Guru vs Slack AI vs Sakha: Which Is Best for Onboarding? (2026)

Guru, Slack AI, and Sakha get compared because all three touch employee knowledge, but they solve different problems. Guru and Slack AI are passive: they answer questions when someone asks. Sakha is active: it runs onboarding and answers questions. If your only need is better search over existing knowledge, a knowledge tool covers it. If you need to actually onboard new hires and guide them through their first weeks, that is a different job. This article maps the differences clearly so you can match the tool to what you actually need.

What does each one do?

Guru is a knowledge management platform. You create and maintain cards, and people search them or get answers, often with verification workflows to keep cards trusted. It is good at curated, verified company knowledge, and it is passive by design: it waits to be asked.

Slack AI adds search, summaries, and answers inside Slack, drawing on your existing Slack history and content. It is convenient because it lives where you already work, and it is also passive: it surfaces what is already there when you ask, but it does not run a process.

Sakha is an AI onboarding companion that lives in Slack. It answers questions from your knowledge base like the others, but it also proactively runs day-by-day onboarding flows, delivers scheduled steps, tracks each new hire's progress, and reviews employment documents and generates policies. It does the question-answering and the onboarding.

The key distinction: passive vs active

This is the whole comparison in one idea. A passive tool waits for a question. That is fine for an experienced employee who already knows what to search for. It fails a brand-new hire, who does not yet know what they do not know, and who will not think to search for the thing nobody told them exists.

Onboarding needs a tool that reaches out first: here is your day-one checklist, here is your team, here is what to do next, here is the policy you need today. That proactive guidance is the line between a knowledge tool and an onboarding companion. A new hire dropped into a workspace with only a search box still feels lost. A new hire who gets guided, and can also ask anything, feels onboarded.

Guru vs Slack AI vs Sakha

For where Sakha sits in the wider market, see best employee onboarding software. For building the knowledge layer specifically, see how to build an internal knowledge base in Slack.

Which should you choose?

• If you only need better search over existing knowledge, Slack AI or Guru covers that one job well. Pick based on whether you want a dedicated curated knowledge base (Guru) or search over your existing Slack content (Slack AI).
• If you need to onboard new hires, guide them day by day, answer their questions, and review their documents, that is Sakha. It includes the question-answering that Guru and Slack AI provide, and adds the active onboarding, progress tracking, and document review they do not.

The honest test: are you trying to help people find answers, or trying to bring new people up to speed? The first is a knowledge tool. The second is an onboarding companion, and onboarding is where retention is won. See AI onboarding vs traditional onboarding for how the active model changes outcomes.

They can coexist, but often you do not need both

Some teams keep Guru or Slack AI for general knowledge search and use Sakha specifically for onboarding, new hire question answering, and document review. That works. But because Sakha includes its own knowledge base with semantic search, many teams find they do not need a separate knowledge tool at all, especially given that flat platform pricing is usually cheaper than per-seat knowledge tooling across a whole company.

Why Sakha is the onboarding choice

Sakha gives you the knowledge question-answering that knowledge tools provide, plus the proactive onboarding flows, progress tracking, and document review they do not, all in Slack at a flat platform fee rather than per seat. Passive search waits for a question. An onboarding companion guides a new hire from day one to fully productive, and answers every question along the way. For the practical setup, see slack onboarding bot.