Notion vs Confluence vs Guru vs Slab vs Document360 - 2025 Honest Review & Comparison

Why Finding the Right Documentation & Knowledge Tool Matters in 2025

I’ve tested a weird number of documentation tools over the last couple years—some for internal wikis, some for customer-facing help centers, and some because a team swore this one would finally “fix knowledge.” (Spoiler: no tool fixes knowledge. People do… but the right tool makes it way less painful.)

And 2025 is kind of a breaking point.

Teams are moving faster, shipping more, hiring globally, and relying on AI summaries that are only as good as the source material. Meanwhile, the average company’s “documentation system” is still a messy pile: half in Google Docs, half in Slack threads, a quarter in someone’s head (yes, that math is wrong… that’s the point), and the rest sprinkled across ticket notes and Notion pages nobody owns.

Here’s what’s changed: documentation isn’t just “write it down.” It’s now:

• Search + trust (can I find it, and do I believe it?)
• Workflow (does it get reviewed, updated, and retired?)
• Context (does it show up where people work—Slack, Jira, Chrome, Zendesk?)
• Governance (permissions, versioning, audit trails… the boring stuff that becomes urgent at 500+ employees)

When I was setting this up for a support + product org last year, the biggest friction wasn’t writing articles. It was deciding where the truth lives—and then getting everyone to stop creating “just one more doc” somewhere else. That’s the real game.

So let’s compare the big players in 2025—Notion, Confluence, Guru, Slab, Document360, and Zendesk Guide—with the tradeoffs people don’t mention until you’re already knee-deep in migration hell.

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Quick Verdict: The TL;DR

• Best overall (most versatile): Notion — if you want docs + lightweight project organization in one place and you can tolerate a bit of governance mess.
• Best for engineering-led teams: Confluence — especially if you live in Jira/Atlassian and need structure that won’t collapse at scale.
• Best for “answers in the flow of work”: Guru — the browser extension + verification workflow is the closest thing to “institutional memory” that actually sticks.
• Best for small teams that just want a clean wiki: Slab — fast, simple, searchable… less “workspace sprawl” than Notion.
• Best for serious customer/public documentation: Document360 — purpose-built knowledge base controls and versioning (and yeah, the pricing is a different universe).

If you’re on Zendesk already and your priority is ticket deflection, Zendesk Guide is the obvious “don’t overthink it” choice.

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Master Comparison Table

(Ratings cited from G2 as provided; always double-check current listings because they drift over time.)

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Notion - Full Review (350-400 words)

Notion is the Swiss Army knife of knowledge tools. Which is awesome… and occasionally a problem.

At its best, Notion feels like walking into a perfectly organized kitchen where every drawer is labeled and every spice has a little jar. At its worst, it’s a kitchen where everyone keeps buying new utensils because they can’t find the old ones. (Actually, let me walk that back—sometimes they can find them, they just don’t trust them.)

Key features

• Docs + nested pages for wiki-style content
• Databases (tables, boards, calendars) that can power knowledge indexes, SOP libraries, onboarding trackers
• Templates and internal “systems” you can copy/paste across teams
• Permissions that are decent for most orgs (but can get tricky at scale)
• AI features (summaries, writing help) that are only as good as your underlying structure

Pricing (high level)

• Free plan available
• Paid tiers commonly start around ~$10–$12/user/month depending on plan and billing

Pros

• Ridiculously flexible—you can model almost any knowledge structure
• Great for cross-functional teams (Product + Ops + Marketing)
• Beautiful writing experience—people actually want to document
• Databases let you build a “knowledge system,” not just pages
• Huge ecosystem of templates and community patterns

Cons

• Governance is on you—without rules, it becomes Notion soup
• Search is good, but trust is the issue: which page is the source of truth?
• Permissions can feel page-by-page fiddly as you grow
• Not purpose-built for customer KB workflows (versioning, staged publishing) the way Document360 is

Who should use it

• Startups and mid-market teams that want one workspace for docs + lightweight planning
• Teams willing to define documentation standards (owners, review dates, canonical pages)

Who should avoid it

• Highly regulated orgs needing strict publishing/version control
• Support orgs that need customer KB analytics and deflection out of the box
• Teams that won’t enforce structure (you’ll drown in “Final_v7_REAL” pages… but prettier)

My opinion: Notion is best when you treat it like a product—with IA, ownership, and a little discipline. If you treat it like a digital whiteboard, it’ll repay you with chaos.

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Confluence - Full Review (300-350 words)

Confluence is the grown-up in the room. Not always the coolest. Definitely the one who shows up on time and actually reads the agenda.

It’s long been the backbone for engineering documentation—especially if your world revolves around Jira. And in 2025, that still holds. The deeper your Atlassian stack goes, the more Confluence makes sense almost by default.

Overview & features

• Structured spaces and page hierarchies that scale
• Tight Jira integration: link epics, embed tickets, connect release notes to work
• Templates for PRDs, retros, runbooks, decision logs
• Permissions and admin controls that are more enterprise-friendly than “freeform” tools
• Solid collaboration and commenting

Pricing (from provided data)

• Free (up to 10 users)
• Standard from ~$5.75/user/month

Pros

• Best-in-class for Jira-centric workflows—documentation connected to delivery
• Space-based organization is great when you need clear boundaries between teams
• Mature admin controls; better for scale and governance
• Lots of institutional momentum—many hires already know it

Cons

• UX can feel heavy compared to Notion/Slab (it’s not “fun,” it’s “reliable”)
• Search can be hit-or-miss depending on how disciplined your spaces are
• Can encourage “documentation as dumping ground” if no one curates it

Best use cases

• Engineering orgs writing technical specs, runbooks, architecture docs
• Product teams that want PRDs tied to Jira tickets
• Larger companies where permissions, spaces, and structure matter

Candid take: Confluence isn’t where creativity thrives. It’s where documentation goes to become official. If you need a system that won’t wobble when you hit 300 pages and 40 teams… Confluence is hard to beat, especially at the price point (and yes, the G2 rating—4.1★ on 3,700 reviews—reflects that it’s more “workhorse” than “beloved”).

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Guru - Full Review (300-350 words)

Guru is the tool I reach for when the problem isn’t “we need a wiki.” It’s “people keep asking the same questions in Slack and nobody trusts the docs.”

Guru’s magic trick is not the editor. It’s distribution and verification. It meets people where they already are—Chrome, Slack, internal tools—and it makes knowledge feel like a living thing rather than a static library.

When I was setting Guru up for a support team, the biggest “oh wow” moment was watching new hires stop asking in Slack after a week. Not because they became experts… but because the answers started appearing before they asked.

Overview & features

• Browser extension that surfaces knowledge contextually
• Slack/MS Teams integrations for in-the-moment answers
• Verification workflows: knowledge owners can review/confirm freshness
• AI-assisted suggestions and capture (varies by setup)
• “Cards” that are optimized for quick consumption, not long essays

Pricing (from provided data)

• From ~$10/user/month

Pros

• Best-in-flow experience—knowledge shows up where work happens
• Verification reduces the “is this outdated?” anxiety (huge)
• Great for Support, Sales, CX, IT helpdesk—any role with repeat questions
• Faster time-to-value than building a perfect wiki taxonomy

Cons

• Not ideal for long-form documentation or complex doc sets
• Can feel like “yet another system” unless you commit to the workflow
• Pricing can add up for large orgs if everyone needs seats

Best use cases

• Teams that live in Slack and browsers and need fast, trusted answers
• Organizations with high ticket volume or heavy enablement needs
• Companies where knowledge must be reviewed and owned, not just written

Opinionated note: Guru is the closest thing I’ve seen to a “knowledge muscle.” Not a knowledge warehouse. If your main pain is repetition and tribal knowledge, Guru’s 4.7★ on G2 (2,100 reviews) makes sense—people feel the impact daily.

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Slab - Full Review (300-350 words)

Slab is what you pick when you want a wiki that feels like a calm room. No flashing lights. No 18 ways to build a database. Just… documentation that’s easy to write, easy to find, and easy to keep tidy.

It reminds me of moving into an apartment with good closets. Suddenly you’re not buying storage bins and arguing about where to put things—you’re just living your life.

Overview & features

• Clean editor built for internal documentation
• Strong search, sensible organization, topics
• Integrations with common tools (Slack, Google Drive, GitHub, etc.)
• Permissions and team spaces without too much complexity
• Lightweight structure that encourages consistency

Pricing (from provided data)

• Free plan available
• Team from ~$8/user/month

Pros

• Fast, low-friction UX—people actually publish docs
• Great search and information architecture for internal knowledge
• Less likely than Notion to become a sprawling everything-app
• Easy onboarding for non-technical teams

Cons

• Less flexible than Notion (no complex databases-as-apps vibe)
• Not purpose-built for public help centers like Document360/Zendesk Guide
• If you need heavy workflow (approvals, versioning), you might outgrow it

Best use cases

• Small to mid-sized companies that want a central internal wiki
• Teams tired of Notion sprawl and Confluence bloat
• Organizations where clarity > customization

My take: Slab’s 4.6★ on G2 (500 reviews) tracks with what I’ve seen—people like it because it doesn’t try to be everything. If you want a “company brain” that stays readable, Slab is a strong bet.

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Document360 - Full Review (300-350 words)

Document360 is what you choose when you’re serious about documentation as a product. Not just internal notes. Not just “here’s a page.” I mean: versioning, categories, access control, staged publishing, and a clean public experience that won’t embarrass you.

It’s purpose-built knowledge base software—and it feels like it. The tradeoff is price and a bit of “this is a system” energy.

Overview & features

• Public and private knowledge bases with strong controls
• Robust versioning and content lifecycle management
• Category and subcategory management that scales
• Separation between drafting and publishing (huge for teams)
• Analytics and content insights (typically a focus in KB tools)

Pricing (from provided data)

• From ~$149/project/month

Pros

• Built for KB governance—versions, categories, structured publishing
• Great for product documentation and customer help centers
• Scales well when you have hundreds/thousands of articles
• Clear separation of roles and permissions

Cons

• Pricing can be a shock if you’re used to per-user tools
• Less of an all-in-one workspace (it’s docs-first, not “run your company here”)
• Internal collaboration can feel less fluid than Notion/Slab for brainstorming

Best use cases

• SaaS companies with serious customer self-service goals
• Teams needing both public and private docs with strong controls
• Documentation teams that care about consistency, structure, and release management

Opinion: Document360’s 4.7★ on G2 (450 reviews) makes sense because it’s doing the unglamorous stuff well. If your docs are part of your product experience, this is one of the most “professional” options on the list.

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Zendesk Guide - Full Review (300-350 words)

Zendesk Guide is the “obvious choice” when you’re already paying for Zendesk. And honestly… that’s not a diss. Sometimes the best tool is the one that’s already connected to your tickets, agents, and reporting.

Guide shines when your goal is ticket deflection: reduce support volume by making it easy for customers to help themselves—and then measure whether that’s actually happening.

Overview & features

• Customer-facing help center tied directly to Zendesk Support
• Knowledge management within the Zendesk ecosystem
• Analytics around article performance and deflection
• Workflows that align with support operations (agents, macros, tickets)

Pricing (from provided data)

• Included with Zendesk Suite
• Zendesk Suite from ~$55/agent/month

Pros

• Deep integration with support workflows—articles connect to tickets naturally
• Deflection analytics are practical, not theoretical
• Lower implementation overhead if you’re already on Zendesk
• Familiar admin model for support teams

Cons

• If you’re not a Zendesk shop, it’s rarely worth adopting Guide alone
• Not ideal for internal knowledge across the whole company
• Customization and IA can feel constrained compared to dedicated doc tools

Best use cases

• Support teams using Zendesk that want an integrated help center
• Organizations prioritizing self-service + measurable deflection
• Companies that want to keep tooling minimal in Support

My take: Zendesk Guide is a strong “stay inside the ecosystem” move. The 4.2★ on G2 (900 reviews) feels right—people like it when they need it, but it’s not the tool you pick for fun or flexibility.

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Head-to-Head Comparison (300-400 words)

Here’s the messy truth: these tools aren’t fighting the same war. They overlap, sure, but they’re optimized for different pain.

Ease of use

• Easiest to adopt fast: Slab and Notion
• Easiest to adopt correctly: Slab (because it limits chaos)
• Steepest “system” feel: Confluence and Document360
• Least “new UI to learn” in practice: Guru, because it lives in your browser/Slack

Features & workflows

• Best internal wiki foundations: Slab, Confluence
• Best for docs + lightweight ops/project structure: Notion
• Best for verification and keeping answers fresh: Guru (this is its whole personality)
• Best for customer-facing KB governance: Document360, Zendesk Guide
• Best for support ticket deflection workflows: Zendesk Guide (no contest)

Pricing value (roughly)

• Best entry price: Confluence (free up to 10) and Slab (free)
• Best “bang for the org” if everyone needs docs + light systems: Notion
• Most expensive on paper: Document360 and Zendesk Suite (but they’re solving different problems—public KB and support platform economics)

Integrations

• Atlassian-native: Confluence
• Support-native: Zendesk Guide
• Daily-tool embedding: Guru (Slack/Chrome)
• General ecosystem: Notion/Slab (broad but not always deep)

Learning curve & long-term sanity

If you’ve ever opened a workspace and thought, “Where do I even start?”—yeah. That’s Notion risk. Confluence can feel rigid, but the rigidity is a guardrail. Slab is the minimalist friend who won’t let you buy a 12-foot couch for a small apartment. Guru is the friend who keeps sticky notes on your fridge so you stop forgetting the basics.

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How to Choose: Decision Framework (200-300 words)

Ask these questions before you fall in love with a demo:

1. Is this internal knowledge, customer-facing docs, or both?
   If it’s customer-facing and high-stakes, lean Document360 or Zendesk Guide. Internal-only? Slab/Notion/Confluence/Guru.

2. Do you need “trusted answers” or “a library”?
   If people don’t trust docs, you need verification and ownership—hello, Guru (or a disciplined Confluence/Slab setup, but that takes more policing).

3. What’s your system of record for work?
   Jira-heavy? Confluence gets a huge boost. Zendesk-heavy? Guide is the path of least resistance.

4. Will your team enforce structure?
   If the answer is “uh… maybe,” pick a tool that enforces it gently (Slab, Confluence) instead of one that lets everyone freestyle (Notion).

5. Who owns documentation?
   If nobody owns it, the tool won’t matter. (Sorry. It’s true.)

Red flags during trials

• Search feels good… but you can’t tell what’s current
• Permissions are confusing and nobody can explain them
• Publishing workflow is “copy/paste and hope”
• You’re relying on AI to summarize chaos instead of fixing the chaos

What to test: create 30–50 real docs, run onboarding with a new hire, and measure how many Slack questions drop. That’s the only metric that doesn’t lie.

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The Verdict: Final Recommendations (400-500 words)

Alright—here’s how I’d rank these in 2025, assuming you’re choosing with your future self in mind (the one who has to maintain this thing).

1) Notion — Best overall for most modern teams

If you want one place where docs actually get written—and you also want light structure for projects, onboarding, meeting notes, and knowledge hubs—Notion is still the most versatile. It’s the tool people open voluntarily. That matters.

Action item: If you choose Notion, don’t wing it. Create a documentation homepage, define doc owners, add review dates, and set a rule for “canonical” pages. Without that, you’ll build a beautiful maze.

2) Confluence — Best for engineering-led orgs (especially Jira shops)

Confluence isn’t trendy. It’s dependable. If you’re already in Atlassian, it becomes the obvious backbone for specs, runbooks, and decision logs tied to Jira work. And the price is hard to argue with—Free up to 10 users; Standard ~ $5.75/user/mo.

Action item: Invest in space architecture early. If you let every team create a space with no conventions, search becomes a scavenger hunt.

3) Guru — Best for “stop asking me this” knowledge

If your pain is repeated questions in Slack, inconsistent answers to customers, or onboarding that depends on who’s online… Guru is the most direct fix. The browser extension + verification workflow is the real win. It’s not trying to be your wiki. It’s trying to be your memory.

Action item: Start with one team (Support or Sales), define knowledge owners, and measure time-to-answer and Slack interruptions.

4) Slab — Best for small teams that want a clean internal wiki

Slab is what I recommend when teams say, “We don’t want a second operating system. We just want a wiki that works.” It’s clean, fast, and hard to mess up (honestly, this surprised me the first time I used it—everything just felt… calm).

Action item: Use Slab as the single internal knowledge hub, and link out to tools like Google Drive rather than duplicating everything.

5) Document360 — Best for serious product/customer documentation

If docs are customer-facing, brand-adjacent, and complex—Document360 is a strong pick. The pricing (~$149/project/mo) makes sense when documentation is a product function, not a side quest.

Action item: Treat it like a docs platform: define taxonomy, publishing workflow, and versioning policy from day one.

6) Zendesk Guide — Best when Zendesk is already your support platform

If you’re on Zendesk Suite, Guide is a pragmatic choice. It’s not the fanciest KB tool, but the integration and deflection analytics are valuable—especially when leadership asks, “Is self-service actually working?”

Action item: Connect articles to ticket categories and track deflection by topic. Otherwise you’ll publish content and never know if it helped.

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Conclusion

In 2025, documentation isn’t a side project—it’s infrastructure. Pick the tool that matches your real problem: flexibility (Notion), engineering scale (Confluence), trusted in-flow answers (Guru), clean internal wiki (Slab), serious customer docs (Document360), or support deflection inside Zendesk (Guide).

If you tell me your team size, whether docs are internal vs customer-facing, and what you’re already using (Jira? Zendesk? Slack-heavy?), I’ll narrow this down to the top two—and give you a rollout plan that won’t implode in month three.