What is the best alternative to IIS?

Based on company usage data, Nginx is the most widely adopted alternative, detected on 122,067 websites.

How many companies use IIS?

AgentData detects IIS on 10,372 company websites as of September 2026.

Are companies switching away from IIS?

AgentData tracks technology changes across company websites. Check back for switching trends as we detect more changes.

IIS alternatives

Ranked by real company usage

The most popular alternatives to IIS based on AgentData's analysis of 10,372 company websites are Nginx (122,067 companies), Apache HTTP Server (105,913 companies), LiteSpeed (34,483 companies).

IIS: 10,372 companiesCategory: Web servers15 alternatives found

Top alternatives to IIS

122,067 companies

105,913 companies

34,483 companies

6,538 companies

1,780 companies

893 companies

661 companies

624 companies

446 companies

#10

409 companies

#11

377 companies

#12

268 companies

#13

Apache Traffic Server

228 companies

#14

191 companies

#15

137 companies

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10,372 companies with emails, tech stacks, and contacts

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1,000 lookups · API access · CSV exports

API access

GET /api/v1/tech?name=iis

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Compare

IIS vs NginxCompare →IIS vs Apache HTTP ServerCompare →IIS vs LiteSpeedCompare →IIS vs OpenRestyCompare →

Companies using IIS→

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