Tettra is a Slack wiki. Helpable is a customer help center.
Tettra helps your team answer each other in Slack. Helpable helps your customers answer themselves, with AI search, public articles, and a widget in your product.
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Why Tettra is not built for customers
Tettra is a Slack-native wiki that makes internal Q&A faster. But customer-facing support needs public pages, search engine visibility, and AI that serves answers directly to the people using your product.
Tettra lives inside Slack
Tettra is built around Slack workflows: team members ask questions, experts answer, and the answers become wiki pages. That is great for internal knowledge. But your customers are not in your Slack workspace. They need a public help center they can browse and search.
No public URLs or SEO
Tettra pages are private by default. They do not generate sitemaps, structured data, or hreflang tags. Google cannot index them, and AI tools like ChatGPT cannot cite them. Helpable publishes every article on an indexable URL with four schema types.
No AI assistant for end users
Tettra has a Slack bot that helps teammates find internal docs. Helpable has Calli, a customer-facing AI that answers questions from your articles, provides source links, and escalates to your inbox when it needs a human.
Per-user pricing with a 10-user minimum
Tettra starts at $4/user/month with a 10-user minimum, so the entry point is $40/month for an internal wiki. Helpable Starter is $29/month for a customer-facing help center with AI answers, and Pro is $79/month with unlimited team members.
Helpable vs Tettra: feature comparison.
| Feature | Helpable | Tettra |
|---|---|---|
| Primary purpose | ✓ Customer-facing help center | Slack-first internal wiki |
| Starting price | $29/mo (Starter) | $4/user/mo (10-user min = $40/mo) |
| Team plan cost | $79/mo (Pro, unlimited users) | $4/user/mo (scales linearly) |
| AI assistant for customers | ✓ Calli (included) | ✗ Slack bot only |
| Public help center | ✓ SEO-optimized | ✗ Internal only |
| Custom domain + SSL | ✓ All plans | ✗ Not applicable |
| Embeddable widget | ✓ Included | ✗ Not available |
| SEO structured data | ✓ 4 schema types | ✗ None |
| Contact inbox | ✓ With AI context | ✗ Not available |
| Multilingual (50+ languages) | ✓ Automatic hreflang | ✗ No multilingual support |
| Slack integration | Not Slack-native | ✓ Deep Slack integration |
| Setup time | 5 minutes | Minutes (Slack-connected) |
When Tettra is the right choice
If your team lives in Slack and you want a wiki that captures tribal knowledge from Slack conversations, Tettra is purpose-built for that workflow. It turns Q&A threads into wiki pages automatically.
When Helpable is the right choice
If your customers need answers without joining your Slack, and you want those answers to rank on Google and get cited by AI, Helpable is the tool for that. Many teams run both: Tettra for the team, Helpable for the customer.
Tettra pricing vs Helpable: what you actually pay.
Tettra charges $4/user/month with a 10-user minimum ($40/month entry point). A 25-person team pays $100/month for an internal Slack wiki. Helpable Starter is $29/month (1 user, 2,500 Calli answers). Pro is $79/month with unlimited team members, 10,000 AI answers, and a public help center on your custom domain.
Competitor pricing verified April 2026. Prices may vary by region.
What Helpable gives your customers.
A searchable help center on your domain. AI that answers from your articles. A widget inside your product. SEO that drives organic traffic. Starting at $29/mo.
Calli AI answers customer questions
Conversational AI grounded in your articles. Provides source links. Escalates to your inbox with full context when it cannot help.
SEO and AI visibility built in
FAQPage, HowTo, Article, BreadcrumbList schema on every article. Sitemap, robots.txt, hreflang, custom domain. Your content appears in Google and ChatGPT.
Embeddable widget
One script tag. Floating help button in your product. Customers search and ask Calli without leaving the page.
Contact inbox with context
When Calli cannot answer, the customer gets a contact form. The form lands in your inbox with the full AI conversation attached.
“Tettra was perfect for our team wiki in Slack, but customers kept asking the same questions over email. We added Helpable and support volume dropped by a third within six weeks.”
Alex P., Head of Support, Routewise (Routing SaaS, 30-person team)
“We tried making Tettra pages public, but there was no SEO, no widget, no AI search. Helpable gave us all three on day one. Our docs now show up in Google and ChatGPT.”
Sophie M., Product Lead, Teamgrid (Project management tool)
Is Tettra a customer help center?
No. Tettra is a Slack-first internal wiki. It is designed for team Q&A inside Slack, not for customer-facing documentation. Helpable is built specifically for customer self-service with public articles, AI answers, and SEO.
Can I use both Tettra and Helpable?
Yes. Use Tettra for your internal Slack-based knowledge management and Helpable for your customer-facing help center. They solve different problems and complement each other.
How does Helpable pricing compare to Tettra?
Tettra is $4/user/month with a 10-user minimum ($40/month). Helpable Starter is $29/month, Pro is $79/month with unlimited team members. Helpable includes AI answers, SEO, and a widget that Tettra does not offer.
Does Helpable integrate with Slack?
Helpable focuses on customer-facing channels: your help center, widget, and inbox. Tettra is built around Slack. You can run both side by side for internal and external knowledge.
Will my help articles be visible to AI tools?
Yes. Helpable generates FAQPage, HowTo, Article, and BreadcrumbList structured data automatically. Your articles appear in Google, ChatGPT, Perplexity, and other AI-powered search tools.
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Your customers are not in your Slack. Give them a help center.
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Starter $29/mo · Pro $79/mo · Scale $199/mo