Tettra review
Per-seat internal wiki with an AI answer bot built into Slack from the first paid tier
Unpaid review. We currently earn nothing if you sign up for Tettra — links here go straight to the vendor. We review it anyway because it's the honest answer, and scores never depend on commissions — how we test.
ToolsGavel verdict
Tettra is the cheapest per-seat AI-inclusive knowledge base in this group, as long as a buyer plans around the 10-user floor rather than the $8 headline. It earns its place on review strength and Slack-native AI, not on price alone.
Best for: Small teams already living in Slack that want AI-answered questions inside the channel they already use, without an upsell to unlock it
What we liked
- AI is included at the entry Scaling tier, the cheapest true per-seat price in this comparison that doesn't gate its answer-bot features to an upper tier the way Slab (Business, $12.50/user) or Helpjuice ($449/mo) do (tettra.com/pricing)
- G2 rates it 4.7 out of 5 from 161 reviews, with 84% landing at five stars and essentially no 1 or 2-star reviews in the breakdown (G2)
- The AI bot answers questions directly inside Slack, so a team that already lives there doesn't need a separate destination to check for an answer (tettra.com)
- A 30-day free trial with no credit card required gives a real test window before any commitment (tettra.com/pricing)
What to watch
- The advertised $8/user headline understates the real cost: a 10-user minimum on the Scaling plan means the true entry price is $80/mo even for a team of two or three (tettra.com/pricing)
- Search without the AI layer is described by reviewers as needing pretty exact keyword matches, implying the AI feature is doing real work the base search can't (secondary-source review synthesis)
- Formatting and page customization are described as limited next to larger wiki tools like Confluence, and imported documents may need manual cleanup (secondary-source review synthesis)
How much does Tettra really cost?
| Starting price | $8/user/mo |
|---|---|
| Permanent free tier | No |
| Price last verified | October 31, 2026, against the live pricing page at tettra.com |
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What Tettra is for
Tettra is an internal wiki built around one core idea: answer questions where the team already talks, which for most of its buyers is Slack. Instead of sending someone to a separate dashboard to search docs, the AI bot can answer directly inside a Slack channel, pulling from pages the team has already written. It also supports shareable public links for content a company wants outside readers to see, though the product’s center of gravity is internal documentation.
Pricing: the 10-user floor is the number that matters
Tettra’s $8/user/mo rate reads cheap until the 10-user minimum shows up. A 3-person team pays the same $80/mo as an 8-person team; the per-seat math only starts working in the buyer’s favor past 10 users. That’s still the cheapest AI-inclusive entry point in this comparison on a per-seat basis, since Slab gates its real AI Ask feature to a $12.50/user Business tier and Helpjuice gates all AI behind a $449/mo plan, but it’s worth budgeting the real $80/mo floor rather than the $8 headline.
Where it’s strong
The AI answer bot living inside Slack is the clearest differentiator. A team doesn’t need to remember a separate tool exists; the bot responds where the question got asked. Review strength backs this up: G2’s 4.7 out of 5 from 161 reviews, 84% of them five-star, is one of the cleaner rating distributions in this comparison, with almost no 1 or 2-star reviews pulling the average down. The 30-day free trial with no card required gives a team real room to test it against actual questions before paying anything.
Where it frays
Two things to weigh before signing up. The 10-user minimum means a small team’s real monthly cost is $80, not the advertised $8. And base search, without the AI layer doing the heavy lifting, is described in reviews as needing close-to-exact keyword matches, so the AI bot isn’t a bonus feature here so much as the thing making search usable at all.
Who should buy it
Buy Tettra if your team of 10 or more already lives in Slack and wants questions answered there instead of in a separate app, and the strong G2 track record matters to you. Skip it if your team is under 10 people and the 10-user floor makes the real price too high relative to KnowledgeOwl’s per-author model, or if you need a storefront-style public help center rather than an internal-first wiki. The full comparison sits in Best AI Knowledge Base Software for Small Teams.
Pricing note: Scaling costs $8 per user per month, but it carries a 10-user minimum, so the real entry price for even a 2-person team is $80/mo, not $8. That price includes the AI bot in Slack, AI-generated answers, automatic page tagging, and AI FAQ generation from day one, none of it gated to a higher tier. Enterprise moves to custom per-seat pricing with a discount past 250 licenses, plus SSO, SCIM, and hands-on onboarding. A 30-day free trial needs no credit card to start, though a card has to be added to convert to a paid plan once the trial ends.
Frequently asked questions
How much does Tettra actually cost?
Tettra lists $8 per user per month, but the Scaling plan has a 10-user minimum, so the real floor is $80/mo regardless of how many people actually use it. A team of 15 pays $120/mo; a team of 3 still pays $80/mo.
Is AI included on Tettra's cheapest plan?
Yes, from day one. The AI bot in Slack, AI-generated answers, automatic page tagging, and AI FAQ generation all ship on the entry Scaling tier, with no upsell required to unlock them.
Does Tettra support a public help center, or only internal docs?
Both. Tettra is internal-wiki-first by default, but it supports shareable public links for pages a company wants external readers to see, alongside gated internal content.
How good are Tettra's reviews?
Strong and consistent: G2 puts it at 4.7 out of 5 from 161 reviews, with 84% five-star and almost no 1 or 2-star ratings. Trustpilot's sample is just 1 review and complains about a forced account migration, too thin and too narrow to weigh against the G2 number.
Bottom line
Tettra is the cheapest per-seat AI-inclusive knowledge base in this group, as long as a buyer plans around the 10-user floor rather than the $8 headline. It earns its place on review strength and Slack-native AI, not on price alone.
Alternatives in AI Knowledge Base Software
An AI-first answer bot trained on your own docs, not a knowledge base with AI bolted on
Knowledge base software that bills by author and AI credits, not by how many people read your docs
A free-forever internal wiki whose AI answer bot waits behind the $12.50/user tier