How many companies use HTTP/3 vs Zen Planner?

1,520,619 companies use HTTP/3 and 76 companies use Zen Planner in our database. HTTP/3 is more widely adopted with 20008.1x more companies than Zen Planner.

Can I get a list of companies using both HTTP/3 and Zen Planner?

Yes. AgentData tracks companies using both tools. Sign up free to access the full list with emails, tech stacks, and contacts via CSV or API.

HTTP/3 vs Zen Planner

HTTP/3 is used by 1,520,619companies — 20008.1x more than Zen Planner (76).

1,520,619 use HTTP/376 use Zen Planner

Side-by-side comparison

	HTTP/3	Zen Planner
Companies	1,520,619	76
Category	Miscellaneous	Appointment scheduling

Company adoption

Top companies using Zen Planner

Tutaj Brazilian Jiu Jitsututajbjj.com

Martial Artstrainkrav.com

Training Room Onlinetrainingroomonline.com

Train 8NINEtrain8nine.com

Diamondheartteamdiamondheart.com

Get the full comparison

1,520,695 companies with emails, tech stacks, and contacts

Start free →

1,000 lookups · API access · CSV exports

API access

GET /api/v1/tech?name=http-3

From the makers of AgentData

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

HSTS vs HTTP/3Compare →HSTS vs Zen PlannerCompare →Google Analytics vs HTTP/3Compare →Google Analytics vs Zen PlannerCompare →HTTP/3 vs jQueryCompare →jQuery vs Zen PlannerCompare →

View individually

Companies using HTTP/3→

Companies using Zen Planner→

Frequently asked questions

Need this data via API?

Access technology comparison data programmatically via REST API or MCP.

API docs →