Slab vs Tettra
We give Slab a 3.6 GPA and Tettra a 3.0, out of 4.0. Slab grades higher on value for money and the free plan. They get the same grade on features, ease of use and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
Slab
Knowledge base and team wiki with search across connected tools
Tettra
Internal knowledge base that answers team questions in Slack
How we grade them
| 3.6GPASlabExcellent | 3.0GPATettraVery good | |
|---|---|---|
| Value for money | AStartup is $6.67 a person a month billed annually, about half what paid plans in this category typically start at. Even Business, with the API and SAML SSO, is $12.50. One catch: there are no read-only accounts, so everyone who can log in is a paid seat. | BScaling is $8 a user a month billed yearly, or $10 monthly, which is under what's typical here, and AI answers, the Slack bot and the API are all in. But the 10-user minimum sets the floor at ten seats, and SAML SSO and SCIM are paid add-ons unless you go Enterprise. |
| Free plan and trial | AFree for up to 10 people, with unlimited posts and topics, templates, verification and the search across your tools. A small team could stay here for good. No private topics and no AI on Free, though. | CNo free plan. The trial is a decent one, though: 30 days with all features included and no credit card required. When it ends, you need a card to carry on. |
| Features | APosts, Topics, a real-time editor, templates, and a search that covers your connected tools as well as Slab. A post can carry a verified banner with an expiry date, so someone gets nudged to recheck it. AI Ask and the API wait on Business. | APages you write or build from Google Docs and Markdown files, a store of answered questions, and Kai answering from all of it in Tettra and Slack. Experts verify pages on a schedule, and reports list what's stale or unowned. Read-only users, guests and page locking round it out. |
| Ease of use | BThere's no app store rating on record, so we can't lean on one. It's sign up in a browser and start writing, though: the editor handles the formatting for you and templates come with every plan. | BNo rating on record to go by, so a B is as high as we go. It's used in a browser and through Slack, so there's nothing to install, and you can bring in the Google Docs you already have. The interface is English-only. |
| Platforms and integrations | BWeb, Mac and Windows apps plus a Chrome extension, and it hooks into Slack, GitHub, Google Workspace, Jira and more. There's a GraphQL API from Business. But the downloads page lists no phone apps at all. | BWeb only: Tettra's site lists no desktop or mobile apps. It works through Slack and connects to Google Workspace, GitHub and Zapier, with API access on the Scaling plan. |
| Best for | a tidy team wiki that's free up to 10 people | Slack teams tired of answering the same question |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Slab and Tettra. How we grade
Where they differ
- Slab starts at $6.67 per user / month, billed annually ($8 billed monthly). Tettra starts at $8 per user / month, billed yearly ($10 billed monthly), 10-user minimum.
- Slab has a free plan. Tettra does not, though it has a free trial.
- Only Slab lists macOS and Windows apps.
- Only Slab lists a browser extension.
- Slab also covers templates and documents.
At a glance
| Slab | Tettra | |
|---|---|---|
| Pricing | Free plan | Free trial |
| Starts at | $6.67 per user / month, billed annually ($8 billed monthly) | $8 per user / month, billed yearly ($10 billed monthly), 10-user minimum |
| Free plan | Free plan for up to 10 users: unlimited posts and topics, real-time collaboration, templates, verification, unified search, 90 days of version history, 10 MB attachments and 10 standard integrations. | None |
| Free trial | None listed | Free 30-day trial with all features included, no credit card required |
| Web | ||
| macOS | ||
| Windows | ||
| Browser extension | ||
| Made by | Slab Inc. | Tettra, Inc. |
| Price read from | slab.com | tettra.com |
| Checked | Oct 5, 2026 | Oct 5, 2026 |
Who each one suits
Slab
- Teams of up to 10 that want a free internal wiki
- Companies that want one place to search docs and connected tools
- Non-profits and schools, which can get the Startup plan free
Tettra
- Slack-based teams that field the same questions repeatedly
- Support and operations teams building an internal knowledge base
- Companies that want to reuse existing Google Docs as a wiki
Worth knowing
Slab
- The Free plan stops at 10 users and has no private topics, no custom domain and no AI features.
- SAML-based SSO, SCIM, the API and webhooks need Business at $12.50 per user / month billed annually; audit logs are Enterprise only.
- Slab has no read-only accounts: billing counts every user who can log in, and guests are capped at 3 or 5 per user below Enterprise.
- The downloads page offers desktop apps for Mac and Windows and a Chrome extension, but lists no mobile apps.
Tettra
- There is no free plan: a card is required once the 30-day trial ends, and the Scaling plan has a 10-user minimum.
- Single sign-on (SAML) and SCIM provisioning are paid add-ons on Scaling and are included only in Enterprise.
- The app interface is English-only, although content can be written in any language.
- Tettra's site lists no desktop or mobile apps; it is used in a browser and through its Slack integration.
Key features
Slab
- Posts and Topics
- Content is written as posts and grouped into Topics, which organize related posts and give readers context. Posts and topics are unlimited on every plan.
- Real-time editor and templates
- The editor applies consistent formatting by default and lets several people work on a post at once. Templates are included on every plan.
- Unified Search
- One search box returns results from Slab content and from the tools connected to it, so answers stored elsewhere surface in the same list.
- Post verification
- A published post can be given a verifier and a review interval. A banner shows who verified it and when that expires, and verifiers are reminded to recheck it.
- AI Autofix, Predict and Ask
- Slab lists three AI capabilities: AI Autofix from the Startup plan, and AI Predict and AI Ask from Business. The Free plan includes none of them.
- Integrations, API and webhooks
- Standard integrations such as Slack, GitHub and Google Workspace are capped at 10 on Free. The GraphQL API, webhooks and premium integrations start on Business.
Tettra
- Internal knowledge base
- Pages are written in Tettra's editor or built from existing Google Docs, Markdown files and other content, then grouped into categories with unlimited version history.
- AI answers from Kai
- When someone asks a question in Tettra or Slack, the Kai bot searches the knowledge base and replies. If it finds nothing, it helps assign the question to the right person.
- Questions and answers
- Questions and their answers are stored alongside pages, so a question that has been answered once can be found again instead of asked again.
- Verification and content reports
- Subject-matter experts verify pages on a set schedule, teammates can request new pages or updates, and reports list stale, unowned and public content.
- Slack integration
- From Slack, teammates can search Tettra, get AI answers in channels and direct messages, summarize threads and turn existing answers into knowledge base content.
- Sharing and permissions
- Single pages can be shared by link and whole categories published as external sites. Read-only users, guest users, invite-only categories and page locking control access.
Plans
Slab
Free$0
Up to 10 users with unlimited posts and topics, 90 days of version history, 10 MB attachments and 10 standard integrations.
Startup$6.67
per user / month, billed annually ($8 billed monthly)
Unlimited users, 3 guests per user, private topics, AI Autofix, 365 days of version history, 25 MB attachments and unlimited standard integrations.
Business$12.50
per user / month, billed annually ($15 billed monthly)
5 guests per user, custom domains, AI Predict and AI Ask, SAML SSO, SCIM, the GraphQL API, webhooks, 3 premium integrations and an uptime SLA.
EnterpriseCustom
For at least 100 users: unlimited guests and premium integrations, audit logs, advanced AI Ask and dedicated support.
Tettra
Scaling$8
per user / month, billed yearly ($10 billed monthly)
10-user minimum. AI answers, the Kai bot in Slack, Google Workspace integration, verification, usage analytics and API access.
EnterpriseCustom
SSO and SCIM included, hands-on training, custom import and onboarding, custom reporting and priority support.
Ways to pay less
Slab
- Annual discount
About 17% lower with annual billing
Startup is $6.67 per user a month billed annually against $8 billed monthly, and Business is $12.50 against $15.
- Nonprofit
Startup plan free for nonprofits
Nonprofits can request the Startup plan at 100% off or the Business plan at 50% off, after registering a free team.
- Education
Startup plan free for educational use
The same request form covers educational use: the Startup plan is 100% free and the Business plan is 50% off.
Tettra
- Annual discount
20% off with yearly billing
Scaling is $8 per user a month billed yearly against $10 billed monthly. Tettra's pricing FAQ describes annual payment as earning two free months.
- Nonprofit
Non-profit pricing through sales
Tettra's pricing FAQ confirms discounted pricing for non-profit institutions, arranged through its sales team. No rate is published.
- Education
Educational pricing through sales
The same FAQ answer covers educational institutions, which are asked to contact the sales team for discounted pricing.
