FullStory vs PostHog

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

The short answer

PostHog is the stronger AI pick in Product Analytics: it has a visibility score of 56.6 versus 9.1 for FullStory, and ranks ahead in 78% of the answers that name both.

Choose FullStory if…

You need SOC 2 Type II or SOC 3 or ISO 27001 or ISO 27017 or ISO 27018 or ISO 27701 or ISO 42001 coverage
You prefer a larger, established vendor (501–1,000 employees)
Flat tiers pricing suits your budget better than usage-based
session replay and UX friction analysis

Choose PostHog if…

You want the brand AI engines rank higher (56.6 vs 9.1)
AI answers describe it more positively (57% vs 19% positive)
You need a self-hosted or on-premises option
You need SOC 2 Type 2 or GDPR or HIPAA coverage

AI visibility side by side

Latest weekly run · Nov 3

Metric	FullStory	PostHog
Visibility score	9.1%	56.6%
Change vs last week	up+0.1%	up+1.2%
Rank in Product Analytics	#9	#3
Share of voice	3.8%	14.1%
Mentions this run	19	66
Positive in AI answers	19%	57%

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

Visibility score trend

Weekly runs over the last 60 days

FullStory +0.1999999999999993pp · PostHog +1.2000000000000028pp over 1 weekly runs.

Engine by engine

PostHog leads on 3 of 3 engines

ChatGPT

7.8%

68%

AI Mode

5.4%

45.7%

Perplexity

14.1%

56.1%

FullStoryPostHog

Head to head in AI answers

18 engine answers name both brands

4FullStory ranked higher

14PostHog ranked higher

Prompt	Engine	FullStory	PostHog
What is a product analytics tool and when does a company need one?	Perplexity	#2	#6
How do I choose a product analytics tool for a mid-market team?	AI Mode	#3	#6
How do I choose a product analytics tool for a mid-market team?	Perplexity	#5	#3
What should a product analytics tool integrate with?	ChatGPT	#2	#8
What are the best Product Analytics tools in 2026?	ChatGPT	#13	#3
What are the best Product Analytics tools in 2026?	Perplexity	#7	#3
Top product analytics tool options for B2B SaaS companies	ChatGPT	#8	#3
Top product analytics tool options for B2B SaaS companies	Perplexity	#8	#4
Best product analytics tool for enterprise	AI Mode	#7	#8
Best product analytics tool for enterprise	Perplexity	#6	#3
Compare the leading Product Analytics platforms	ChatGPT	#9	#3
Compare the leading Product Analytics platforms	Perplexity	#6	#4

Features, pricing & fit

Dimension	FullStory	PostHog
Pricing model	Flat tiers	Usage-based
Entry price	Contact sales	Contact sales
Free plan	Yes	Yes
Deployment	—	PostHog Cloud in US or EU regions, or self-hosted
Integrations	—	926+
Compliance	SOC 2 Type II, SOC 3, ISO 27001, ISO 27017, ISO 27018, ISO 27701, ISO 42001	SOC 2 Type 2, GDPR, HIPAA
Support	Onboarding with Fullstory specialists, Professional services: Insights+ consulting and Data+ configuration, Advantage Subscription expert guidance	Community support on the free plan, Email support on pay-as-you-go, Slack support for plans over $2k/mo, Paid onboarding call
Founded	2014	2020
Headquarters	Atlanta, GA, United States	San Francisco, CA, United States
Employees	501–1,000	201–500
Funding	Series C (one source: $32M led by Stripes)	Series E
Best for	Product, UX, and growth teams	Product engineers, product managers, growth engineers and founders who want analytics, session replay, flags and experiments in one platform.