ObsidianSharpen your thinking. The free and flexible app for your private thoughts.

SlabBuild a culture of knowledge-sharing today.

Comparison · Knowledge Management · weekly run Nov 3

Obsidian vs Slab

Which one do AI engines recommend, and how do they differ on price, fit and features?

The short answer

Slab is the stronger AI pick in Knowledge Management: it has a visibility score of 13.6 versus 5.2 for Obsidian, and ranks ahead in 50% of the answers that name both.

Choose Obsidian if…

You want a lower entry price ($4 vs $6.67)
AI answers describe it more positively (50% vs 45% positive)
Strong for personal knowledge management
Maximum ownership of your files

Choose Slab if…

You want the brand AI engines rank higher (13.6 vs 5.2)
You need SOC 2 Type 2 or SOC 3 or GDPR coverage
You prefer a larger, established vendor (11–50 employees)
Clean interface and unified search across tools

AI visibility side by side

Latest weekly run · Nov 3

Metric	Obsidian	Slab
Visibility score	5.2%	13.6%
Change vs last week	New	New
Rank in Knowledge Management	#17	#9
Share of voice	1.1%	3.5%
Mentions this run	6	20
Positive in AI answers	50%	45%

The stronger value in each row is marked with a ✓.

Visibility score trend

Weekly runs over the last 60 days

Obsidian 0pp · Slab 0pp over 0 weekly runs.

Engine by engine

Slab leads on 3 of 3 engines

ChatGPT

8.2%

16.7%

AI Mode

3.1%

5.2%

Perplexity

4.3%

19.1%

ObsidianSlab

Head to head in AI answers

2 engine answers name both brands

1Obsidian ranked higher

1Slab ranked higher

Prompt	Engine	Obsidian	Slab
Alternatives to the most popular knowledge management tool	Perplexity	#7	#5
Most affordable knowledge management tool that is still reliable	Perplexity	#2	#3

Features, pricing & fit

Dimension	Obsidian	Slab
Pricing model	Per seat	Per seat
Entry price	Free; paid from $4 per seat / mo	Free; paid from $6.67 per seat / mo
Free plan	Yes	Yes
Deployment	Local desktop and mobile apps, with optional cloud Sync and Publish add-ons	Cloud-hosted on Google Cloud Platform
Compliance	—	SOC 2 Type 2, SOC 3, GDPR
Support	Discord community, Discussion forum, Help site, Priority support with paid Sync and Publish plans	Help Center, Contact support, Email, Chat
Founded	2020	2016
Headquarters	Toronto, Ontario, Canada	San Francisco, California
Employees	1–10	11–50
Funding	Bootstrapped	Undisclosed round (unverified) · $2M raised
Best for	Individuals and small teams who want private notes stored locally as plain text files they can keep long term	Non-technical and tech-savvy teams that want to share company knowledge in one place.