Review (August 2025)

Free ssl certificates issued instantly online, supporting acme clients, ssl monitoring, quick validation and automated ssl renewal via zerossl bot or rest api.

1.45M

Estimated Revenue

283.62k

Website Visitors

2.1/5

Trustpilot Score

What do we know about ZeroSSL?

Estimated Revenue (2020)

$1.45M

Total Employees

10

Industry

Internet

About

ZeroSSL: Free SSL certificates issued instantly online, supporting ACME clients, SSL monitoring, quick validation and automated SSL renewal via ZeroSSL Bot or REST API.

Social Links

Alexa Ranking: 12937

What is ZeroSSL's Revenue?

ZeroSSL's estimated revenue for 2024 is $1.45M.

What does ZeroSSL do?

What are the monthly traffic metrics for Zerossl?

6/mo Traffic Growth

-11.50%

All Time Traffic Growth

Create Free Account

Monthly Hits

284k

Time on Site

6.0Mins

Bounce Rate

33%

How fast is Zerossl growing?

Zerossl has grown by 12.8% in the last 6 months according to SimilarWeb.

How do people interact with Zerossl?

Last month, Zerossl received 284k visitors who spent an average of 6.0 minutes on the website and visited 6.0 different pages per session. Overall, 33% of people bounce on the first visit.

How do people find Zerossl?

129.4k people (46%) visit Zerossl directly. 104.5k (37%) people search for them in Google. Whereas, 2.5k (1%) discover Zerossl through Facebook, Reddit, and YouTube. 7.1k (2%) visitors come from Zerossl's email newsletters. Finally, 271.7 (0.1%) people come from affiliates and or paid referrals.

Who uses Zerossl?

Zerossl's top market is the United States and they receive 28.8k (10.1%) people.
Then the 2nd is India with 27.1k (9.5%).
The 3rd is is China with 25.5k (9.0%).

Traffic Growth (last 6 months)

All Traffic Source

Country Share

Traffic Growth (last 12 months)

See 12/mo Traffic Stats

What are Zerossl's ads on Google?

Google Ads

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Purchase SSL Certificate - Easy Validation & Installation

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What do Zerossl's customers say about them?

Review Score

2.1/5

Total Reviews

13

Info

ZeroSSL
5 Star
0.0%
4 Star
8.3%
3 Star
0.0%
2 Star
0.0%
1 Star
91.7%
Read reviews that mention
Nick Redding

You don't need to pay them ...

Reviewed on 2021-05-12T14:30:30

If you are willing to go through the motions to generate a new certificate every 90 days you might as well save the $10/month and just use github/crypt-le.Zerossl is a bait-and-switch operation, all the review sites claiming it offers free 90-day certificates are wrong or outdated.
read more
Frederic Meyer

Don't use this service

Reviewed on 2021-05-12T08:44:57

If you pay for this you're getting scammed. Used to use this service when it was actually free and basically a LetsEncrypt frontend.Now they charge a overpriced monthly subscription fee after a trial period. Pathetic. I now just use LetsEncrypt with Certbot (certbot . eff . org) on the command line to get free certificates.
read more
Sonicrider

This used to be SSLforFree

Reviewed on 2021-05-03T11:04:03

This used to be SSLforFree and this migrated to ZeroSSL, it used to be free forever for 90 days certificates,but since the migration, you will be charged after 3x 90 days with a minimum $10 per month. The support is unprofessional, you don't get an answer on your questions properly, as they know their charge is out of proportion. You can get these services elsewhere for $10- $20 a year, and that is then for yearly based certificates. Of cause it could be that ZeroSSL made a mistake programming their website and accidentally calling it "100% Free for Ever", it still shows it there, but leaving it that way it is misleading, better call it "TRIAL period for 3x 90 days". With one single domain name registered they make you start paying after 3x 90 days, when the BASIC program stops
read more
Lambik

Not a free service

Reviewed on 2021-03-26T17:01:36

This service is far from free. I did have this basic service for 1 certificate, but indeed after 2x renew ,I suddenly had to upgrade and had to start paying. ZeroSSL are not clear with their policies.
read more
Amanda

Easy to use and fair with price

Reviewed on 2021-03-25T10:19:03

It was easy to issue my 90-day certificates with ZeroSSL and installation was very quick. Advice forimprovement: I am getting emails for already renewed certificates which is annoying and I hope this will be fixed soon.
read more
Sebastian Kumor

Not free anymore

Reviewed on 2021-03-08T17:55:22

The website used to count only active certificates in the free tier and now it also counts the expired ones so you have to pay if you wanna review.Would not recommend using.
read more
Etienne Wettingfeld

Free Plan is actually a trail

Reviewed on 2021-03-07T19:25:16

The free plan allows a maximum of 5 30-day certs, but once you renew one you'll end up with a new one and an expired one (which you can't remove),both count towards the 5 max. It all works pretty will, which would warrant 4 or 5 starts, but stating something is free when it's really a trail it's not honest and therefor 1 star.
read more
Jax

Dodgy and untrustworthy

Reviewed on 2021-01-06T03:39:21

Pretty dodgy company - if you subscribe and then cancel your subscription, it will revoke all of your certificates.Only a free trial for actual free certificates. Actually subscribed and paid and then cancelled without ever using it because of how dishonest and untrustworthy it is. ("Any certificates that exceed the subscription plan you are downgrading to will be revoked automatically")
read more

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