Glean vs Zendesk

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

The short answer

Glean is the stronger AI pick in Knowledge Management: it has a visibility score of 16.2 versus 9.4 for Zendesk, and ranks ahead in 60% of the answers that name both.

Choose Glean if…

You want the brand AI engines rank higher (16.2 vs 9.4)
AI answers describe it more positively (56% vs 34% positive)
You need ISO 42001 or HIPAA or TX-RAMP Level 2 or ISO 27001 or GDPR coverage
Enterprise search across many connected apps

Choose Zendesk if…

You need more native integrations (1800+ vs 250+)
You need ISO 27001:2022 or ISO 27018:2019 or ISO 27701:2019 or ISO 27017:2015 or ISO 42001:2023 or FedRAMP LI-SaaS or Cyber Essentials Plus coverage
You prefer a larger, established vendor (5,000+ employees)
Industry leader in omnichannel customer support

AI visibility side by side

Latest weekly run · Nov 3

Metric	Glean	Zendesk
Visibility score	16.2%	9.4%
Change vs last week	New	New
Rank in Knowledge Management	#6	#11
Share of voice	4.1%	3.7%
Mentions this run	22	20
Positive in AI answers	56%	34%

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

Visibility score trend

Weekly runs over the last 60 days

Glean 0pp · Zendesk 0pp over 0 weekly runs.

Engine by engine

Glean leads on 2 of 3 engines

ChatGPT

18%

5.6%

AI Mode

16.7%

8.7%

Perplexity

13.9%

14.1%

GleanZendesk

Head to head in AI answers

10 engine answers name both brands

6Glean ranked higher

4Zendesk ranked higher

Prompt	Engine	Glean	Zendesk
How do I choose a knowledge management tool for a mid-market team?	AI Mode	#5	#3
How do I choose a knowledge management tool for a mid-market team?	Perplexity	#6	#8
What should a knowledge management tool integrate with?	AI Mode	#6	#3
What are the best Knowledge Management tools in 2026?	ChatGPT	#3	#12
What are the best Knowledge Management tools in 2026?	Perplexity	#4	#7
Top knowledge management tool options for B2B SaaS companies	Perplexity	#7	#5
Compare the leading Knowledge Management platforms	ChatGPT	#4	#9
Which Knowledge Management vendors do analysts recommend?	ChatGPT	#5	#10
Which Knowledge Management vendors do analysts recommend?	Perplexity	#9	#7
Official website of the top knowledge management tool vendors	ChatGPT	#5	#8

Features, pricing & fit

Dimension	Glean	Zendesk
Pricing model	—	Per seat
Entry price	—	$19 per seat / mo
Free plan	—	No
Deployment	Per-customer search model stored in the customer's VPC	Cloud (SaaS)
Integrations	250+	1800+
Compliance	ISO 42001, HIPAA, TX-RAMP Level 2, SOC 2 Type II, ISO 27001, GDPR	SOC 2 Type II, ISO 27001:2022, ISO 27018:2019, ISO 27701:2019, ISO 27017:2015, ISO 42001:2023, FedRAMP LI-SaaS, Cyber Essentials Plus
Support	Help Center	Help Center, Community, Partners
Founded	2019	2007
Headquarters	San Francisco, CA	San Francisco, California, United States
Employees	501–1,000	5,000+
Funding	Seed or early-stage round (emerged from stealth) · $765M raised	Take-private (Hellman & Friedman, Permira)
Best for	Large enterprises that want AI answers and agents grounded in their own permission-aware company data	Support teams from startups to enterprises that need omnichannel ticketing with AI automation