Website reputation report

koalendar.com

Last checked 2 days ago · Point-in-time assessment

● Evidence is limited

What is this website?

koalendar.com is currently classified in the Software category based on observed public pages. An About page was also found. The sampled pages were marked as English-language. Recurring page-metadata topics include software, scheduling, scheduling software.

No listed local patterns observedHomepage-only analysis is not a malware clearance. Read the scope and findings below.

73/100Safety Score
75%Evidence Confidence
Trust Radar evidence profile Eight evidence dimensions from zero to one hundred. Exact values surround the chart. Threat Intelligence55 Domain History83 Infrastructure92 Website Security95 Security Hygiene50 Transparency59 Reputation50 Operational Stability96
Trust RadarEight observed factors. Select one to inspect its evidence.

How to read this report

Safety Score evaluates observed signals. Evidence Confidence measures how complete, direct, fresh, and consistent those signals are.

No automated scan can guarantee that a website is safe.

Independent evidence brief

What we observed about koalendar.com

Updated Sep 30, 2026

The latest scan examined 10 public pages on koalendar.com. Website descriptions below come from the site itself. Registration, connection and threat findings were checked separately.

Purpose and visible content

On its About page, the site says: Learn about Koalendar, a bootstrapped scheduling platform used by thousands of teams worldwide to manage appointments, reduce no-shows, and simplify booking across calendars and…

Registrar and domain history

Registered on Jun 17, 2020. Registrar: Porkbun LLC.

Recorded expiry date: Jun 17, 2027. Registry data can change.

Connection and hosting evidence

The checked homepage returned HTTP 200.

A valid TLS certificate was observed, expiring Dec 13, 2026.

Threat checks and score context

External malware-provider coverage was unavailable. The report does not treat this missing check as a clean result.

Safety Score: 73/100. Evidence Confidence: 75%. These measure different things.

Public content profile

Pages reviewed on koalendar.com

10 of up to 10 pages

We sampled public pages from this website to understand its subject and contact paths. The titles and short descriptions below come from the website itself. They are not endorsements or independent safety findings.

Free Appointment Scheduling Software | KoalendarSimplify scheduling with Koalendar. Free forever plan with unlimited meetings, booking pages, and calendar sync—ideal for teachers, coaches, teams, and small businesses. About Koalendar | Scheduling Software Built for Teams & ProfessionalsLearn about Koalendar, a bootstrapped scheduling platform used by thousands of teams worldwide to manage appointments, reduce no-shows, and simplify booking across calendars and lo Sales Scheduling Software for Faster Deals | KoalendarSales scheduling software that turns interest into booked calls. Prospects pick a time from one link and get instant confirmation. Free forever plan. Customer Service Scheduling Software | KoalendarDiscover the easiest customer service scheduling software for support teams. Automate bookings, assign staff, and deliver better customer experiences with less back-and-forth. Free Interview Scheduling Software for Recruiters & Candidates | KoalendarInterview scheduling software that lets candidates book their own slots. Calendars stay in sync, reminders go out automatically. Free forever plan. Free Website Builder for Appointment Booking | KoalendarCreate a beautiful free booking website that works on any device and in 40+ languages. Let clients around the world book appointments with ease. Calendar Sync Software | KoalendarSync Google, Outlook, and iCloud calendars in real time. Koalendar centralizes availability across multiple calendars to prevent conflicts and simplify scheduling. Schedule Meetings Online (Zoom, Google Meet, Teams) | KoalendarSchedule meetings online with automatic Zoom, Google Meet, or Teams links. Sync calendars, prevent double bookings, and send confirmations—free. Booking Payment System | Get Paid for Appointments with KoalendarCollect payments as clients book. Koalendar's online booking and payment system helps you secure revenue upfront, reduce cancellations, and simplify client check-ins. Appointment Reminder Software | Automate Messages with KoalendarAppointment Reminder Software | Automate Messages with Koalendar

Public page evidence

Topics and keywords observed on koalendar.com

12 phrases

These phrases were extracted locally from sampled public page metadata. They are observations, not search-volume or ranking estimates.

softwareTitle, H1, Meta description7 sampled pages
schedulingTitle, H1, Meta description6 sampled pages
scheduling softwareTitle, H1, Meta description5 sampled pages
freeTitle, Meta description6 sampled pages
teamsTitle, H1, Meta description5 sampled pages
appointmentTitle, H1, Meta description4 sampled pages
bookingTitle, H1, Meta description4 sampled pages
syncTitle, H1, Meta description4 sampled pages
appointmentsTitle, H1, Meta description4 sampled pages
free forever planMeta description3 sampled pages
calendarTitle, H1, Meta description3 sampled pages
calendarsMeta description4 sampled pages

At a glance

Key findings

✓

Report is current

The displayed evidence comes from the published immutable scan.

i

Confidence is separate

Unavailable evidence is shown as missing and never counted as clean.

!

Verify before sensitive actions

Check the exact URL and context before payments, credentials, or downloads.

Fully explainable

Why this score?

Versioned weights
Threat IntelligenceWeight 25%
55/100

Threat providers were unavailable. The neutral uncertainty baseline is not a clean verdict.

Domain HistoryWeight 10%
83/100

Domain registration age and expiry were checked.

InfrastructureWeight 10%
92/100

Observed DNS records and network address were checked.

Website SecurityWeight 15%
95/100

Observed certificate validity and TLS protocol were checked.

Security HygieneWeight 15%
50/100

Observed security header values were checked for basic protective settings. Empty values, disabled HSTS and unrecognized values receive no credit. This is not a complete browser-policy validation.

TransparencyWeight 5%
59/100

Observed site metadata and About page were checked. Publisher-supplied details are not independently verified.

ReputationWeight 5%
50/100

Popularity is weak context, not proof of safety. Unranked sites use a neutral baseline.

Operational StabilityWeight 15%
96/100

Observed HTTP status and final connection scheme were checked.

Server-side analysis

Automated security checks

Local antivirus and phishing checks

ClamAV · homepage HTMLNo signature match in the sampled HTML
Engine version1.5.4
Signature database date (UTC)2026-09-30T06:24:18+00:00
HTML bytes submitted313,459
Phishing.Database · exact hostnameNot listed in this snapshot
Feed downloaded (UTC)2026-09-30T06:00:08+00:00
Hosts in local snapshot386,017

Sampled scripts and pages

Resource analysis incomplete

6 resources checked · 6 script links observed on the homepage. Partial resource coverage.

ClamAV inspects the fetched homepage HTML on our server. New scans also sample up to four linked scripts and two collected internal pages, with size and time limits. Scripts are not executed. Other downloads, private server files and logged-in pages remain outside this check. A signature match needs investigation and can be a false positive. No match is not a whole-site safety guarantee.

Exact hostname lookup uses a downloaded Phishing.Database snapshot. It does not send this domain to an external lookup API or mark sibling subdomains as harmful. Not listed does not mean safe. Snapshot age is download age, not proof that every entry was recently revalidated.

Homepage HTML only · Eight local rule families · local-security-v2

Checks use the fetched page and redirect chain. Scripts are not executed, forms are not submitted, and linked files are not downloaded. This is not a malware clearance.

Page resource inventory

Linked scripts6
Inline scripts19
Embedded frames1
External script hosts0

Counts describe the sampled HTML, not every resource loaded by the browser. External resources are common and are not automatically harmful.

No listed local patterns observed. The limited rule set cannot detect every threat or behavior.

External threat intelligence

Provider coverageNot checked

Local checks do not query external reputation databases. An unavailable check is never a clean result.

Registration

Domain information

Public RDAP observation
Canonical domainkoalendar.com
RegistrarPorkbun LLC
RegisteredJun 17, 2020
Domain age6 years
ExpiresJun 17, 2027
Registry statusesclient delete prohibited · client transfer prohibited
Report statePublished

Infrastructure

Network & hosting

Observed endpoint, not legal location
IP address151.101.1.195
Autonomous systemUnavailable
Network organizationUnavailable
Observed countryUnavailable
CDNNot detected
Web application firewallNot detected

At a glance

Infrastructure summary

Observed during this scan

A compact view of the connection, DNS and security surface. These observations describe what the scanner could verify at scan time and do not prove ownership or ongoing availability.

HTTP response200 · https://koalendar.com/
Endpoint151.101.1.195
NetworkUnavailable
CDN and WAFNot detected · Not detected
DNS surface21 records · 4 nameservers · 5 mail exchangers
Protection signals1 security headers · 2 technologies · DNSSEC unknown

Page telemetry

Observed page statistics

Safe metadata only

These counters describe the fetched response and sampled HTML. Script counts describe references in the markup, not a complete browser network log. Cookie counts cover observed response headers.

Response size313,459 bytes
HTTP check duration0 ms
Cookies observedUnavailable
Script resources6 · 0 external hosts
Frames and sampled checks1 frames · 6 resources checked

Encrypted transport

TLS certificate

Valid when observed
StatusValid when observed
ProtocolTLSv1.3
IssuercountryName=US, organizationName=Google Trust Services, commonName=WR3
Valid fromSep 14, 2026
Valid untilDec 13, 2026
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Resolution

DNS footprint

DNSKEY status unknown

DNSKEY presence does not verify the DNSSEC signature chain. Missing records can mean no record was returned or the lookup was unavailable.

A151.101.1.195TTL —
A151.101.65.195TTL —
NScuritiba.ns.porkbun.comTTL —
NSfortaleza.ns.porkbun.comTTL —
NSmaceio.ns.porkbun.comTTL —
NSsalvador.ns.porkbun.comTTL —
MX1 aspmx.l.google.comTTL —
MX10 alt3.aspmx.l.google.comTTL —
MX10 alt4.aspmx.l.google.comTTL —
MX5 alt1.aspmx.l.google.comTTL —
MX5 alt2.aspmx.l.google.comTTL —
TXTahrefs-site-verification_0d36b394e6aad0f7ac1a947561acd32610ea1f70d5831f6164f28c7dabd0587fTTL —
TXTahrefs-site-verification_3df4a30741f6864fd89503e49baf4b4ec0bd845042221f50b9501ef42fc8df39TTL —
TXTahrefs-site-verification_58f1932ce76cebb7fca8cf060b545dfee068fdf9dfb7b690038b5ccc32320747TTL —
TXTgoogle-site-verification=2OZnhkRST_y7nkJ3DdTRhd7ASlc4W4smhwe3sZXygDUTTL —
TXTgoogle-site-verification=6NRnoForQxQtsry8yt_sXPaY5PChzx8Z8z6KXG2RLxYTTL —
TXTMS=3074F4CFE94762F7927D2EC49AB2C904D46694D1TTL —
TXToneleet-domain-verification-9a7a01d0-7eb3-4469-9dce-c011ab36185dTTL —
TXTv=spf1 include:_spf.mlsend.com include:_spf.google.com include:146633872.spf10.hubspotemail.net ~allTTL —
TXTyahoo-verification-key=K/4Oia2qVZP0w9YeaATXp2vIKHCbG9AA/YeFKiJX9Ho=TTL —
TXTzoom-domain-verification = 1fe54aea-b0c4-4719-b1fb-9fa60c884f31TTL —

DNS observations · no external lookup API

Domain email protection

Exact-host SPF and DMARC observations help the owner investigate email impersonation risks. They are separate from website malware checks and do not change the Safety Score.

SPFPolicy record observed, not fully validated
DMARCPolicy record observed, not fully validated

What to do next

Review the records with your mail administrator. Inventory legitimate senders and test SPF and DKIM alignment before enforcing a stricter DMARC policy. Fix duplicate records and investigate overly permissive SPF rules.

This bounded check does not send email, probe SMTP, evaluate recursive SPF includes, verify DKIM signatures or apply organizational-domain DMARC inheritance. A missing subdomain record does not prove that no inherited protection exists. A DNS timeout is unknown, not an absent record. A policy record is not proof that messages authenticate successfully.

Responsible disclosure

security.txt

RFC 9116 observation

No readable security.txt file was observed at the standard locations. This is informational and is not evidence of malware.

Browser protections

Security headers

1 observed
strict-transport-securitypresent max-age=31556926

Response headers

Cookie protections

Passive observation

No Set-Cookie header was observed on the sampled homepage response. Other pages may set cookies separately.

Detected stack

Technologies

Bootstrap 80% Tailwind CSS 72%

Versions are shown only when publicly exposed by the page or response headers. An observed version is not, by itself, proof of a vulnerability.

JavaScript library advisories

4 sampled JavaScript files checked locally with Retire.js. Database snapshot: 2026-09-30T02:40:06.930Z.

No supported library version was identified in the sampled files. This does not establish that the scripts are safe.

A version match is not proof that the website is infected or that an issue is exploitable here. Owners should review the advisory, check whether their code is affected and test an update. Up to four external script files are sampled, not every dependency, inline script or dynamically loaded resource.

About this website

What the site says about itself

Learn about Koalendar, a bootstrapped scheduling platform used by thousands of teams worldwide to manage appointments, reduce no-shows, and simplify booking across calendars and locations.

View the site's About page ↗

This is publisher supplied information. The independent safety findings are shown separately.

Structured facts

Website identity & response

Public page metadata
Page titleFree Appointment Scheduling Software | Koalendar
First headingScheduling made simple
DescriptionSimplify scheduling with Koalendar. Free forever plan with unlimited meetings, booking pages, and calendar sync—ideal for teachers, coaches, teams, and small businesses.
Canonical URLhttps://koalendar.com
Final URLhttps://koalendar.com/
HTTP response200 · text/html; charset=utf-8 · duration unavailable
Languageen
Structured typesBreadcrumbList · ListItem · Organization · SoftwareApplication · WebApplication · WebPage · WebSite
Page page detectedhttps://koalendar.com/features/booking-pageAbout page detectedhttps://koalendar.com/about
missing100% evidence confidence
1100% evidence confidence
en100% evidence confidence
1100% evidence confidence
Local headers.cors wildcard origin100% evidence confidence
Local headers.cors present100% evidence confidence
Local headers.cors credentials with wildcard100% evidence confidence
Local headers.csp present100% evidence confidence
21100% evidence confidence
4100% evidence confidence
5100% evidence confidence
unavailable100% evidence confidence
Dns consistency.cname present100% evidence confidence
2100% evidence confidence
Local headers.permissions policy present100% evidence confidence
1100% evidence confidence
Local headers.hsts preload100% evidence confidence
31556926100% evidence confidence
Local headers.hsts include subdomains100% evidence confidence

Connection path

Redirect chain

0 recorded hops

No redirect hop was recorded for the sampled homepage.

Premium monitoring

Catch downtime and security changes automatically

Regular checks, availability history, and alert emails are reserved for Premium websites. Free reports remain point-in-time scans and do not create recurring server work.

Enable monitoring for this website

Compared with the previous scan

What changed

A comparison will appear after the next completed scan.

Explainable matching

Digital fingerprint

fingerprint-v1
clear-radar-wave-583

Comparable components help find technically related websites. A match does not prove common ownership.

DnsHashed private comparison value
TechnologiesHashed private comparison value

Material changes only

Change history

No meaningful changes recorded yet.

Website icon for koalendar.com

Visual evidence

Website screenshot

Screenshot of koalendar.com
Captured once in an isolated browser during this scan. Visual tint is an interface overlay. The original evidence is not duplicated.

For site owners

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Questions about koalendar.com

FAQ

Still have questions? Contact us →
Is koalendar.com safe to visit?

The latest Safety Score is 73/100 with 75% Evidence Confidence. This is a point-in-time assessment of observed technical signals, not a guarantee. Check the exact address and avoid entering payment details if anything looks unusual.

Did the scan detect malware on koalendar.com?

ClamAV found no signature match in the sampled homepage HTML. External scripts, downloads and private server files were not checked. This is not a whole-site malware clearance.

When was koalendar.com registered?

The public registry record shows Jun 17, 2020. Registration details may be privacy-protected or updated later.

Did koalendar.com have a valid TLS certificate?

The scanner observed a valid TLS certificate using TLSv1.3. A valid certificate alone does not establish that the site is safe.

How does koalendar.com describe itself?

The website's About page describes its purpose in the report above. This is publisher-supplied information and is separate from independent security findings.

Can a paid listing change this website's score?

No. Premium placement and owner-supplied pages are labelled separately. Technical evidence, the Safety Score and moderation decisions remain independent.