K
klaviyo
vs
S
Substack

klaviyo vs Substack

klaviyo is used by 543companies — 9.7x more than Substack (56).

543 use klaviyo56 use Substack955 emails available

Side-by-side comparison

klaviyoSubstack
Companies54356
Categoryemail_marketingBlogs
Emails available90253

Company adoption

klaviyo543Substack56

Top industries

klaviyo

E-commerce & Retail260
Healthcare & Life Sciences21
Other15
Hospitality & Travel12
Education & Learning10

Substack

Media & Content52
Developer Tools & Infrastructure2
Other1
Professional Services1

Top companies using klaviyo

Rao's Specialty Foodsraos.comOktoberfestwinkeloktoberfestwinkel.nlmayday.healthmaydayhealth-shop.fourthwall.comSC TOP PLAST SRLtop-plast.roThe Op Games | Board Games, Puzzles, Dice and More!usaopoly.com

Top companies using Substack

Freelancing Females Newsletterfreelancingfemales.substack.comEngineering Togetheradamferrari.substack.comSecuring Laravellarasec.substack.comHassan’s Substacknutlope.substack.comHorace & friendsvamoul.substack.com

Get the full comparison

599 companies with emails, tech stacks, and contacts

Start free →

1,000 lookups · API access · CSV exports

API access

GET /api/v1/tech?name=klaviyo

AgentData picks

DragApp

AI-powered shared inbox, help desk, and team collaboration — inside Gmail. 200K+ users.

Try DragApp free →

HeyHelp

AI email assistant inside Gmail. Drafts, sorts, follows up.

Try HeyHelp free →

Oneway

All-in-one customer platform — live chat, email, automations, changelogs & roadmaps with AI.

Try Oneway →

Related comparisons

Google Analytics vs klaviyoCompare →Google Analytics vs SubstackCompare →Cloudflare vs klaviyoCompare →Cloudflare vs SubstackCompare →HSTS vs klaviyoCompare →HSTS vs SubstackCompare →

View individually

K
klaviyo
Companies using klaviyo→
S
Substack
Companies using Substack→

Frequently asked questions

Need this data via API?

Access technology comparison data programmatically via REST API or MCP.

API docs →