Top 10 s21.es Competitors

The Top 10 Sites Like s21.es in June 2026 are ranked by their affinity to s21.es in terms of keyword traffic, audience targeting, and market overlap

#1

serior.com

Biblioteca de normativa contra incendios en España: CTE DB-SI, RIPCI (RD 513/2017), RSCIEI (RD 164/2025) y novedades. Guías por edificio, industria, equipos y transporte.

Company

- -

Industry

- -

Global Rank

#1,624,766

609,935

Country Rank

#89,211

52,735

Spain

Category Rank

#1,562

971

Government
(In Spain)

Bounce Rate

45.51%

Pages per Visit

2.00

Avg Visit Duration

00:00:53

Similarity Score

100%

Compare serior.comCompare to serior.com

#2

ceat.org.es

confederación española de autónomos

Company

- -

Industry

- -

Global Rank

- -

Country Rank

- -

Category Rank

- -

Bounce Rate

- -

Pages per Visit

- -

Avg Visit Duration

- -

Similarity Score

91%

Compare ceat.org.esCompare to ceat.org.es

s21.es's top 5 competitors in June 2026 are: serior.com, ceat.org.es, , , and more.

According to Similarweb data of monthly visits, s21.es’s top competitor in June 2026 is serior.com. s21.es 2nd most similar site is ceat.org.es, and closing off the top 3 is .

ranks as the 4th most similar website to s21.es and ranks fifth in June 2026.

The other five competitors in the top 10 list are , , , , and .