOpen-source office suite for documents, sheets, slides and PDFs3.4 GPA
Choosing software? Every tool graded, every price dated.
Compare tools at toolgpa.com ›Everything in this guide is ToolGPA’s own summary of what Stack Internal’s pages, its app-store listings and public reviews said on the dates shown. Grades are our judgement under the rules at toolgpa.com/grades. Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Stack Internal is a trademark of its owner, and this guide is not made, paid for or approved by Stack Exchange Inc. Prices and plans change: check stackoverflow.co before you buy.