Where the answers come from
Pages your team must write, or documents you already have? Ask the vendor to answer three real questions from your own PDF during the demo.
Knowledge base software compared: nine tools, and the question to ask first. Does it answer the question, or does it return ten articles? Prices from the vendors' own pages, checked on 29 October 2026.
Knowledge base software is where a company keeps the answers its customers and staff keep asking for: help articles, manuals, procedures, price lists. Most tools are places to write and search articles; a few read the documents you already have and answer the question as asked. For most businesses SimplyBoost is the better choice: it reads your website, PDFs, Word files and CSVs, answers in the customer's language with the source shown, and does so on your website, WhatsApp and Instagram for customers and on a signed-in page for staff and dealers, at a flat €39 to €169 a month with no price per user, hosted in Europe. Notion, Slite and Tettra are the right pick when your team writes its knowledge as pages; Zendesk when you already run its helpdesk. The nine tools are compared below.
- No price per user
- Answers show their source
- Hosted in Europe, with a DPA
Last updated:
The three kinds of knowledge base software
Decide the kind before you compare tools. Most shortlists mix all three and end up comparing a wiki with an agent.
- Wikis and docs tools
- Notion, Slite, Tettra, Confluence. Your team writes pages; search and AI find them. Right when the knowledge is born as pages and someone owns keeping them current.
- Help centres
- KnowledgeBase.com, Helpjuice, Document360, Zendesk Guide. Public articles for customers, written by your support team, with a search box and sometimes an AI layer on top.
- Agents that answer
- SimplyBoost. The documents stay as they are; the agent reads them and answers the question, with the source. Nobody writes articles, and the same knowledge serves customers and staff.
- How to tell which you need
- Count your sources. If most answers already exist in PDFs, manuals and price lists, an agent is the shorter road. If they live in people's heads and need writing down, start with a wiki.
The best knowledge base software, compared
Prices from each vendor's pricing page on 29 October 2026, US list prices in dollars where the vendor prices in dollars. A vendor that does not publish a price is marked so.
| Tool | Kind | Who writes the knowledge | Answers or searches? | Price |
|---|---|---|---|---|
| SimplyBoost | AI agent on website, WhatsApp, Instagram and signed-in pages | Nobody: it reads your documents and an API feed | Answers, with the source, in the customer's language | €39, €89 or €169 a month flat, no price per user |
| Notion | Wiki and docs | Your team, page by page | Searches; AI agent on the Business plan | $10 a member a month on Plus, $20 on Business |
| Slite | Wiki with AI search | Your team | AI answers from Slite docs, 30 questions a seat a month on Basic | $10 a member a month on Basic, $20 on Pro, billed yearly |
| Tettra | Wiki for internal teams | Your team | AI answers from its pages | $8 a user a month, 10 users minimum |
| KnowledgeBase.com | Help centre | Your support team | Searches; AI writing help | $59 a month, or $49 billed yearly, unlimited seats |
| Helpjuice | Help centre | Your support team | AI answers on the AI plans | $249 a month for 30 users without AI, $449 for 100 users with AI, $799 unlimited |
| Document360 | Help centre with AI assistant | Your writers | AI search and answer included | Not published; priced per configuration on request |
| Guru | AI knowledge layer for large companies | Your team and connected tools | Cited answers across tools | Not published; one custom package, sales call |
| Zendesk Guide | Help centre inside the Zendesk helpdesk | Your support team | AI agents on Suite plans, charged per resolution | From $55 an agent a month on Suite Team, billed yearly |
Two patterns in the prices: wikis charge per member, so a 200-person company pays twenty times what a 10-person company pays; help centres charge per plan but want articles written. SimplyBoost charges per account and reads what you already have.
What to check before you pick knowledge base software
Who it serves
Customers on the website, staff on the intranet, dealers in a portal, or all three from one knowledge? Most tools pick one.
What a wrong answer looks like
A good tool shows the source and says when it does not know. A bad one invents a confident paragraph.
Languages
Can a German manual answer a Dutch question? SimplyBoost does; most wikis search in the language the page was written in.
Channels
A help centre lives on one URL. Your customers are on WhatsApp and Instagram, and your technicians on the road.
Hosting and data
Where it is hosted, whether there is a data processing agreement, how long conversations are kept, which AI model reads your documents.
How to choose in a week
- 1
List your sources
Count the PDFs, manuals, price lists and web pages that hold answers today. If it is more than twenty, you want a tool that reads them.
- 2
Write twenty questions
The ones your support team or your sales desk answers most, in the words people use.
- 3
Run two trials side by side
Give both tools the same documents and the same twenty questions. Count correct answers and honest 'I don't know' answers.
- 4
Price a strong month
Your headcount times the per-member price, or the flat plan. Add AI add-ons where they are extra.
- 5
Check the paperwork
Hosting location, data processing agreement, retention period, AI model. Then decide.
Knowledge base software questions
For most businesses SimplyBoost: it reads the documents you already have, answers customers and staff with the source shown, on the website, WhatsApp, Instagram and signed-in pages, at €39 to €169 a month with no price per user. Notion, Slite or Tettra if your team writes its knowledge as pages. Zendesk Guide if you already run the Zendesk helpdesk.
A wiki is pages people write and search. A knowledge base is the set of answers a company keeps; it can be a wiki, a help centre or, with AI, an agent that answers from documents. The difference that matters is whether someone has to write the pages.
Notion has a free plan for small teams, and most help centres have a trial. SimplyBoost has a 7-day trial with 100 AI answers. Free plans usually cap members, articles or AI questions.
In SimplyBoost, yes: three agents per account, the public one with public documents, the internal one with the price list and procedures on a signed-in page. Most wikis are internal only; most help centres are public only.
Wikis: $8 to $20 a member a month. Help centres: $49 to $799 a month depending on users and AI. SimplyBoost: €39, €89 or €169 a month for the whole account, AI included. Document360 and Guru do not publish prices.
SimplyBoost answers only from the documents you gave it and shows the source; when they are silent it says so and lists the question under Missing answers. Ask every vendor to show what happens when the documents do not contain the answer.
Read next
Try SimplyBoost with your own content
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