Onyx AI vs Notion

Onyx AI lands on Depends, and Notion lands on Worth it.

Onyx AI

onyx.app

Analyzed September 19, 2026

Depends

Confidence: Medium

Buy it if your team is docs-heavy, has an engineer to self-host, patch CVEs, and wants Glean-class search free.

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Notion

notion.so

Analyzed September 15, 2026

Worth it

Confidence: High

Notion is a mature, widely adopted all-in-one workspace with a 4.6/5 rating across 13,836 G2 reviews, a free tier, and strong docs/wiki/project capabilities, making it a solid buy for most teams.

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Onyx AI versus Notion
Compare	Onyx AI	Notion
Verdict	Depends	Worth it
Best for	Docs-heavy scaling teams	Teams wanting docs, wikis, and project management consolidated in one flexible workspace
Who it's not for	Small teams . Notion or Slack search suffices	Teams whose workflows depend on heavy automation . reviewers consistently describe Notion as 'brilliant for docs and wikis, frustrating for automation'
Privacy	Multiple 2026 CVEs including critical OAuth token exposure; don't conflate with unrelated vendor Onyx Security.¹¹	Notion publishes SOC 2 certification, infrastructure security details, and AI data-handling practices, and issues security updates.
Public sentiment	Self-hosters on Reddit praise it as a private team ChatGPT with RAG and web access; SoftwareFinder users rate ease of use 10/10.^⁵	Sentiment is broadly positive at scale: a 4.6/5 G2 rating across 13,836 reviews with consistent praise for flexibility, customization, and organization, and G2 reviewers report Notion excels in overall user satisfaction.¹⁶
Biggest gotcha	Open-source self-host: upgrades and security patching are on you . CVE history shows why that matters	Pricing is seat-based with four tiers, and guides warn of hidden limits on plans . audit per-seat costs across your whole team before committing

Pick Onyx AI when

Docs-heavy scaling teams
Self-hosting engineers wanting private AI search
Orgs wanting Glean-class search without Glean pricing
Open-source shops

When Onyx AI is not a fit

Small teams . Notion or Slack search suffices
Teams with no engineer to run and patch it
Buyers wanting zero-admin turnkey SaaS
Anyone connecting sensitive data before fixing the OAuth CVE

Pick Notion when

Teams wanting docs, wikis, and project management consolidated in one flexible workspace (thebusinessdive.com/notion-review)
Organizations that value deep customization and knowledge management . Notion is a G2 Leader in Knowledge Management, AI Software, and Project Management (g2.com/sellers/notion-2026-07-28)
Teams adopting AI-assisted work . Notion has moved far beyond a notes app and is increasingly used as an AI workspace (gend.co/blog/notion-g2-best-software-awards-2026)
Buyers on a budget who want to start free and scale into paid seats (lifestack.ai/blog/notion-pricing)

When Notion is not a fit

Teams whose workflows depend on heavy automation . reviewers consistently describe Notion as 'brilliant for docs and wikis, frustrating for automation' (eesel.ai/blog/notion-review)
Organizations that need native email-client and other deep integrations out of the box . missing native connections are the most frequently cited criticism (seatable.com/notion-experiences)
Users who need fast, frictionless note capture . Reddit users report slow quick-access to notes and a real learning curve ('most non user friendly and annoying app' per one reviewer) (reddit.com/r/productivity/comments/1odlc3g/does_anyone_actually_use_notion)
Enterprises needing transparent upfront pricing . the top tier requires contacting sales and you should 'expect it to be significant' (knowledgebase.net/software/notion-review)

Sources

Onyx AI official siteonyx.app
official
Onyx AI Pricingonyx.app
official
Onyx AI Review 2026: Open-Source Search Tested . Teamazingteamazing.com
review
Top Onyx AI alternatives for enterprise knowledge search . Dustdust.tt
review
Introducing Onyx . r/selfhostedreddit.com
review
Introducing Onyx . r/LocalLLaMAreddit.com
review
Onyx AI: Pricing, Demo & Features . SoftwareFindersoftwarefinder.com
review
Onyx AI Reviews . SoftwareFindersoftwarefinder.com
review
Onyx AI Reviews and Pricing . f6sf6s.com
review
Ramp case studyonyx.app
official
CVE-2026-71424 OAuth token exposurethehackerwire.com
security
CVE-2026-63178 auth bypasssentinelone.com
security
CVE-2026-42276 auth bypasssentinelone.com
security
Onyx raises $10Mprospeo.io
news
Top 10 Onyx AI Alternatives . G2g2.com
review
Notion has a 4.6-star rating on G2, praised for customizationg2.com
review